./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.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/popl20-bad-counter-queue.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 c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e --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 11:27:22,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 11:27:22,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 11:27:22,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 11:27:22,114 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 11:27:22,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 11:27:22,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 11:27:22,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 11:27:22,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 11:27:22,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 11:27:22,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 11:27:22,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 11:27:22,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 11:27:22,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 11:27:22,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 11:27:22,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 11:27:22,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 11:27:22,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 11:27:22,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 11:27:22,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 11:27:22,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 11:27:22,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 11:27:22,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 11:27:22,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 11:27:22,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 11:27:22,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 11:27:22,146 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 11:27:22,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 11:27:22,148 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 11:27:22,148 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 11:27:22,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 11:27:22,149 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 11:27:22,150 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 11:27:22,151 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 11:27:22,152 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 11:27:22,152 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 11:27:22,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 11:27:22,152 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 11:27:22,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 11:27:22,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 11:27:22,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 11:27:22,155 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 11:27:22,179 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 11:27:22,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 11:27:22,180 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 11:27:22,180 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 11:27:22,181 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 11:27:22,181 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 11:27:22,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 11:27:22,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 11:27:22,182 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 11:27:22,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 11:27:22,182 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 11:27:22,182 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 11:27:22,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 11:27:22,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 11:27:22,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 11:27:22,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 11:27:22,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 11:27:22,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 11:27:22,183 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 11:27:22,184 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 11:27:22,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 11:27:22,184 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 11:27:22,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 11:27:22,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 11:27:22,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 11:27:22,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 11:27:22,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:27:22,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 11:27:22,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 11:27:22,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 11:27:22,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 11:27:22,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 11:27:22,186 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 11:27:22,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 11:27:22,186 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 11:27:22,186 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 11:27:22,186 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 11:27:22,186 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 11:27:22,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 11:27:22,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 11:27:22,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 11:27:22,405 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 11:27:22,406 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 11:27:22,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c [2023-08-30 11:27:23,262 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 11:27:23,402 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 11:27:23,403 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c [2023-08-30 11:27:23,413 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8bffe5f8/5e92ca1df20542a8b63749a6a735f25d/FLAGf16762041 [2023-08-30 11:27:23,422 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8bffe5f8/5e92ca1df20542a8b63749a6a735f25d [2023-08-30 11:27:23,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 11:27:23,425 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 11:27:23,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 11:27:23,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 11:27:23,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 11:27:23,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:27:23" (1/1) ... [2023-08-30 11:27:23,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54463f33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:23, skipping insertion in model container [2023-08-30 11:27:23,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:27:23" (1/1) ... [2023-08-30 11:27:23,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 11:27:23,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 11:27:23,566 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/popl20-bad-counter-queue.wvr.c[2428,2441] [2023-08-30 11:27:23,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:27:23,577 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 11:27:23,594 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/popl20-bad-counter-queue.wvr.c[2428,2441] [2023-08-30 11:27:23,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:27:23,611 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:27:23,612 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:27:23,617 INFO L208 MainTranslator]: Completed translation [2023-08-30 11:27:23,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:23 WrapperNode [2023-08-30 11:27:23,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 11:27:23,618 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 11:27:23,619 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 11:27:23,619 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 11:27:23,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:23" (1/1) ... [2023-08-30 11:27:23,637 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:23" (1/1) ... [2023-08-30 11:27:23,662 INFO L138 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 180 [2023-08-30 11:27:23,663 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 11:27:23,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 11:27:23,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 11:27:23,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 11:27:23,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:23" (1/1) ... [2023-08-30 11:27:23,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:23" (1/1) ... [2023-08-30 11:27:23,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:23" (1/1) ... [2023-08-30 11:27:23,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:23" (1/1) ... [2023-08-30 11:27:23,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:23" (1/1) ... [2023-08-30 11:27:23,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:23" (1/1) ... [2023-08-30 11:27:23,704 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:23" (1/1) ... [2023-08-30 11:27:23,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:23" (1/1) ... [2023-08-30 11:27:23,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 11:27:23,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 11:27:23,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 11:27:23,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 11:27:23,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:23" (1/1) ... [2023-08-30 11:27:23,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:27:23,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:23,736 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 11:27:23,754 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 11:27:23,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 11:27:23,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 11:27:23,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 11:27:23,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 11:27:23,764 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 11:27:23,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 11:27:23,765 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 11:27:23,765 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 11:27:23,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 11:27:23,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 11:27:23,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 11:27:23,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 11:27:23,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 11:27:23,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 11:27:23,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 11:27:23,766 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 11:27:23,887 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 11:27:23,902 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 11:27:24,201 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 11:27:24,418 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 11:27:24,418 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 11:27:24,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:27:24 BoogieIcfgContainer [2023-08-30 11:27:24,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 11:27:24,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 11:27:24,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 11:27:24,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 11:27:24,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:27:23" (1/3) ... [2023-08-30 11:27:24,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9775ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:27:24, skipping insertion in model container [2023-08-30 11:27:24,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:23" (2/3) ... [2023-08-30 11:27:24,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9775ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:27:24, skipping insertion in model container [2023-08-30 11:27:24,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:27:24" (3/3) ... [2023-08-30 11:27:24,425 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2023-08-30 11:27:24,441 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 11:27:24,447 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 11:27:24,447 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-08-30 11:27:24,448 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 11:27:24,523 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 11:27:24,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 133 transitions, 282 flow [2023-08-30 11:27:24,607 INFO L130 PetriNetUnfolder]: 9/131 cut-off events. [2023-08-30 11:27:24,608 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 11:27:24,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 131 events. 9/131 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 189 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-08-30 11:27:24,612 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 133 transitions, 282 flow [2023-08-30 11:27:24,615 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 115 transitions, 239 flow [2023-08-30 11:27:24,617 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 11:27:24,630 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 115 transitions, 239 flow [2023-08-30 11:27:24,633 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 115 transitions, 239 flow [2023-08-30 11:27:24,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 115 transitions, 239 flow [2023-08-30 11:27:24,688 INFO L130 PetriNetUnfolder]: 8/115 cut-off events. [2023-08-30 11:27:24,688 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 11:27:24,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 115 events. 8/115 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 186 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-08-30 11:27:24,691 INFO L119 LiptonReduction]: Number of co-enabled transitions 1512 [2023-08-30 11:27:29,446 INFO L134 LiptonReduction]: Checked pairs total: 2936 [2023-08-30 11:27:29,447 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-30 11:27:29,456 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 11:27:29,459 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;@3cb0b752, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 11:27:29,460 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2023-08-30 11:27:29,461 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 11:27:29,461 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 11:27:29,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:29,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 11:27:29,462 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:29,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:29,465 INFO L85 PathProgramCache]: Analyzing trace with hash 22832, now seen corresponding path program 1 times [2023-08-30 11:27:29,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:29,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063926031] [2023-08-30 11:27:29,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:29,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:29,612 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 11:27:29,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:29,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063926031] [2023-08-30 11:27:29,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063926031] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:27:29,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:27:29,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:27:29,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90921992] [2023-08-30 11:27:29,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:27:29,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:27:29,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:29,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:27:29,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:27:29,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 248 [2023-08-30 11:27:29,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 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 11:27:29,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:29,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 248 [2023-08-30 11:27:29,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:29,818 INFO L130 PetriNetUnfolder]: 1009/1495 cut-off events. [2023-08-30 11:27:29,818 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2023-08-30 11:27:29,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3042 conditions, 1495 events. 1009/1495 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 7828 event pairs, 560 based on Foata normal form. 0/526 useless extension candidates. Maximal degree in co-relation 1398. Up to 742 conditions per place. [2023-08-30 11:27:29,833 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 53 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-30 11:27:29,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 57 transitions, 242 flow [2023-08-30 11:27:29,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:27:29,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:27:29,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2023-08-30 11:27:29,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510752688172043 [2023-08-30 11:27:29,843 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 380 transitions. [2023-08-30 11:27:29,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 380 transitions. [2023-08-30 11:27:29,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:29,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 380 transitions. [2023-08-30 11:27:29,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 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 11:27:29,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 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 11:27:29,850 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 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 11:27:29,852 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 79 flow. Second operand 3 states and 380 transitions. [2023-08-30 11:27:29,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 57 transitions, 242 flow [2023-08-30 11:27:29,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 57 transitions, 232 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 11:27:29,856 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 80 flow [2023-08-30 11:27:29,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-08-30 11:27:29,859 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2023-08-30 11:27:29,859 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 80 flow [2023-08-30 11:27:29,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 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 11:27:29,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:29,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 11:27:29,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 11:27:29,861 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:29,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:29,861 INFO L85 PathProgramCache]: Analyzing trace with hash 708676, now seen corresponding path program 1 times [2023-08-30 11:27:29,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:29,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610594316] [2023-08-30 11:27:29,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:29,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:29,903 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 11:27:29,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:29,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610594316] [2023-08-30 11:27:29,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610594316] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:27:29,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:27:29,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:27:29,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082626147] [2023-08-30 11:27:29,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:27:29,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:27:29,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:29,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:27:29,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:27:29,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 248 [2023-08-30 11:27:29,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 11:27:29,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:29,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 248 [2023-08-30 11:27:29,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:30,046 INFO L130 PetriNetUnfolder]: 1009/1494 cut-off events. [2023-08-30 11:27:30,047 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 11:27:30,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3023 conditions, 1494 events. 1009/1494 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 7818 event pairs, 560 based on Foata normal form. 0/525 useless extension candidates. Maximal degree in co-relation 1509. Up to 1478 conditions per place. [2023-08-30 11:27:30,052 INFO L137 encePairwiseOnDemand]: 246/248 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-30 11:27:30,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 134 flow [2023-08-30 11:27:30,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:27:30,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:27:30,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2023-08-30 11:27:30,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46236559139784944 [2023-08-30 11:27:30,054 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2023-08-30 11:27:30,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2023-08-30 11:27:30,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:30,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2023-08-30 11:27:30,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:30,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 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 11:27:30,057 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 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 11:27:30,057 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 80 flow. Second operand 3 states and 344 transitions. [2023-08-30 11:27:30,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 134 flow [2023-08-30 11:27:30,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 132 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:27:30,058 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 76 flow [2023-08-30 11:27:30,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-08-30 11:27:30,059 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2023-08-30 11:27:30,059 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 76 flow [2023-08-30 11:27:30,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 11:27:30,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:30,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 11:27:30,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 11:27:30,060 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:30,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:30,060 INFO L85 PathProgramCache]: Analyzing trace with hash 708682, now seen corresponding path program 1 times [2023-08-30 11:27:30,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:30,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420428321] [2023-08-30 11:27:30,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:30,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:30,101 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 11:27:30,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:30,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420428321] [2023-08-30 11:27:30,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420428321] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:30,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537528739] [2023-08-30 11:27:30,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:30,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:30,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:30,104 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 11:27:30,119 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 11:27:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:30,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:27:30,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:30,230 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 11:27:30,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:30,241 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 11:27:30,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537528739] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:30,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:30,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 11:27:30,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264515234] [2023-08-30 11:27:30,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:30,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:27:30,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:30,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:27:30,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:27:30,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 248 [2023-08-30 11:27:30,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 106.14285714285714) internal successors, (743), 7 states have internal predecessors, (743), 0 states have call successors, (0), 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 11:27:30,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:30,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 248 [2023-08-30 11:27:30,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:30,633 INFO L130 PetriNetUnfolder]: 2521/3732 cut-off events. [2023-08-30 11:27:30,634 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-30 11:27:30,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7541 conditions, 3732 events. 2521/3732 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 21812 event pairs, 1400 based on Foata normal form. 0/1323 useless extension candidates. Maximal degree in co-relation 7533. Up to 741 conditions per place. [2023-08-30 11:27:30,646 INFO L137 encePairwiseOnDemand]: 245/248 looper letters, 127 selfloop transitions, 5 changer transitions 0/134 dead transitions. [2023-08-30 11:27:30,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 134 transitions, 568 flow [2023-08-30 11:27:30,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 11:27:30,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 11:27:30,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 765 transitions. [2023-08-30 11:27:30,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141129032258065 [2023-08-30 11:27:30,648 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 765 transitions. [2023-08-30 11:27:30,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 765 transitions. [2023-08-30 11:27:30,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:30,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 765 transitions. [2023-08-30 11:27:30,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 127.5) internal successors, (765), 6 states have internal predecessors, (765), 0 states have call successors, (0), 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 11:27:30,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 0 states have call successors, (0), 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 11:27:30,653 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 0 states have call successors, (0), 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 11:27:30,653 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 76 flow. Second operand 6 states and 765 transitions. [2023-08-30 11:27:30,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 134 transitions, 568 flow [2023-08-30 11:27:30,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 134 transitions, 567 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:27:30,655 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 111 flow [2023-08-30 11:27:30,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=111, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2023-08-30 11:27:30,655 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-30 11:27:30,656 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 111 flow [2023-08-30 11:27:30,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 106.14285714285714) internal successors, (743), 7 states have internal predecessors, (743), 0 states have call successors, (0), 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 11:27:30,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:30,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 11:27:30,663 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 11:27:30,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:30,863 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:30,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:30,864 INFO L85 PathProgramCache]: Analyzing trace with hash 681077476, now seen corresponding path program 1 times [2023-08-30 11:27:30,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:30,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343601276] [2023-08-30 11:27:30,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:30,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:30,928 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 11:27:30,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:30,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343601276] [2023-08-30 11:27:30,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343601276] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:27:30,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:27:30,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 11:27:30,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794448272] [2023-08-30 11:27:30,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:27:30,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 11:27:30,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:30,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 11:27:30,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 11:27:30,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 248 [2023-08-30 11:27:30,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 111 flow. Second operand has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 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 11:27:30,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:30,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 248 [2023-08-30 11:27:30,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:31,225 INFO L130 PetriNetUnfolder]: 1701/2758 cut-off events. [2023-08-30 11:27:31,225 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 11:27:31,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5601 conditions, 2758 events. 1701/2758 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 17096 event pairs, 1129 based on Foata normal form. 0/1183 useless extension candidates. Maximal degree in co-relation 5589. Up to 2511 conditions per place. [2023-08-30 11:27:31,234 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 57 selfloop transitions, 4 changer transitions 2/64 dead transitions. [2023-08-30 11:27:31,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 64 transitions, 303 flow [2023-08-30 11:27:31,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:27:31,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:27:31,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 560 transitions. [2023-08-30 11:27:31,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2023-08-30 11:27:31,236 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 560 transitions. [2023-08-30 11:27:31,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 560 transitions. [2023-08-30 11:27:31,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:31,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 560 transitions. [2023-08-30 11:27:31,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:31,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 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 11:27:31,239 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 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 11:27:31,239 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 111 flow. Second operand 5 states and 560 transitions. [2023-08-30 11:27:31,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 64 transitions, 303 flow [2023-08-30 11:27:31,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 64 transitions, 295 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 11:27:31,241 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 135 flow [2023-08-30 11:27:31,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=135, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2023-08-30 11:27:31,242 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 9 predicate places. [2023-08-30 11:27:31,242 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 135 flow [2023-08-30 11:27:31,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 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 11:27:31,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:31,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:27:31,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 11:27:31,243 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:31,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:31,243 INFO L85 PathProgramCache]: Analyzing trace with hash -361780400, now seen corresponding path program 1 times [2023-08-30 11:27:31,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:31,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676205953] [2023-08-30 11:27:31,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:31,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:31,288 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 11:27:31,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:31,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676205953] [2023-08-30 11:27:31,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676205953] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:27:31,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:27:31,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:27:31,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54102505] [2023-08-30 11:27:31,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:27:31,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:27:31,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:31,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:27:31,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:27:31,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 248 [2023-08-30 11:27:31,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 36 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 11:27:31,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:31,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 248 [2023-08-30 11:27:31,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:31,569 INFO L130 PetriNetUnfolder]: 2776/4126 cut-off events. [2023-08-30 11:27:31,570 INFO L131 PetriNetUnfolder]: For 209/238 co-relation queries the response was YES. [2023-08-30 11:27:31,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9332 conditions, 4126 events. 2776/4126 cut-off events. For 209/238 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 24658 event pairs, 379 based on Foata normal form. 29/1811 useless extension candidates. Maximal degree in co-relation 9316. Up to 3459 conditions per place. [2023-08-30 11:27:31,585 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 45 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2023-08-30 11:27:31,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 286 flow [2023-08-30 11:27:31,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:27:31,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:27:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2023-08-30 11:27:31,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49193548387096775 [2023-08-30 11:27:31,587 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2023-08-30 11:27:31,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2023-08-30 11:27:31,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:31,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2023-08-30 11:27:31,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 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 11:27:31,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 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 11:27:31,589 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 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 11:27:31,589 INFO L175 Difference]: Start difference. First operand has 48 places, 36 transitions, 135 flow. Second operand 3 states and 366 transitions. [2023-08-30 11:27:31,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 286 flow [2023-08-30 11:27:31,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 55 transitions, 280 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 11:27:31,592 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 182 flow [2023-08-30 11:27:31,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2023-08-30 11:27:31,592 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 10 predicate places. [2023-08-30 11:27:31,592 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 182 flow [2023-08-30 11:27:31,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 11:27:31,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:31,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:27:31,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 11:27:31,593 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:31,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:31,594 INFO L85 PathProgramCache]: Analyzing trace with hash -361780404, now seen corresponding path program 1 times [2023-08-30 11:27:31,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:31,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928769312] [2023-08-30 11:27:31,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:31,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:31,752 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 11:27:31,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:31,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928769312] [2023-08-30 11:27:31,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928769312] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:31,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899239376] [2023-08-30 11:27:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:31,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:31,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:31,755 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 11:27:31,757 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 11:27:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:31,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 11:27:31,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:31,857 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 11:27:31,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:31,882 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 11:27:31,891 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 11:27:31,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:31,915 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_103 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_103) |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 11:27:31,931 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:31,931 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 11:27:31,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:31,941 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 11:27:31,945 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 11:27:31,970 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 11:27:31,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899239376] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:31,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:31,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-30 11:27:31,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991837370] [2023-08-30 11:27:31,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:31,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 11:27:31,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:31,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 11:27:31,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2023-08-30 11:27:31,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 248 [2023-08-30 11:27:31,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 182 flow. Second operand has 12 states, 12 states have (on average 83.25) internal successors, (999), 12 states have internal predecessors, (999), 0 states have call successors, (0), 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 11:27:31,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:31,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 248 [2023-08-30 11:27:31,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:32,465 INFO L130 PetriNetUnfolder]: 3288/5300 cut-off events. [2023-08-30 11:27:32,466 INFO L131 PetriNetUnfolder]: For 818/818 co-relation queries the response was YES. [2023-08-30 11:27:32,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14147 conditions, 5300 events. 3288/5300 cut-off events. For 818/818 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 36646 event pairs, 923 based on Foata normal form. 0/2772 useless extension candidates. Maximal degree in co-relation 14130. Up to 3113 conditions per place. [2023-08-30 11:27:32,491 INFO L137 encePairwiseOnDemand]: 235/248 looper letters, 76 selfloop transitions, 19 changer transitions 1/97 dead transitions. [2023-08-30 11:27:32,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 97 transitions, 572 flow [2023-08-30 11:27:32,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 11:27:32,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 11:27:32,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 737 transitions. [2023-08-30 11:27:32,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3714717741935484 [2023-08-30 11:27:32,494 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 737 transitions. [2023-08-30 11:27:32,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 737 transitions. [2023-08-30 11:27:32,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:32,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 737 transitions. [2023-08-30 11:27:32,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 92.125) internal successors, (737), 8 states have internal predecessors, (737), 0 states have call successors, (0), 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 11:27:32,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 248.0) internal successors, (2232), 9 states have internal predecessors, (2232), 0 states have call successors, (0), 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 11:27:32,498 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 248.0) internal successors, (2232), 9 states have internal predecessors, (2232), 0 states have call successors, (0), 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 11:27:32,498 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 182 flow. Second operand 8 states and 737 transitions. [2023-08-30 11:27:32,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 97 transitions, 572 flow [2023-08-30 11:27:32,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 97 transitions, 555 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:27:32,502 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 297 flow [2023-08-30 11:27:32,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=297, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2023-08-30 11:27:32,504 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 18 predicate places. [2023-08-30 11:27:32,504 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 297 flow [2023-08-30 11:27:32,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 83.25) internal successors, (999), 12 states have internal predecessors, (999), 0 states have call successors, (0), 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 11:27:32,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:32,505 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 11:27:32,513 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 11:27:32,711 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,SelfDestructingSolverStorable5 [2023-08-30 11:27:32,712 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:32,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:32,712 INFO L85 PathProgramCache]: Analyzing trace with hash -361791946, now seen corresponding path program 2 times [2023-08-30 11:27:32,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:32,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842455616] [2023-08-30 11:27:32,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:32,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:32,765 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 11:27:32,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:32,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842455616] [2023-08-30 11:27:32,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842455616] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:32,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975346382] [2023-08-30 11:27:32,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:27:32,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:32,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:32,767 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 11:27:32,769 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 11:27:32,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:27:32,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:27:32,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 11:27:32,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:32,843 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 11:27:32,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:27:32,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975346382] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:27:32,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:27:32,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 11:27:32,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878403071] [2023-08-30 11:27:32,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:27:32,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:27:32,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:32,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:27:32,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:27:32,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 248 [2023-08-30 11:27:32,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 297 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 11:27:32,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:32,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 248 [2023-08-30 11:27:32,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:33,235 INFO L130 PetriNetUnfolder]: 3496/5445 cut-off events. [2023-08-30 11:27:33,235 INFO L131 PetriNetUnfolder]: For 2895/2924 co-relation queries the response was YES. [2023-08-30 11:27:33,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15671 conditions, 5445 events. 3496/5445 cut-off events. For 2895/2924 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 36658 event pairs, 1613 based on Foata normal form. 30/3257 useless extension candidates. Maximal degree in co-relation 15651. Up to 5382 conditions per place. [2023-08-30 11:27:33,260 INFO L137 encePairwiseOnDemand]: 246/248 looper letters, 50 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-30 11:27:33,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 55 transitions, 389 flow [2023-08-30 11:27:33,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:27:33,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:27:33,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2023-08-30 11:27:33,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4650537634408602 [2023-08-30 11:27:33,261 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2023-08-30 11:27:33,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2023-08-30 11:27:33,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:33,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2023-08-30 11:27:33,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 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 11:27:33,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 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 11:27:33,264 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 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 11:27:33,264 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 297 flow. Second operand 3 states and 346 transitions. [2023-08-30 11:27:33,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 55 transitions, 389 flow [2023-08-30 11:27:33,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 55 transitions, 368 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-08-30 11:27:33,269 INFO L231 Difference]: Finished difference. Result has 53 places, 55 transitions, 268 flow [2023-08-30 11:27:33,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=53, PETRI_TRANSITIONS=55} [2023-08-30 11:27:33,270 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 14 predicate places. [2023-08-30 11:27:33,270 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 55 transitions, 268 flow [2023-08-30 11:27:33,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 11:27:33,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:33,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:27:33,275 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 11:27:33,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:33,477 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:33,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:33,478 INFO L85 PathProgramCache]: Analyzing trace with hash -361780403, now seen corresponding path program 1 times [2023-08-30 11:27:33,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:33,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423394243] [2023-08-30 11:27:33,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:33,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:33,615 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 11:27:33,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:33,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423394243] [2023-08-30 11:27:33,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423394243] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:33,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81033002] [2023-08-30 11:27:33,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:33,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:33,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:33,616 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 11:27:33,618 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 11:27:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:33,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 11:27:33,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:33,705 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 11:27:33,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:33,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:27:33,736 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 11:27:33,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:33,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:33,773 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 11:27:33,779 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:33,779 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 11:27:33,790 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 11:27:33,797 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 11:27:33,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81033002] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:33,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:33,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-30 11:27:33,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706107678] [2023-08-30 11:27:33,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:33,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 11:27:33,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:33,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 11:27:33,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-08-30 11:27:33,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 248 [2023-08-30 11:27:33,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 55 transitions, 268 flow. Second operand has 12 states, 12 states have (on average 88.25) internal successors, (1059), 12 states have internal predecessors, (1059), 0 states have call successors, (0), 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 11:27:33,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:33,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 248 [2023-08-30 11:27:33,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:34,434 INFO L130 PetriNetUnfolder]: 3324/5359 cut-off events. [2023-08-30 11:27:34,434 INFO L131 PetriNetUnfolder]: For 2232/2232 co-relation queries the response was YES. [2023-08-30 11:27:34,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14998 conditions, 5359 events. 3324/5359 cut-off events. For 2232/2232 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 37271 event pairs, 1055 based on Foata normal form. 0/3183 useless extension candidates. Maximal degree in co-relation 14981. Up to 3185 conditions per place. [2023-08-30 11:27:34,453 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 74 selfloop transitions, 21 changer transitions 1/97 dead transitions. [2023-08-30 11:27:34,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 97 transitions, 605 flow [2023-08-30 11:27:34,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 11:27:34,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 11:27:34,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 773 transitions. [2023-08-30 11:27:34,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961693548387094 [2023-08-30 11:27:34,455 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 773 transitions. [2023-08-30 11:27:34,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 773 transitions. [2023-08-30 11:27:34,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:34,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 773 transitions. [2023-08-30 11:27:34,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 96.625) internal successors, (773), 8 states have internal predecessors, (773), 0 states have call successors, (0), 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 11:27:34,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 248.0) internal successors, (2232), 9 states have internal predecessors, (2232), 0 states have call successors, (0), 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 11:27:34,458 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 248.0) internal successors, (2232), 9 states have internal predecessors, (2232), 0 states have call successors, (0), 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 11:27:34,458 INFO L175 Difference]: Start difference. First operand has 53 places, 55 transitions, 268 flow. Second operand 8 states and 773 transitions. [2023-08-30 11:27:34,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 97 transitions, 605 flow [2023-08-30 11:27:34,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 97 transitions, 604 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:27:34,463 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 320 flow [2023-08-30 11:27:34,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=320, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2023-08-30 11:27:34,463 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 20 predicate places. [2023-08-30 11:27:34,463 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 320 flow [2023-08-30 11:27:34,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 88.25) internal successors, (1059), 12 states have internal predecessors, (1059), 0 states have call successors, (0), 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 11:27:34,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:34,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:34,471 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 11:27:34,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:34,668 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:34,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:34,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1684645338, now seen corresponding path program 1 times [2023-08-30 11:27:34,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:34,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491767310] [2023-08-30 11:27:34,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:34,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:34,715 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 11:27:34,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:34,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491767310] [2023-08-30 11:27:34,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491767310] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:27:34,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:27:34,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 11:27:34,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242857710] [2023-08-30 11:27:34,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:27:34,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 11:27:34,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:34,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 11:27:34,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 11:27:34,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 248 [2023-08-30 11:27:34,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 100.4) internal successors, (502), 5 states have internal predecessors, (502), 0 states have call successors, (0), 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 11:27:34,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:34,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 248 [2023-08-30 11:27:34,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:35,125 INFO L130 PetriNetUnfolder]: 3092/5037 cut-off events. [2023-08-30 11:27:35,125 INFO L131 PetriNetUnfolder]: For 5814/5814 co-relation queries the response was YES. [2023-08-30 11:27:35,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15789 conditions, 5037 events. 3092/5037 cut-off events. For 5814/5814 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 34302 event pairs, 1683 based on Foata normal form. 0/3441 useless extension candidates. Maximal degree in co-relation 15771. Up to 4990 conditions per place. [2023-08-30 11:27:35,144 INFO L137 encePairwiseOnDemand]: 241/248 looper letters, 50 selfloop transitions, 2 changer transitions 15/69 dead transitions. [2023-08-30 11:27:35,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 69 transitions, 481 flow [2023-08-30 11:27:35,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:27:35,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:27:35,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 541 transitions. [2023-08-30 11:27:35,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43629032258064515 [2023-08-30 11:27:35,147 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 541 transitions. [2023-08-30 11:27:35,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 541 transitions. [2023-08-30 11:27:35,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:35,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 541 transitions. [2023-08-30 11:27:35,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 0 states have call successors, (0), 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 11:27:35,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 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 11:27:35,150 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 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 11:27:35,150 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 320 flow. Second operand 5 states and 541 transitions. [2023-08-30 11:27:35,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 69 transitions, 481 flow [2023-08-30 11:27:35,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 69 transitions, 472 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-30 11:27:35,154 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 308 flow [2023-08-30 11:27:35,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=62, PETRI_TRANSITIONS=54} [2023-08-30 11:27:35,155 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 23 predicate places. [2023-08-30 11:27:35,155 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 308 flow [2023-08-30 11:27:35,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.4) internal successors, (502), 5 states have internal predecessors, (502), 0 states have call successors, (0), 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 11:27:35,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:35,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:35,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 11:27:35,156 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:35,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:35,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1669844309, now seen corresponding path program 1 times [2023-08-30 11:27:35,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:35,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529004929] [2023-08-30 11:27:35,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:35,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:35,306 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 11:27:35,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:35,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529004929] [2023-08-30 11:27:35,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529004929] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:35,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210289754] [2023-08-30 11:27:35,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:35,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:35,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:35,308 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 11:27:35,310 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 11:27:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:35,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 11:27:35,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:35,420 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 11:27:35,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:35,451 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 11:27:35,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:35,473 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 11:27:35,479 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 11:27:35,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:35,499 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_217 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_217) c_~A~0.base) c_~A~0.offset) 4294967296)) is different from false [2023-08-30 11:27:35,527 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:35,527 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 11:27:35,532 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:35,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 117 [2023-08-30 11:27:35,554 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 11:27:35,558 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 11:27:35,581 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 11:27:35,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210289754] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:35,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:35,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-30 11:27:35,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328914703] [2023-08-30 11:27:35,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:35,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 11:27:35,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:35,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 11:27:35,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=143, Unknown=1, NotChecked=24, Total=210 [2023-08-30 11:27:35,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:27:35,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 54 transitions, 308 flow. Second operand has 15 states, 15 states have (on average 80.26666666666667) internal successors, (1204), 15 states have internal predecessors, (1204), 0 states have call successors, (0), 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 11:27:35,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:35,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:27:35,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:36,177 INFO L130 PetriNetUnfolder]: 3709/6154 cut-off events. [2023-08-30 11:27:36,177 INFO L131 PetriNetUnfolder]: For 6260/6260 co-relation queries the response was YES. [2023-08-30 11:27:36,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19401 conditions, 6154 events. 3709/6154 cut-off events. For 6260/6260 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 45053 event pairs, 1340 based on Foata normal form. 348/4602 useless extension candidates. Maximal degree in co-relation 19380. Up to 2496 conditions per place. [2023-08-30 11:27:36,201 INFO L137 encePairwiseOnDemand]: 236/248 looper letters, 64 selfloop transitions, 21 changer transitions 0/86 dead transitions. [2023-08-30 11:27:36,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 615 flow [2023-08-30 11:27:36,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:27:36,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:27:36,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 617 transitions. [2023-08-30 11:27:36,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3554147465437788 [2023-08-30 11:27:36,204 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 617 transitions. [2023-08-30 11:27:36,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 617 transitions. [2023-08-30 11:27:36,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:36,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 617 transitions. [2023-08-30 11:27:36,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.14285714285714) internal successors, (617), 7 states have internal predecessors, (617), 0 states have call successors, (0), 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 11:27:36,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:36,207 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:36,207 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 308 flow. Second operand 7 states and 617 transitions. [2023-08-30 11:27:36,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 615 flow [2023-08-30 11:27:36,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 552 flow, removed 27 selfloop flow, removed 8 redundant places. [2023-08-30 11:27:36,219 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 377 flow [2023-08-30 11:27:36,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=377, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2023-08-30 11:27:36,219 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 19 predicate places. [2023-08-30 11:27:36,219 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 377 flow [2023-08-30 11:27:36,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 80.26666666666667) internal successors, (1204), 15 states have internal predecessors, (1204), 0 states have call successors, (0), 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 11:27:36,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:36,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:36,224 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 11:27:36,424 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,SelfDestructingSolverStorable9 [2023-08-30 11:27:36,425 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:36,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:36,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1669844308, now seen corresponding path program 1 times [2023-08-30 11:27:36,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:36,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914909521] [2023-08-30 11:27:36,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:36,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:36,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:36,585 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 11:27:36,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:36,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914909521] [2023-08-30 11:27:36,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914909521] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:36,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431641213] [2023-08-30 11:27:36,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:36,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:36,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:36,586 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 11:27:36,588 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 11:27:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:36,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 11:27:36,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:36,674 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 11:27:36,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:36,700 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 11:27:36,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:36,721 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 11:27:36,727 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 11:27:36,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:36,747 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_251 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_251) c_~A~0.base) c_~A~0.offset) 9223372039002259456))) is different from false [2023-08-30 11:27:36,771 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:36,771 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 11:27:36,776 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:36,776 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 11:27:36,781 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 11:27:36,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-08-30 11:27:36,815 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 11:27:36,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431641213] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:36,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:36,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-30 11:27:36,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314547851] [2023-08-30 11:27:36,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:36,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 11:27:36,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:36,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 11:27:36,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=142, Unknown=2, NotChecked=24, Total=210 [2023-08-30 11:27:36,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:27:36,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 377 flow. Second operand has 15 states, 15 states have (on average 80.26666666666667) internal successors, (1204), 15 states have internal predecessors, (1204), 0 states have call successors, (0), 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 11:27:36,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:36,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:27:36,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:37,313 INFO L130 PetriNetUnfolder]: 3521/5850 cut-off events. [2023-08-30 11:27:37,314 INFO L131 PetriNetUnfolder]: For 7517/7517 co-relation queries the response was YES. [2023-08-30 11:27:37,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18565 conditions, 5850 events. 3521/5850 cut-off events. For 7517/7517 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 42552 event pairs, 1236 based on Foata normal form. 116/3786 useless extension candidates. Maximal degree in co-relation 18548. Up to 2496 conditions per place. [2023-08-30 11:27:37,336 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 63 selfloop transitions, 21 changer transitions 0/85 dead transitions. [2023-08-30 11:27:37,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 85 transitions, 626 flow [2023-08-30 11:27:37,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:27:37,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:27:37,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 614 transitions. [2023-08-30 11:27:37,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35368663594470046 [2023-08-30 11:27:37,338 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 614 transitions. [2023-08-30 11:27:37,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 614 transitions. [2023-08-30 11:27:37,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:37,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 614 transitions. [2023-08-30 11:27:37,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.71428571428571) internal successors, (614), 7 states have internal predecessors, (614), 0 states have call successors, (0), 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 11:27:37,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:37,341 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:37,341 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 377 flow. Second operand 7 states and 614 transitions. [2023-08-30 11:27:37,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 85 transitions, 626 flow [2023-08-30 11:27:37,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 85 transitions, 621 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 11:27:37,346 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 408 flow [2023-08-30 11:27:37,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=408, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2023-08-30 11:27:37,347 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 22 predicate places. [2023-08-30 11:27:37,347 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 408 flow [2023-08-30 11:27:37,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 80.26666666666667) internal successors, (1204), 15 states have internal predecessors, (1204), 0 states have call successors, (0), 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 11:27:37,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:37,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:37,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 11:27:37,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:37,552 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:37,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:37,552 INFO L85 PathProgramCache]: Analyzing trace with hash 225606470, now seen corresponding path program 1 times [2023-08-30 11:27:37,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:37,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813878167] [2023-08-30 11:27:37,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:37,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:37,744 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 11:27:37,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:37,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813878167] [2023-08-30 11:27:37,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813878167] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:37,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601348267] [2023-08-30 11:27:37,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:37,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:37,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:37,746 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 11:27:37,749 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 11:27:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:37,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 11:27:37,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:37,837 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 11:27:37,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:37,864 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 11:27:37,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:37,887 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 11:27:37,895 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 11:27:37,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:37,953 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:37,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 11:27:37,961 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:37,961 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 11:27:37,965 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 11:27:37,970 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 11:27:37,992 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 11:27:37,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601348267] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:37,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:37,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-30 11:27:37,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348010630] [2023-08-30 11:27:37,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:37,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 11:27:37,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:37,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 11:27:37,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=161, Unknown=5, NotChecked=0, Total=210 [2023-08-30 11:27:38,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:27:38,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 408 flow. Second operand has 15 states, 15 states have (on average 80.4) internal successors, (1206), 15 states have internal predecessors, (1206), 0 states have call successors, (0), 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 11:27:38,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:38,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:27:38,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:38,613 INFO L130 PetriNetUnfolder]: 3809/6834 cut-off events. [2023-08-30 11:27:38,613 INFO L131 PetriNetUnfolder]: For 14921/15317 co-relation queries the response was YES. [2023-08-30 11:27:38,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23073 conditions, 6834 events. 3809/6834 cut-off events. For 14921/15317 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 53800 event pairs, 740 based on Foata normal form. 396/5106 useless extension candidates. Maximal degree in co-relation 23056. Up to 2865 conditions per place. [2023-08-30 11:27:38,633 INFO L137 encePairwiseOnDemand]: 236/248 looper letters, 82 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2023-08-30 11:27:38,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 95 transitions, 886 flow [2023-08-30 11:27:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:27:38,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:27:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 615 transitions. [2023-08-30 11:27:38,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3542626728110599 [2023-08-30 11:27:38,636 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 615 transitions. [2023-08-30 11:27:38,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 615 transitions. [2023-08-30 11:27:38,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:38,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 615 transitions. [2023-08-30 11:27:38,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.85714285714286) internal successors, (615), 7 states have internal predecessors, (615), 0 states have call successors, (0), 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 11:27:38,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:38,640 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:38,640 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 408 flow. Second operand 7 states and 615 transitions. [2023-08-30 11:27:38,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 95 transitions, 886 flow [2023-08-30 11:27:38,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 95 transitions, 864 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-30 11:27:38,644 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 450 flow [2023-08-30 11:27:38,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=450, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2023-08-30 11:27:38,644 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 26 predicate places. [2023-08-30 11:27:38,645 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 450 flow [2023-08-30 11:27:38,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 80.4) internal successors, (1206), 15 states have internal predecessors, (1206), 0 states have call successors, (0), 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 11:27:38,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:38,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:38,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 11:27:38,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:38,849 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:38,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:38,849 INFO L85 PathProgramCache]: Analyzing trace with hash 225606469, now seen corresponding path program 1 times [2023-08-30 11:27:38,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:38,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522806624] [2023-08-30 11:27:38,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:38,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:39,042 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 11:27:39,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:39,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522806624] [2023-08-30 11:27:39,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522806624] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:39,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295809889] [2023-08-30 11:27:39,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:39,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:39,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:39,044 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 11:27:39,046 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 11:27:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:39,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 11:27:39,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:39,136 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 11:27:39,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:39,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:27:39,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:39,174 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 11:27:39,181 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 11:27:39,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:39,203 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_319 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_319) c_~A~0.base) c_~A~0.offset) 9223372039002259456)) is different from false [2023-08-30 11:27:39,209 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_319 (Array Int Int)) (v_ArrVal_318 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_318) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_319) |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 11:27:39,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:39,215 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 11:27:39,219 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:39,219 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 11:27:39,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2023-08-30 11:27:39,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-08-30 11:27:39,259 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 11:27:39,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295809889] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:39,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:39,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-30 11:27:39,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175050927] [2023-08-30 11:27:39,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:39,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 11:27:39,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:39,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 11:27:39,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=122, Unknown=2, NotChecked=46, Total=210 [2023-08-30 11:27:39,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:27:39,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 450 flow. Second operand has 15 states, 15 states have (on average 80.4) internal successors, (1206), 15 states have internal predecessors, (1206), 0 states have call successors, (0), 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 11:27:39,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:39,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:27:39,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:39,821 INFO L130 PetriNetUnfolder]: 3585/6434 cut-off events. [2023-08-30 11:27:39,821 INFO L131 PetriNetUnfolder]: For 13692/14064 co-relation queries the response was YES. [2023-08-30 11:27:39,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25171 conditions, 6434 events. 3585/6434 cut-off events. For 13692/14064 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 49940 event pairs, 740 based on Foata normal form. 372/5634 useless extension candidates. Maximal degree in co-relation 25152. Up to 2785 conditions per place. [2023-08-30 11:27:39,843 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 81 selfloop transitions, 11 changer transitions 0/94 dead transitions. [2023-08-30 11:27:39,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 94 transitions, 906 flow [2023-08-30 11:27:39,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:27:39,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:27:39,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 612 transitions. [2023-08-30 11:27:39,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35253456221198154 [2023-08-30 11:27:39,845 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 612 transitions. [2023-08-30 11:27:39,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 612 transitions. [2023-08-30 11:27:39,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:39,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 612 transitions. [2023-08-30 11:27:39,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.42857142857143) internal successors, (612), 7 states have internal predecessors, (612), 0 states have call successors, (0), 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 11:27:39,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:39,849 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:39,849 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 450 flow. Second operand 7 states and 612 transitions. [2023-08-30 11:27:39,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 94 transitions, 906 flow [2023-08-30 11:27:39,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 94 transitions, 901 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 11:27:39,857 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 463 flow [2023-08-30 11:27:39,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=463, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2023-08-30 11:27:39,857 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 29 predicate places. [2023-08-30 11:27:39,858 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 463 flow [2023-08-30 11:27:39,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 80.4) internal successors, (1206), 15 states have internal predecessors, (1206), 0 states have call successors, (0), 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 11:27:39,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:39,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:39,867 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 11:27:40,062 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,SelfDestructingSolverStorable12 [2023-08-30 11:27:40,063 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:40,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:40,063 INFO L85 PathProgramCache]: Analyzing trace with hash 221402170, now seen corresponding path program 1 times [2023-08-30 11:27:40,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:40,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742046559] [2023-08-30 11:27:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:40,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:40,107 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 11:27:40,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:40,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742046559] [2023-08-30 11:27:40,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742046559] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:40,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914372916] [2023-08-30 11:27:40,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:40,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:40,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:40,109 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 11:27:40,110 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 11:27:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:40,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 11:27:40,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:40,217 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 11:27:40,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:40,252 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 11:27:40,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914372916] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:40,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:40,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-30 11:27:40,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934440080] [2023-08-30 11:27:40,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:40,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 11:27:40,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:40,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 11:27:40,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-30 11:27:40,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 11:27:40,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 463 flow. Second operand has 14 states, 14 states have (on average 97.5) internal successors, (1365), 14 states have internal predecessors, (1365), 0 states have call successors, (0), 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 11:27:40,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:40,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 11:27:40,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:40,945 INFO L130 PetriNetUnfolder]: 2986/5368 cut-off events. [2023-08-30 11:27:40,945 INFO L131 PetriNetUnfolder]: For 12620/13097 co-relation queries the response was YES. [2023-08-30 11:27:40,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21898 conditions, 5368 events. 2986/5368 cut-off events. For 12620/13097 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 40642 event pairs, 1889 based on Foata normal form. 597/5174 useless extension candidates. Maximal degree in co-relation 21879. Up to 3983 conditions per place. [2023-08-30 11:27:40,964 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 137 selfloop transitions, 13 changer transitions 3/154 dead transitions. [2023-08-30 11:27:40,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 154 transitions, 1377 flow [2023-08-30 11:27:40,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 11:27:40,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 11:27:40,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 972 transitions. [2023-08-30 11:27:40,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2023-08-30 11:27:40,966 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 972 transitions. [2023-08-30 11:27:40,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 972 transitions. [2023-08-30 11:27:40,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:40,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 972 transitions. [2023-08-30 11:27:40,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 108.0) internal successors, (972), 9 states have internal predecessors, (972), 0 states have call successors, (0), 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 11:27:40,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 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 11:27:40,971 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 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 11:27:40,971 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 463 flow. Second operand 9 states and 972 transitions. [2023-08-30 11:27:40,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 154 transitions, 1377 flow [2023-08-30 11:27:40,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 154 transitions, 1350 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-30 11:27:40,979 INFO L231 Difference]: Finished difference. Result has 76 places, 69 transitions, 633 flow [2023-08-30 11:27:40,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=633, PETRI_PLACES=76, PETRI_TRANSITIONS=69} [2023-08-30 11:27:40,980 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 37 predicate places. [2023-08-30 11:27:40,980 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 69 transitions, 633 flow [2023-08-30 11:27:40,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 97.5) internal successors, (1365), 14 states have internal predecessors, (1365), 0 states have call successors, (0), 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 11:27:40,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:40,981 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:40,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-30 11:27:41,187 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,SelfDestructingSolverStorable13 [2023-08-30 11:27:41,187 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:41,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:41,187 INFO L85 PathProgramCache]: Analyzing trace with hash -2059129778, now seen corresponding path program 2 times [2023-08-30 11:27:41,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:41,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916367556] [2023-08-30 11:27:41,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:41,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:41,394 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 11:27:41,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:41,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916367556] [2023-08-30 11:27:41,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916367556] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:41,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234526516] [2023-08-30 11:27:41,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:27:41,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:41,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:41,396 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 11:27:41,399 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 11:27:41,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:27:41,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:27:41,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 11:27:41,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:41,520 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 11:27:41,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:41,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:27:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:41,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:41,767 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:41,767 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 28 treesize of output 29 [2023-08-30 11:27:41,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:41,773 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 47 treesize of output 39 [2023-08-30 11:27:41,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2023-08-30 11:27:41,867 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 11:27:41,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234526516] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:41,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:41,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 11:27:41,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406692556] [2023-08-30 11:27:41,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:41,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 11:27:41,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:41,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 11:27:41,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-08-30 11:27:42,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 248 [2023-08-30 11:27:42,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 69 transitions, 633 flow. Second operand has 20 states, 20 states have (on average 89.35) internal successors, (1787), 20 states have internal predecessors, (1787), 0 states have call successors, (0), 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 11:27:42,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:42,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 248 [2023-08-30 11:27:42,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:45,347 INFO L130 PetriNetUnfolder]: 3863/6924 cut-off events. [2023-08-30 11:27:45,347 INFO L131 PetriNetUnfolder]: For 16163/16772 co-relation queries the response was YES. [2023-08-30 11:27:45,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29244 conditions, 6924 events. 3863/6924 cut-off events. For 16163/16772 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 54272 event pairs, 1206 based on Foata normal form. 643/6555 useless extension candidates. Maximal degree in co-relation 29221. Up to 2858 conditions per place. [2023-08-30 11:27:45,373 INFO L137 encePairwiseOnDemand]: 235/248 looper letters, 233 selfloop transitions, 99 changer transitions 3/336 dead transitions. [2023-08-30 11:27:45,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 336 transitions, 3129 flow [2023-08-30 11:27:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 11:27:45,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 11:27:45,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3799 transitions. [2023-08-30 11:27:45,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38296370967741933 [2023-08-30 11:27:45,379 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3799 transitions. [2023-08-30 11:27:45,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3799 transitions. [2023-08-30 11:27:45,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:45,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3799 transitions. [2023-08-30 11:27:45,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 94.975) internal successors, (3799), 40 states have internal predecessors, (3799), 0 states have call successors, (0), 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 11:27:45,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 248.0) internal successors, (10168), 41 states have internal predecessors, (10168), 0 states have call successors, (0), 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 11:27:45,395 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 248.0) internal successors, (10168), 41 states have internal predecessors, (10168), 0 states have call successors, (0), 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 11:27:45,395 INFO L175 Difference]: Start difference. First operand has 76 places, 69 transitions, 633 flow. Second operand 40 states and 3799 transitions. [2023-08-30 11:27:45,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 336 transitions, 3129 flow [2023-08-30 11:27:45,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 336 transitions, 3123 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 11:27:45,409 INFO L231 Difference]: Finished difference. Result has 122 places, 147 transitions, 1632 flow [2023-08-30 11:27:45,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1632, PETRI_PLACES=122, PETRI_TRANSITIONS=147} [2023-08-30 11:27:45,410 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 83 predicate places. [2023-08-30 11:27:45,410 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 147 transitions, 1632 flow [2023-08-30 11:27:45,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 89.35) internal successors, (1787), 20 states have internal predecessors, (1787), 0 states have call successors, (0), 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 11:27:45,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:45,411 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:45,417 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 11:27:45,615 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,SelfDestructingSolverStorable14 [2023-08-30 11:27:45,615 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:45,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:45,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2059129775, now seen corresponding path program 1 times [2023-08-30 11:27:45,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:45,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324773185] [2023-08-30 11:27:45,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:45,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:27:45,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:45,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324773185] [2023-08-30 11:27:45,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324773185] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:27:45,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:27:45,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 11:27:45,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749331979] [2023-08-30 11:27:45,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:27:45,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:27:45,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:45,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:27:45,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 11:27:45,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 248 [2023-08-30 11:27:45,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 147 transitions, 1632 flow. Second operand has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:45,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:45,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 248 [2023-08-30 11:27:45,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:46,288 INFO L130 PetriNetUnfolder]: 4334/7797 cut-off events. [2023-08-30 11:27:46,289 INFO L131 PetriNetUnfolder]: For 30169/30974 co-relation queries the response was YES. [2023-08-30 11:27:46,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35485 conditions, 7797 events. 4334/7797 cut-off events. For 30169/30974 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 62310 event pairs, 805 based on Foata normal form. 810/7947 useless extension candidates. Maximal degree in co-relation 35452. Up to 3572 conditions per place. [2023-08-30 11:27:46,325 INFO L137 encePairwiseOnDemand]: 236/248 looper letters, 171 selfloop transitions, 37 changer transitions 0/215 dead transitions. [2023-08-30 11:27:46,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 215 transitions, 2574 flow [2023-08-30 11:27:46,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:27:46,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:27:46,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 607 transitions. [2023-08-30 11:27:46,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48951612903225805 [2023-08-30 11:27:46,327 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 607 transitions. [2023-08-30 11:27:46,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 607 transitions. [2023-08-30 11:27:46,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:46,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 607 transitions. [2023-08-30 11:27:46,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.4) internal successors, (607), 5 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:46,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 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 11:27:46,329 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 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 11:27:46,329 INFO L175 Difference]: Start difference. First operand has 122 places, 147 transitions, 1632 flow. Second operand 5 states and 607 transitions. [2023-08-30 11:27:46,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 215 transitions, 2574 flow [2023-08-30 11:27:46,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 215 transitions, 2470 flow, removed 34 selfloop flow, removed 7 redundant places. [2023-08-30 11:27:46,391 INFO L231 Difference]: Finished difference. Result has 123 places, 170 transitions, 1988 flow [2023-08-30 11:27:46,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1453, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1988, PETRI_PLACES=123, PETRI_TRANSITIONS=170} [2023-08-30 11:27:46,392 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 84 predicate places. [2023-08-30 11:27:46,392 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 170 transitions, 1988 flow [2023-08-30 11:27:46,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:46,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:46,392 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:46,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 11:27:46,393 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:46,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:46,393 INFO L85 PathProgramCache]: Analyzing trace with hash -2059129777, now seen corresponding path program 1 times [2023-08-30 11:27:46,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:46,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753860237] [2023-08-30 11:27:46,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:46,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:46,565 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 11:27:46,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:46,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753860237] [2023-08-30 11:27:46,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753860237] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:46,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616300015] [2023-08-30 11:27:46,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:46,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:46,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:46,567 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 11:27:46,569 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 11:27:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:46,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 11:27:46,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:46,675 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 11:27:46,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:46,699 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 11:27:46,730 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 11:27:46,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:46,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:46,780 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 11:27:46,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:46,786 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 11:27:46,788 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 11:27:46,818 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 11:27:46,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616300015] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:46,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:46,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-30 11:27:46,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115773703] [2023-08-30 11:27:46,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:46,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 11:27:46,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:46,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 11:27:46,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=253, Unknown=2, NotChecked=0, Total=306 [2023-08-30 11:27:47,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 248 [2023-08-30 11:27:47,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 170 transitions, 1988 flow. Second operand has 18 states, 18 states have (on average 95.33333333333333) internal successors, (1716), 18 states have internal predecessors, (1716), 0 states have call successors, (0), 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 11:27:47,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:47,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 248 [2023-08-30 11:27:47,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:47,994 INFO L130 PetriNetUnfolder]: 3579/6448 cut-off events. [2023-08-30 11:27:47,994 INFO L131 PetriNetUnfolder]: For 35815/36291 co-relation queries the response was YES. [2023-08-30 11:27:48,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33334 conditions, 6448 events. 3579/6448 cut-off events. For 35815/36291 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 49111 event pairs, 1475 based on Foata normal form. 484/6683 useless extension candidates. Maximal degree in co-relation 33297. Up to 3272 conditions per place. [2023-08-30 11:27:48,021 INFO L137 encePairwiseOnDemand]: 235/248 looper letters, 149 selfloop transitions, 95 changer transitions 0/245 dead transitions. [2023-08-30 11:27:48,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 245 transitions, 3166 flow [2023-08-30 11:27:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 11:27:48,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 11:27:48,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1325 transitions. [2023-08-30 11:27:48,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4109801488833747 [2023-08-30 11:27:48,023 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1325 transitions. [2023-08-30 11:27:48,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1325 transitions. [2023-08-30 11:27:48,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:48,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1325 transitions. [2023-08-30 11:27:48,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 101.92307692307692) internal successors, (1325), 13 states have internal predecessors, (1325), 0 states have call successors, (0), 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 11:27:48,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 248.0) internal successors, (3472), 14 states have internal predecessors, (3472), 0 states have call successors, (0), 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 11:27:48,027 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 248.0) internal successors, (3472), 14 states have internal predecessors, (3472), 0 states have call successors, (0), 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 11:27:48,027 INFO L175 Difference]: Start difference. First operand has 123 places, 170 transitions, 1988 flow. Second operand 13 states and 1325 transitions. [2023-08-30 11:27:48,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 245 transitions, 3166 flow [2023-08-30 11:27:48,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 245 transitions, 3162 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-30 11:27:48,072 INFO L231 Difference]: Finished difference. Result has 138 places, 177 transitions, 2322 flow [2023-08-30 11:27:48,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1971, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2322, PETRI_PLACES=138, PETRI_TRANSITIONS=177} [2023-08-30 11:27:48,073 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 99 predicate places. [2023-08-30 11:27:48,073 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 177 transitions, 2322 flow [2023-08-30 11:27:48,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 95.33333333333333) internal successors, (1716), 18 states have internal predecessors, (1716), 0 states have call successors, (0), 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 11:27:48,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:48,074 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:48,078 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 11:27:48,277 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,SelfDestructingSolverStorable16 [2023-08-30 11:27:48,278 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:48,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:48,278 INFO L85 PathProgramCache]: Analyzing trace with hash -2059129774, now seen corresponding path program 1 times [2023-08-30 11:27:48,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:48,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878774870] [2023-08-30 11:27:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:48,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:27:48,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:48,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878774870] [2023-08-30 11:27:48,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878774870] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:27:48,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:27:48,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 11:27:48,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73348689] [2023-08-30 11:27:48,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:27:48,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:27:48,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:48,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:27:48,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 11:27:48,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 248 [2023-08-30 11:27:48,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 177 transitions, 2322 flow. Second operand has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:48,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:48,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 248 [2023-08-30 11:27:48,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:48,905 INFO L130 PetriNetUnfolder]: 3216/5958 cut-off events. [2023-08-30 11:27:48,905 INFO L131 PetriNetUnfolder]: For 42336/42968 co-relation queries the response was YES. [2023-08-30 11:27:48,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31267 conditions, 5958 events. 3216/5958 cut-off events. For 42336/42968 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 45829 event pairs, 551 based on Foata normal form. 901/6605 useless extension candidates. Maximal degree in co-relation 31225. Up to 2512 conditions per place. [2023-08-30 11:27:48,934 INFO L137 encePairwiseOnDemand]: 236/248 looper letters, 190 selfloop transitions, 56 changer transitions 0/253 dead transitions. [2023-08-30 11:27:48,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 253 transitions, 3611 flow [2023-08-30 11:27:48,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:27:48,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:27:48,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 607 transitions. [2023-08-30 11:27:48,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48951612903225805 [2023-08-30 11:27:48,936 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 607 transitions. [2023-08-30 11:27:48,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 607 transitions. [2023-08-30 11:27:48,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:48,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 607 transitions. [2023-08-30 11:27:48,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.4) internal successors, (607), 5 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:48,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 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 11:27:48,939 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 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 11:27:48,939 INFO L175 Difference]: Start difference. First operand has 138 places, 177 transitions, 2322 flow. Second operand 5 states and 607 transitions. [2023-08-30 11:27:48,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 253 transitions, 3611 flow [2023-08-30 11:27:48,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 253 transitions, 3421 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-08-30 11:27:48,981 INFO L231 Difference]: Finished difference. Result has 139 places, 209 transitions, 2953 flow [2023-08-30 11:27:48,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2953, PETRI_PLACES=139, PETRI_TRANSITIONS=209} [2023-08-30 11:27:48,982 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 100 predicate places. [2023-08-30 11:27:48,982 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 209 transitions, 2953 flow [2023-08-30 11:27:48,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:48,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:48,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:48,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 11:27:48,982 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:48,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:48,982 INFO L85 PathProgramCache]: Analyzing trace with hash 2059478032, now seen corresponding path program 1 times [2023-08-30 11:27:48,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:48,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473462021] [2023-08-30 11:27:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:48,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:49,048 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 11:27:49,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:49,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473462021] [2023-08-30 11:27:49,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473462021] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:49,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283678415] [2023-08-30 11:27:49,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:49,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:49,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:49,049 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 11:27:49,051 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 11:27:49,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:49,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 11:27:49,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:49,169 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 11:27:49,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:49,200 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 11:27:49,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283678415] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:49,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:49,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-30 11:27:49,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629841036] [2023-08-30 11:27:49,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:49,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 11:27:49,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:49,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 11:27:49,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-30 11:27:49,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 11:27:49,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 209 transitions, 2953 flow. Second operand has 14 states, 14 states have (on average 97.64285714285714) internal successors, (1367), 14 states have internal predecessors, (1367), 0 states have call successors, (0), 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 11:27:49,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:49,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 11:27:49,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:49,983 INFO L130 PetriNetUnfolder]: 3059/5622 cut-off events. [2023-08-30 11:27:49,983 INFO L131 PetriNetUnfolder]: For 47800/48022 co-relation queries the response was YES. [2023-08-30 11:27:49,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32073 conditions, 5622 events. 3059/5622 cut-off events. For 47800/48022 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 42238 event pairs, 1618 based on Foata normal form. 396/5808 useless extension candidates. Maximal degree in co-relation 32027. Up to 4507 conditions per place. [2023-08-30 11:27:50,015 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 220 selfloop transitions, 8 changer transitions 46/280 dead transitions. [2023-08-30 11:27:50,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 280 transitions, 4289 flow [2023-08-30 11:27:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 11:27:50,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 11:27:50,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 946 transitions. [2023-08-30 11:27:50,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42383512544802865 [2023-08-30 11:27:50,017 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 946 transitions. [2023-08-30 11:27:50,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 946 transitions. [2023-08-30 11:27:50,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:50,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 946 transitions. [2023-08-30 11:27:50,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 105.11111111111111) internal successors, (946), 9 states have internal predecessors, (946), 0 states have call successors, (0), 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 11:27:50,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 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 11:27:50,021 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 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 11:27:50,021 INFO L175 Difference]: Start difference. First operand has 139 places, 209 transitions, 2953 flow. Second operand 9 states and 946 transitions. [2023-08-30 11:27:50,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 280 transitions, 4289 flow [2023-08-30 11:27:50,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 280 transitions, 4283 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-30 11:27:50,087 INFO L231 Difference]: Finished difference. Result has 150 places, 189 transitions, 2663 flow [2023-08-30 11:27:50,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2663, PETRI_PLACES=150, PETRI_TRANSITIONS=189} [2023-08-30 11:27:50,088 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 111 predicate places. [2023-08-30 11:27:50,088 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 189 transitions, 2663 flow [2023-08-30 11:27:50,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 97.64285714285714) internal successors, (1367), 14 states have internal predecessors, (1367), 0 states have call successors, (0), 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 11:27:50,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:50,088 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:50,094 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 11:27:50,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:50,293 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:50,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:50,293 INFO L85 PathProgramCache]: Analyzing trace with hash 720584367, now seen corresponding path program 1 times [2023-08-30 11:27:50,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:50,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106343326] [2023-08-30 11:27:50,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:50,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:50,515 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 11:27:50,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:50,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106343326] [2023-08-30 11:27:50,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106343326] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:50,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907006109] [2023-08-30 11:27:50,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:50,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:50,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:50,517 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 11:27:50,519 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 11:27:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:50,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 11:27:50,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:50,606 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 14 treesize of output 12 [2023-08-30 11:27:50,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 11:27:50,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:27:50,656 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 11:27:50,673 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 11:27:50,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:50,703 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_511 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_511) c_~A~0.base) (+ c_~A~0.offset 4)) 4294967296)) is different from false [2023-08-30 11:27:50,727 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:50,728 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 11:27:50,733 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:50,733 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 11:27:50,738 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 11:27:50,755 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 11:27:50,782 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 11:27:50,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907006109] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:50,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:50,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-30 11:27:50,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157540606] [2023-08-30 11:27:50,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:50,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 11:27:50,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:50,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 11:27:50,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=4, NotChecked=26, Total=240 [2023-08-30 11:27:50,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:27:50,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 189 transitions, 2663 flow. Second operand has 16 states, 16 states have (on average 80.25) internal successors, (1284), 16 states have internal predecessors, (1284), 0 states have call successors, (0), 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 11:27:50,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:50,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:27:50,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:51,847 INFO L130 PetriNetUnfolder]: 3949/7225 cut-off events. [2023-08-30 11:27:51,848 INFO L131 PetriNetUnfolder]: For 71817/72207 co-relation queries the response was YES. [2023-08-30 11:27:51,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44191 conditions, 7225 events. 3949/7225 cut-off events. For 71817/72207 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 56254 event pairs, 1394 based on Foata normal form. 873/7800 useless extension candidates. Maximal degree in co-relation 44140. Up to 2680 conditions per place. [2023-08-30 11:27:51,892 INFO L137 encePairwiseOnDemand]: 236/248 looper letters, 203 selfloop transitions, 92 changer transitions 1/298 dead transitions. [2023-08-30 11:27:51,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 298 transitions, 4669 flow [2023-08-30 11:27:51,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 11:27:51,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 11:27:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 978 transitions. [2023-08-30 11:27:51,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3585043988269795 [2023-08-30 11:27:51,894 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 978 transitions. [2023-08-30 11:27:51,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 978 transitions. [2023-08-30 11:27:51,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:51,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 978 transitions. [2023-08-30 11:27:51,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 88.9090909090909) internal successors, (978), 11 states have internal predecessors, (978), 0 states have call successors, (0), 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 11:27:51,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 248.0) internal successors, (2976), 12 states have internal predecessors, (2976), 0 states have call successors, (0), 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 11:27:51,898 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 248.0) internal successors, (2976), 12 states have internal predecessors, (2976), 0 states have call successors, (0), 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 11:27:51,898 INFO L175 Difference]: Start difference. First operand has 150 places, 189 transitions, 2663 flow. Second operand 11 states and 978 transitions. [2023-08-30 11:27:51,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 298 transitions, 4669 flow [2023-08-30 11:27:51,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 298 transitions, 4584 flow, removed 38 selfloop flow, removed 5 redundant places. [2023-08-30 11:27:51,981 INFO L231 Difference]: Finished difference. Result has 151 places, 215 transitions, 3470 flow [2023-08-30 11:27:51,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2604, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3470, PETRI_PLACES=151, PETRI_TRANSITIONS=215} [2023-08-30 11:27:51,982 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 112 predicate places. [2023-08-30 11:27:51,982 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 215 transitions, 3470 flow [2023-08-30 11:27:51,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 80.25) internal successors, (1284), 16 states have internal predecessors, (1284), 0 states have call successors, (0), 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 11:27:51,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:51,982 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:51,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-30 11:27:52,186 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,SelfDestructingSolverStorable19 [2023-08-30 11:27:52,186 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:52,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:52,187 INFO L85 PathProgramCache]: Analyzing trace with hash 720584366, now seen corresponding path program 1 times [2023-08-30 11:27:52,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:52,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548831588] [2023-08-30 11:27:52,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:52,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:52,380 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 11:27:52,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:52,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548831588] [2023-08-30 11:27:52,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548831588] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:52,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451884312] [2023-08-30 11:27:52,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:52,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:52,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:52,382 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 11:27:52,385 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 11:27:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:52,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 11:27:52,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:52,510 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 11:27:52,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:52,538 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 11:27:52,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:52,566 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 11:27:52,591 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 11:27:52,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:52,631 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_549 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_549) c_~A~0.base) (+ c_~A~0.offset 4)) 9223372039002259456))) is different from false [2023-08-30 11:27:52,639 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_548 (Array Int Int)) (v_ArrVal_549 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_548) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_549) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2023-08-30 11:27:52,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:52,646 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 11:27:52,651 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:52,651 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 11:27:52,655 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 11:27:52,658 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 11:27:52,718 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 11:27:52,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451884312] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:52,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:52,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-30 11:27:52,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653131346] [2023-08-30 11:27:52,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:52,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 11:27:52,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:52,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 11:27:52,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=288, Unknown=2, NotChecked=70, Total=420 [2023-08-30 11:27:52,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:27:52,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 215 transitions, 3470 flow. Second operand has 21 states, 21 states have (on average 80.33333333333333) internal successors, (1687), 21 states have internal predecessors, (1687), 0 states have call successors, (0), 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 11:27:52,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:52,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:27:52,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:53,807 INFO L130 PetriNetUnfolder]: 3788/6952 cut-off events. [2023-08-30 11:27:53,807 INFO L131 PetriNetUnfolder]: For 72278/72641 co-relation queries the response was YES. [2023-08-30 11:27:53,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44238 conditions, 6952 events. 3788/6952 cut-off events. For 72278/72641 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 53626 event pairs, 1305 based on Foata normal form. 474/7138 useless extension candidates. Maximal degree in co-relation 44187. Up to 2632 conditions per place. [2023-08-30 11:27:53,850 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 224 selfloop transitions, 96 changer transitions 0/322 dead transitions. [2023-08-30 11:27:53,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 322 transitions, 5241 flow [2023-08-30 11:27:53,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 11:27:53,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 11:27:53,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1155 transitions. [2023-08-30 11:27:53,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3582506203473945 [2023-08-30 11:27:53,851 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1155 transitions. [2023-08-30 11:27:53,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1155 transitions. [2023-08-30 11:27:53,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:53,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1155 transitions. [2023-08-30 11:27:53,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 88.84615384615384) internal successors, (1155), 13 states have internal predecessors, (1155), 0 states have call successors, (0), 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 11:27:53,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 248.0) internal successors, (3472), 14 states have internal predecessors, (3472), 0 states have call successors, (0), 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 11:27:53,855 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 248.0) internal successors, (3472), 14 states have internal predecessors, (3472), 0 states have call successors, (0), 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 11:27:53,855 INFO L175 Difference]: Start difference. First operand has 151 places, 215 transitions, 3470 flow. Second operand 13 states and 1155 transitions. [2023-08-30 11:27:53,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 322 transitions, 5241 flow [2023-08-30 11:27:53,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 322 transitions, 5175 flow, removed 11 selfloop flow, removed 7 redundant places. [2023-08-30 11:27:53,960 INFO L231 Difference]: Finished difference. Result has 155 places, 214 transitions, 3585 flow [2023-08-30 11:27:53,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=3393, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3585, PETRI_PLACES=155, PETRI_TRANSITIONS=214} [2023-08-30 11:27:53,961 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 116 predicate places. [2023-08-30 11:27:53,961 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 214 transitions, 3585 flow [2023-08-30 11:27:53,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 80.33333333333333) internal successors, (1687), 21 states have internal predecessors, (1687), 0 states have call successors, (0), 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 11:27:53,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:53,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:53,967 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 11:27:54,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:54,166 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:54,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:54,166 INFO L85 PathProgramCache]: Analyzing trace with hash 800334842, now seen corresponding path program 1 times [2023-08-30 11:27:54,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:54,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022959520] [2023-08-30 11:27:54,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:54,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:54,203 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 11:27:54,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:54,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022959520] [2023-08-30 11:27:54,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022959520] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:27:54,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:27:54,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 11:27:54,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142382936] [2023-08-30 11:27:54,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:27:54,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:27:54,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:54,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:27:54,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 11:27:54,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 248 [2023-08-30 11:27:54,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 214 transitions, 3585 flow. Second operand has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 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 11:27:54,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:54,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 248 [2023-08-30 11:27:54,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:54,802 INFO L130 PetriNetUnfolder]: 3190/5810 cut-off events. [2023-08-30 11:27:54,803 INFO L131 PetriNetUnfolder]: For 80540/81163 co-relation queries the response was YES. [2023-08-30 11:27:54,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36717 conditions, 5810 events. 3190/5810 cut-off events. For 80540/81163 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 43352 event pairs, 643 based on Foata normal form. 919/6453 useless extension candidates. Maximal degree in co-relation 36668. Up to 3272 conditions per place. [2023-08-30 11:27:54,838 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 185 selfloop transitions, 42 changer transitions 0/235 dead transitions. [2023-08-30 11:27:54,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 235 transitions, 3976 flow [2023-08-30 11:27:54,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:27:54,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:27:54,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 591 transitions. [2023-08-30 11:27:54,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47661290322580646 [2023-08-30 11:27:54,840 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 591 transitions. [2023-08-30 11:27:54,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 591 transitions. [2023-08-30 11:27:54,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:54,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 591 transitions. [2023-08-30 11:27:54,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.2) internal successors, (591), 5 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:54,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 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 11:27:54,842 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 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 11:27:54,842 INFO L175 Difference]: Start difference. First operand has 155 places, 214 transitions, 3585 flow. Second operand 5 states and 591 transitions. [2023-08-30 11:27:54,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 235 transitions, 3976 flow [2023-08-30 11:27:54,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 235 transitions, 3807 flow, removed 21 selfloop flow, removed 10 redundant places. [2023-08-30 11:27:54,923 INFO L231 Difference]: Finished difference. Result has 147 places, 180 transitions, 2795 flow [2023-08-30 11:27:54,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2676, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2795, PETRI_PLACES=147, PETRI_TRANSITIONS=180} [2023-08-30 11:27:54,924 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 108 predicate places. [2023-08-30 11:27:54,924 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 180 transitions, 2795 flow [2023-08-30 11:27:54,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 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 11:27:54,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:54,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:54,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 11:27:54,924 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:54,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:54,924 INFO L85 PathProgramCache]: Analyzing trace with hash 800334841, now seen corresponding path program 1 times [2023-08-30 11:27:54,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:54,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99032478] [2023-08-30 11:27:54,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:54,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:54,953 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 11:27:54,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:54,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99032478] [2023-08-30 11:27:54,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99032478] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:27:54,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:27:54,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 11:27:54,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122885907] [2023-08-30 11:27:54,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:27:54,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:27:54,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:54,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:27:54,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 11:27:54,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 248 [2023-08-30 11:27:54,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 180 transitions, 2795 flow. Second operand has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 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 11:27:54,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:54,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 248 [2023-08-30 11:27:54,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:55,444 INFO L130 PetriNetUnfolder]: 2690/4846 cut-off events. [2023-08-30 11:27:55,445 INFO L131 PetriNetUnfolder]: For 61753/62288 co-relation queries the response was YES. [2023-08-30 11:27:55,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29312 conditions, 4846 events. 2690/4846 cut-off events. For 61753/62288 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34456 event pairs, 488 based on Foata normal form. 815/5417 useless extension candidates. Maximal degree in co-relation 29265. Up to 2455 conditions per place. [2023-08-30 11:27:55,470 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 157 selfloop transitions, 28 changer transitions 8/198 dead transitions. [2023-08-30 11:27:55,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 198 transitions, 3042 flow [2023-08-30 11:27:55,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:27:55,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:27:55,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 589 transitions. [2023-08-30 11:27:55,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2023-08-30 11:27:55,472 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 589 transitions. [2023-08-30 11:27:55,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 589 transitions. [2023-08-30 11:27:55,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:55,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 589 transitions. [2023-08-30 11:27:55,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:55,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 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 11:27:55,474 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 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 11:27:55,474 INFO L175 Difference]: Start difference. First operand has 147 places, 180 transitions, 2795 flow. Second operand 5 states and 589 transitions. [2023-08-30 11:27:55,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 198 transitions, 3042 flow [2023-08-30 11:27:55,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 198 transitions, 2798 flow, removed 30 selfloop flow, removed 9 redundant places. [2023-08-30 11:27:55,534 INFO L231 Difference]: Finished difference. Result has 135 places, 135 transitions, 1801 flow [2023-08-30 11:27:55,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1801, PETRI_PLACES=135, PETRI_TRANSITIONS=135} [2023-08-30 11:27:55,534 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 96 predicate places. [2023-08-30 11:27:55,534 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 135 transitions, 1801 flow [2023-08-30 11:27:55,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 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 11:27:55,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:55,535 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:55,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 11:27:55,535 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:55,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:55,535 INFO L85 PathProgramCache]: Analyzing trace with hash 901596962, now seen corresponding path program 1 times [2023-08-30 11:27:55,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:55,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737983932] [2023-08-30 11:27:55,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:55,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:55,762 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 11:27:55,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:55,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737983932] [2023-08-30 11:27:55,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737983932] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:55,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756331275] [2023-08-30 11:27:55,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:55,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:55,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:55,764 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 11:27:55,766 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 11:27:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:55,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 11:27:55,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:55,897 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 11:27:55,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:55,925 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 11:27:55,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:55,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:27:55,974 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 11:27:55,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:56,019 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_617 (Array Int Int))) (< 0 (+ 4294967296 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_617) c_~A~0.base) (+ c_~A~0.offset 4))))) is different from false [2023-08-30 11:27:58,090 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:58,090 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 11:27:58,096 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:58,096 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 159 treesize of output 147 [2023-08-30 11:27:58,100 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 29 treesize of output 25 [2023-08-30 11:27:58,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2023-08-30 11:27:58,150 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 11:27:58,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756331275] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:58,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:58,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-30 11:27:58,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581532362] [2023-08-30 11:27:58,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:58,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 11:27:58,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:58,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 11:27:58,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=321, Unknown=1, NotChecked=36, Total=420 [2023-08-30 11:27:58,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:27:58,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 135 transitions, 1801 flow. Second operand has 21 states, 21 states have (on average 80.42857142857143) internal successors, (1689), 21 states have internal predecessors, (1689), 0 states have call successors, (0), 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 11:27:58,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:58,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:27:58,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:59,092 INFO L130 PetriNetUnfolder]: 4022/7152 cut-off events. [2023-08-30 11:27:59,093 INFO L131 PetriNetUnfolder]: For 63204/63436 co-relation queries the response was YES. [2023-08-30 11:27:59,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39825 conditions, 7152 events. 4022/7152 cut-off events. For 63204/63436 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 52157 event pairs, 865 based on Foata normal form. 672/7600 useless extension candidates. Maximal degree in co-relation 39783. Up to 2152 conditions per place. [2023-08-30 11:27:59,134 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 285 selfloop transitions, 18 changer transitions 0/307 dead transitions. [2023-08-30 11:27:59,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 307 transitions, 5032 flow [2023-08-30 11:27:59,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 11:27:59,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 11:27:59,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 955 transitions. [2023-08-30 11:27:59,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3500733137829912 [2023-08-30 11:27:59,135 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 955 transitions. [2023-08-30 11:27:59,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 955 transitions. [2023-08-30 11:27:59,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:59,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 955 transitions. [2023-08-30 11:27:59,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 86.81818181818181) internal successors, (955), 11 states have internal predecessors, (955), 0 states have call successors, (0), 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 11:27:59,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 248.0) internal successors, (2976), 12 states have internal predecessors, (2976), 0 states have call successors, (0), 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 11:27:59,139 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 248.0) internal successors, (2976), 12 states have internal predecessors, (2976), 0 states have call successors, (0), 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 11:27:59,139 INFO L175 Difference]: Start difference. First operand has 135 places, 135 transitions, 1801 flow. Second operand 11 states and 955 transitions. [2023-08-30 11:27:59,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 307 transitions, 5032 flow [2023-08-30 11:27:59,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 307 transitions, 4838 flow, removed 7 selfloop flow, removed 9 redundant places. [2023-08-30 11:27:59,230 INFO L231 Difference]: Finished difference. Result has 130 places, 139 transitions, 1821 flow [2023-08-30 11:27:59,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1821, PETRI_PLACES=130, PETRI_TRANSITIONS=139} [2023-08-30 11:27:59,230 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 91 predicate places. [2023-08-30 11:27:59,230 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 139 transitions, 1821 flow [2023-08-30 11:27:59,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 80.42857142857143) internal successors, (1689), 21 states have internal predecessors, (1689), 0 states have call successors, (0), 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 11:27:59,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:59,231 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:59,237 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 11:27:59,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:59,431 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:59,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:59,432 INFO L85 PathProgramCache]: Analyzing trace with hash 901596961, now seen corresponding path program 1 times [2023-08-30 11:27:59,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:59,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064637383] [2023-08-30 11:27:59,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:59,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:59,632 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 11:27:59,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:59,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064637383] [2023-08-30 11:27:59,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064637383] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:59,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510220166] [2023-08-30 11:27:59,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:59,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:59,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:59,634 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 11:27:59,636 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 11:27:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:59,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 11:27:59,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:59,767 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 11:27:59,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:59,791 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 11:27:59,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:59,813 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 11:27:59,828 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 11:27:59,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:59,883 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_655 (Array Int Int)) (v_ArrVal_654 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_654) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_655) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456)) is different from false [2023-08-30 11:27:59,889 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:59,889 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 11:27:59,895 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:59,895 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 71 treesize of output 65 [2023-08-30 11:27:59,899 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 11:27:59,901 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 50 treesize of output 42 [2023-08-30 11:27:59,962 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 11:27:59,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510220166] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:59,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:59,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-30 11:27:59,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925776755] [2023-08-30 11:27:59,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:59,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 11:27:59,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:59,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 11:27:59,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=281, Unknown=7, NotChecked=34, Total=380 [2023-08-30 11:27:59,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:27:59,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 139 transitions, 1821 flow. Second operand has 20 states, 20 states have (on average 80.4) internal successors, (1608), 20 states have internal predecessors, (1608), 0 states have call successors, (0), 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 11:27:59,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:59,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:27:59,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:00,830 INFO L130 PetriNetUnfolder]: 3736/6646 cut-off events. [2023-08-30 11:28:00,830 INFO L131 PetriNetUnfolder]: For 53555/53771 co-relation queries the response was YES. [2023-08-30 11:28:00,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37886 conditions, 6646 events. 3736/6646 cut-off events. For 53555/53771 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 47742 event pairs, 795 based on Foata normal form. 436/6858 useless extension candidates. Maximal degree in co-relation 37847. Up to 2128 conditions per place. [2023-08-30 11:28:00,865 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 248 selfloop transitions, 18 changer transitions 0/270 dead transitions. [2023-08-30 11:28:00,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 270 transitions, 4259 flow [2023-08-30 11:28:00,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 11:28:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 11:28:00,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 863 transitions. [2023-08-30 11:28:00,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3479838709677419 [2023-08-30 11:28:00,866 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 863 transitions. [2023-08-30 11:28:00,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 863 transitions. [2023-08-30 11:28:00,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:00,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 863 transitions. [2023-08-30 11:28:00,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 86.3) internal successors, (863), 10 states have internal predecessors, (863), 0 states have call successors, (0), 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 11:28:00,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 248.0) internal successors, (2728), 11 states have internal predecessors, (2728), 0 states have call successors, (0), 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 11:28:00,869 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 248.0) internal successors, (2728), 11 states have internal predecessors, (2728), 0 states have call successors, (0), 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 11:28:00,869 INFO L175 Difference]: Start difference. First operand has 130 places, 139 transitions, 1821 flow. Second operand 10 states and 863 transitions. [2023-08-30 11:28:00,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 270 transitions, 4259 flow [2023-08-30 11:28:00,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 270 transitions, 4228 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-30 11:28:00,911 INFO L231 Difference]: Finished difference. Result has 133 places, 138 transitions, 1819 flow [2023-08-30 11:28:00,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1783, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1819, PETRI_PLACES=133, PETRI_TRANSITIONS=138} [2023-08-30 11:28:00,911 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 94 predicate places. [2023-08-30 11:28:00,911 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 138 transitions, 1819 flow [2023-08-30 11:28:00,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 80.4) internal successors, (1608), 20 states have internal predecessors, (1608), 0 states have call successors, (0), 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 11:28:00,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:00,912 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:00,916 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 11:28:01,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-30 11:28:01,116 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:01,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:01,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1483277833, now seen corresponding path program 2 times [2023-08-30 11:28:01,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:01,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143926833] [2023-08-30 11:28:01,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:01,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:01,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:01,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143926833] [2023-08-30 11:28:01,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143926833] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:01,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424723937] [2023-08-30 11:28:01,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:28:01,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:01,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:01,213 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 11:28:01,215 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 11:28:01,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:28:01,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:01,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 11:28:01,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:01,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:01,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424723937] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:01,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:01,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 11:28:01,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832514270] [2023-08-30 11:28:01,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:01,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 11:28:01,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:01,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 11:28:01,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-08-30 11:28:01,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 11:28:01,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 138 transitions, 1819 flow. Second operand has 19 states, 19 states have (on average 97.57894736842105) internal successors, (1854), 19 states have internal predecessors, (1854), 0 states have call successors, (0), 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 11:28:01,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:01,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 11:28:01,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:02,385 INFO L130 PetriNetUnfolder]: 3703/6720 cut-off events. [2023-08-30 11:28:02,385 INFO L131 PetriNetUnfolder]: For 54986/55522 co-relation queries the response was YES. [2023-08-30 11:28:02,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37452 conditions, 6720 events. 3703/6720 cut-off events. For 54986/55522 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 50024 event pairs, 1638 based on Foata normal form. 854/7334 useless extension candidates. Maximal degree in co-relation 37414. Up to 3234 conditions per place. [2023-08-30 11:28:02,417 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 217 selfloop transitions, 33 changer transitions 7/258 dead transitions. [2023-08-30 11:28:02,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 258 transitions, 3487 flow [2023-08-30 11:28:02,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 11:28:02,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 11:28:02,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1268 transitions. [2023-08-30 11:28:02,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4260752688172043 [2023-08-30 11:28:02,419 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1268 transitions. [2023-08-30 11:28:02,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1268 transitions. [2023-08-30 11:28:02,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:02,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1268 transitions. [2023-08-30 11:28:02,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 105.66666666666667) internal successors, (1268), 12 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:02,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 248.0) internal successors, (3224), 13 states have internal predecessors, (3224), 0 states have call successors, (0), 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 11:28:02,422 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 248.0) internal successors, (3224), 13 states have internal predecessors, (3224), 0 states have call successors, (0), 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 11:28:02,422 INFO L175 Difference]: Start difference. First operand has 133 places, 138 transitions, 1819 flow. Second operand 12 states and 1268 transitions. [2023-08-30 11:28:02,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 258 transitions, 3487 flow [2023-08-30 11:28:02,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 258 transitions, 3373 flow, removed 9 selfloop flow, removed 8 redundant places. [2023-08-30 11:28:02,473 INFO L231 Difference]: Finished difference. Result has 138 places, 134 transitions, 1830 flow [2023-08-30 11:28:02,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1830, PETRI_PLACES=138, PETRI_TRANSITIONS=134} [2023-08-30 11:28:02,473 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 99 predicate places. [2023-08-30 11:28:02,473 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 134 transitions, 1830 flow [2023-08-30 11:28:02,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 97.57894736842105) internal successors, (1854), 19 states have internal predecessors, (1854), 0 states have call successors, (0), 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 11:28:02,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:02,474 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 11:28:02,480 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 11:28:02,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 11:28:02,674 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:02,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:02,675 INFO L85 PathProgramCache]: Analyzing trace with hash -378348503, now seen corresponding path program 2 times [2023-08-30 11:28:02,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:02,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478241463] [2023-08-30 11:28:02,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:02,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:02,861 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 11:28:02,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:02,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478241463] [2023-08-30 11:28:02,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478241463] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:02,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227348438] [2023-08-30 11:28:02,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:28:02,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:02,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:02,862 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 11:28:02,862 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 11:28:02,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:28:02,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:02,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 11:28:02,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:02,999 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 11:28:03,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:03,022 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 11:28:03,088 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 11:28:03,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:03,176 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:03,177 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 11:28:03,181 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:03,182 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 11:28:03,239 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 11:28:03,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227348438] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:03,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:03,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-08-30 11:28:03,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307289725] [2023-08-30 11:28:03,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:03,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 11:28:03,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:03,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 11:28:03,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=572, Unknown=2, NotChecked=0, Total=650 [2023-08-30 11:28:04,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 248 [2023-08-30 11:28:04,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 134 transitions, 1830 flow. Second operand has 26 states, 26 states have (on average 95.38461538461539) internal successors, (2480), 26 states have internal predecessors, (2480), 0 states have call successors, (0), 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 11:28:04,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:04,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 248 [2023-08-30 11:28:04,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:05,356 INFO L130 PetriNetUnfolder]: 3710/6731 cut-off events. [2023-08-30 11:28:05,356 INFO L131 PetriNetUnfolder]: For 47180/47688 co-relation queries the response was YES. [2023-08-30 11:28:05,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37927 conditions, 6731 events. 3710/6731 cut-off events. For 47180/47688 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 50117 event pairs, 1872 based on Foata normal form. 514/6985 useless extension candidates. Maximal degree in co-relation 37885. Up to 3541 conditions per place. [2023-08-30 11:28:05,391 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 139 selfloop transitions, 76 changer transitions 2/218 dead transitions. [2023-08-30 11:28:05,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 218 transitions, 3198 flow [2023-08-30 11:28:05,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 11:28:05,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 11:28:05,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1600 transitions. [2023-08-30 11:28:05,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2023-08-30 11:28:05,393 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1600 transitions. [2023-08-30 11:28:05,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1600 transitions. [2023-08-30 11:28:05,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:05,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1600 transitions. [2023-08-30 11:28:05,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 100.0) internal successors, (1600), 16 states have internal predecessors, (1600), 0 states have call successors, (0), 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 11:28:05,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 248.0) internal successors, (4216), 17 states have internal predecessors, (4216), 0 states have call successors, (0), 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 11:28:05,397 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 248.0) internal successors, (4216), 17 states have internal predecessors, (4216), 0 states have call successors, (0), 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 11:28:05,397 INFO L175 Difference]: Start difference. First operand has 138 places, 134 transitions, 1830 flow. Second operand 16 states and 1600 transitions. [2023-08-30 11:28:05,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 218 transitions, 3198 flow [2023-08-30 11:28:05,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 218 transitions, 3181 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-30 11:28:05,478 INFO L231 Difference]: Finished difference. Result has 151 places, 149 transitions, 2240 flow [2023-08-30 11:28:05,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1817, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2240, PETRI_PLACES=151, PETRI_TRANSITIONS=149} [2023-08-30 11:28:05,479 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 112 predicate places. [2023-08-30 11:28:05,479 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 149 transitions, 2240 flow [2023-08-30 11:28:05,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 95.38461538461539) internal successors, (2480), 26 states have internal predecessors, (2480), 0 states have call successors, (0), 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 11:28:05,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:05,479 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 11:28:05,485 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 11:28:05,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 11:28:05,680 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:05,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:05,680 INFO L85 PathProgramCache]: Analyzing trace with hash -705525188, now seen corresponding path program 3 times [2023-08-30 11:28:05,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:05,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921268075] [2023-08-30 11:28:05,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:05,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:05,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:05,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921268075] [2023-08-30 11:28:05,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921268075] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:05,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068884145] [2023-08-30 11:28:05,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:28:05,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:05,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:05,906 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 11:28:05,925 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 11:28:06,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 11:28:06,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:06,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 11:28:06,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:06,081 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 11:28:06,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:06,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 11:28:06,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:06,128 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 11:28:06,180 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:06,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:06,304 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 11:28:06,305 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 33 treesize of output 39 [2023-08-30 11:28:06,310 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:06,310 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 11:28:06,313 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 11:28:06,366 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:06,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068884145] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:06,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:06,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-30 11:28:06,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187157761] [2023-08-30 11:28:06,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:06,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 11:28:06,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:06,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 11:28:06,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=611, Unknown=6, NotChecked=0, Total=702 [2023-08-30 11:28:07,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 248 [2023-08-30 11:28:07,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 149 transitions, 2240 flow. Second operand has 27 states, 27 states have (on average 83.33333333333333) internal successors, (2250), 27 states have internal predecessors, (2250), 0 states have call successors, (0), 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 11:28:07,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:07,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 248 [2023-08-30 11:28:07,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:08,114 INFO L130 PetriNetUnfolder]: 3709/6730 cut-off events. [2023-08-30 11:28:08,115 INFO L131 PetriNetUnfolder]: For 51598/52102 co-relation queries the response was YES. [2023-08-30 11:28:08,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38844 conditions, 6730 events. 3709/6730 cut-off events. For 51598/52102 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 49803 event pairs, 1892 based on Foata normal form. 505/6975 useless extension candidates. Maximal degree in co-relation 38800. Up to 3540 conditions per place. [2023-08-30 11:28:08,152 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 137 selfloop transitions, 76 changer transitions 2/216 dead transitions. [2023-08-30 11:28:08,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 216 transitions, 3343 flow [2023-08-30 11:28:08,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 11:28:08,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 11:28:08,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1405 transitions. [2023-08-30 11:28:08,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35408266129032256 [2023-08-30 11:28:08,155 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1405 transitions. [2023-08-30 11:28:08,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1405 transitions. [2023-08-30 11:28:08,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:08,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1405 transitions. [2023-08-30 11:28:08,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 87.8125) internal successors, (1405), 16 states have internal predecessors, (1405), 0 states have call successors, (0), 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 11:28:08,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 248.0) internal successors, (4216), 17 states have internal predecessors, (4216), 0 states have call successors, (0), 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 11:28:08,159 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 248.0) internal successors, (4216), 17 states have internal predecessors, (4216), 0 states have call successors, (0), 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 11:28:08,159 INFO L175 Difference]: Start difference. First operand has 151 places, 149 transitions, 2240 flow. Second operand 16 states and 1405 transitions. [2023-08-30 11:28:08,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 216 transitions, 3343 flow [2023-08-30 11:28:08,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 216 transitions, 3284 flow, removed 12 selfloop flow, removed 7 redundant places. [2023-08-30 11:28:08,246 INFO L231 Difference]: Finished difference. Result has 159 places, 147 transitions, 2298 flow [2023-08-30 11:28:08,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2146, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2298, PETRI_PLACES=159, PETRI_TRANSITIONS=147} [2023-08-30 11:28:08,246 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 120 predicate places. [2023-08-30 11:28:08,246 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 147 transitions, 2298 flow [2023-08-30 11:28:08,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 83.33333333333333) internal successors, (2250), 27 states have internal predecessors, (2250), 0 states have call successors, (0), 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 11:28:08,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:08,247 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:08,251 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 11:28:08,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:08,451 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:08,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:08,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1156095568, now seen corresponding path program 2 times [2023-08-30 11:28:08,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:08,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912776270] [2023-08-30 11:28:08,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:08,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:08,718 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 11:28:08,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:08,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912776270] [2023-08-30 11:28:08,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912776270] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:08,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871017422] [2023-08-30 11:28:08,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:28:08,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:08,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:08,720 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 11:28:08,722 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 11:28:08,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:28:08,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:08,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 11:28:08,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:08,885 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 11:28:08,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:08,913 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 11:28:08,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:08,990 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 11:28:09,025 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 11:28:09,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:09,083 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_811 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_811) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset 8)) 9223372039002259456))) is different from false [2023-08-30 11:28:09,089 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_811 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_811) c_~A~0.base) (+ c_~A~0.offset 8)) 9223372039002259456))) is different from false [2023-08-30 11:28:09,129 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:09,129 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 11:28:09,134 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:09,134 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 11:28:09,136 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 11:28:09,139 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 11:28:09,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-30 11:28:09,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871017422] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:09,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:09,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 11:28:09,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285837465] [2023-08-30 11:28:09,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:09,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 11:28:09,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:09,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 11:28:09,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=613, Unknown=9, NotChecked=102, Total=812 [2023-08-30 11:28:09,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:28:09,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 147 transitions, 2298 flow. Second operand has 29 states, 29 states have (on average 80.34482758620689) internal successors, (2330), 29 states have internal predecessors, (2330), 0 states have call successors, (0), 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 11:28:09,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:09,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:28:09,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:10,683 INFO L130 PetriNetUnfolder]: 4519/8176 cut-off events. [2023-08-30 11:28:10,683 INFO L131 PetriNetUnfolder]: For 76534/77138 co-relation queries the response was YES. [2023-08-30 11:28:10,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48230 conditions, 8176 events. 4519/8176 cut-off events. For 76534/77138 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 61146 event pairs, 1838 based on Foata normal form. 994/8860 useless extension candidates. Maximal degree in co-relation 48185. Up to 2371 conditions per place. [2023-08-30 11:28:10,734 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 249 selfloop transitions, 64 changer transitions 2/316 dead transitions. [2023-08-30 11:28:10,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 316 transitions, 4599 flow [2023-08-30 11:28:10,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 11:28:10,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 11:28:10,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1330 transitions. [2023-08-30 11:28:10,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575268817204301 [2023-08-30 11:28:10,741 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1330 transitions. [2023-08-30 11:28:10,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1330 transitions. [2023-08-30 11:28:10,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:10,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1330 transitions. [2023-08-30 11:28:10,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 88.66666666666667) internal successors, (1330), 15 states have internal predecessors, (1330), 0 states have call successors, (0), 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 11:28:10,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 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 11:28:10,745 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 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 11:28:10,745 INFO L175 Difference]: Start difference. First operand has 159 places, 147 transitions, 2298 flow. Second operand 15 states and 1330 transitions. [2023-08-30 11:28:10,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 316 transitions, 4599 flow [2023-08-30 11:28:10,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 316 transitions, 4518 flow, removed 2 selfloop flow, removed 10 redundant places. [2023-08-30 11:28:10,834 INFO L231 Difference]: Finished difference. Result has 165 places, 153 transitions, 2526 flow [2023-08-30 11:28:10,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2217, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2526, PETRI_PLACES=165, PETRI_TRANSITIONS=153} [2023-08-30 11:28:10,834 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 126 predicate places. [2023-08-30 11:28:10,834 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 153 transitions, 2526 flow [2023-08-30 11:28:10,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 80.34482758620689) internal successors, (2330), 29 states have internal predecessors, (2330), 0 states have call successors, (0), 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 11:28:10,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:10,835 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:10,840 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 11:28:11,036 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,SelfDestructingSolverStorable28 [2023-08-30 11:28:11,036 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:11,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:11,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1148688151, now seen corresponding path program 2 times [2023-08-30 11:28:11,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:11,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415467356] [2023-08-30 11:28:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:11,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:11,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:11,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415467356] [2023-08-30 11:28:11,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415467356] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:11,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319302518] [2023-08-30 11:28:11,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:28:11,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:11,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:11,102 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 11:28:11,105 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 11:28:11,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:28:11,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:11,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 11:28:11,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:11,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:11,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319302518] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:11,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:11,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 11:28:11,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926726923] [2023-08-30 11:28:11,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:11,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 11:28:11,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:11,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 11:28:11,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-08-30 11:28:11,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 11:28:11,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 153 transitions, 2526 flow. Second operand has 19 states, 19 states have (on average 97.57894736842105) internal successors, (1854), 19 states have internal predecessors, (1854), 0 states have call successors, (0), 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 11:28:11,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:11,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 11:28:11,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:12,351 INFO L130 PetriNetUnfolder]: 4190/7615 cut-off events. [2023-08-30 11:28:12,352 INFO L131 PetriNetUnfolder]: For 95504/95792 co-relation queries the response was YES. [2023-08-30 11:28:12,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46701 conditions, 7615 events. 4190/7615 cut-off events. For 95504/95792 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 55604 event pairs, 1972 based on Foata normal form. 474/7863 useless extension candidates. Maximal degree in co-relation 46653. Up to 5180 conditions per place. [2023-08-30 11:28:12,397 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 135 selfloop transitions, 5 changer transitions 141/284 dead transitions. [2023-08-30 11:28:12,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 284 transitions, 5068 flow [2023-08-30 11:28:12,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 11:28:12,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 11:28:12,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1240 transitions. [2023-08-30 11:28:12,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-30 11:28:12,399 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1240 transitions. [2023-08-30 11:28:12,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1240 transitions. [2023-08-30 11:28:12,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:12,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1240 transitions. [2023-08-30 11:28:12,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 103.33333333333333) internal successors, (1240), 12 states have internal predecessors, (1240), 0 states have call successors, (0), 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 11:28:12,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 248.0) internal successors, (3224), 13 states have internal predecessors, (3224), 0 states have call successors, (0), 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 11:28:12,402 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 248.0) internal successors, (3224), 13 states have internal predecessors, (3224), 0 states have call successors, (0), 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 11:28:12,402 INFO L175 Difference]: Start difference. First operand has 165 places, 153 transitions, 2526 flow. Second operand 12 states and 1240 transitions. [2023-08-30 11:28:12,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 284 transitions, 5068 flow [2023-08-30 11:28:12,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 284 transitions, 4831 flow, removed 20 selfloop flow, removed 10 redundant places. [2023-08-30 11:28:12,471 INFO L231 Difference]: Finished difference. Result has 170 places, 114 transitions, 1825 flow [2023-08-30 11:28:12,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2409, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1825, PETRI_PLACES=170, PETRI_TRANSITIONS=114} [2023-08-30 11:28:12,472 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 131 predicate places. [2023-08-30 11:28:12,472 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 114 transitions, 1825 flow [2023-08-30 11:28:12,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 97.57894736842105) internal successors, (1854), 19 states have internal predecessors, (1854), 0 states have call successors, (0), 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 11:28:12,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:12,473 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:12,478 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 11:28:12,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:12,677 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:12,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:12,677 INFO L85 PathProgramCache]: Analyzing trace with hash 664683825, now seen corresponding path program 3 times [2023-08-30 11:28:12,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:12,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616396077] [2023-08-30 11:28:12,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:12,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:12,908 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 11:28:12,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:12,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616396077] [2023-08-30 11:28:12,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616396077] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:12,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201840467] [2023-08-30 11:28:12,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:28:12,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:12,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:12,910 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 11:28:12,912 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 11:28:13,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 11:28:13,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:13,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 11:28:13,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:13,117 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 11:28:13,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:13,143 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 11:28:13,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:13,167 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 11:28:13,211 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 11:28:13,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:13,316 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:13,317 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 11:28:13,321 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:13,321 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 71 treesize of output 65 [2023-08-30 11:28:13,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-08-30 11:28:13,326 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 11:28:13,401 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 11:28:13,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201840467] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:13,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:13,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-30 11:28:13,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395610460] [2023-08-30 11:28:13,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:13,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 11:28:13,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:13,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 11:28:13,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=609, Unknown=9, NotChecked=0, Total=702 [2023-08-30 11:28:14,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:28:14,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 114 transitions, 1825 flow. Second operand has 27 states, 27 states have (on average 80.37037037037037) internal successors, (2170), 27 states have internal predecessors, (2170), 0 states have call successors, (0), 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 11:28:14,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:14,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:28:14,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:15,319 INFO L130 PetriNetUnfolder]: 3375/6115 cut-off events. [2023-08-30 11:28:15,319 INFO L131 PetriNetUnfolder]: For 66184/66660 co-relation queries the response was YES. [2023-08-30 11:28:15,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39209 conditions, 6115 events. 3375/6115 cut-off events. For 66184/66660 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 43876 event pairs, 1160 based on Foata normal form. 570/6467 useless extension candidates. Maximal degree in co-relation 39169. Up to 1875 conditions per place. [2023-08-30 11:28:15,357 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 187 selfloop transitions, 46 changer transitions 0/234 dead transitions. [2023-08-30 11:28:15,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 234 transitions, 3495 flow [2023-08-30 11:28:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 11:28:15,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 11:28:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1219 transitions. [2023-08-30 11:28:15,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35109447004608296 [2023-08-30 11:28:15,358 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1219 transitions. [2023-08-30 11:28:15,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1219 transitions. [2023-08-30 11:28:15,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:15,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1219 transitions. [2023-08-30 11:28:15,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 87.07142857142857) internal successors, (1219), 14 states have internal predecessors, (1219), 0 states have call successors, (0), 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 11:28:15,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 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 11:28:15,361 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 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 11:28:15,362 INFO L175 Difference]: Start difference. First operand has 170 places, 114 transitions, 1825 flow. Second operand 14 states and 1219 transitions. [2023-08-30 11:28:15,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 234 transitions, 3495 flow [2023-08-30 11:28:15,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 234 transitions, 2967 flow, removed 60 selfloop flow, removed 29 redundant places. [2023-08-30 11:28:15,504 INFO L231 Difference]: Finished difference. Result has 134 places, 113 transitions, 1465 flow [2023-08-30 11:28:15,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1373, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1465, PETRI_PLACES=134, PETRI_TRANSITIONS=113} [2023-08-30 11:28:15,505 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 95 predicate places. [2023-08-30 11:28:15,505 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 113 transitions, 1465 flow [2023-08-30 11:28:15,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 80.37037037037037) internal successors, (2170), 27 states have internal predecessors, (2170), 0 states have call successors, (0), 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 11:28:15,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:15,505 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:15,512 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 11:28:15,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:15,709 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:15,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:15,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1593736534, now seen corresponding path program 2 times [2023-08-30 11:28:15,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:15,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990949615] [2023-08-30 11:28:15,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:15,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:15,937 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 11:28:15,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:15,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990949615] [2023-08-30 11:28:15,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990949615] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:15,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427809585] [2023-08-30 11:28:15,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:28:15,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:15,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:15,939 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 11:28:15,941 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 11:28:16,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:28:16,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:16,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 11:28:16,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:16,127 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 11:28:16,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:16,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:28:16,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:16,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:28:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:16,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:16,562 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:16,563 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 31 treesize of output 32 [2023-08-30 11:28:16,569 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:16,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 159 [2023-08-30 11:28:16,575 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 31 treesize of output 25 [2023-08-30 11:28:16,578 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 36 treesize of output 24 [2023-08-30 11:28:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:16,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427809585] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:16,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:16,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 11:28:16,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536822780] [2023-08-30 11:28:16,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:16,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 11:28:16,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:16,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 11:28:16,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=714, Unknown=1, NotChecked=0, Total=812 [2023-08-30 11:28:17,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 248 [2023-08-30 11:28:17,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 113 transitions, 1465 flow. Second operand has 29 states, 29 states have (on average 78.44827586206897) internal successors, (2275), 29 states have internal predecessors, (2275), 0 states have call successors, (0), 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 11:28:17,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:17,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 248 [2023-08-30 11:28:17,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:39,314 INFO L130 PetriNetUnfolder]: 6777/11970 cut-off events. [2023-08-30 11:28:39,314 INFO L131 PetriNetUnfolder]: For 74535/74643 co-relation queries the response was YES. [2023-08-30 11:28:39,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66855 conditions, 11970 events. 6777/11970 cut-off events. For 74535/74643 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 90301 event pairs, 702 based on Foata normal form. 650/11891 useless extension candidates. Maximal degree in co-relation 66828. Up to 3715 conditions per place. [2023-08-30 11:28:39,384 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 707 selfloop transitions, 57 changer transitions 15/782 dead transitions. [2023-08-30 11:28:39,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 782 transitions, 12343 flow [2023-08-30 11:28:39,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 11:28:39,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 11:28:39,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2957 transitions. [2023-08-30 11:28:39,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3506878557874763 [2023-08-30 11:28:39,387 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2957 transitions. [2023-08-30 11:28:39,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2957 transitions. [2023-08-30 11:28:39,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:39,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2957 transitions. [2023-08-30 11:28:39,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 86.97058823529412) internal successors, (2957), 34 states have internal predecessors, (2957), 0 states have call successors, (0), 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 11:28:39,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 248.0) internal successors, (8680), 35 states have internal predecessors, (8680), 0 states have call successors, (0), 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 11:28:39,394 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 248.0) internal successors, (8680), 35 states have internal predecessors, (8680), 0 states have call successors, (0), 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 11:28:39,394 INFO L175 Difference]: Start difference. First operand has 134 places, 113 transitions, 1465 flow. Second operand 34 states and 2957 transitions. [2023-08-30 11:28:39,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 782 transitions, 12343 flow [2023-08-30 11:28:39,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 782 transitions, 11308 flow, removed 26 selfloop flow, removed 14 redundant places. [2023-08-30 11:28:39,446 INFO L231 Difference]: Finished difference. Result has 160 places, 157 transitions, 1974 flow [2023-08-30 11:28:39,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1974, PETRI_PLACES=160, PETRI_TRANSITIONS=157} [2023-08-30 11:28:39,447 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 121 predicate places. [2023-08-30 11:28:39,447 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 157 transitions, 1974 flow [2023-08-30 11:28:39,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 78.44827586206897) internal successors, (2275), 29 states have internal predecessors, (2275), 0 states have call successors, (0), 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 11:28:39,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:39,447 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:39,454 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 11:28:39,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:39,648 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:39,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:39,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1593736533, now seen corresponding path program 3 times [2023-08-30 11:28:39,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:39,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311850978] [2023-08-30 11:28:39,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:39,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:39,889 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 11:28:39,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:39,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311850978] [2023-08-30 11:28:39,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311850978] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:39,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145804333] [2023-08-30 11:28:39,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:28:39,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:39,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:39,891 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 11:28:39,893 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 11:28:40,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 11:28:40,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:40,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 11:28:40,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:40,105 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 11:28:40,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:40,136 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 11:28:40,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:40,163 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 11:28:40,216 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 11:28:40,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:40,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:40,341 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 11:28:40,348 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:40,348 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 71 treesize of output 65 [2023-08-30 11:28:40,352 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 11:28:40,355 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 50 treesize of output 42 [2023-08-30 11:28:40,437 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 11:28:40,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145804333] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:40,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:40,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-30 11:28:40,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867984645] [2023-08-30 11:28:40,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:40,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 11:28:40,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:40,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 11:28:40,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=613, Unknown=4, NotChecked=0, Total=702 [2023-08-30 11:28:40,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:28:40,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 157 transitions, 1974 flow. Second operand has 27 states, 27 states have (on average 80.44444444444444) internal successors, (2172), 27 states have internal predecessors, (2172), 0 states have call successors, (0), 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 11:28:40,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:40,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:28:40,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:41,993 INFO L130 PetriNetUnfolder]: 6005/10800 cut-off events. [2023-08-30 11:28:41,993 INFO L131 PetriNetUnfolder]: For 81603/81967 co-relation queries the response was YES. [2023-08-30 11:28:42,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65291 conditions, 10800 events. 6005/10800 cut-off events. For 81603/81967 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 81960 event pairs, 1316 based on Foata normal form. 1224/11749 useless extension candidates. Maximal degree in co-relation 65258. Up to 3255 conditions per place. [2023-08-30 11:28:42,051 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 269 selfloop transitions, 50 changer transitions 0/322 dead transitions. [2023-08-30 11:28:42,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 322 transitions, 4805 flow [2023-08-30 11:28:42,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 11:28:42,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 11:28:42,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1215 transitions. [2023-08-30 11:28:42,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34994239631336405 [2023-08-30 11:28:42,053 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1215 transitions. [2023-08-30 11:28:42,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1215 transitions. [2023-08-30 11:28:42,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:42,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1215 transitions. [2023-08-30 11:28:42,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 86.78571428571429) internal successors, (1215), 14 states have internal predecessors, (1215), 0 states have call successors, (0), 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 11:28:42,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 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 11:28:42,056 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 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 11:28:42,056 INFO L175 Difference]: Start difference. First operand has 160 places, 157 transitions, 1974 flow. Second operand 14 states and 1215 transitions. [2023-08-30 11:28:42,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 322 transitions, 4805 flow [2023-08-30 11:28:42,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 322 transitions, 4628 flow, removed 5 selfloop flow, removed 12 redundant places. [2023-08-30 11:28:42,132 INFO L231 Difference]: Finished difference. Result has 163 places, 159 transitions, 1982 flow [2023-08-30 11:28:42,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1793, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1982, PETRI_PLACES=163, PETRI_TRANSITIONS=159} [2023-08-30 11:28:42,132 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 124 predicate places. [2023-08-30 11:28:42,132 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 159 transitions, 1982 flow [2023-08-30 11:28:42,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 80.44444444444444) internal successors, (2172), 27 states have internal predecessors, (2172), 0 states have call successors, (0), 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 11:28:42,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:42,133 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 11:28:42,137 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 11:28:42,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:42,333 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:42,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:42,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1479327255, now seen corresponding path program 3 times [2023-08-30 11:28:42,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:42,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918077813] [2023-08-30 11:28:42,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:42,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:42,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:42,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918077813] [2023-08-30 11:28:42,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918077813] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:42,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81954772] [2023-08-30 11:28:42,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:28:42,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:42,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:42,417 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 11:28:42,418 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 11:28:42,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 11:28:42,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:42,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 11:28:42,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:42,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:42,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81954772] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:42,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:42,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-30 11:28:42,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470706587] [2023-08-30 11:28:42,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:42,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 11:28:42,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:42,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 11:28:42,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2023-08-30 11:28:42,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 11:28:42,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 159 transitions, 1982 flow. Second operand has 24 states, 24 states have (on average 97.45833333333333) internal successors, (2339), 24 states have internal predecessors, (2339), 0 states have call successors, (0), 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 11:28:42,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:42,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 11:28:42,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:44,041 INFO L130 PetriNetUnfolder]: 5278/9566 cut-off events. [2023-08-30 11:28:44,041 INFO L131 PetriNetUnfolder]: For 80897/81467 co-relation queries the response was YES. [2023-08-30 11:28:44,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57378 conditions, 9566 events. 5278/9566 cut-off events. For 80897/81467 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 73005 event pairs, 2250 based on Foata normal form. 725/10087 useless extension candidates. Maximal degree in co-relation 57344. Up to 4612 conditions per place. [2023-08-30 11:28:44,095 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 286 selfloop transitions, 35 changer transitions 40/364 dead transitions. [2023-08-30 11:28:44,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 364 transitions, 5030 flow [2023-08-30 11:28:44,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 11:28:44,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 11:28:44,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1566 transitions. [2023-08-30 11:28:44,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42096774193548386 [2023-08-30 11:28:44,097 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1566 transitions. [2023-08-30 11:28:44,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1566 transitions. [2023-08-30 11:28:44,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:44,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1566 transitions. [2023-08-30 11:28:44,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 104.4) internal successors, (1566), 15 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 11:28:44,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 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 11:28:44,101 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 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 11:28:44,101 INFO L175 Difference]: Start difference. First operand has 163 places, 159 transitions, 1982 flow. Second operand 15 states and 1566 transitions. [2023-08-30 11:28:44,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 364 transitions, 5030 flow [2023-08-30 11:28:44,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 364 transitions, 4699 flow, removed 11 selfloop flow, removed 11 redundant places. [2023-08-30 11:28:44,168 INFO L231 Difference]: Finished difference. Result has 171 places, 170 transitions, 2207 flow [2023-08-30 11:28:44,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1798, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2207, PETRI_PLACES=171, PETRI_TRANSITIONS=170} [2023-08-30 11:28:44,169 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 132 predicate places. [2023-08-30 11:28:44,169 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 170 transitions, 2207 flow [2023-08-30 11:28:44,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 97.45833333333333) internal successors, (2339), 24 states have internal predecessors, (2339), 0 states have call successors, (0), 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 11:28:44,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:44,170 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 11:28:44,176 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 11:28:44,370 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,SelfDestructingSolverStorable33 [2023-08-30 11:28:44,370 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:44,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:44,370 INFO L85 PathProgramCache]: Analyzing trace with hash 595146538, now seen corresponding path program 4 times [2023-08-30 11:28:44,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:44,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839931145] [2023-08-30 11:28:44,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:44,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:44,606 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:44,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:44,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839931145] [2023-08-30 11:28:44,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839931145] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:44,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380635726] [2023-08-30 11:28:44,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:28:44,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:44,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:44,608 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 11:28:44,610 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 11:28:44,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:28:44,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:44,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 11:28:44,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:44,819 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 11:28:44,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:44,846 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 11:28:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:44,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:45,012 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1046 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1046) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2023-08-30 11:28:45,018 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:45,018 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 11:28:45,024 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:45,024 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 11:28:45,027 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 11:28:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-08-30 11:28:45,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380635726] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:45,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:45,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-30 11:28:45,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982635872] [2023-08-30 11:28:45,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:45,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 11:28:45,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:45,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 11:28:45,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=726, Unknown=1, NotChecked=54, Total=870 [2023-08-30 11:28:45,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 248 [2023-08-30 11:28:45,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 170 transitions, 2207 flow. Second operand has 30 states, 30 states have (on average 83.4) internal successors, (2502), 30 states have internal predecessors, (2502), 0 states have call successors, (0), 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 11:28:45,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:45,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 248 [2023-08-30 11:28:45,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:46,632 INFO L130 PetriNetUnfolder]: 4950/8959 cut-off events. [2023-08-30 11:28:46,632 INFO L131 PetriNetUnfolder]: For 67010/67580 co-relation queries the response was YES. [2023-08-30 11:28:46,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53508 conditions, 8959 events. 4950/8959 cut-off events. For 67010/67580 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 65980 event pairs, 2475 based on Foata normal form. 574/9099 useless extension candidates. Maximal degree in co-relation 53470. Up to 5404 conditions per place. [2023-08-30 11:28:46,696 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 223 selfloop transitions, 71 changer transitions 0/297 dead transitions. [2023-08-30 11:28:46,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 297 transitions, 4234 flow [2023-08-30 11:28:46,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 11:28:46,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 11:28:46,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1745 transitions. [2023-08-30 11:28:46,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35181451612903225 [2023-08-30 11:28:46,698 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1745 transitions. [2023-08-30 11:28:46,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1745 transitions. [2023-08-30 11:28:46,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:46,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1745 transitions. [2023-08-30 11:28:46,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 87.25) internal successors, (1745), 20 states have internal predecessors, (1745), 0 states have call successors, (0), 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 11:28:46,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 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 11:28:46,702 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 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 11:28:46,702 INFO L175 Difference]: Start difference. First operand has 171 places, 170 transitions, 2207 flow. Second operand 20 states and 1745 transitions. [2023-08-30 11:28:46,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 297 transitions, 4234 flow [2023-08-30 11:28:46,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 297 transitions, 4225 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 11:28:46,805 INFO L231 Difference]: Finished difference. Result has 188 places, 183 transitions, 2532 flow [2023-08-30 11:28:46,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2198, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2532, PETRI_PLACES=188, PETRI_TRANSITIONS=183} [2023-08-30 11:28:46,805 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 149 predicate places. [2023-08-30 11:28:46,805 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 183 transitions, 2532 flow [2023-08-30 11:28:46,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 83.4) internal successors, (2502), 30 states have internal predecessors, (2502), 0 states have call successors, (0), 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 11:28:46,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:46,806 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 11:28:46,811 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 11:28:47,010 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,SelfDestructingSolverStorable34 [2023-08-30 11:28:47,010 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:47,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:47,011 INFO L85 PathProgramCache]: Analyzing trace with hash 595146539, now seen corresponding path program 4 times [2023-08-30 11:28:47,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:47,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716072948] [2023-08-30 11:28:47,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:47,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:47,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:47,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716072948] [2023-08-30 11:28:47,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716072948] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:47,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097821416] [2023-08-30 11:28:47,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:28:47,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:47,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:47,261 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 11:28:47,263 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 11:28:47,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:28:47,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:47,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 11:28:47,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:47,448 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 11:28:47,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:47,473 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 11:28:47,553 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:47,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:47,663 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:47,664 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 11:28:47,669 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:47,669 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 11:28:47,671 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 11:28:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:47,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097821416] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:47,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:47,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-30 11:28:47,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438809547] [2023-08-30 11:28:47,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:47,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 11:28:47,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:47,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 11:28:47,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=777, Unknown=2, NotChecked=0, Total=870 [2023-08-30 11:28:48,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 248 [2023-08-30 11:28:48,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 183 transitions, 2532 flow. Second operand has 30 states, 30 states have (on average 86.4) internal successors, (2592), 30 states have internal predecessors, (2592), 0 states have call successors, (0), 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 11:28:48,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:48,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 248 [2023-08-30 11:28:48,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:49,790 INFO L130 PetriNetUnfolder]: 4948/8955 cut-off events. [2023-08-30 11:28:49,790 INFO L131 PetriNetUnfolder]: For 71158/71728 co-relation queries the response was YES. [2023-08-30 11:28:49,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54837 conditions, 8955 events. 4948/8955 cut-off events. For 71158/71728 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 66078 event pairs, 2475 based on Foata normal form. 572/9093 useless extension candidates. Maximal degree in co-relation 54795. Up to 5402 conditions per place. [2023-08-30 11:28:49,840 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 222 selfloop transitions, 70 changer transitions 0/295 dead transitions. [2023-08-30 11:28:49,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 295 transitions, 4372 flow [2023-08-30 11:28:49,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 11:28:49,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 11:28:49,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1802 transitions. [2023-08-30 11:28:49,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633064516129032 [2023-08-30 11:28:49,843 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1802 transitions. [2023-08-30 11:28:49,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1802 transitions. [2023-08-30 11:28:49,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:49,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1802 transitions. [2023-08-30 11:28:49,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 90.1) internal successors, (1802), 20 states have internal predecessors, (1802), 0 states have call successors, (0), 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 11:28:49,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 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 11:28:49,847 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 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 11:28:49,847 INFO L175 Difference]: Start difference. First operand has 188 places, 183 transitions, 2532 flow. Second operand 20 states and 1802 transitions. [2023-08-30 11:28:49,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 295 transitions, 4372 flow [2023-08-30 11:28:49,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 295 transitions, 4311 flow, removed 10 selfloop flow, removed 8 redundant places. [2023-08-30 11:28:49,996 INFO L231 Difference]: Finished difference. Result has 199 places, 181 transitions, 2582 flow [2023-08-30 11:28:49,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2442, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2582, PETRI_PLACES=199, PETRI_TRANSITIONS=181} [2023-08-30 11:28:49,997 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 160 predicate places. [2023-08-30 11:28:49,997 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 181 transitions, 2582 flow [2023-08-30 11:28:49,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 86.4) internal successors, (2592), 30 states have internal predecessors, (2592), 0 states have call successors, (0), 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 11:28:49,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:49,997 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:50,002 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 11:28:50,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-30 11:28:50,198 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:50,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:50,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1722490339, now seen corresponding path program 4 times [2023-08-30 11:28:50,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:50,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156398228] [2023-08-30 11:28:50,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:50,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:50,285 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:50,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:50,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156398228] [2023-08-30 11:28:50,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156398228] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:50,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042658628] [2023-08-30 11:28:50,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:28:50,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:50,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:50,287 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 11:28:50,289 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 11:28:50,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:28:50,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:50,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 11:28:50,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:50,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:50,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042658628] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:50,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:50,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-30 11:28:50,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481619419] [2023-08-30 11:28:50,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:50,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 11:28:50,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:50,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 11:28:50,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2023-08-30 11:28:50,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 11:28:50,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 181 transitions, 2582 flow. Second operand has 24 states, 24 states have (on average 97.54166666666667) internal successors, (2341), 24 states have internal predecessors, (2341), 0 states have call successors, (0), 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 11:28:50,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:50,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 11:28:50,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:51,830 INFO L130 PetriNetUnfolder]: 4757/8689 cut-off events. [2023-08-30 11:28:51,830 INFO L131 PetriNetUnfolder]: For 73003/73019 co-relation queries the response was YES. [2023-08-30 11:28:51,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53379 conditions, 8689 events. 4757/8689 cut-off events. For 73003/73019 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 63116 event pairs, 2242 based on Foata normal form. 164/8449 useless extension candidates. Maximal degree in co-relation 53337. Up to 5840 conditions per place. [2023-08-30 11:28:51,886 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 135 selfloop transitions, 13 changer transitions 127/277 dead transitions. [2023-08-30 11:28:51,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 277 transitions, 4527 flow [2023-08-30 11:28:51,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 11:28:51,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 11:28:51,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1233 transitions. [2023-08-30 11:28:51,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41431451612903225 [2023-08-30 11:28:51,888 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1233 transitions. [2023-08-30 11:28:51,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1233 transitions. [2023-08-30 11:28:51,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:51,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1233 transitions. [2023-08-30 11:28:51,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 102.75) internal successors, (1233), 12 states have internal predecessors, (1233), 0 states have call successors, (0), 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 11:28:51,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 248.0) internal successors, (3224), 13 states have internal predecessors, (3224), 0 states have call successors, (0), 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 11:28:51,891 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 248.0) internal successors, (3224), 13 states have internal predecessors, (3224), 0 states have call successors, (0), 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 11:28:51,891 INFO L175 Difference]: Start difference. First operand has 199 places, 181 transitions, 2582 flow. Second operand 12 states and 1233 transitions. [2023-08-30 11:28:51,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 277 transitions, 4527 flow [2023-08-30 11:28:52,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 277 transitions, 4356 flow, removed 3 selfloop flow, removed 17 redundant places. [2023-08-30 11:28:52,023 INFO L231 Difference]: Finished difference. Result has 193 places, 122 transitions, 1638 flow [2023-08-30 11:28:52,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2420, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1638, PETRI_PLACES=193, PETRI_TRANSITIONS=122} [2023-08-30 11:28:52,023 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 154 predicate places. [2023-08-30 11:28:52,023 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 122 transitions, 1638 flow [2023-08-30 11:28:52,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 97.54166666666667) internal successors, (2341), 24 states have internal predecessors, (2341), 0 states have call successors, (0), 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 11:28:52,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:52,024 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:52,031 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 11:28:52,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:52,224 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:52,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:52,225 INFO L85 PathProgramCache]: Analyzing trace with hash -922839918, now seen corresponding path program 3 times [2023-08-30 11:28:52,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:52,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244536562] [2023-08-30 11:28:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:52,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:52,518 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:52,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:52,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244536562] [2023-08-30 11:28:52,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244536562] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:52,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084343462] [2023-08-30 11:28:52,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:28:52,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:52,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:52,520 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 11:28:52,523 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 11:28:52,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 11:28:52,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:52,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 11:28:52,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:52,782 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 11:28:52,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:52,825 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 11:28:52,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:52,941 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 11:28:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:53,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:53,127 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1171 (Array Int Int))) (< 0 (+ 9223372039002259456 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1171) c_~A~0.base) (+ c_~A~0.offset 12))))) is different from false [2023-08-30 11:28:53,173 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:53,174 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 11:28:53,180 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:53,180 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 159 treesize of output 147 [2023-08-30 11:28:53,184 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 20 [2023-08-30 11:28:53,187 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 29 treesize of output 25 [2023-08-30 11:28:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:53,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084343462] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:53,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:53,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-30 11:28:53,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704809499] [2023-08-30 11:28:53,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:53,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 11:28:53,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:53,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 11:28:53,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=999, Unknown=19, NotChecked=64, Total=1190 [2023-08-30 11:28:53,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:28:53,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 122 transitions, 1638 flow. Second operand has 35 states, 35 states have (on average 80.37142857142857) internal successors, (2813), 35 states have internal predecessors, (2813), 0 states have call successors, (0), 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 11:28:53,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:53,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:28:53,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:55,061 INFO L130 PetriNetUnfolder]: 5044/9046 cut-off events. [2023-08-30 11:28:55,061 INFO L131 PetriNetUnfolder]: For 80059/80662 co-relation queries the response was YES. [2023-08-30 11:28:55,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56659 conditions, 9046 events. 5044/9046 cut-off events. For 80059/80662 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 66116 event pairs, 1829 based on Foata normal form. 889/9743 useless extension candidates. Maximal degree in co-relation 56617. Up to 2717 conditions per place. [2023-08-30 11:28:55,123 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 417 selfloop transitions, 47 changer transitions 0/466 dead transitions. [2023-08-30 11:28:55,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 466 transitions, 6495 flow [2023-08-30 11:28:55,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 11:28:55,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 11:28:55,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1485 transitions. [2023-08-30 11:28:55,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35222960151802657 [2023-08-30 11:28:55,125 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1485 transitions. [2023-08-30 11:28:55,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1485 transitions. [2023-08-30 11:28:55,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:55,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1485 transitions. [2023-08-30 11:28:55,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 87.3529411764706) internal successors, (1485), 17 states have internal predecessors, (1485), 0 states have call successors, (0), 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 11:28:55,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 248.0) internal successors, (4464), 18 states have internal predecessors, (4464), 0 states have call successors, (0), 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 11:28:55,128 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 248.0) internal successors, (4464), 18 states have internal predecessors, (4464), 0 states have call successors, (0), 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 11:28:55,129 INFO L175 Difference]: Start difference. First operand has 193 places, 122 transitions, 1638 flow. Second operand 17 states and 1485 transitions. [2023-08-30 11:28:55,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 466 transitions, 6495 flow [2023-08-30 11:28:55,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 466 transitions, 6096 flow, removed 51 selfloop flow, removed 27 redundant places. [2023-08-30 11:28:55,458 INFO L231 Difference]: Finished difference. Result has 158 places, 128 transitions, 1634 flow [2023-08-30 11:28:55,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1403, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1634, PETRI_PLACES=158, PETRI_TRANSITIONS=128} [2023-08-30 11:28:55,458 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 119 predicate places. [2023-08-30 11:28:55,458 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 128 transitions, 1634 flow [2023-08-30 11:28:55,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 80.37142857142857) internal successors, (2813), 35 states have internal predecessors, (2813), 0 states have call successors, (0), 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 11:28:55,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:55,459 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:55,464 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 11:28:55,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 11:28:55,659 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:55,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:55,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1202323537, now seen corresponding path program 4 times [2023-08-30 11:28:55,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:55,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253555531] [2023-08-30 11:28:55,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:55,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:55,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:55,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253555531] [2023-08-30 11:28:55,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253555531] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:55,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60464197] [2023-08-30 11:28:55,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:28:55,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:55,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:55,967 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 11:28:55,969 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 11:28:56,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:28:56,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:56,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 11:28:56,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:56,194 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 11:28:56,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:56,223 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 11:28:56,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:56,269 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 11:28:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:56,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:58,569 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:58,569 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 11:28:58,575 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:58,575 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 11:28:58,579 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 11:28:58,595 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 11:28:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:58,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60464197] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:58,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:58,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2023-08-30 11:28:58,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894099425] [2023-08-30 11:28:58,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:58,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 11:28:58,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:58,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 11:28:58,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1005, Unknown=12, NotChecked=0, Total=1122 [2023-08-30 11:28:58,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:28:58,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 128 transitions, 1634 flow. Second operand has 34 states, 34 states have (on average 80.38235294117646) internal successors, (2733), 34 states have internal predecessors, (2733), 0 states have call successors, (0), 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 11:28:58,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:58,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:28:58,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:00,576 INFO L130 PetriNetUnfolder]: 4875/8763 cut-off events. [2023-08-30 11:29:00,576 INFO L131 PetriNetUnfolder]: For 64096/64705 co-relation queries the response was YES. [2023-08-30 11:29:00,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53656 conditions, 8763 events. 4875/8763 cut-off events. For 64096/64705 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 64043 event pairs, 1613 based on Foata normal form. 721/8770 useless extension candidates. Maximal degree in co-relation 53624. Up to 2673 conditions per place. [2023-08-30 11:29:00,625 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 416 selfloop transitions, 47 changer transitions 0/465 dead transitions. [2023-08-30 11:29:00,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 465 transitions, 6218 flow [2023-08-30 11:29:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 11:29:00,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 11:29:00,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1482 transitions. [2023-08-30 11:29:00,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3515180265654649 [2023-08-30 11:29:00,627 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1482 transitions. [2023-08-30 11:29:00,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1482 transitions. [2023-08-30 11:29:00,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:00,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1482 transitions. [2023-08-30 11:29:00,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 87.17647058823529) internal successors, (1482), 17 states have internal predecessors, (1482), 0 states have call successors, (0), 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 11:29:00,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 248.0) internal successors, (4464), 18 states have internal predecessors, (4464), 0 states have call successors, (0), 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 11:29:00,631 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 248.0) internal successors, (4464), 18 states have internal predecessors, (4464), 0 states have call successors, (0), 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 11:29:00,631 INFO L175 Difference]: Start difference. First operand has 158 places, 128 transitions, 1634 flow. Second operand 17 states and 1482 transitions. [2023-08-30 11:29:00,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 465 transitions, 6218 flow [2023-08-30 11:29:00,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 465 transitions, 6044 flow, removed 3 selfloop flow, removed 16 redundant places. [2023-08-30 11:29:00,702 INFO L231 Difference]: Finished difference. Result has 158 places, 127 transitions, 1542 flow [2023-08-30 11:29:00,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1542, PETRI_PLACES=158, PETRI_TRANSITIONS=127} [2023-08-30 11:29:00,702 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 119 predicate places. [2023-08-30 11:29:00,702 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 127 transitions, 1542 flow [2023-08-30 11:29:00,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 80.38235294117646) internal successors, (2733), 34 states have internal predecessors, (2733), 0 states have call successors, (0), 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 11:29:00,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:00,703 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:29:00,707 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 11:29:00,904 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,SelfDestructingSolverStorable38 [2023-08-30 11:29:00,904 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:00,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:00,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1016633807, now seen corresponding path program 5 times [2023-08-30 11:29:00,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:00,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893900630] [2023-08-30 11:29:00,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:00,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:01,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:01,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893900630] [2023-08-30 11:29:01,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893900630] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:01,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040608017] [2023-08-30 11:29:01,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:29:01,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:01,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:01,178 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 11:29:01,179 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 11:29:01,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 11:29:01,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:29:01,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 11:29:01,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:01,395 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 11:29:01,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:01,422 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 11:29:01,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:01,447 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 14 treesize of output 16 [2023-08-30 11:29:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:01,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:01,604 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1263 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1263) c_~A~0.base) (+ c_~A~0.offset 12)) 9223372039002259456)) is different from false [2023-08-30 11:29:01,610 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1263 (Array Int Int)) (v_ArrVal_1262 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1262) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1263) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456)) is different from false [2023-08-30 11:29:01,616 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:01,616 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 11:29:01,621 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:01,621 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 11:29:01,625 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 11:29:01,640 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 11:29:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-08-30 11:29:01,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040608017] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:01,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:01,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-30 11:29:01,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138106368] [2023-08-30 11:29:01,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:01,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 11:29:01,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:01,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 11:29:01,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=836, Unknown=2, NotChecked=118, Total=1056 [2023-08-30 11:29:01,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:29:01,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 127 transitions, 1542 flow. Second operand has 33 states, 33 states have (on average 80.45454545454545) internal successors, (2655), 33 states have internal predecessors, (2655), 0 states have call successors, (0), 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 11:29:01,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:01,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:29:01,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:03,445 INFO L130 PetriNetUnfolder]: 6132/11010 cut-off events. [2023-08-30 11:29:03,445 INFO L131 PetriNetUnfolder]: For 73938/74242 co-relation queries the response was YES. [2023-08-30 11:29:03,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65514 conditions, 11010 events. 6132/11010 cut-off events. For 73938/74242 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 81807 event pairs, 1192 based on Foata normal form. 824/11084 useless extension candidates. Maximal degree in co-relation 65484. Up to 3245 conditions per place. [2023-08-30 11:29:03,513 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 340 selfloop transitions, 41 changer transitions 0/383 dead transitions. [2023-08-30 11:29:03,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 383 transitions, 5982 flow [2023-08-30 11:29:03,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 11:29:03,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 11:29:03,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1477 transitions. [2023-08-30 11:29:03,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35033206831119545 [2023-08-30 11:29:03,515 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1477 transitions. [2023-08-30 11:29:03,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1477 transitions. [2023-08-30 11:29:03,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:03,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1477 transitions. [2023-08-30 11:29:03,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 86.88235294117646) internal successors, (1477), 17 states have internal predecessors, (1477), 0 states have call successors, (0), 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 11:29:03,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 248.0) internal successors, (4464), 18 states have internal predecessors, (4464), 0 states have call successors, (0), 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 11:29:03,601 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 248.0) internal successors, (4464), 18 states have internal predecessors, (4464), 0 states have call successors, (0), 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 11:29:03,601 INFO L175 Difference]: Start difference. First operand has 158 places, 127 transitions, 1542 flow. Second operand 17 states and 1477 transitions. [2023-08-30 11:29:03,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 383 transitions, 5982 flow [2023-08-30 11:29:03,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 383 transitions, 5643 flow, removed 10 selfloop flow, removed 14 redundant places. [2023-08-30 11:29:03,687 INFO L231 Difference]: Finished difference. Result has 162 places, 134 transitions, 1688 flow [2023-08-30 11:29:03,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1688, PETRI_PLACES=162, PETRI_TRANSITIONS=134} [2023-08-30 11:29:03,687 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 123 predicate places. [2023-08-30 11:29:03,687 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 134 transitions, 1688 flow [2023-08-30 11:29:03,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 80.45454545454545) internal successors, (2655), 33 states have internal predecessors, (2655), 0 states have call successors, (0), 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 11:29:03,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:03,688 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2023-08-30 11:29:03,693 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 11:29:03,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-30 11:29:03,893 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:03,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:03,894 INFO L85 PathProgramCache]: Analyzing trace with hash 705192089, now seen corresponding path program 5 times [2023-08-30 11:29:03,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:03,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052756817] [2023-08-30 11:29:03,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:03,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:04,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:04,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052756817] [2023-08-30 11:29:04,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052756817] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:04,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397772222] [2023-08-30 11:29:04,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:29:04,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:04,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:04,005 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 11:29:04,006 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 11:29:04,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-30 11:29:04,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:29:04,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 11:29:04,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:04,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:04,353 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:04,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397772222] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:04,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:04,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-30 11:29:04,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029567127] [2023-08-30 11:29:04,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:04,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 11:29:04,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:04,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 11:29:04,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-08-30 11:29:04,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 11:29:04,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 134 transitions, 1688 flow. Second operand has 29 states, 29 states have (on average 97.44827586206897) internal successors, (2826), 29 states have internal predecessors, (2826), 0 states have call successors, (0), 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 11:29:04,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:04,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 11:29:04,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:05,940 INFO L130 PetriNetUnfolder]: 5253/9560 cut-off events. [2023-08-30 11:29:05,940 INFO L131 PetriNetUnfolder]: For 76651/77463 co-relation queries the response was YES. [2023-08-30 11:29:05,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58885 conditions, 9560 events. 5253/9560 cut-off events. For 76651/77463 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 71091 event pairs, 2099 based on Foata normal form. 1016/10227 useless extension candidates. Maximal degree in co-relation 58853. Up to 3523 conditions per place. [2023-08-30 11:29:05,997 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 355 selfloop transitions, 43 changer transitions 44/444 dead transitions. [2023-08-30 11:29:05,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 444 transitions, 6346 flow [2023-08-30 11:29:05,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 11:29:05,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 11:29:05,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1886 transitions. [2023-08-30 11:29:06,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224910394265233 [2023-08-30 11:29:06,000 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1886 transitions. [2023-08-30 11:29:06,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1886 transitions. [2023-08-30 11:29:06,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:06,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1886 transitions. [2023-08-30 11:29:06,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 104.77777777777777) internal successors, (1886), 18 states have internal predecessors, (1886), 0 states have call successors, (0), 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 11:29:06,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 248.0) internal successors, (4712), 19 states have internal predecessors, (4712), 0 states have call successors, (0), 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 11:29:06,004 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 248.0) internal successors, (4712), 19 states have internal predecessors, (4712), 0 states have call successors, (0), 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 11:29:06,005 INFO L175 Difference]: Start difference. First operand has 162 places, 134 transitions, 1688 flow. Second operand 18 states and 1886 transitions. [2023-08-30 11:29:06,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 444 transitions, 6346 flow [2023-08-30 11:29:06,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 444 transitions, 5815 flow, removed 24 selfloop flow, removed 14 redundant places. [2023-08-30 11:29:06,081 INFO L231 Difference]: Finished difference. Result has 171 places, 164 transitions, 2196 flow [2023-08-30 11:29:06,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2196, PETRI_PLACES=171, PETRI_TRANSITIONS=164} [2023-08-30 11:29:06,081 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 132 predicate places. [2023-08-30 11:29:06,081 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 164 transitions, 2196 flow [2023-08-30 11:29:06,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 97.44827586206897) internal successors, (2826), 29 states have internal predecessors, (2826), 0 states have call successors, (0), 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 11:29:06,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:06,082 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:29:06,091 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 11:29:06,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:06,282 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:06,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:06,283 INFO L85 PathProgramCache]: Analyzing trace with hash -609917794, now seen corresponding path program 3 times [2023-08-30 11:29:06,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:06,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424461588] [2023-08-30 11:29:06,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:06,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:06,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:06,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424461588] [2023-08-30 11:29:06,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424461588] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:06,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45145786] [2023-08-30 11:29:06,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:29:06,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:06,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:06,597 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 11:29:06,599 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 11:29:06,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 11:29:06,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:29:06,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 11:29:06,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:06,927 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 11:29:06,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:06,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 11:29:06,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:06,984 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 11:29:07,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:07,012 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 11:29:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:07,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:07,231 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1353 (Array Int Int)) (v_ArrVal_1352 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1352) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1353) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296))) is different from false [2023-08-30 11:29:07,286 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 11:29:07,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 42 [2023-08-30 11:29:07,291 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:07,291 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 11:29:07,294 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 11:29:07,297 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 11:29:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-08-30 11:29:07,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45145786] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:07,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:07,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-30 11:29:07,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482773683] [2023-08-30 11:29:07,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:07,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 11:29:07,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:07,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 11:29:07,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1069, Unknown=10, NotChecked=66, Total=1260 [2023-08-30 11:29:07,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:29:07,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 164 transitions, 2196 flow. Second operand has 36 states, 36 states have (on average 80.41666666666667) internal successors, (2895), 36 states have internal predecessors, (2895), 0 states have call successors, (0), 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 11:29:07,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:07,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:29:07,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:09,100 INFO L130 PetriNetUnfolder]: 4615/8394 cut-off events. [2023-08-30 11:29:09,100 INFO L131 PetriNetUnfolder]: For 60539/60807 co-relation queries the response was YES. [2023-08-30 11:29:09,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50840 conditions, 8394 events. 4615/8394 cut-off events. For 60539/60807 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 60033 event pairs, 701 based on Foata normal form. 398/8319 useless extension candidates. Maximal degree in co-relation 50803. Up to 2578 conditions per place. [2023-08-30 11:29:09,152 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 501 selfloop transitions, 42 changer transitions 0/547 dead transitions. [2023-08-30 11:29:09,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 547 transitions, 9216 flow [2023-08-30 11:29:09,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 11:29:09,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 11:29:09,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1474 transitions. [2023-08-30 11:29:09,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34962049335863377 [2023-08-30 11:29:09,154 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1474 transitions. [2023-08-30 11:29:09,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1474 transitions. [2023-08-30 11:29:09,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:09,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1474 transitions. [2023-08-30 11:29:09,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 86.70588235294117) internal successors, (1474), 17 states have internal predecessors, (1474), 0 states have call successors, (0), 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 11:29:09,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 248.0) internal successors, (4464), 18 states have internal predecessors, (4464), 0 states have call successors, (0), 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 11:29:09,157 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 248.0) internal successors, (4464), 18 states have internal predecessors, (4464), 0 states have call successors, (0), 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 11:29:09,157 INFO L175 Difference]: Start difference. First operand has 171 places, 164 transitions, 2196 flow. Second operand 17 states and 1474 transitions. [2023-08-30 11:29:09,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 547 transitions, 9216 flow [2023-08-30 11:29:09,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 547 transitions, 9199 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 11:29:09,244 INFO L231 Difference]: Finished difference. Result has 181 places, 163 transitions, 2251 flow [2023-08-30 11:29:09,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2167, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2251, PETRI_PLACES=181, PETRI_TRANSITIONS=163} [2023-08-30 11:29:09,244 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 142 predicate places. [2023-08-30 11:29:09,245 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 163 transitions, 2251 flow [2023-08-30 11:29:09,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 80.41666666666667) internal successors, (2895), 36 states have internal predecessors, (2895), 0 states have call successors, (0), 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 11:29:09,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:09,245 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1] [2023-08-30 11:29:09,250 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 11:29:09,445 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,SelfDestructingSolverStorable41 [2023-08-30 11:29:09,445 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:09,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:09,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1111908101, now seen corresponding path program 6 times [2023-08-30 11:29:09,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:09,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408543059] [2023-08-30 11:29:09,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:09,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:09,749 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:09,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:09,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408543059] [2023-08-30 11:29:09,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408543059] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:09,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669223896] [2023-08-30 11:29:09,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:29:09,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:09,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:09,750 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 11:29:09,751 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 11:29:09,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-30 11:29:09,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:29:09,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 11:29:09,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:10,085 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 11:29:10,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:10,115 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 11:29:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:10,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:10,353 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1398 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1398) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 16 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-30 11:29:10,358 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:10,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-08-30 11:29:10,363 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:10,363 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 11:29:10,365 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 11:29:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-08-30 11:29:10,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669223896] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:10,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:10,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-30 11:29:10,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420031798] [2023-08-30 11:29:10,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:10,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 11:29:10,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:10,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 11:29:10,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1094, Unknown=1, NotChecked=66, Total=1260 [2023-08-30 11:29:10,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 248 [2023-08-30 11:29:10,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 163 transitions, 2251 flow. Second operand has 36 states, 36 states have (on average 83.41666666666667) internal successors, (3003), 36 states have internal predecessors, (3003), 0 states have call successors, (0), 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 11:29:10,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:10,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 248 [2023-08-30 11:29:10,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:12,296 INFO L130 PetriNetUnfolder]: 4535/8256 cut-off events. [2023-08-30 11:29:12,296 INFO L131 PetriNetUnfolder]: For 61690/62320 co-relation queries the response was YES. [2023-08-30 11:29:12,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52261 conditions, 8256 events. 4535/8256 cut-off events. For 61690/62320 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 58769 event pairs, 2428 based on Foata normal form. 632/8532 useless extension candidates. Maximal degree in co-relation 52223. Up to 4106 conditions per place. [2023-08-30 11:29:12,349 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 176 selfloop transitions, 85 changer transitions 0/263 dead transitions. [2023-08-30 11:29:12,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 263 transitions, 3942 flow [2023-08-30 11:29:12,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 11:29:12,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 11:29:12,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1908 transitions. [2023-08-30 11:29:12,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3497067448680352 [2023-08-30 11:29:12,352 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1908 transitions. [2023-08-30 11:29:12,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1908 transitions. [2023-08-30 11:29:12,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:12,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1908 transitions. [2023-08-30 11:29:12,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 86.72727272727273) internal successors, (1908), 22 states have internal predecessors, (1908), 0 states have call successors, (0), 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 11:29:12,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 248.0) internal successors, (5704), 23 states have internal predecessors, (5704), 0 states have call successors, (0), 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 11:29:12,356 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 248.0) internal successors, (5704), 23 states have internal predecessors, (5704), 0 states have call successors, (0), 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 11:29:12,356 INFO L175 Difference]: Start difference. First operand has 181 places, 163 transitions, 2251 flow. Second operand 22 states and 1908 transitions. [2023-08-30 11:29:12,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 263 transitions, 3942 flow [2023-08-30 11:29:12,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 263 transitions, 3816 flow, removed 4 selfloop flow, removed 14 redundant places. [2023-08-30 11:29:12,456 INFO L231 Difference]: Finished difference. Result has 194 places, 193 transitions, 2708 flow [2023-08-30 11:29:12,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2181, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2708, PETRI_PLACES=194, PETRI_TRANSITIONS=193} [2023-08-30 11:29:12,456 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 155 predicate places. [2023-08-30 11:29:12,456 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 193 transitions, 2708 flow [2023-08-30 11:29:12,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 83.41666666666667) internal successors, (3003), 36 states have internal predecessors, (3003), 0 states have call successors, (0), 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 11:29:12,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:12,457 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1] [2023-08-30 11:29:12,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-30 11:29:12,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:12,660 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:12,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:12,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1111908100, now seen corresponding path program 5 times [2023-08-30 11:29:12,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:12,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909136480] [2023-08-30 11:29:12,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:12,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:12,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:12,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909136480] [2023-08-30 11:29:12,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909136480] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:12,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267787767] [2023-08-30 11:29:12,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:29:12,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:12,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:12,942 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 11:29:12,943 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 11:29:13,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-30 11:29:13,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:29:13,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 11:29:13,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:13,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:29:13,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:13,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:29:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:13,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:13,452 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:13,452 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 11:29:13,456 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:13,456 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 11:29:13,465 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 11:29:13,563 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:13,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267787767] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:13,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:13,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-30 11:29:13,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324183919] [2023-08-30 11:29:13,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:13,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 11:29:13,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:13,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 11:29:13,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1146, Unknown=3, NotChecked=0, Total=1260 [2023-08-30 11:29:14,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 248 [2023-08-30 11:29:14,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 193 transitions, 2708 flow. Second operand has 36 states, 36 states have (on average 86.41666666666667) internal successors, (3111), 36 states have internal predecessors, (3111), 0 states have call successors, (0), 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 11:29:14,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:14,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 248 [2023-08-30 11:29:14,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:15,836 INFO L130 PetriNetUnfolder]: 4534/8254 cut-off events. [2023-08-30 11:29:15,836 INFO L131 PetriNetUnfolder]: For 60026/60656 co-relation queries the response was YES. [2023-08-30 11:29:15,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51780 conditions, 8254 events. 4534/8254 cut-off events. For 60026/60656 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 58680 event pairs, 2384 based on Foata normal form. 631/8397 useless extension candidates. Maximal degree in co-relation 51736. Up to 4105 conditions per place. [2023-08-30 11:29:15,894 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 201 selfloop transitions, 84 changer transitions 0/287 dead transitions. [2023-08-30 11:29:15,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 287 transitions, 4388 flow [2023-08-30 11:29:15,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 11:29:15,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 11:29:15,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2065 transitions. [2023-08-30 11:29:15,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36202664796633943 [2023-08-30 11:29:15,896 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2065 transitions. [2023-08-30 11:29:15,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2065 transitions. [2023-08-30 11:29:15,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:15,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2065 transitions. [2023-08-30 11:29:15,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 89.78260869565217) internal successors, (2065), 23 states have internal predecessors, (2065), 0 states have call successors, (0), 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 11:29:15,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 248.0) internal successors, (5952), 24 states have internal predecessors, (5952), 0 states have call successors, (0), 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 11:29:15,901 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 248.0) internal successors, (5952), 24 states have internal predecessors, (5952), 0 states have call successors, (0), 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 11:29:15,901 INFO L175 Difference]: Start difference. First operand has 194 places, 193 transitions, 2708 flow. Second operand 23 states and 2065 transitions. [2023-08-30 11:29:15,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 287 transitions, 4388 flow [2023-08-30 11:29:16,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 287 transitions, 4344 flow, removed 16 selfloop flow, removed 6 redundant places. [2023-08-30 11:29:16,020 INFO L231 Difference]: Finished difference. Result has 210 places, 191 transitions, 2803 flow [2023-08-30 11:29:16,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2635, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2803, PETRI_PLACES=210, PETRI_TRANSITIONS=191} [2023-08-30 11:29:16,020 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 171 predicate places. [2023-08-30 11:29:16,020 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 191 transitions, 2803 flow [2023-08-30 11:29:16,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 86.41666666666667) internal successors, (3111), 36 states have internal predecessors, (3111), 0 states have call successors, (0), 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 11:29:16,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:16,021 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:29:16,028 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 11:29:16,221 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,SelfDestructingSolverStorable43 [2023-08-30 11:29:16,221 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:16,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:16,222 INFO L85 PathProgramCache]: Analyzing trace with hash -2027486215, now seen corresponding path program 6 times [2023-08-30 11:29:16,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:16,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459210188] [2023-08-30 11:29:16,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:16,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:16,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:16,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459210188] [2023-08-30 11:29:16,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459210188] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:16,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189179447] [2023-08-30 11:29:16,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:29:16,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:16,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:16,349 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 11:29:16,350 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 11:29:16,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-30 11:29:16,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:29:16,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 11:29:16,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:16,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:16,769 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:16,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189179447] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:16,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:16,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-30 11:29:16,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335176346] [2023-08-30 11:29:16,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:16,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 11:29:16,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:16,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 11:29:16,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-08-30 11:29:16,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 11:29:16,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 191 transitions, 2803 flow. Second operand has 29 states, 29 states have (on average 97.51724137931035) internal successors, (2828), 29 states have internal predecessors, (2828), 0 states have call successors, (0), 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 11:29:16,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:16,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 11:29:16,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:17,993 INFO L130 PetriNetUnfolder]: 4067/7485 cut-off events. [2023-08-30 11:29:17,994 INFO L131 PetriNetUnfolder]: For 60614/60774 co-relation queries the response was YES. [2023-08-30 11:29:18,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47018 conditions, 7485 events. 4067/7485 cut-off events. For 60614/60774 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 52139 event pairs, 1718 based on Foata normal form. 356/7466 useless extension candidates. Maximal degree in co-relation 46973. Up to 4198 conditions per place. [2023-08-30 11:29:18,041 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 136 selfloop transitions, 10 changer transitions 184/332 dead transitions. [2023-08-30 11:29:18,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 332 transitions, 5589 flow [2023-08-30 11:29:18,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 11:29:18,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 11:29:18,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1434 transitions. [2023-08-30 11:29:18,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4130184331797235 [2023-08-30 11:29:18,043 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1434 transitions. [2023-08-30 11:29:18,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1434 transitions. [2023-08-30 11:29:18,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:18,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1434 transitions. [2023-08-30 11:29:18,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 102.42857142857143) internal successors, (1434), 14 states have internal predecessors, (1434), 0 states have call successors, (0), 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 11:29:18,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 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 11:29:18,046 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 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 11:29:18,046 INFO L175 Difference]: Start difference. First operand has 210 places, 191 transitions, 2803 flow. Second operand 14 states and 1434 transitions. [2023-08-30 11:29:18,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 332 transitions, 5589 flow [2023-08-30 11:29:18,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 332 transitions, 5350 flow, removed 2 selfloop flow, removed 20 redundant places. [2023-08-30 11:29:18,142 INFO L231 Difference]: Finished difference. Result has 203 places, 115 transitions, 1601 flow [2023-08-30 11:29:18,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2620, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1601, PETRI_PLACES=203, PETRI_TRANSITIONS=115} [2023-08-30 11:29:18,142 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 164 predicate places. [2023-08-30 11:29:18,142 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 115 transitions, 1601 flow [2023-08-30 11:29:18,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 97.51724137931035) internal successors, (2828), 29 states have internal predecessors, (2828), 0 states have call successors, (0), 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 11:29:18,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:18,143 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 11:29:18,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-30 11:29:18,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:18,343 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:18,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:18,343 INFO L85 PathProgramCache]: Analyzing trace with hash 7687949, now seen corresponding path program 5 times [2023-08-30 11:29:18,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:18,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581991393] [2023-08-30 11:29:18,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:18,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:18,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:18,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581991393] [2023-08-30 11:29:18,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581991393] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:18,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747055213] [2023-08-30 11:29:18,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:29:18,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:18,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:18,684 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:29:18,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-30 11:29:18,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-30 11:29:18,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:29:18,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 11:29:18,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:18,957 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 11:29:18,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:18,989 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 11:29:19,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:19,016 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 11:29:19,116 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:19,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:19,261 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1535 (Array Int Int)) (v_ArrVal_1534 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1534) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1535) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 16 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-30 11:29:19,267 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:19,268 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 11:29:19,274 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:19,274 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 11:29:19,277 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 11:29:19,291 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 11:29:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-08-30 11:29:19,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747055213] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:19,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:19,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-08-30 11:29:19,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138917554] [2023-08-30 11:29:19,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:19,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 11:29:19,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:19,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 11:29:19,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1284, Unknown=4, NotChecked=72, Total=1482 [2023-08-30 11:29:19,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:29:19,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 115 transitions, 1601 flow. Second operand has 39 states, 39 states have (on average 80.41025641025641) internal successors, (3136), 39 states have internal predecessors, (3136), 0 states have call successors, (0), 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 11:29:19,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:19,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:29:19,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:21,400 INFO L130 PetriNetUnfolder]: 3641/6569 cut-off events. [2023-08-30 11:29:21,400 INFO L131 PetriNetUnfolder]: For 53301/53726 co-relation queries the response was YES. [2023-08-30 11:29:21,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42099 conditions, 6569 events. 3641/6569 cut-off events. For 53301/53726 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 44725 event pairs, 1206 based on Foata normal form. 606/6906 useless extension candidates. Maximal degree in co-relation 42054. Up to 1905 conditions per place. [2023-08-30 11:29:21,444 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 357 selfloop transitions, 54 changer transitions 0/412 dead transitions. [2023-08-30 11:29:21,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 412 transitions, 5901 flow [2023-08-30 11:29:21,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 11:29:21,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 11:29:21,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1748 transitions. [2023-08-30 11:29:21,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3524193548387097 [2023-08-30 11:29:21,446 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1748 transitions. [2023-08-30 11:29:21,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1748 transitions. [2023-08-30 11:29:21,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:21,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1748 transitions. [2023-08-30 11:29:21,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 87.4) internal successors, (1748), 20 states have internal predecessors, (1748), 0 states have call successors, (0), 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 11:29:21,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 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 11:29:21,450 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 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 11:29:21,450 INFO L175 Difference]: Start difference. First operand has 203 places, 115 transitions, 1601 flow. Second operand 20 states and 1748 transitions. [2023-08-30 11:29:21,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 412 transitions, 5901 flow [2023-08-30 11:29:21,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 412 transitions, 5238 flow, removed 31 selfloop flow, removed 36 redundant places. [2023-08-30 11:29:21,584 INFO L231 Difference]: Finished difference. Result has 164 places, 121 transitions, 1558 flow [2023-08-30 11:29:21,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1558, PETRI_PLACES=164, PETRI_TRANSITIONS=121} [2023-08-30 11:29:21,584 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 125 predicate places. [2023-08-30 11:29:21,584 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 121 transitions, 1558 flow [2023-08-30 11:29:21,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 80.41025641025641) internal successors, (3136), 39 states have internal predecessors, (3136), 0 states have call successors, (0), 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 11:29:21,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:21,585 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 11:29:21,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-30 11:29:21,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-30 11:29:21,789 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:21,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:21,789 INFO L85 PathProgramCache]: Analyzing trace with hash 7687948, now seen corresponding path program 4 times [2023-08-30 11:29:21,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:21,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595252351] [2023-08-30 11:29:21,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:21,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:22,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:22,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595252351] [2023-08-30 11:29:22,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595252351] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:22,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968873309] [2023-08-30 11:29:22,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:29:22,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:22,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:22,140 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:29:22,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-30 11:29:22,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:29:22,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:29:22,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 11:29:22,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:22,436 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 11:29:22,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:22,487 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 11:29:22,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:22,515 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 11:29:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:22,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:22,735 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1585 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1585) c_~A~0.base) (+ c_~A~0.offset 16)) 9223372039002259456))) is different from false [2023-08-30 11:29:22,741 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1585 (Array Int Int)) (v_ArrVal_1584 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1584) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1585) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 16 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2023-08-30 11:29:22,748 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:22,748 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 11:29:22,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:22,754 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 11:29:22,757 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 11:29:22,760 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 11:29:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-08-30 11:29:22,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968873309] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:22,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:22,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-08-30 11:29:22,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664356019] [2023-08-30 11:29:22,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:22,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 11:29:22,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:22,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 11:29:22,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1218, Unknown=2, NotChecked=142, Total=1482 [2023-08-30 11:29:22,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:29:22,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 121 transitions, 1558 flow. Second operand has 39 states, 39 states have (on average 80.41025641025641) internal successors, (3136), 39 states have internal predecessors, (3136), 0 states have call successors, (0), 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 11:29:22,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:22,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:29:22,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:24,880 INFO L130 PetriNetUnfolder]: 3535/6393 cut-off events. [2023-08-30 11:29:24,880 INFO L131 PetriNetUnfolder]: For 41984/42389 co-relation queries the response was YES. [2023-08-30 11:29:24,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39174 conditions, 6393 events. 3535/6393 cut-off events. For 41984/42389 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 43219 event pairs, 1278 based on Foata normal form. 476/6448 useless extension candidates. Maximal degree in co-relation 39143. Up to 1879 conditions per place. [2023-08-30 11:29:24,917 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 356 selfloop transitions, 54 changer transitions 0/411 dead transitions. [2023-08-30 11:29:24,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 411 transitions, 5375 flow [2023-08-30 11:29:24,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 11:29:24,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 11:29:24,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1745 transitions. [2023-08-30 11:29:24,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35181451612903225 [2023-08-30 11:29:24,919 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1745 transitions. [2023-08-30 11:29:24,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1745 transitions. [2023-08-30 11:29:24,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:24,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1745 transitions. [2023-08-30 11:29:24,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 87.25) internal successors, (1745), 20 states have internal predecessors, (1745), 0 states have call successors, (0), 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 11:29:24,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 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 11:29:24,923 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 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 11:29:24,923 INFO L175 Difference]: Start difference. First operand has 164 places, 121 transitions, 1558 flow. Second operand 20 states and 1745 transitions. [2023-08-30 11:29:24,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 411 transitions, 5375 flow [2023-08-30 11:29:24,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 411 transitions, 5189 flow, removed 3 selfloop flow, removed 19 redundant places. [2023-08-30 11:29:24,964 INFO L231 Difference]: Finished difference. Result has 164 places, 120 transitions, 1470 flow [2023-08-30 11:29:24,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1362, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1470, PETRI_PLACES=164, PETRI_TRANSITIONS=120} [2023-08-30 11:29:24,965 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 125 predicate places. [2023-08-30 11:29:24,965 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 120 transitions, 1470 flow [2023-08-30 11:29:24,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 80.41025641025641) internal successors, (3136), 39 states have internal predecessors, (3136), 0 states have call successors, (0), 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 11:29:24,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:24,965 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1] [2023-08-30 11:29:24,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-30 11:29:25,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-30 11:29:25,166 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:25,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:25,166 INFO L85 PathProgramCache]: Analyzing trace with hash -903153165, now seen corresponding path program 7 times [2023-08-30 11:29:25,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:25,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041321464] [2023-08-30 11:29:25,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:25,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:25,300 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:25,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:25,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041321464] [2023-08-30 11:29:25,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041321464] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:25,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421799523] [2023-08-30 11:29:25,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:29:25,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:25,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:25,301 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:29:25,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-30 11:29:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:25,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 11:29:25,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:25,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:25,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421799523] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:25,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:25,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2023-08-30 11:29:25,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130784062] [2023-08-30 11:29:25,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:25,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 11:29:25,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:25,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 11:29:25,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=836, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 11:29:26,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 11:29:26,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 120 transitions, 1470 flow. Second operand has 34 states, 34 states have (on average 97.44117647058823) internal successors, (3313), 34 states have internal predecessors, (3313), 0 states have call successors, (0), 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 11:29:26,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:26,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 11:29:26,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:27,481 INFO L130 PetriNetUnfolder]: 6218/11302 cut-off events. [2023-08-30 11:29:27,481 INFO L131 PetriNetUnfolder]: For 69433/70193 co-relation queries the response was YES. [2023-08-30 11:29:27,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66360 conditions, 11302 events. 6218/11302 cut-off events. For 69433/70193 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 85496 event pairs, 2410 based on Foata normal form. 976/11617 useless extension candidates. Maximal degree in co-relation 66331. Up to 3796 conditions per place. [2023-08-30 11:29:27,549 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 424 selfloop transitions, 51 changer transitions 52/528 dead transitions. [2023-08-30 11:29:27,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 528 transitions, 6868 flow [2023-08-30 11:29:27,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 11:29:27,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 11:29:27,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2210 transitions. [2023-08-30 11:29:27,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42434715821812596 [2023-08-30 11:29:27,552 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2210 transitions. [2023-08-30 11:29:27,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2210 transitions. [2023-08-30 11:29:27,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:27,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2210 transitions. [2023-08-30 11:29:27,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 105.23809523809524) internal successors, (2210), 21 states have internal predecessors, (2210), 0 states have call successors, (0), 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 11:29:27,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 248.0) internal successors, (5456), 22 states have internal predecessors, (5456), 0 states have call successors, (0), 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 11:29:27,556 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 248.0) internal successors, (5456), 22 states have internal predecessors, (5456), 0 states have call successors, (0), 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 11:29:27,556 INFO L175 Difference]: Start difference. First operand has 164 places, 120 transitions, 1470 flow. Second operand 21 states and 2210 transitions. [2023-08-30 11:29:27,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 528 transitions, 6868 flow [2023-08-30 11:29:27,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 528 transitions, 6707 flow, removed 1 selfloop flow, removed 17 redundant places. [2023-08-30 11:29:27,617 INFO L231 Difference]: Finished difference. Result has 175 places, 163 transitions, 2202 flow [2023-08-30 11:29:27,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2202, PETRI_PLACES=175, PETRI_TRANSITIONS=163} [2023-08-30 11:29:27,617 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 136 predicate places. [2023-08-30 11:29:27,617 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 163 transitions, 2202 flow [2023-08-30 11:29:27,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 97.44117647058823) internal successors, (3313), 34 states have internal predecessors, (3313), 0 states have call successors, (0), 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 11:29:27,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:27,618 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:29:27,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-30 11:29:27,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-30 11:29:27,818 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:27,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:27,819 INFO L85 PathProgramCache]: Analyzing trace with hash -2015422618, now seen corresponding path program 4 times [2023-08-30 11:29:27,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:27,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077180808] [2023-08-30 11:29:27,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:27,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:28,154 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:28,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:28,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077180808] [2023-08-30 11:29:28,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077180808] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:28,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664864749] [2023-08-30 11:29:28,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:29:28,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:28,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:28,155 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:29:28,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-30 11:29:28,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:29:28,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:29:28,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 11:29:28,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:28,425 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 11:29:28,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:28,452 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 11:29:28,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:28,479 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 11:29:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:28,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:28,763 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1677 (Array Int Int))) (< 0 (+ 4294967296 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1677) c_~A~0.base) (+ c_~A~0.offset 16))))) is different from false [2023-08-30 11:29:28,823 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:28,823 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 11:29:28,828 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:28,828 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 159 treesize of output 147 [2023-08-30 11:29:28,832 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 29 treesize of output 25 [2023-08-30 11:29:28,847 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 20 [2023-08-30 11:29:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:28,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664864749] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:28,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:28,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-30 11:29:28,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457432742] [2023-08-30 11:29:28,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:28,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 11:29:28,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:28,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 11:29:28,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1430, Unknown=11, NotChecked=76, Total=1640 [2023-08-30 11:29:29,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:29:29,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 163 transitions, 2202 flow. Second operand has 41 states, 41 states have (on average 80.46341463414635) internal successors, (3299), 41 states have internal predecessors, (3299), 0 states have call successors, (0), 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 11:29:29,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:29,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:29:29,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:31,974 INFO L130 PetriNetUnfolder]: 7683/13969 cut-off events. [2023-08-30 11:29:31,975 INFO L131 PetriNetUnfolder]: For 91834/92022 co-relation queries the response was YES. [2023-08-30 11:29:32,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83160 conditions, 13969 events. 7683/13969 cut-off events. For 91834/92022 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 106686 event pairs, 1360 based on Foata normal form. 732/14016 useless extension candidates. Maximal degree in co-relation 83123. Up to 3806 conditions per place. [2023-08-30 11:29:32,060 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 693 selfloop transitions, 29 changer transitions 0/726 dead transitions. [2023-08-30 11:29:32,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 726 transitions, 12629 flow [2023-08-30 11:29:32,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 11:29:32,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 11:29:32,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1738 transitions. [2023-08-30 11:29:32,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3504032258064516 [2023-08-30 11:29:32,062 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1738 transitions. [2023-08-30 11:29:32,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1738 transitions. [2023-08-30 11:29:32,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:32,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1738 transitions. [2023-08-30 11:29:32,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 86.9) internal successors, (1738), 20 states have internal predecessors, (1738), 0 states have call successors, (0), 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 11:29:32,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 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 11:29:32,067 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 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 11:29:32,067 INFO L175 Difference]: Start difference. First operand has 175 places, 163 transitions, 2202 flow. Second operand 20 states and 1738 transitions. [2023-08-30 11:29:32,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 726 transitions, 12629 flow [2023-08-30 11:29:32,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 726 transitions, 12613 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-30 11:29:32,190 INFO L231 Difference]: Finished difference. Result has 191 places, 167 transitions, 2318 flow [2023-08-30 11:29:32,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2318, PETRI_PLACES=191, PETRI_TRANSITIONS=167} [2023-08-30 11:29:32,191 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 152 predicate places. [2023-08-30 11:29:32,191 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 167 transitions, 2318 flow [2023-08-30 11:29:32,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 80.46341463414635) internal successors, (3299), 41 states have internal predecessors, (3299), 0 states have call successors, (0), 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 11:29:32,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:32,192 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:29:32,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-30 11:29:32,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-30 11:29:32,397 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:32,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:32,397 INFO L85 PathProgramCache]: Analyzing trace with hash -2015422619, now seen corresponding path program 7 times [2023-08-30 11:29:32,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:32,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130290584] [2023-08-30 11:29:32,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:32,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:32,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:32,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130290584] [2023-08-30 11:29:32,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130290584] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:32,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043022555] [2023-08-30 11:29:32,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:29:32,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:32,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:32,718 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:29:32,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-30 11:29:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:32,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 11:29:32,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:32,985 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 11:29:33,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:33,021 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 11:29:33,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:33,048 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 16 treesize of output 18 [2023-08-30 11:29:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:33,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:33,324 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1727 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1727) c_~A~0.base) (+ c_~A~0.offset 16)) 9223372039002259456)) is different from false [2023-08-30 11:29:33,381 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:33,382 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 11:29:33,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:33,387 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 71 treesize of output 65 [2023-08-30 11:29:33,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-08-30 11:29:33,392 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 11:29:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:33,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043022555] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:33,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:33,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-30 11:29:33,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017579947] [2023-08-30 11:29:33,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:33,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 11:29:33,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:33,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 11:29:33,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1432, Unknown=9, NotChecked=76, Total=1640 [2023-08-30 11:29:33,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:29:33,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 167 transitions, 2318 flow. Second operand has 41 states, 41 states have (on average 80.46341463414635) internal successors, (3299), 41 states have internal predecessors, (3299), 0 states have call successors, (0), 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 11:29:33,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:33,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:29:33,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:36,734 INFO L130 PetriNetUnfolder]: 7347/13361 cut-off events. [2023-08-30 11:29:36,735 INFO L131 PetriNetUnfolder]: For 93610/93790 co-relation queries the response was YES. [2023-08-30 11:29:36,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85311 conditions, 13361 events. 7347/13361 cut-off events. For 93610/93790 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 101172 event pairs, 1270 based on Foata normal form. 452/13406 useless extension candidates. Maximal degree in co-relation 85271. Up to 3732 conditions per place. [2023-08-30 11:29:36,830 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 692 selfloop transitions, 29 changer transitions 0/725 dead transitions. [2023-08-30 11:29:36,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 725 transitions, 12686 flow [2023-08-30 11:29:36,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 11:29:36,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 11:29:36,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1735 transitions. [2023-08-30 11:29:36,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3497983870967742 [2023-08-30 11:29:36,832 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1735 transitions. [2023-08-30 11:29:36,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1735 transitions. [2023-08-30 11:29:36,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:36,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1735 transitions. [2023-08-30 11:29:36,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 86.75) internal successors, (1735), 20 states have internal predecessors, (1735), 0 states have call successors, (0), 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 11:29:36,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 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 11:29:36,836 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 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 11:29:36,836 INFO L175 Difference]: Start difference. First operand has 191 places, 167 transitions, 2318 flow. Second operand 20 states and 1735 transitions. [2023-08-30 11:29:36,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 725 transitions, 12686 flow [2023-08-30 11:29:36,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 725 transitions, 12609 flow, removed 1 selfloop flow, removed 17 redundant places. [2023-08-30 11:29:36,973 INFO L231 Difference]: Finished difference. Result has 193 places, 166 transitions, 2289 flow [2023-08-30 11:29:36,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2231, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2289, PETRI_PLACES=193, PETRI_TRANSITIONS=166} [2023-08-30 11:29:36,974 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 154 predicate places. [2023-08-30 11:29:36,974 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 166 transitions, 2289 flow [2023-08-30 11:29:36,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 80.46341463414635) internal successors, (3299), 41 states have internal predecessors, (3299), 0 states have call successors, (0), 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 11:29:36,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:36,974 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1] [2023-08-30 11:29:36,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-30 11:29:37,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-30 11:29:37,175 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:37,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:37,175 INFO L85 PathProgramCache]: Analyzing trace with hash -529181690, now seen corresponding path program 6 times [2023-08-30 11:29:37,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:37,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120635525] [2023-08-30 11:29:37,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:37,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:37,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:37,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120635525] [2023-08-30 11:29:37,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120635525] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:37,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793874371] [2023-08-30 11:29:37,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:29:37,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:37,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:37,506 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:29:37,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-30 11:29:37,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-08-30 11:29:37,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:29:37,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 11:29:37,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:37,885 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 11:29:37,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:37,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:29:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:38,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:38,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:38,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2023-08-30 11:29:38,545 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:38,546 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 47 treesize of output 39 [2023-08-30 11:29:38,549 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 11:29:38,934 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:38,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793874371] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:38,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:38,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-08-30 11:29:38,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588002875] [2023-08-30 11:29:38,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:38,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 11:29:38,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:38,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 11:29:38,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2023-08-30 11:29:43,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 248 [2023-08-30 11:29:43,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 166 transitions, 2289 flow. Second operand has 44 states, 44 states have (on average 87.43181818181819) internal successors, (3847), 44 states have internal predecessors, (3847), 0 states have call successors, (0), 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 11:29:43,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:43,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 248 [2023-08-30 11:29:43,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:46,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 11:29:55,616 INFO L130 PetriNetUnfolder]: 11745/20446 cut-off events. [2023-08-30 11:29:55,617 INFO L131 PetriNetUnfolder]: For 146089/147189 co-relation queries the response was YES. [2023-08-30 11:29:55,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133068 conditions, 20446 events. 11745/20446 cut-off events. For 146089/147189 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 159023 event pairs, 2846 based on Foata normal form. 1188/20972 useless extension candidates. Maximal degree in co-relation 133029. Up to 5841 conditions per place. [2023-08-30 11:29:55,745 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 805 selfloop transitions, 276 changer transitions 52/1134 dead transitions. [2023-08-30 11:29:55,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 1134 transitions, 16181 flow [2023-08-30 11:29:55,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-08-30 11:29:55,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2023-08-30 11:29:55,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 9643 transitions. [2023-08-30 11:29:55,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36682136335970783 [2023-08-30 11:29:55,753 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 9643 transitions. [2023-08-30 11:29:55,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 9643 transitions. [2023-08-30 11:29:55,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:55,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 9643 transitions. [2023-08-30 11:29:55,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 90.97169811320755) internal successors, (9643), 106 states have internal predecessors, (9643), 0 states have call successors, (0), 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 11:29:55,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 248.0) internal successors, (26536), 107 states have internal predecessors, (26536), 0 states have call successors, (0), 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 11:29:55,772 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 248.0) internal successors, (26536), 107 states have internal predecessors, (26536), 0 states have call successors, (0), 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 11:29:55,772 INFO L175 Difference]: Start difference. First operand has 193 places, 166 transitions, 2289 flow. Second operand 106 states and 9643 transitions. [2023-08-30 11:29:55,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 1134 transitions, 16181 flow [2023-08-30 11:29:56,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 1134 transitions, 15393 flow, removed 27 selfloop flow, removed 17 redundant places. [2023-08-30 11:29:56,047 INFO L231 Difference]: Finished difference. Result has 294 places, 350 transitions, 5218 flow [2023-08-30 11:29:56,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2239, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=5218, PETRI_PLACES=294, PETRI_TRANSITIONS=350} [2023-08-30 11:29:56,048 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 255 predicate places. [2023-08-30 11:29:56,048 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 350 transitions, 5218 flow [2023-08-30 11:29:56,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 87.43181818181819) internal successors, (3847), 44 states have internal predecessors, (3847), 0 states have call successors, (0), 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 11:29:56,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:56,049 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1] [2023-08-30 11:29:56,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-30 11:29:56,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:56,254 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:56,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:56,254 INFO L85 PathProgramCache]: Analyzing trace with hash -529181689, now seen corresponding path program 8 times [2023-08-30 11:29:56,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:56,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469546923] [2023-08-30 11:29:56,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:56,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:56,698 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:56,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:56,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469546923] [2023-08-30 11:29:56,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469546923] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:56,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463922725] [2023-08-30 11:29:56,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:29:56,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:56,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:56,700 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:29:56,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-30 11:29:56,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:29:56,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:29:56,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 11:29:56,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:57,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 11:29:57,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:57,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:29:57,357 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:57,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:57,684 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:57,684 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 11:29:57,691 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:57,691 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 41 treesize of output 33 [2023-08-30 11:29:57,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-08-30 11:29:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:58,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463922725] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:58,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:58,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-08-30 11:29:58,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056621278] [2023-08-30 11:29:58,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:58,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 11:29:58,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:58,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 11:29:58,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2023-08-30 11:30:01,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 248 [2023-08-30 11:30:01,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 350 transitions, 5218 flow. Second operand has 44 states, 44 states have (on average 88.43181818181819) internal successors, (3891), 44 states have internal predecessors, (3891), 0 states have call successors, (0), 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 11:30:01,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:01,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 248 [2023-08-30 11:30:01,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:07,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 11:30:12,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 11:30:14,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 11:30:19,068 INFO L130 PetriNetUnfolder]: 11635/20288 cut-off events. [2023-08-30 11:30:19,068 INFO L131 PetriNetUnfolder]: For 172162/173257 co-relation queries the response was YES. [2023-08-30 11:30:19,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136268 conditions, 20288 events. 11635/20288 cut-off events. For 172162/173257 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 158000 event pairs, 2845 based on Foata normal form. 1183/20671 useless extension candidates. Maximal degree in co-relation 136216. Up to 5825 conditions per place. [2023-08-30 11:30:19,216 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 801 selfloop transitions, 272 changer transitions 52/1126 dead transitions. [2023-08-30 11:30:19,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 1126 transitions, 16038 flow [2023-08-30 11:30:19,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-08-30 11:30:19,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2023-08-30 11:30:19,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 9742 transitions. [2023-08-30 11:30:19,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37058734023128426 [2023-08-30 11:30:19,222 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 9742 transitions. [2023-08-30 11:30:19,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 9742 transitions. [2023-08-30 11:30:19,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:19,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 9742 transitions. [2023-08-30 11:30:19,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 91.90566037735849) internal successors, (9742), 106 states have internal predecessors, (9742), 0 states have call successors, (0), 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 11:30:19,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 248.0) internal successors, (26536), 107 states have internal predecessors, (26536), 0 states have call successors, (0), 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 11:30:19,241 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 248.0) internal successors, (26536), 107 states have internal predecessors, (26536), 0 states have call successors, (0), 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 11:30:19,241 INFO L175 Difference]: Start difference. First operand has 294 places, 350 transitions, 5218 flow. Second operand 106 states and 9742 transitions. [2023-08-30 11:30:19,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 1126 transitions, 16038 flow [2023-08-30 11:30:19,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1126 transitions, 15623 flow, removed 87 selfloop flow, removed 24 redundant places. [2023-08-30 11:30:19,881 INFO L231 Difference]: Finished difference. Result has 375 places, 345 transitions, 5254 flow [2023-08-30 11:30:19,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=4696, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=5254, PETRI_PLACES=375, PETRI_TRANSITIONS=345} [2023-08-30 11:30:19,881 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 336 predicate places. [2023-08-30 11:30:19,881 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 345 transitions, 5254 flow [2023-08-30 11:30:19,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 88.43181818181819) internal successors, (3891), 44 states have internal predecessors, (3891), 0 states have call successors, (0), 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 11:30:19,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:19,882 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:30:19,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-30 11:30:20,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-08-30 11:30:20,082 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:30:20,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:20,083 INFO L85 PathProgramCache]: Analyzing trace with hash 209139757, now seen corresponding path program 8 times [2023-08-30 11:30:20,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:20,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222669802] [2023-08-30 11:30:20,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:20,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:20,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:20,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222669802] [2023-08-30 11:30:20,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222669802] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:30:20,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364414881] [2023-08-30 11:30:20,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:30:20,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:20,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:30:20,235 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:30:20,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-30 11:30:20,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:30:20,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:30:20,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 11:30:20,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:30:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:20,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:30:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:20,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364414881] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:30:20,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:30:20,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2023-08-30 11:30:20,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120478100] [2023-08-30 11:30:20,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:30:20,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 11:30:20,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:20,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 11:30:20,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=841, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 11:30:21,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 11:30:21,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 345 transitions, 5254 flow. Second operand has 34 states, 34 states have (on average 97.5) internal successors, (3315), 34 states have internal predecessors, (3315), 0 states have call successors, (0), 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 11:30:21,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:21,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 11:30:21,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:23,928 INFO L130 PetriNetUnfolder]: 10665/18697 cut-off events. [2023-08-30 11:30:23,928 INFO L131 PetriNetUnfolder]: For 189209/189425 co-relation queries the response was YES. [2023-08-30 11:30:24,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127682 conditions, 18697 events. 10665/18697 cut-off events. For 189209/189425 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 140854 event pairs, 3717 based on Foata normal form. 666/18719 useless extension candidates. Maximal degree in co-relation 127633. Up to 9553 conditions per place. [2023-08-30 11:30:24,053 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 312 selfloop transitions, 11 changer transitions 581/908 dead transitions. [2023-08-30 11:30:24,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 908 transitions, 16869 flow [2023-08-30 11:30:24,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 11:30:24,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 11:30:24,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2152 transitions. [2023-08-30 11:30:24,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41321044546851 [2023-08-30 11:30:24,055 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2152 transitions. [2023-08-30 11:30:24,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2152 transitions. [2023-08-30 11:30:24,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:24,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2152 transitions. [2023-08-30 11:30:24,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 102.47619047619048) internal successors, (2152), 21 states have internal predecessors, (2152), 0 states have call successors, (0), 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 11:30:24,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 248.0) internal successors, (5456), 22 states have internal predecessors, (5456), 0 states have call successors, (0), 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 11:30:24,059 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 248.0) internal successors, (5456), 22 states have internal predecessors, (5456), 0 states have call successors, (0), 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 11:30:24,059 INFO L175 Difference]: Start difference. First operand has 375 places, 345 transitions, 5254 flow. Second operand 21 states and 2152 transitions. [2023-08-30 11:30:24,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 908 transitions, 16869 flow [2023-08-30 11:30:24,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 908 transitions, 15719 flow, removed 4 selfloop flow, removed 96 redundant places. [2023-08-30 11:30:24,493 INFO L231 Difference]: Finished difference. Result has 306 places, 257 transitions, 3564 flow [2023-08-30 11:30:24,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=4847, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3564, PETRI_PLACES=306, PETRI_TRANSITIONS=257} [2023-08-30 11:30:24,493 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 267 predicate places. [2023-08-30 11:30:24,493 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 257 transitions, 3564 flow [2023-08-30 11:30:24,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 97.5) internal successors, (3315), 34 states have internal predecessors, (3315), 0 states have call successors, (0), 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 11:30:24,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:24,494 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 11:30:24,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-30 11:30:24,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:24,694 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:30:24,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:24,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1801384039, now seen corresponding path program 6 times [2023-08-30 11:30:24,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:24,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044579111] [2023-08-30 11:30:24,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:24,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:25,274 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:25,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:25,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044579111] [2023-08-30 11:30:25,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044579111] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:30:25,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858208497] [2023-08-30 11:30:25,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:30:25,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:25,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:30:25,276 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:30:25,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-30 11:30:25,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-08-30 11:30:25,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:30:25,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 11:30:25,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:30:25,730 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 11:30:25,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:30:25,771 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 11:30:25,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:30:25,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:30:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:25,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:30:26,198 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1925 (Array Int Int)) (v_ArrVal_1924 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1924) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1925) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 20 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-30 11:30:26,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:26,205 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 11:30:26,211 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:26,211 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 11:30:26,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 11:30:26,232 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 11:30:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-08-30 11:30:26,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858208497] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:30:26,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:30:26,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-30 11:30:26,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263683811] [2023-08-30 11:30:26,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:30:26,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 11:30:26,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:26,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 11:30:26,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1746, Unknown=7, NotChecked=84, Total=1980 [2023-08-30 11:30:26,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:30:26,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 257 transitions, 3564 flow. Second operand has 45 states, 45 states have (on average 80.42222222222222) internal successors, (3619), 45 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:26,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:26,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:30:26,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:30,536 INFO L130 PetriNetUnfolder]: 8302/14516 cut-off events. [2023-08-30 11:30:30,536 INFO L131 PetriNetUnfolder]: For 166489/167269 co-relation queries the response was YES. [2023-08-30 11:30:30,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103537 conditions, 14516 events. 8302/14516 cut-off events. For 166489/167269 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 105522 event pairs, 2548 based on Foata normal form. 1463/15693 useless extension candidates. Maximal degree in co-relation 103482. Up to 4311 conditions per place. [2023-08-30 11:30:30,641 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 529 selfloop transitions, 123 changer transitions 0/653 dead transitions. [2023-08-30 11:30:30,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 653 transitions, 9799 flow [2023-08-30 11:30:30,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 11:30:30,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 11:30:30,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2011 transitions. [2023-08-30 11:30:30,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35255960729312763 [2023-08-30 11:30:30,643 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2011 transitions. [2023-08-30 11:30:30,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2011 transitions. [2023-08-30 11:30:30,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:30,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2011 transitions. [2023-08-30 11:30:30,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 87.43478260869566) internal successors, (2011), 23 states have internal predecessors, (2011), 0 states have call successors, (0), 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 11:30:30,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 248.0) internal successors, (5952), 24 states have internal predecessors, (5952), 0 states have call successors, (0), 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 11:30:30,647 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 248.0) internal successors, (5952), 24 states have internal predecessors, (5952), 0 states have call successors, (0), 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 11:30:30,647 INFO L175 Difference]: Start difference. First operand has 306 places, 257 transitions, 3564 flow. Second operand 23 states and 2011 transitions. [2023-08-30 11:30:30,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 653 transitions, 9799 flow [2023-08-30 11:30:31,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 653 transitions, 9310 flow, removed 191 selfloop flow, removed 22 redundant places. [2023-08-30 11:30:31,530 INFO L231 Difference]: Finished difference. Result has 255 places, 271 transitions, 4053 flow [2023-08-30 11:30:31,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=3438, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4053, PETRI_PLACES=255, PETRI_TRANSITIONS=271} [2023-08-30 11:30:31,531 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 216 predicate places. [2023-08-30 11:30:31,531 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 271 transitions, 4053 flow [2023-08-30 11:30:31,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 80.42222222222222) internal successors, (3619), 45 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:31,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:31,532 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 11:30:31,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-30 11:30:31,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-08-30 11:30:31,732 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:30:31,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:31,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1801384038, now seen corresponding path program 5 times [2023-08-30 11:30:31,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:31,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671934002] [2023-08-30 11:30:31,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:31,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:32,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:32,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671934002] [2023-08-30 11:30:32,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671934002] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:30:32,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740471247] [2023-08-30 11:30:32,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:30:32,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:32,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:30:32,212 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:30:32,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-30 11:30:32,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-30 11:30:32,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:30:32,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 11:30:32,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:30:32,611 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 11:30:32,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:30:32,657 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 11:30:32,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:30:32,691 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 11:30:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:32,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:30:33,040 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1979 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1979) c_~A~0.base) (+ c_~A~0.offset 20)) 9223372039002259456))) is different from false [2023-08-30 11:30:33,046 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1978 (Array Int Int)) (v_ArrVal_1979 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1978) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1979) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 20 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2023-08-30 11:30:33,053 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:33,053 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 11:30:33,059 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:33,059 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 11:30:33,068 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 11:30:33,073 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 11:30:33,311 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-08-30 11:30:33,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740471247] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:30:33,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:30:33,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-30 11:30:33,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567746243] [2023-08-30 11:30:33,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:30:33,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 11:30:33,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:33,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 11:30:33,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1672, Unknown=2, NotChecked=166, Total=1980 [2023-08-30 11:30:33,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:30:33,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 271 transitions, 4053 flow. Second operand has 45 states, 45 states have (on average 80.42222222222222) internal successors, (3619), 45 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:33,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:33,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:30:33,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:37,224 INFO L130 PetriNetUnfolder]: 8054/14102 cut-off events. [2023-08-30 11:30:37,224 INFO L131 PetriNetUnfolder]: For 143352/144107 co-relation queries the response was YES. [2023-08-30 11:30:37,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101582 conditions, 14102 events. 8054/14102 cut-off events. For 143352/144107 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 102183 event pairs, 2481 based on Foata normal form. 921/14465 useless extension candidates. Maximal degree in co-relation 101540. Up to 4249 conditions per place. [2023-08-30 11:30:37,330 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 527 selfloop transitions, 123 changer transitions 0/651 dead transitions. [2023-08-30 11:30:37,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 651 transitions, 9610 flow [2023-08-30 11:30:37,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 11:30:37,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 11:30:37,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2008 transitions. [2023-08-30 11:30:37,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3520336605890603 [2023-08-30 11:30:37,332 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2008 transitions. [2023-08-30 11:30:37,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2008 transitions. [2023-08-30 11:30:37,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:37,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2008 transitions. [2023-08-30 11:30:37,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 87.30434782608695) internal successors, (2008), 23 states have internal predecessors, (2008), 0 states have call successors, (0), 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 11:30:37,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 248.0) internal successors, (5952), 24 states have internal predecessors, (5952), 0 states have call successors, (0), 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 11:30:37,336 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 248.0) internal successors, (5952), 24 states have internal predecessors, (5952), 0 states have call successors, (0), 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 11:30:37,336 INFO L175 Difference]: Start difference. First operand has 255 places, 271 transitions, 4053 flow. Second operand 23 states and 2008 transitions. [2023-08-30 11:30:37,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 651 transitions, 9610 flow [2023-08-30 11:30:37,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 651 transitions, 9215 flow, removed 2 selfloop flow, removed 21 redundant places. [2023-08-30 11:30:37,681 INFO L231 Difference]: Finished difference. Result has 256 places, 269 transitions, 3872 flow [2023-08-30 11:30:37,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=3626, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3872, PETRI_PLACES=256, PETRI_TRANSITIONS=269} [2023-08-30 11:30:37,681 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 217 predicate places. [2023-08-30 11:30:37,681 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 269 transitions, 3872 flow [2023-08-30 11:30:37,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 80.42222222222222) internal successors, (3619), 45 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:37,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:37,682 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:30:37,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-30 11:30:37,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:37,882 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:30:37,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:37,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1181524671, now seen corresponding path program 9 times [2023-08-30 11:30:37,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:37,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010327491] [2023-08-30 11:30:37,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:37,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:38,282 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:38,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:38,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010327491] [2023-08-30 11:30:38,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010327491] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:30:38,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620936069] [2023-08-30 11:30:38,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:30:38,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:38,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:30:38,283 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:30:38,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-30 11:30:38,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 11:30:38,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:30:38,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 11:30:38,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:30:38,983 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 11:30:39,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:30:39,019 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 11:30:39,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:30:39,053 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 11:30:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:39,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:30:39,478 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:39,478 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 11:30:39,484 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:39,484 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 71 treesize of output 65 [2023-08-30 11:30:39,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-08-30 11:30:39,490 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 11:30:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:39,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620936069] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:30:39,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:30:39,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-30 11:30:39,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445763136] [2023-08-30 11:30:39,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:30:39,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 11:30:39,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:39,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 11:30:39,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1825, Unknown=11, NotChecked=0, Total=1980 [2023-08-30 11:30:40,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:30:40,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 269 transitions, 3872 flow. Second operand has 45 states, 45 states have (on average 80.46666666666667) internal successors, (3621), 45 states have internal predecessors, (3621), 0 states have call successors, (0), 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 11:30:40,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:40,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:30:40,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:44,512 INFO L130 PetriNetUnfolder]: 9757/17070 cut-off events. [2023-08-30 11:30:44,512 INFO L131 PetriNetUnfolder]: For 185681/185681 co-relation queries the response was YES. [2023-08-30 11:30:44,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120086 conditions, 17070 events. 9757/17070 cut-off events. For 185681/185681 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 125091 event pairs, 1476 based on Foata normal form. 556/17070 useless extension candidates. Maximal degree in co-relation 120045. Up to 4987 conditions per place. [2023-08-30 11:30:44,623 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 1144 selfloop transitions, 34 changer transitions 0/1182 dead transitions. [2023-08-30 11:30:44,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 1182 transitions, 23533 flow [2023-08-30 11:30:44,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 11:30:44,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 11:30:44,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1999 transitions. [2023-08-30 11:30:44,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35045582047685836 [2023-08-30 11:30:44,625 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1999 transitions. [2023-08-30 11:30:44,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1999 transitions. [2023-08-30 11:30:44,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:44,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1999 transitions. [2023-08-30 11:30:44,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 86.91304347826087) internal successors, (1999), 23 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:44,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 248.0) internal successors, (5952), 24 states have internal predecessors, (5952), 0 states have call successors, (0), 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 11:30:44,628 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 248.0) internal successors, (5952), 24 states have internal predecessors, (5952), 0 states have call successors, (0), 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 11:30:44,629 INFO L175 Difference]: Start difference. First operand has 256 places, 269 transitions, 3872 flow. Second operand 23 states and 1999 transitions. [2023-08-30 11:30:44,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 1182 transitions, 23533 flow [2023-08-30 11:30:45,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 1182 transitions, 22233 flow, removed 28 selfloop flow, removed 20 redundant places. [2023-08-30 11:30:45,023 INFO L231 Difference]: Finished difference. Result has 260 places, 273 transitions, 3810 flow [2023-08-30 11:30:45,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=3663, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3810, PETRI_PLACES=260, PETRI_TRANSITIONS=273} [2023-08-30 11:30:45,023 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 221 predicate places. [2023-08-30 11:30:45,024 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 273 transitions, 3810 flow [2023-08-30 11:30:45,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 80.46666666666667) internal successors, (3621), 45 states have internal predecessors, (3621), 0 states have call successors, (0), 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 11:30:45,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:45,024 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:30:45,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-30 11:30:45,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:45,230 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:30:45,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:45,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1181524670, now seen corresponding path program 5 times [2023-08-30 11:30:45,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:45,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913931189] [2023-08-30 11:30:45,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:45,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:45,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:45,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913931189] [2023-08-30 11:30:45,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913931189] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:30:45,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966725161] [2023-08-30 11:30:45,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:30:45,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:45,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:30:45,737 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:30:45,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-30 11:30:45,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-30 11:30:45,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:30:45,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 11:30:45,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:30:46,134 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 11:30:46,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:30:46,174 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 11:30:46,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:30:46,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:30:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:46,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:30:46,538 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2087 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2087) c_~A~0.base) (+ c_~A~0.offset 20)) 4294967296))) is different from false [2023-08-30 11:30:46,598 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:46,598 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 11:30:46,604 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:46,604 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 159 treesize of output 147 [2023-08-30 11:30:46,608 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 29 treesize of output 25 [2023-08-30 11:30:46,622 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 20 [2023-08-30 11:30:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:46,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966725161] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:30:46,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:30:46,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-30 11:30:46,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893233533] [2023-08-30 11:30:46,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:30:46,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 11:30:46,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:46,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 11:30:46,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1749, Unknown=5, NotChecked=84, Total=1980 [2023-08-30 11:30:46,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:30:46,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 273 transitions, 3810 flow. Second operand has 45 states, 45 states have (on average 80.46666666666667) internal successors, (3621), 45 states have internal predecessors, (3621), 0 states have call successors, (0), 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 11:30:46,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:46,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:30:46,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:50,774 INFO L130 PetriNetUnfolder]: 9382/16417 cut-off events. [2023-08-30 11:30:50,775 INFO L131 PetriNetUnfolder]: For 166027/166027 co-relation queries the response was YES. [2023-08-30 11:30:50,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119346 conditions, 16417 events. 9382/16417 cut-off events. For 166027/166027 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 119281 event pairs, 1386 based on Foata normal form. 278/16417 useless extension candidates. Maximal degree in co-relation 119303. Up to 4889 conditions per place. [2023-08-30 11:30:50,887 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 1143 selfloop transitions, 34 changer transitions 0/1181 dead transitions. [2023-08-30 11:30:50,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 1181 transitions, 22316 flow [2023-08-30 11:30:50,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 11:30:50,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 11:30:50,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1996 transitions. [2023-08-30 11:30:50,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.349929873772791 [2023-08-30 11:30:50,889 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1996 transitions. [2023-08-30 11:30:50,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1996 transitions. [2023-08-30 11:30:50,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:50,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1996 transitions. [2023-08-30 11:30:50,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 86.78260869565217) internal successors, (1996), 23 states have internal predecessors, (1996), 0 states have call successors, (0), 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 11:30:50,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 248.0) internal successors, (5952), 24 states have internal predecessors, (5952), 0 states have call successors, (0), 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 11:30:50,893 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 248.0) internal successors, (5952), 24 states have internal predecessors, (5952), 0 states have call successors, (0), 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 11:30:50,893 INFO L175 Difference]: Start difference. First operand has 260 places, 273 transitions, 3810 flow. Second operand 23 states and 1996 transitions. [2023-08-30 11:30:50,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 1181 transitions, 22316 flow [2023-08-30 11:30:51,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 1181 transitions, 22212 flow, removed 1 selfloop flow, removed 21 redundant places. [2023-08-30 11:30:51,192 INFO L231 Difference]: Finished difference. Result has 261 places, 272 transitions, 3763 flow [2023-08-30 11:30:51,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=3695, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3763, PETRI_PLACES=261, PETRI_TRANSITIONS=272} [2023-08-30 11:30:51,192 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 222 predicate places. [2023-08-30 11:30:51,192 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 272 transitions, 3763 flow [2023-08-30 11:30:51,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 80.46666666666667) internal successors, (3621), 45 states have internal predecessors, (3621), 0 states have call successors, (0), 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 11:30:51,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:51,193 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1] [2023-08-30 11:30:51,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-08-30 11:30:51,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-08-30 11:30:51,393 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:30:51,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:51,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2135580424, now seen corresponding path program 6 times [2023-08-30 11:30:51,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:51,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126637360] [2023-08-30 11:30:51,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:51,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:51,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:51,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126637360] [2023-08-30 11:30:51,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126637360] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:30:51,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992003919] [2023-08-30 11:30:51,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:30:51,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:51,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:30:51,567 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:30:51,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-30 11:30:51,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-08-30 11:30:51,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:30:51,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 11:30:51,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:30:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:52,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:30:52,275 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:52,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992003919] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:30:52,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:30:52,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2023-08-30 11:30:52,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829380008] [2023-08-30 11:30:52,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:30:52,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 11:30:52,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:52,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 11:30:52,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2023-08-30 11:30:52,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 11:30:52,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 272 transitions, 3763 flow. Second operand has 39 states, 39 states have (on average 97.51282051282051) internal successors, (3803), 39 states have internal predecessors, (3803), 0 states have call successors, (0), 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 11:30:52,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:52,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 11:30:52,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:56,087 INFO L130 PetriNetUnfolder]: 11574/20411 cut-off events. [2023-08-30 11:30:56,087 INFO L131 PetriNetUnfolder]: For 187047/188027 co-relation queries the response was YES. [2023-08-30 11:30:56,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142021 conditions, 20411 events. 11574/20411 cut-off events. For 187047/188027 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 158445 event pairs, 3944 based on Foata normal form. 1514/21561 useless extension candidates. Maximal degree in co-relation 141979. Up to 5680 conditions per place. [2023-08-30 11:30:56,343 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 619 selfloop transitions, 85 changer transitions 60/765 dead transitions. [2023-08-30 11:30:56,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 765 transitions, 11393 flow [2023-08-30 11:30:56,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 11:30:56,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 11:30:56,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2524 transitions. [2023-08-30 11:30:56,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42405913978494625 [2023-08-30 11:30:56,345 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2524 transitions. [2023-08-30 11:30:56,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2524 transitions. [2023-08-30 11:30:56,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:56,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2524 transitions. [2023-08-30 11:30:56,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 105.16666666666667) internal successors, (2524), 24 states have internal predecessors, (2524), 0 states have call successors, (0), 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 11:30:56,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 248.0) internal successors, (6200), 25 states have internal predecessors, (6200), 0 states have call successors, (0), 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 11:30:56,350 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 248.0) internal successors, (6200), 25 states have internal predecessors, (6200), 0 states have call successors, (0), 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 11:30:56,350 INFO L175 Difference]: Start difference. First operand has 261 places, 272 transitions, 3763 flow. Second operand 24 states and 2524 transitions. [2023-08-30 11:30:56,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 765 transitions, 11393 flow [2023-08-30 11:30:56,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 765 transitions, 10685 flow, removed 18 selfloop flow, removed 23 redundant places. [2023-08-30 11:30:56,725 INFO L231 Difference]: Finished difference. Result has 265 places, 283 transitions, 4036 flow [2023-08-30 11:30:56,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=3283, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4036, PETRI_PLACES=265, PETRI_TRANSITIONS=283} [2023-08-30 11:30:56,726 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 226 predicate places. [2023-08-30 11:30:56,726 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 283 transitions, 4036 flow [2023-08-30 11:30:56,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 97.51282051282051) internal successors, (3803), 39 states have internal predecessors, (3803), 0 states have call successors, (0), 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 11:30:56,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:56,727 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2023-08-30 11:30:56,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-08-30 11:30:56,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-08-30 11:30:56,934 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:30:56,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:56,934 INFO L85 PathProgramCache]: Analyzing trace with hash -435426584, now seen corresponding path program 7 times [2023-08-30 11:30:56,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:56,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990288537] [2023-08-30 11:30:56,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:56,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:56,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:57,437 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:57,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:57,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990288537] [2023-08-30 11:30:57,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990288537] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:30:57,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810664462] [2023-08-30 11:30:57,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:30:57,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:57,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:30:57,440 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:30:57,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-30 11:30:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:57,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 11:30:57,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:30:57,897 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 11:30:57,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:30:57,940 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 11:30:57,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:30:57,976 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 11:30:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:58,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:30:58,455 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2195 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2195) c_~A~0.base) (+ c_~A~0.offset 24)) 9223372039002259456))) is different from false [2023-08-30 11:30:58,462 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2195 (Array Int Int)) (v_ArrVal_2194 (Array Int Int))) (< 0 (+ 9223372039002259456 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2194) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2195) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 24 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) is different from false [2023-08-30 11:30:58,469 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:58,470 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 11:30:58,475 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:58,475 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 159 treesize of output 147 [2023-08-30 11:30:58,479 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 20 [2023-08-30 11:30:58,483 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 29 treesize of output 25 [2023-08-30 11:30:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-08-30 11:30:58,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810664462] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:30:58,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:30:58,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-08-30 11:30:58,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750800443] [2023-08-30 11:30:58,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:30:58,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-08-30 11:30:58,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:58,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-08-30 11:30:58,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2198, Unknown=2, NotChecked=190, Total=2550 [2023-08-30 11:30:58,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:30:58,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 283 transitions, 4036 flow. Second operand has 51 states, 51 states have (on average 80.43137254901961) internal successors, (4102), 51 states have internal predecessors, (4102), 0 states have call successors, (0), 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 11:30:58,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:58,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:30:58,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:31:04,414 INFO L130 PetriNetUnfolder]: 12419/21943 cut-off events. [2023-08-30 11:31:04,414 INFO L131 PetriNetUnfolder]: For 193914/194884 co-relation queries the response was YES. [2023-08-30 11:31:04,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153023 conditions, 21943 events. 12419/21943 cut-off events. For 193914/194884 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 170013 event pairs, 4930 based on Foata normal form. 1362/22493 useless extension candidates. Maximal degree in co-relation 152975. Up to 8260 conditions per place. [2023-08-30 11:31:04,560 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 719 selfloop transitions, 139 changer transitions 8/867 dead transitions. [2023-08-30 11:31:04,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 867 transitions, 12585 flow [2023-08-30 11:31:04,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 11:31:04,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 11:31:04,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2382 transitions. [2023-08-30 11:31:04,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3557347670250896 [2023-08-30 11:31:04,562 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2382 transitions. [2023-08-30 11:31:04,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2382 transitions. [2023-08-30 11:31:04,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:31:04,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2382 transitions. [2023-08-30 11:31:04,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 88.22222222222223) internal successors, (2382), 27 states have internal predecessors, (2382), 0 states have call successors, (0), 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 11:31:04,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 248.0) internal successors, (6944), 28 states have internal predecessors, (6944), 0 states have call successors, (0), 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 11:31:04,567 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 248.0) internal successors, (6944), 28 states have internal predecessors, (6944), 0 states have call successors, (0), 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 11:31:04,567 INFO L175 Difference]: Start difference. First operand has 265 places, 283 transitions, 4036 flow. Second operand 27 states and 2382 transitions. [2023-08-30 11:31:04,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 867 transitions, 12585 flow [2023-08-30 11:31:05,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 867 transitions, 12570 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 11:31:05,256 INFO L231 Difference]: Finished difference. Result has 286 places, 302 transitions, 4691 flow [2023-08-30 11:31:05,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=4021, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4691, PETRI_PLACES=286, PETRI_TRANSITIONS=302} [2023-08-30 11:31:05,256 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 247 predicate places. [2023-08-30 11:31:05,256 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 302 transitions, 4691 flow [2023-08-30 11:31:05,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 80.43137254901961) internal successors, (4102), 51 states have internal predecessors, (4102), 0 states have call successors, (0), 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 11:31:05,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:31:05,257 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2023-08-30 11:31:05,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-30 11:31:05,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-08-30 11:31:05,462 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:31:05,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:31:05,462 INFO L85 PathProgramCache]: Analyzing trace with hash -435426583, now seen corresponding path program 7 times [2023-08-30 11:31:05,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:31:05,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821681458] [2023-08-30 11:31:05,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:31:05,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:31:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:31:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:05,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:31:05,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821681458] [2023-08-30 11:31:05,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821681458] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:31:05,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241008233] [2023-08-30 11:31:05,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:31:05,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:31:05,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:31:05,930 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:31:05,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-30 11:31:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:31:06,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 11:31:06,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:31:06,461 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 11:31:06,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:31:06,507 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 11:31:06,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:31:06,540 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 11:31:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:06,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:31:07,039 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:31:07,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 11:31:07,046 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:31:07,046 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 11:31:07,050 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 11:31:07,070 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 11:31:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:07,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241008233] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:31:07,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:31:07,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-08-30 11:31:07,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41184042] [2023-08-30 11:31:07,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:31:07,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-08-30 11:31:07,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:31:07,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-08-30 11:31:07,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2370, Unknown=15, NotChecked=0, Total=2550 [2023-08-30 11:31:08,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 248 [2023-08-30 11:31:08,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 302 transitions, 4691 flow. Second operand has 51 states, 51 states have (on average 81.43137254901961) internal successors, (4153), 51 states have internal predecessors, (4153), 0 states have call successors, (0), 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 11:31:08,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:31:08,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 248 [2023-08-30 11:31:08,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:31:14,029 INFO L130 PetriNetUnfolder]: 12251/21629 cut-off events. [2023-08-30 11:31:14,030 INFO L131 PetriNetUnfolder]: For 199587/200537 co-relation queries the response was YES. [2023-08-30 11:31:14,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155513 conditions, 21629 events. 12251/21629 cut-off events. For 199587/200537 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 166816 event pairs, 5002 based on Foata normal form. 1046/21875 useless extension candidates. Maximal degree in co-relation 155462. Up to 8260 conditions per place. [2023-08-30 11:31:14,210 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 716 selfloop transitions, 139 changer transitions 8/864 dead transitions. [2023-08-30 11:31:14,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 864 transitions, 12844 flow [2023-08-30 11:31:14,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 11:31:14,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 11:31:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2406 transitions. [2023-08-30 11:31:14,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3593189964157706 [2023-08-30 11:31:14,213 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2406 transitions. [2023-08-30 11:31:14,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2406 transitions. [2023-08-30 11:31:14,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:31:14,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2406 transitions. [2023-08-30 11:31:14,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 89.11111111111111) internal successors, (2406), 27 states have internal predecessors, (2406), 0 states have call successors, (0), 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 11:31:14,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 248.0) internal successors, (6944), 28 states have internal predecessors, (6944), 0 states have call successors, (0), 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 11:31:14,218 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 248.0) internal successors, (6944), 28 states have internal predecessors, (6944), 0 states have call successors, (0), 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 11:31:14,218 INFO L175 Difference]: Start difference. First operand has 286 places, 302 transitions, 4691 flow. Second operand 27 states and 2406 transitions. [2023-08-30 11:31:14,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 864 transitions, 12844 flow [2023-08-30 11:31:15,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 864 transitions, 12612 flow, removed 34 selfloop flow, removed 19 redundant places. [2023-08-30 11:31:15,413 INFO L231 Difference]: Finished difference. Result has 293 places, 300 transitions, 4696 flow [2023-08-30 11:31:15,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=4418, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4696, PETRI_PLACES=293, PETRI_TRANSITIONS=300} [2023-08-30 11:31:15,414 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 254 predicate places. [2023-08-30 11:31:15,414 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 300 transitions, 4696 flow [2023-08-30 11:31:15,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 81.43137254901961) internal successors, (4153), 51 states have internal predecessors, (4153), 0 states have call successors, (0), 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 11:31:15,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:31:15,415 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:31:15,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-30 11:31:15,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-08-30 11:31:15,620 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:31:15,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:31:15,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1573816566, now seen corresponding path program 6 times [2023-08-30 11:31:15,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:31:15,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517318006] [2023-08-30 11:31:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:31:15,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:31:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:31:15,809 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:15,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:31:15,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517318006] [2023-08-30 11:31:15,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517318006] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:31:15,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135453968] [2023-08-30 11:31:15,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:31:15,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:31:15,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:31:15,810 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:31:15,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-30 11:31:16,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-08-30 11:31:16,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:31:16,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 11:31:16,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:31:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:16,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:31:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:17,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135453968] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:31:17,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:31:17,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2023-08-30 11:31:17,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956862298] [2023-08-30 11:31:17,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:31:17,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 11:31:17,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:31:17,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 11:31:17,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2023-08-30 11:31:17,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 11:31:17,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 300 transitions, 4696 flow. Second operand has 39 states, 39 states have (on average 97.48717948717949) internal successors, (3802), 39 states have internal predecessors, (3802), 0 states have call successors, (0), 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 11:31:17,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:31:17,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 11:31:17,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:31:20,549 INFO L130 PetriNetUnfolder]: 11012/19679 cut-off events. [2023-08-30 11:31:20,549 INFO L131 PetriNetUnfolder]: For 213530/213530 co-relation queries the response was YES. [2023-08-30 11:31:20,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138844 conditions, 19679 events. 11012/19679 cut-off events. For 213530/213530 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 149542 event pairs, 3584 based on Foata normal form. 552/19651 useless extension candidates. Maximal degree in co-relation 138803. Up to 8201 conditions per place. [2023-08-30 11:31:20,673 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 228 selfloop transitions, 12 changer transitions 807/1050 dead transitions. [2023-08-30 11:31:20,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 1050 transitions, 20691 flow [2023-08-30 11:31:20,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 11:31:20,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 11:31:20,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2456 transitions. [2023-08-30 11:31:20,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41263440860215056 [2023-08-30 11:31:20,676 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2456 transitions. [2023-08-30 11:31:20,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2456 transitions. [2023-08-30 11:31:20,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:31:20,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2456 transitions. [2023-08-30 11:31:20,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 102.33333333333333) internal successors, (2456), 24 states have internal predecessors, (2456), 0 states have call successors, (0), 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 11:31:20,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 248.0) internal successors, (6200), 25 states have internal predecessors, (6200), 0 states have call successors, (0), 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 11:31:20,683 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 248.0) internal successors, (6200), 25 states have internal predecessors, (6200), 0 states have call successors, (0), 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 11:31:20,683 INFO L175 Difference]: Start difference. First operand has 293 places, 300 transitions, 4696 flow. Second operand 24 states and 2456 transitions. [2023-08-30 11:31:20,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 1050 transitions, 20691 flow [2023-08-30 11:31:21,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 1050 transitions, 19647 flow, removed 3 selfloop flow, removed 22 redundant places. [2023-08-30 11:31:21,159 INFO L231 Difference]: Finished difference. Result has 302 places, 195 transitions, 2828 flow [2023-08-30 11:31:21,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=4458, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2828, PETRI_PLACES=302, PETRI_TRANSITIONS=195} [2023-08-30 11:31:21,159 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 263 predicate places. [2023-08-30 11:31:21,159 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 195 transitions, 2828 flow [2023-08-30 11:31:21,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 97.48717948717949) internal successors, (3802), 39 states have internal predecessors, (3802), 0 states have call successors, (0), 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 11:31:21,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:31:21,160 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:31:21,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-30 11:31:21,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:31:21,365 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:31:21,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:31:21,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1603253898, now seen corresponding path program 7 times [2023-08-30 11:31:21,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:31:21,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308773839] [2023-08-30 11:31:21,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:31:21,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:31:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:31:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:22,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:31:22,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308773839] [2023-08-30 11:31:22,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308773839] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:31:22,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957838015] [2023-08-30 11:31:22,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:31:22,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:31:22,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:31:22,040 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:31:22,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-30 11:31:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:31:22,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 11:31:22,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:31:22,515 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 11:31:22,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:31:22,559 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 11:31:22,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:31:22,601 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 18 treesize of output 20 [2023-08-30 11:31:22,888 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:22,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:31:23,162 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2361 (Array Int Int))) (< 0 (+ 4294967296 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2361) c_~A~0.base) (+ c_~A~0.offset 24))))) is different from false [2023-08-30 11:31:23,266 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:31:23,267 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 11:31:23,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:31:23,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 147 [2023-08-30 11:31:23,280 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 29 treesize of output 25 [2023-08-30 11:31:23,301 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 20 [2023-08-30 11:31:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:23,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957838015] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:31:23,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:31:23,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2023-08-30 11:31:23,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440394969] [2023-08-30 11:31:23,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:31:23,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-08-30 11:31:23,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:31:23,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-08-30 11:31:23,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2488, Unknown=9, NotChecked=100, Total=2756 [2023-08-30 11:31:23,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:31:23,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 195 transitions, 2828 flow. Second operand has 53 states, 53 states have (on average 80.47169811320755) internal successors, (4265), 53 states have internal predecessors, (4265), 0 states have call successors, (0), 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 11:31:23,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:31:23,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:31:23,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:31:29,312 INFO L130 PetriNetUnfolder]: 7174/12957 cut-off events. [2023-08-30 11:31:29,312 INFO L131 PetriNetUnfolder]: For 152237/152237 co-relation queries the response was YES. [2023-08-30 11:31:29,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94416 conditions, 12957 events. 7174/12957 cut-off events. For 152237/152237 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 91962 event pairs, 1166 based on Foata normal form. 396/13155 useless extension candidates. Maximal degree in co-relation 94367. Up to 3611 conditions per place. [2023-08-30 11:31:29,399 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 758 selfloop transitions, 37 changer transitions 0/798 dead transitions. [2023-08-30 11:31:29,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 798 transitions, 16325 flow [2023-08-30 11:31:29,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 11:31:29,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 11:31:29,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2260 transitions. [2023-08-30 11:31:29,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35049627791563276 [2023-08-30 11:31:29,401 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2260 transitions. [2023-08-30 11:31:29,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2260 transitions. [2023-08-30 11:31:29,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:31:29,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2260 transitions. [2023-08-30 11:31:29,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 86.92307692307692) internal successors, (2260), 26 states have internal predecessors, (2260), 0 states have call successors, (0), 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 11:31:29,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 248.0) internal successors, (6696), 27 states have internal predecessors, (6696), 0 states have call successors, (0), 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 11:31:29,406 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 248.0) internal successors, (6696), 27 states have internal predecessors, (6696), 0 states have call successors, (0), 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 11:31:29,406 INFO L175 Difference]: Start difference. First operand has 302 places, 195 transitions, 2828 flow. Second operand 26 states and 2260 transitions. [2023-08-30 11:31:29,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 798 transitions, 16325 flow [2023-08-30 11:31:29,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 798 transitions, 12802 flow, removed 177 selfloop flow, removed 40 redundant places. [2023-08-30 11:31:29,947 INFO L231 Difference]: Finished difference. Result has 233 places, 199 transitions, 2503 flow [2023-08-30 11:31:29,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2349, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2503, PETRI_PLACES=233, PETRI_TRANSITIONS=199} [2023-08-30 11:31:29,947 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 194 predicate places. [2023-08-30 11:31:29,947 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 199 transitions, 2503 flow [2023-08-30 11:31:29,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 80.47169811320755) internal successors, (4265), 53 states have internal predecessors, (4265), 0 states have call successors, (0), 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 11:31:29,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:31:29,948 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:31:29,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-30 11:31:30,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:31:30,148 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:31:30,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:31:30,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1603253899, now seen corresponding path program 10 times [2023-08-30 11:31:30,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:31:30,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968178026] [2023-08-30 11:31:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:31:30,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:31:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:31:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:30,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:31:30,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968178026] [2023-08-30 11:31:30,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968178026] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:31:30,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45504738] [2023-08-30 11:31:30,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:31:30,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:31:30,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:31:30,713 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:31:30,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-30 11:31:30,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:31:30,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:31:30,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 11:31:30,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:31:31,178 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 11:31:31,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:31:31,221 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 11:31:31,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:31:31,262 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 11:31:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:31,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:31:31,678 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2419 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2419) c_~A~0.base) (+ c_~A~0.offset 24)) 9223372039002259456)) is different from false [2023-08-30 11:31:31,741 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:31:31,742 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 11:31:31,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:31:31,754 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 11:31:31,759 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 11:31:31,762 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 11:31:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:32,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45504738] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:31:32,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:31:32,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-08-30 11:31:32,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292535421] [2023-08-30 11:31:32,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:31:32,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-08-30 11:31:32,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:31:32,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-08-30 11:31:32,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2279, Unknown=13, NotChecked=96, Total=2550 [2023-08-30 11:31:32,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:31:32,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 199 transitions, 2503 flow. Second operand has 51 states, 51 states have (on average 80.47058823529412) internal successors, (4104), 51 states have internal predecessors, (4104), 0 states have call successors, (0), 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 11:31:32,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:31:32,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:31:32,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:31:36,311 INFO L130 PetriNetUnfolder]: 6926/12511 cut-off events. [2023-08-30 11:31:36,311 INFO L131 PetriNetUnfolder]: For 80776/80776 co-relation queries the response was YES. [2023-08-30 11:31:36,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86075 conditions, 12511 events. 6926/12511 cut-off events. For 80776/80776 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 88240 event pairs, 1098 based on Foata normal form. 198/12341 useless extension candidates. Maximal degree in co-relation 86040. Up to 3553 conditions per place. [2023-08-30 11:31:36,396 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 757 selfloop transitions, 37 changer transitions 0/797 dead transitions. [2023-08-30 11:31:36,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 797 transitions, 12888 flow [2023-08-30 11:31:36,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 11:31:36,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 11:31:36,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2257 transitions. [2023-08-30 11:31:36,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.350031017369727 [2023-08-30 11:31:36,398 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2257 transitions. [2023-08-30 11:31:36,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2257 transitions. [2023-08-30 11:31:36,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:31:36,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2257 transitions. [2023-08-30 11:31:36,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 86.8076923076923) internal successors, (2257), 26 states have internal predecessors, (2257), 0 states have call successors, (0), 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 11:31:36,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 248.0) internal successors, (6696), 27 states have internal predecessors, (6696), 0 states have call successors, (0), 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 11:31:36,403 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 248.0) internal successors, (6696), 27 states have internal predecessors, (6696), 0 states have call successors, (0), 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 11:31:36,403 INFO L175 Difference]: Start difference. First operand has 233 places, 199 transitions, 2503 flow. Second operand 26 states and 2257 transitions. [2023-08-30 11:31:36,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 797 transitions, 12888 flow [2023-08-30 11:31:36,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 797 transitions, 12616 flow, removed 1 selfloop flow, removed 26 redundant places. [2023-08-30 11:31:36,498 INFO L231 Difference]: Finished difference. Result has 232 places, 198 transitions, 2436 flow [2023-08-30 11:31:36,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2362, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2436, PETRI_PLACES=232, PETRI_TRANSITIONS=198} [2023-08-30 11:31:36,499 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 193 predicate places. [2023-08-30 11:31:36,499 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 198 transitions, 2436 flow [2023-08-30 11:31:36,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 80.47058823529412) internal successors, (4104), 51 states have internal predecessors, (4104), 0 states have call successors, (0), 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 11:31:36,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:31:36,499 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1] [2023-08-30 11:31:36,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-08-30 11:31:36,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:31:36,700 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:31:36,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:31:36,700 INFO L85 PathProgramCache]: Analyzing trace with hash 116884195, now seen corresponding path program 9 times [2023-08-30 11:31:36,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:31:36,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941541309] [2023-08-30 11:31:36,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:31:36,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:31:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:31:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:37,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:31:37,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941541309] [2023-08-30 11:31:37,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941541309] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:31:37,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635576817] [2023-08-30 11:31:37,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:31:37,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:31:37,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:31:37,219 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:31:37,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-30 11:31:37,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-08-30 11:31:37,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:31:37,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 11:31:37,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:31:37,913 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 11:31:37,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:31:37,968 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 11:31:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:38,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:31:38,988 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:31:38,988 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 11:31:38,995 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:31:38,995 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 41 treesize of output 33 [2023-08-30 11:31:38,999 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 13 treesize of output 7 [2023-08-30 11:31:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:39,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635576817] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:31:39,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:31:39,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2023-08-30 11:31:39,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297108069] [2023-08-30 11:31:39,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:31:39,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-08-30 11:31:39,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:31:39,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-08-30 11:31:39,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=2759, Unknown=0, NotChecked=0, Total=3080 [2023-08-30 11:31:40,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 11:31:46,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 248 [2023-08-30 11:31:46,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 198 transitions, 2436 flow. Second operand has 56 states, 56 states have (on average 87.44642857142857) internal successors, (4897), 56 states have internal predecessors, (4897), 0 states have call successors, (0), 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 11:31:46,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:31:46,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 248 [2023-08-30 11:31:46,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:31:47,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 11:31:54,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 11:31:59,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 11:32:10,514 INFO L130 PetriNetUnfolder]: 22643/38834 cut-off events. [2023-08-30 11:32:10,514 INFO L131 PetriNetUnfolder]: For 252945/254495 co-relation queries the response was YES. [2023-08-30 11:32:10,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270217 conditions, 38834 events. 22643/38834 cut-off events. For 252945/254495 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 315033 event pairs, 5268 based on Foata normal form. 1769/39404 useless extension candidates. Maximal degree in co-relation 270183. Up to 11216 conditions per place. [2023-08-30 11:32:10,874 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 1385 selfloop transitions, 370 changer transitions 4/1760 dead transitions. [2023-08-30 11:32:10,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 1760 transitions, 26301 flow [2023-08-30 11:32:10,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2023-08-30 11:32:10,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2023-08-30 11:32:10,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 12924 transitions. [2023-08-30 11:32:10,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3669922762380736 [2023-08-30 11:32:10,882 INFO L72 ComplementDD]: Start complementDD. Operand 142 states and 12924 transitions. [2023-08-30 11:32:10,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 142 states and 12924 transitions. [2023-08-30 11:32:10,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:10,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 142 states and 12924 transitions. [2023-08-30 11:32:10,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 143 states, 142 states have (on average 91.01408450704226) internal successors, (12924), 142 states have internal predecessors, (12924), 0 states have call successors, (0), 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 11:32:10,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 143 states, 143 states have (on average 248.0) internal successors, (35464), 143 states have internal predecessors, (35464), 0 states have call successors, (0), 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 11:32:10,911 INFO L81 ComplementDD]: Finished complementDD. Result has 143 states, 143 states have (on average 248.0) internal successors, (35464), 143 states have internal predecessors, (35464), 0 states have call successors, (0), 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 11:32:10,911 INFO L175 Difference]: Start difference. First operand has 232 places, 198 transitions, 2436 flow. Second operand 142 states and 12924 transitions. [2023-08-30 11:32:10,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 1760 transitions, 26301 flow [2023-08-30 11:32:11,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 1760 transitions, 24795 flow, removed 37 selfloop flow, removed 23 redundant places. [2023-08-30 11:32:11,365 INFO L231 Difference]: Finished difference. Result has 364 places, 457 transitions, 6844 flow [2023-08-30 11:32:11,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2370, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=142, PETRI_FLOW=6844, PETRI_PLACES=364, PETRI_TRANSITIONS=457} [2023-08-30 11:32:11,365 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 325 predicate places. [2023-08-30 11:32:11,365 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 457 transitions, 6844 flow [2023-08-30 11:32:11,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 87.44642857142857) internal successors, (4897), 56 states have internal predecessors, (4897), 0 states have call successors, (0), 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 11:32:11,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:11,366 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1] [2023-08-30 11:32:11,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-08-30 11:32:11,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:11,572 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:32:11,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:11,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1455245549, now seen corresponding path program 8 times [2023-08-30 11:32:11,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:11,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429722114] [2023-08-30 11:32:11,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:11,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 36 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:11,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:11,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429722114] [2023-08-30 11:32:11,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429722114] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:11,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302773494] [2023-08-30 11:32:11,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:32:11,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:11,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:11,799 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:32:11,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-30 11:32:12,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:32:12,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:32:12,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 11:32:12,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:12,332 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 49 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:12,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:32:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 49 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:12,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302773494] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:32:12,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:32:12,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 42 [2023-08-30 11:32:12,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892652804] [2023-08-30 11:32:12,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:32:12,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 11:32:12,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:12,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 11:32:12,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2023-08-30 11:32:12,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 11:32:12,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 457 transitions, 6844 flow. Second operand has 44 states, 44 states have (on average 97.5) internal successors, (4290), 44 states have internal predecessors, (4290), 0 states have call successors, (0), 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 11:32:12,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:12,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 11:32:12,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:19,547 INFO L130 PetriNetUnfolder]: 20147/34880 cut-off events. [2023-08-30 11:32:19,547 INFO L131 PetriNetUnfolder]: For 278851/280316 co-relation queries the response was YES. [2023-08-30 11:32:19,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245982 conditions, 34880 events. 20147/34880 cut-off events. For 278851/280316 co-relation queries the response was YES. Maximal size of possible extension queue 825. Compared 279785 event pairs, 8021 based on Foata normal form. 2108/35916 useless extension candidates. Maximal degree in co-relation 245934. Up to 13567 conditions per place. [2023-08-30 11:32:19,858 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 851 selfloop transitions, 117 changer transitions 68/1037 dead transitions. [2023-08-30 11:32:19,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 1037 transitions, 15516 flow [2023-08-30 11:32:19,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 11:32:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 11:32:19,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2838 transitions. [2023-08-30 11:32:19,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42383512544802865 [2023-08-30 11:32:19,861 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2838 transitions. [2023-08-30 11:32:19,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2838 transitions. [2023-08-30 11:32:19,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:19,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2838 transitions. [2023-08-30 11:32:19,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 105.11111111111111) internal successors, (2838), 27 states have internal predecessors, (2838), 0 states have call successors, (0), 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 11:32:19,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 248.0) internal successors, (6944), 28 states have internal predecessors, (6944), 0 states have call successors, (0), 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 11:32:19,866 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 248.0) internal successors, (6944), 28 states have internal predecessors, (6944), 0 states have call successors, (0), 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 11:32:19,866 INFO L175 Difference]: Start difference. First operand has 364 places, 457 transitions, 6844 flow. Second operand 27 states and 2838 transitions. [2023-08-30 11:32:19,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 1037 transitions, 15516 flow [2023-08-30 11:32:21,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1037 transitions, 14841 flow, removed 51 selfloop flow, removed 49 redundant places. [2023-08-30 11:32:21,382 INFO L231 Difference]: Finished difference. Result has 342 places, 449 transitions, 6230 flow [2023-08-30 11:32:21,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=5807, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=6230, PETRI_PLACES=342, PETRI_TRANSITIONS=449} [2023-08-30 11:32:21,383 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 303 predicate places. [2023-08-30 11:32:21,383 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 449 transitions, 6230 flow [2023-08-30 11:32:21,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 97.5) internal successors, (4290), 44 states have internal predecessors, (4290), 0 states have call successors, (0), 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 11:32:21,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:21,384 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1] [2023-08-30 11:32:21,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-08-30 11:32:21,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:21,590 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:32:21,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:21,590 INFO L85 PathProgramCache]: Analyzing trace with hash 116884194, now seen corresponding path program 7 times [2023-08-30 11:32:21,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:21,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707521131] [2023-08-30 11:32:21,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:21,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:22,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:22,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707521131] [2023-08-30 11:32:22,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707521131] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:22,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209213833] [2023-08-30 11:32:22,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:32:22,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:22,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:22,166 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:32:22,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-30 11:32:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:22,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-30 11:32:22,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:22,648 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 11:32:22,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:32:22,687 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 11:32:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:22,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:32:23,271 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:32:23,271 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 11:32:23,276 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:32:23,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2023-08-30 11:32:23,281 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 11:32:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:23,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209213833] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:32:23,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:32:23,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2023-08-30 11:32:23,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215064851] [2023-08-30 11:32:23,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:32:23,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-08-30 11:32:23,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:23,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-08-30 11:32:23,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2684, Unknown=7, NotChecked=0, Total=2862 [2023-08-30 11:32:27,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 248 [2023-08-30 11:32:27,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 449 transitions, 6230 flow. Second operand has 54 states, 54 states have (on average 95.44444444444444) internal successors, (5154), 54 states have internal predecessors, (5154), 0 states have call successors, (0), 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 11:32:27,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:27,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 248 [2023-08-30 11:32:27,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:33,980 INFO L130 PetriNetUnfolder]: 20141/34870 cut-off events. [2023-08-30 11:32:33,980 INFO L131 PetriNetUnfolder]: For 261184/262564 co-relation queries the response was YES. [2023-08-30 11:32:34,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248809 conditions, 34870 events. 20141/34870 cut-off events. For 261184/262564 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 277710 event pairs, 9222 based on Foata normal form. 1388/35150 useless extension candidates. Maximal degree in co-relation 248762. Up to 15412 conditions per place. [2023-08-30 11:32:34,423 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 333 selfloop transitions, 264 changer transitions 8/606 dead transitions. [2023-08-30 11:32:34,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 606 transitions, 9365 flow [2023-08-30 11:32:34,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 11:32:34,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 11:32:34,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3142 transitions. [2023-08-30 11:32:34,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39591733870967744 [2023-08-30 11:32:34,426 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3142 transitions. [2023-08-30 11:32:34,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3142 transitions. [2023-08-30 11:32:34,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:34,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3142 transitions. [2023-08-30 11:32:34,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 98.1875) internal successors, (3142), 32 states have internal predecessors, (3142), 0 states have call successors, (0), 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 11:32:34,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 248.0) internal successors, (8184), 33 states have internal predecessors, (8184), 0 states have call successors, (0), 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 11:32:34,434 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 248.0) internal successors, (8184), 33 states have internal predecessors, (8184), 0 states have call successors, (0), 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 11:32:34,434 INFO L175 Difference]: Start difference. First operand has 342 places, 449 transitions, 6230 flow. Second operand 32 states and 3142 transitions. [2023-08-30 11:32:34,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 606 transitions, 9365 flow [2023-08-30 11:32:35,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 606 transitions, 9344 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-08-30 11:32:35,430 INFO L231 Difference]: Finished difference. Result has 367 places, 451 transitions, 6818 flow [2023-08-30 11:32:35,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=6187, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=6818, PETRI_PLACES=367, PETRI_TRANSITIONS=451} [2023-08-30 11:32:35,430 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 328 predicate places. [2023-08-30 11:32:35,430 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 451 transitions, 6818 flow [2023-08-30 11:32:35,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 95.44444444444444) internal successors, (5154), 54 states have internal predecessors, (5154), 0 states have call successors, (0), 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 11:32:35,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:35,431 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2023-08-30 11:32:35,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-08-30 11:32:35,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-08-30 11:32:35,632 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:32:35,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:35,632 INFO L85 PathProgramCache]: Analyzing trace with hash 320249470, now seen corresponding path program 8 times [2023-08-30 11:32:35,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:35,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250014419] [2023-08-30 11:32:35,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:35,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:36,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:36,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250014419] [2023-08-30 11:32:36,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250014419] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:36,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733892319] [2023-08-30 11:32:36,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:32:36,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:36,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:36,377 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:32:36,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-30 11:32:36,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:32:36,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:32:36,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 11:32:36,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:36,958 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 11:32:37,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:32:37,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:32:37,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:32:37,108 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 11:32:37,443 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:37,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:32:38,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:32:38,088 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 31 treesize of output 32 [2023-08-30 11:32:38,096 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:32:38,096 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 89 treesize of output 81 [2023-08-30 11:32:38,101 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 36 treesize of output 30 [2023-08-30 11:32:38,104 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 50 [2023-08-30 11:32:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:38,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733892319] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:32:38,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:32:38,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2023-08-30 11:32:38,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956401572] [2023-08-30 11:32:38,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:32:38,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-08-30 11:32:38,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:38,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-08-30 11:32:38,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=3147, Unknown=3, NotChecked=0, Total=3422 [2023-08-30 11:32:42,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 248 [2023-08-30 11:32:42,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 451 transitions, 6818 flow. Second operand has 59 states, 59 states have (on average 71.42372881355932) internal successors, (4214), 59 states have internal predecessors, (4214), 0 states have call successors, (0), 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 11:32:42,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:42,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 248 [2023-08-30 11:32:42,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:34:48,984 INFO L130 PetriNetUnfolder]: 47965/80434 cut-off events. [2023-08-30 11:34:48,984 INFO L131 PetriNetUnfolder]: For 682121/685336 co-relation queries the response was YES. [2023-08-30 11:34:49,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612294 conditions, 80434 events. 47965/80434 cut-off events. For 682121/685336 co-relation queries the response was YES. Maximal size of possible extension queue 1746. Compared 697089 event pairs, 6888 based on Foata normal form. 4294/82346 useless extension candidates. Maximal degree in co-relation 612244. Up to 22561 conditions per place. [2023-08-30 11:34:50,004 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 3387 selfloop transitions, 526 changer transitions 196/4110 dead transitions. [2023-08-30 11:34:50,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 4110 transitions, 59967 flow [2023-08-30 11:34:50,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-08-30 11:34:50,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2023-08-30 11:34:50,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 9123 transitions. [2023-08-30 11:34:50,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32554239223522696 [2023-08-30 11:34:50,009 INFO L72 ComplementDD]: Start complementDD. Operand 113 states and 9123 transitions. [2023-08-30 11:34:50,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 9123 transitions. [2023-08-30 11:34:50,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:34:50,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 113 states and 9123 transitions. [2023-08-30 11:34:50,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 114 states, 113 states have (on average 80.73451327433628) internal successors, (9123), 113 states have internal predecessors, (9123), 0 states have call successors, (0), 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 11:34:50,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 114 states, 114 states have (on average 248.0) internal successors, (28272), 114 states have internal predecessors, (28272), 0 states have call successors, (0), 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 11:34:50,028 INFO L81 ComplementDD]: Finished complementDD. Result has 114 states, 114 states have (on average 248.0) internal successors, (28272), 114 states have internal predecessors, (28272), 0 states have call successors, (0), 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 11:34:50,028 INFO L175 Difference]: Start difference. First operand has 367 places, 451 transitions, 6818 flow. Second operand 113 states and 9123 transitions. [2023-08-30 11:34:50,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 4110 transitions, 59967 flow [2023-08-30 11:34:56,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 4110 transitions, 59367 flow, removed 12 selfloop flow, removed 25 redundant places. [2023-08-30 11:34:56,944 INFO L231 Difference]: Finished difference. Result has 459 places, 686 transitions, 11819 flow [2023-08-30 11:34:56,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=6305, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=113, PETRI_FLOW=11819, PETRI_PLACES=459, PETRI_TRANSITIONS=686} [2023-08-30 11:34:56,945 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 420 predicate places. [2023-08-30 11:34:56,945 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 686 transitions, 11819 flow [2023-08-30 11:34:56,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 71.42372881355932) internal successors, (4214), 59 states have internal predecessors, (4214), 0 states have call successors, (0), 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 11:34:56,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:34:56,945 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:34:56,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-08-30 11:34:57,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-08-30 11:34:57,146 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:34:57,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:34:57,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1166288446, now seen corresponding path program 8 times [2023-08-30 11:34:57,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:34:57,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372345951] [2023-08-30 11:34:57,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:34:57,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:34:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:34:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 36 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:57,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:34:57,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372345951] [2023-08-30 11:34:57,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372345951] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:34:57,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918667520] [2023-08-30 11:34:57,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:34:57,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:34:57,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:34:57,350 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:34:57,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-08-30 11:34:57,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:34:57,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:34:57,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 11:34:57,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:34:57,843 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 49 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:57,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:34:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 49 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:58,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918667520] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:34:58,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:34:58,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 42 [2023-08-30 11:34:58,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393705782] [2023-08-30 11:34:58,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:34:58,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 11:34:58,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:34:58,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 11:34:58,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2023-08-30 11:34:58,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 11:34:58,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 686 transitions, 11819 flow. Second operand has 44 states, 44 states have (on average 97.47727272727273) internal successors, (4289), 44 states have internal predecessors, (4289), 0 states have call successors, (0), 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 11:34:58,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:34:58,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 11:34:58,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:35:11,740 INFO L130 PetriNetUnfolder]: 44331/75047 cut-off events. [2023-08-30 11:35:11,740 INFO L131 PetriNetUnfolder]: For 848801/848801 co-relation queries the response was YES. [2023-08-30 11:35:12,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579246 conditions, 75047 events. 44331/75047 cut-off events. For 848801/848801 co-relation queries the response was YES. Maximal size of possible extension queue 1643. Compared 641840 event pairs, 14218 based on Foata normal form. 1404/74543 useless extension candidates. Maximal degree in co-relation 579190. Up to 34142 conditions per place. [2023-08-30 11:35:12,955 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 579 selfloop transitions, 13 changer transitions 3010/3608 dead transitions. [2023-08-30 11:35:12,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 3608 transitions, 73770 flow [2023-08-30 11:35:12,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 11:35:12,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 11:35:12,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2760 transitions. [2023-08-30 11:35:12,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2023-08-30 11:35:12,957 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2760 transitions. [2023-08-30 11:35:12,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2760 transitions. [2023-08-30 11:35:12,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:35:12,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2760 transitions. [2023-08-30 11:35:12,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 102.22222222222223) internal successors, (2760), 27 states have internal predecessors, (2760), 0 states have call successors, (0), 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 11:35:12,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 248.0) internal successors, (6944), 28 states have internal predecessors, (6944), 0 states have call successors, (0), 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 11:35:12,961 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 248.0) internal successors, (6944), 28 states have internal predecessors, (6944), 0 states have call successors, (0), 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 11:35:12,961 INFO L175 Difference]: Start difference. First operand has 459 places, 686 transitions, 11819 flow. Second operand 27 states and 2760 transitions. [2023-08-30 11:35:12,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 3608 transitions, 73770 flow [2023-08-30 11:35:18,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 3608 transitions, 72089 flow, removed 30 selfloop flow, removed 19 redundant places. [2023-08-30 11:35:18,206 INFO L231 Difference]: Finished difference. Result has 475 places, 433 transitions, 7168 flow [2023-08-30 11:35:18,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=11573, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7168, PETRI_PLACES=475, PETRI_TRANSITIONS=433} [2023-08-30 11:35:18,207 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 436 predicate places. [2023-08-30 11:35:18,207 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 433 transitions, 7168 flow [2023-08-30 11:35:18,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 97.47727272727273) internal successors, (4289), 44 states have internal predecessors, (4289), 0 states have call successors, (0), 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 11:35:18,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:35:18,208 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2023-08-30 11:35:18,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2023-08-30 11:35:18,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-08-30 11:35:18,414 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:35:18,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:35:18,414 INFO L85 PathProgramCache]: Analyzing trace with hash 978165291, now seen corresponding path program 9 times [2023-08-30 11:35:18,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:35:18,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331319862] [2023-08-30 11:35:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:35:18,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:35:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:35:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:19,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:35:19,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331319862] [2023-08-30 11:35:19,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331319862] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:35:19,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909839020] [2023-08-30 11:35:19,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:35:19,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:35:19,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:35:19,048 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:35:19,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-08-30 11:35:19,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-08-30 11:35:19,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:35:19,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 11:35:19,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:35:19,604 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 11:35:19,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:35:19,647 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 11:35:19,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:35:19,846 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 14 treesize of output 16 [2023-08-30 11:35:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:20,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:35:20,216 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2765 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2765) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset 20)) 4294967296)) is different from false [2023-08-30 11:35:20,322 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2765 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2765) c_~A~0.base) (+ c_~A~0.offset 28)) 4294967296)) is different from false [2023-08-30 11:35:20,487 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:35:20,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 11:35:20,491 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:35:20,491 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 71 treesize of output 65 [2023-08-30 11:35:20,494 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 11:35:20,496 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 50 treesize of output 42 [2023-08-30 11:35:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 13 not checked. [2023-08-30 11:35:20,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909839020] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:35:20,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:35:20,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2023-08-30 11:35:20,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765056924] [2023-08-30 11:35:20,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:35:20,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-08-30 11:35:20,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:35:20,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-08-30 11:35:20,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2997, Unknown=38, NotChecked=222, Total=3422 [2023-08-30 11:35:20,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:35:20,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 433 transitions, 7168 flow. Second operand has 59 states, 59 states have (on average 80.42372881355932) internal successors, (4745), 59 states have internal predecessors, (4745), 0 states have call successors, (0), 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 11:35:20,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:35:20,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:35:20,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:35:31,709 INFO L130 PetriNetUnfolder]: 25391/44479 cut-off events. [2023-08-30 11:35:31,709 INFO L131 PetriNetUnfolder]: For 537596/539446 co-relation queries the response was YES. [2023-08-30 11:35:32,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345782 conditions, 44479 events. 25391/44479 cut-off events. For 537596/539446 co-relation queries the response was YES. Maximal size of possible extension queue 1020. Compared 372470 event pairs, 7511 based on Foata normal form. 3205/46988 useless extension candidates. Maximal degree in co-relation 345721. Up to 12733 conditions per place. [2023-08-30 11:35:32,191 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 795 selfloop transitions, 236 changer transitions 0/1032 dead transitions. [2023-08-30 11:35:32,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 1032 transitions, 16989 flow [2023-08-30 11:35:32,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 11:35:32,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 11:35:32,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2536 transitions. [2023-08-30 11:35:32,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3526140155728587 [2023-08-30 11:35:32,193 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2536 transitions. [2023-08-30 11:35:32,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2536 transitions. [2023-08-30 11:35:32,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:35:32,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2536 transitions. [2023-08-30 11:35:32,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 87.44827586206897) internal successors, (2536), 29 states have internal predecessors, (2536), 0 states have call successors, (0), 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 11:35:32,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 248.0) internal successors, (7440), 30 states have internal predecessors, (7440), 0 states have call successors, (0), 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 11:35:32,197 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 248.0) internal successors, (7440), 30 states have internal predecessors, (7440), 0 states have call successors, (0), 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 11:35:32,198 INFO L175 Difference]: Start difference. First operand has 475 places, 433 transitions, 7168 flow. Second operand 29 states and 2536 transitions. [2023-08-30 11:35:32,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 1032 transitions, 16989 flow [2023-08-30 11:35:40,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1032 transitions, 15231 flow, removed 278 selfloop flow, removed 40 redundant places. [2023-08-30 11:35:40,542 INFO L231 Difference]: Finished difference. Result has 365 places, 439 transitions, 6720 flow [2023-08-30 11:35:40,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=5998, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=6720, PETRI_PLACES=365, PETRI_TRANSITIONS=439} [2023-08-30 11:35:40,543 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 326 predicate places. [2023-08-30 11:35:40,543 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 439 transitions, 6720 flow [2023-08-30 11:35:40,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 80.42372881355932) internal successors, (4745), 59 states have internal predecessors, (4745), 0 states have call successors, (0), 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 11:35:40,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:35:40,543 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:35:40,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-08-30 11:35:40,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:35:40,749 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:35:40,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:35:40,749 INFO L85 PathProgramCache]: Analyzing trace with hash 372059217, now seen corresponding path program 11 times [2023-08-30 11:35:40,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:35:40,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059687510] [2023-08-30 11:35:40,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:35:40,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:35:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:35:41,299 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:41,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:35:41,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059687510] [2023-08-30 11:35:41,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059687510] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:35:41,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365896252] [2023-08-30 11:35:41,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:35:41,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:35:41,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:35:41,301 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:35:41,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-08-30 11:35:41,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-08-30 11:35:41,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:35:41,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 11:35:41,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:35:41,877 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 11:35:41,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:35:41,922 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 11:35:41,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:35:41,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:35:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:42,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:35:42,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:35:42,605 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 11:35:42,611 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:35:42,611 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 71 treesize of output 65 [2023-08-30 11:35:42,614 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 11:35:42,617 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 50 treesize of output 42 [2023-08-30 11:35:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:42,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365896252] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:35:42,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:35:42,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2023-08-30 11:35:42,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335720876] [2023-08-30 11:35:42,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:35:42,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-08-30 11:35:42,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:35:42,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-08-30 11:35:42,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2993, Unknown=14, NotChecked=0, Total=3192 [2023-08-30 11:35:43,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:35:43,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 439 transitions, 6720 flow. Second operand has 57 states, 57 states have (on average 80.47368421052632) internal successors, (4587), 57 states have internal predecessors, (4587), 0 states have call successors, (0), 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 11:35:43,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:35:43,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:35:43,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:35:54,267 INFO L130 PetriNetUnfolder]: 29484/51661 cut-off events. [2023-08-30 11:35:54,267 INFO L131 PetriNetUnfolder]: For 577872/578262 co-relation queries the response was YES. [2023-08-30 11:35:54,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388957 conditions, 51661 events. 29484/51661 cut-off events. For 577872/578262 co-relation queries the response was YES. Maximal size of possible extension queue 1109. Compared 436983 event pairs, 4382 based on Foata normal form. 1778/52049 useless extension candidates. Maximal degree in co-relation 388906. Up to 14433 conditions per place. [2023-08-30 11:35:54,845 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 3284 selfloop transitions, 42 changer transitions 0/3332 dead transitions. [2023-08-30 11:35:54,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 3332 transitions, 70053 flow [2023-08-30 11:35:54,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 11:35:54,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 11:35:54,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2521 transitions. [2023-08-30 11:35:54,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35052836484983313 [2023-08-30 11:35:54,847 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2521 transitions. [2023-08-30 11:35:54,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2521 transitions. [2023-08-30 11:35:54,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:35:54,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2521 transitions. [2023-08-30 11:35:54,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 86.93103448275862) internal successors, (2521), 29 states have internal predecessors, (2521), 0 states have call successors, (0), 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 11:35:54,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 248.0) internal successors, (7440), 30 states have internal predecessors, (7440), 0 states have call successors, (0), 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 11:35:54,852 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 248.0) internal successors, (7440), 30 states have internal predecessors, (7440), 0 states have call successors, (0), 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 11:35:54,852 INFO L175 Difference]: Start difference. First operand has 365 places, 439 transitions, 6720 flow. Second operand 29 states and 2521 transitions. [2023-08-30 11:35:54,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 3332 transitions, 70053 flow [2023-08-30 11:35:57,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 3332 transitions, 66037 flow, removed 36 selfloop flow, removed 25 redundant places. [2023-08-30 11:35:57,369 INFO L231 Difference]: Finished difference. Result has 370 places, 443 transitions, 6463 flow [2023-08-30 11:35:57,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=6298, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=6463, PETRI_PLACES=370, PETRI_TRANSITIONS=443} [2023-08-30 11:35:57,370 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 331 predicate places. [2023-08-30 11:35:57,370 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 443 transitions, 6463 flow [2023-08-30 11:35:57,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 80.47368421052632) internal successors, (4587), 57 states have internal predecessors, (4587), 0 states have call successors, (0), 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 11:35:57,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:35:57,371 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:35:57,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-08-30 11:35:57,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-08-30 11:35:57,571 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:35:57,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:35:57,571 INFO L85 PathProgramCache]: Analyzing trace with hash 372059218, now seen corresponding path program 9 times [2023-08-30 11:35:57,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:35:57,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809822789] [2023-08-30 11:35:57,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:35:57,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:35:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:35:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:58,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:35:58,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809822789] [2023-08-30 11:35:58,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809822789] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:35:58,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866219429] [2023-08-30 11:35:58,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:35:58,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:35:58,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:35:58,092 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:35:58,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-08-30 11:35:58,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-08-30 11:35:58,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:35:58,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 11:35:58,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:35:58,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 11:35:59,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:35:59,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:35:59,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:35:59,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:35:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:59,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:36:00,558 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:36:00,559 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 31 treesize of output 32 [2023-08-30 11:36:00,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:36:00,565 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 89 treesize of output 81 [2023-08-30 11:36:00,568 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 68 treesize of output 56 [2023-08-30 11:36:00,571 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 30 treesize of output 24 [2023-08-30 11:36:01,306 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:36:01,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866219429] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:36:01,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:36:01,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2023-08-30 11:36:01,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966981792] [2023-08-30 11:36:01,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:36:01,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-08-30 11:36:01,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:36:01,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-08-30 11:36:01,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=3086, Unknown=5, NotChecked=0, Total=3422 [2023-08-30 11:36:05,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 11:36:07,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 248 [2023-08-30 11:36:07,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 443 transitions, 6463 flow. Second operand has 59 states, 59 states have (on average 71.47457627118644) internal successors, (4217), 59 states have internal predecessors, (4217), 0 states have call successors, (0), 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 11:36:07,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:36:07,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 248 [2023-08-30 11:36:07,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:36:08,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 11:37:11,847 INFO L130 PetriNetUnfolder]: 27697/48675 cut-off events. [2023-08-30 11:37:11,848 INFO L131 PetriNetUnfolder]: For 523244/523622 co-relation queries the response was YES. [2023-08-30 11:37:12,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372658 conditions, 48675 events. 27697/48675 cut-off events. For 523244/523622 co-relation queries the response was YES. Maximal size of possible extension queue 1046. Compared 411738 event pairs, 1239 based on Foata normal form. 1564/49792 useless extension candidates. Maximal degree in co-relation 372606. Up to 13781 conditions per place. [2023-08-30 11:37:12,381 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 4292 selfloop transitions, 124 changer transitions 277/4699 dead transitions. [2023-08-30 11:37:12,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 4699 transitions, 92242 flow [2023-08-30 11:37:12,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-08-30 11:37:12,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2023-08-30 11:37:12,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 6644 transitions. [2023-08-30 11:37:12,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31893241167434716 [2023-08-30 11:37:12,385 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 6644 transitions. [2023-08-30 11:37:12,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 6644 transitions. [2023-08-30 11:37:12,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:37:12,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 6644 transitions. [2023-08-30 11:37:12,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 79.0952380952381) internal successors, (6644), 84 states have internal predecessors, (6644), 0 states have call successors, (0), 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 11:37:12,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 248.0) internal successors, (21080), 85 states have internal predecessors, (21080), 0 states have call successors, (0), 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 11:37:12,398 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 248.0) internal successors, (21080), 85 states have internal predecessors, (21080), 0 states have call successors, (0), 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 11:37:12,398 INFO L175 Difference]: Start difference. First operand has 370 places, 443 transitions, 6463 flow. Second operand 84 states and 6644 transitions. [2023-08-30 11:37:12,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 4699 transitions, 92242 flow [2023-08-30 11:37:14,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 4699 transitions, 91944 flow, removed 3 selfloop flow, removed 27 redundant places. [2023-08-30 11:37:14,658 INFO L231 Difference]: Finished difference. Result has 429 places, 525 transitions, 7542 flow [2023-08-30 11:37:14,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=6330, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=7542, PETRI_PLACES=429, PETRI_TRANSITIONS=525} [2023-08-30 11:37:14,659 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 390 predicate places. [2023-08-30 11:37:14,659 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 525 transitions, 7542 flow [2023-08-30 11:37:14,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 71.47457627118644) internal successors, (4217), 59 states have internal predecessors, (4217), 0 states have call successors, (0), 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 11:37:14,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:37:14,660 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2023-08-30 11:37:14,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-08-30 11:37:14,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:37:14,861 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:37:14,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:37:14,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1477885203, now seen corresponding path program 10 times [2023-08-30 11:37:14,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:37:14,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771336135] [2023-08-30 11:37:14,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:14,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:37:14,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:15,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:37:15,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771336135] [2023-08-30 11:37:15,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771336135] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:37:15,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029374146] [2023-08-30 11:37:15,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:37:15,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:37:15,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:37:15,096 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:37:15,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-08-30 11:37:15,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:37:15,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:37:15,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 11:37:15,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:37:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 64 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:15,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:37:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 64 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:15,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029374146] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:37:15,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:37:15,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 47 [2023-08-30 11:37:15,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682736188] [2023-08-30 11:37:15,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:37:15,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-30 11:37:15,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:37:15,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-30 11:37:15,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=1786, Unknown=0, NotChecked=0, Total=2352 [2023-08-30 11:37:16,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 11:37:16,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 525 transitions, 7542 flow. Second operand has 49 states, 49 states have (on average 97.48979591836735) internal successors, (4777), 49 states have internal predecessors, (4777), 0 states have call successors, (0), 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 11:37:16,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:37:16,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 11:37:16,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:37:23,968 INFO L130 PetriNetUnfolder]: 25925/45794 cut-off events. [2023-08-30 11:37:23,969 INFO L131 PetriNetUnfolder]: For 482664/483680 co-relation queries the response was YES. [2023-08-30 11:37:24,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349675 conditions, 45794 events. 25925/45794 cut-off events. For 482664/483680 co-relation queries the response was YES. Maximal size of possible extension queue 1025. Compared 388220 event pairs, 9652 based on Foata normal form. 1468/46537 useless extension candidates. Maximal degree in co-relation 349621. Up to 16333 conditions per place. [2023-08-30 11:37:24,465 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 961 selfloop transitions, 128 changer transitions 180/1272 dead transitions. [2023-08-30 11:37:24,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 1272 transitions, 19755 flow [2023-08-30 11:37:24,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 11:37:24,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 11:37:24,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3115 transitions. [2023-08-30 11:37:24,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41868279569892475 [2023-08-30 11:37:24,467 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3115 transitions. [2023-08-30 11:37:24,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3115 transitions. [2023-08-30 11:37:24,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:37:24,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3115 transitions. [2023-08-30 11:37:24,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 103.83333333333333) internal successors, (3115), 30 states have internal predecessors, (3115), 0 states have call successors, (0), 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 11:37:24,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 248.0) internal successors, (7688), 31 states have internal predecessors, (7688), 0 states have call successors, (0), 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 11:37:24,472 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 248.0) internal successors, (7688), 31 states have internal predecessors, (7688), 0 states have call successors, (0), 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 11:37:24,472 INFO L175 Difference]: Start difference. First operand has 429 places, 525 transitions, 7542 flow. Second operand 30 states and 3115 transitions. [2023-08-30 11:37:24,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 1272 transitions, 19755 flow [2023-08-30 11:37:27,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 1272 transitions, 18749 flow, removed 23 selfloop flow, removed 26 redundant places. [2023-08-30 11:37:27,171 INFO L231 Difference]: Finished difference. Result has 433 places, 504 transitions, 7256 flow [2023-08-30 11:37:27,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=7078, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=7256, PETRI_PLACES=433, PETRI_TRANSITIONS=504} [2023-08-30 11:37:27,172 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 394 predicate places. [2023-08-30 11:37:27,172 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 504 transitions, 7256 flow [2023-08-30 11:37:27,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 97.48979591836735) internal successors, (4777), 49 states have internal predecessors, (4777), 0 states have call successors, (0), 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 11:37:27,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:37:27,172 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 8, 1, 1, 1, 1, 1] [2023-08-30 11:37:27,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-08-30 11:37:27,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:37:27,373 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:37:27,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:37:27,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1239798831, now seen corresponding path program 10 times [2023-08-30 11:37:27,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:37:27,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447233305] [2023-08-30 11:37:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:27,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:37:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:27,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:37:27,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447233305] [2023-08-30 11:37:27,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447233305] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:37:27,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720901695] [2023-08-30 11:37:27,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:37:27,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:37:27,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:37:27,936 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:37:27,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-08-30 11:37:28,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:37:28,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:37:28,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-30 11:37:28,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:37:28,469 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 11:37:28,500 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 11:37:28,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:37:28,535 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 11:37:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:28,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:37:29,196 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:37:29,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 38 [2023-08-30 11:37:29,202 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:37:29,202 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 11:37:29,211 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 11:37:29,494 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:29,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720901695] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:37:29,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:37:29,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2023-08-30 11:37:29,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165507115] [2023-08-30 11:37:29,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:37:29,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-08-30 11:37:29,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:37:29,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-08-30 11:37:29,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=3680, Unknown=21, NotChecked=0, Total=3906 [2023-08-30 11:37:32,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 248 [2023-08-30 11:37:32,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 504 transitions, 7256 flow. Second operand has 63 states, 63 states have (on average 83.42857142857143) internal successors, (5256), 63 states have internal predecessors, (5256), 0 states have call successors, (0), 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 11:37:32,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:37:32,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 248 [2023-08-30 11:37:32,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:37:42,169 INFO L130 PetriNetUnfolder]: 23007/40809 cut-off events. [2023-08-30 11:37:42,169 INFO L131 PetriNetUnfolder]: For 404986/405945 co-relation queries the response was YES. [2023-08-30 11:37:42,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301718 conditions, 40809 events. 23007/40809 cut-off events. For 404986/405945 co-relation queries the response was YES. Maximal size of possible extension queue 899. Compared 337215 event pairs, 11710 based on Foata normal form. 967/39095 useless extension candidates. Maximal degree in co-relation 301663. Up to 22689 conditions per place. [2023-08-30 11:37:42,561 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 462 selfloop transitions, 303 changer transitions 0/768 dead transitions. [2023-08-30 11:37:42,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 768 transitions, 12180 flow [2023-08-30 11:37:42,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-30 11:37:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-30 11:37:42,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 6486 transitions. [2023-08-30 11:37:42,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3441213921901528 [2023-08-30 11:37:42,565 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 6486 transitions. [2023-08-30 11:37:42,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 6486 transitions. [2023-08-30 11:37:42,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:37:42,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 6486 transitions. [2023-08-30 11:37:42,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 85.34210526315789) internal successors, (6486), 76 states have internal predecessors, (6486), 0 states have call successors, (0), 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 11:37:42,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 248.0) internal successors, (19096), 77 states have internal predecessors, (19096), 0 states have call successors, (0), 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 11:37:42,577 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 248.0) internal successors, (19096), 77 states have internal predecessors, (19096), 0 states have call successors, (0), 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 11:37:42,577 INFO L175 Difference]: Start difference. First operand has 433 places, 504 transitions, 7256 flow. Second operand 76 states and 6486 transitions. [2023-08-30 11:37:42,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 768 transitions, 12180 flow [2023-08-30 11:37:45,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 768 transitions, 12020 flow, removed 7 selfloop flow, removed 18 redundant places. [2023-08-30 11:37:45,248 INFO L231 Difference]: Finished difference. Result has 491 places, 576 transitions, 8632 flow [2023-08-30 11:37:45,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=7104, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=8632, PETRI_PLACES=491, PETRI_TRANSITIONS=576} [2023-08-30 11:37:45,249 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 452 predicate places. [2023-08-30 11:37:45,249 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 576 transitions, 8632 flow [2023-08-30 11:37:45,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 83.42857142857143) internal successors, (5256), 63 states have internal predecessors, (5256), 0 states have call successors, (0), 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 11:37:45,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:37:45,250 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:37:45,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-08-30 11:37:45,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:37:45,457 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:37:45,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:37:45,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1066648089, now seen corresponding path program 12 times [2023-08-30 11:37:45,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:37:45,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91433012] [2023-08-30 11:37:45,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:45,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:37:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:45,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:37:45,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91433012] [2023-08-30 11:37:45,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91433012] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:37:45,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935563467] [2023-08-30 11:37:45,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:37:45,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:37:45,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:37:45,699 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:37:45,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-08-30 11:37:46,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-08-30 11:37:46,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:37:46,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 11:37:46,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:37:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 64 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:46,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:37:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 64 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:46,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935563467] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:37:46,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:37:46,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 47 [2023-08-30 11:37:46,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224462238] [2023-08-30 11:37:46,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:37:46,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-30 11:37:46,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:37:46,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-30 11:37:46,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=1786, Unknown=0, NotChecked=0, Total=2352 [2023-08-30 11:37:47,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 11:37:47,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 576 transitions, 8632 flow. Second operand has 49 states, 49 states have (on average 97.46938775510205) internal successors, (4776), 49 states have internal predecessors, (4776), 0 states have call successors, (0), 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 11:37:47,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:37:47,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 11:37:47,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:37:54,553 INFO L130 PetriNetUnfolder]: 22093/39474 cut-off events. [2023-08-30 11:37:54,553 INFO L131 PetriNetUnfolder]: For 445202/445580 co-relation queries the response was YES. [2023-08-30 11:37:55,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293948 conditions, 39474 events. 22093/39474 cut-off events. For 445202/445580 co-relation queries the response was YES. Maximal size of possible extension queue 848. Compared 324524 event pairs, 8804 based on Foata normal form. 866/37758 useless extension candidates. Maximal degree in co-relation 293886. Up to 21251 conditions per place. [2023-08-30 11:37:55,178 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 476 selfloop transitions, 28 changer transitions 800/1309 dead transitions. [2023-08-30 11:37:55,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 1309 transitions, 24843 flow [2023-08-30 11:37:55,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 11:37:55,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 11:37:55,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2238 transitions. [2023-08-30 11:37:55,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41019061583577715 [2023-08-30 11:37:55,182 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2238 transitions. [2023-08-30 11:37:55,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2238 transitions. [2023-08-30 11:37:55,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:37:55,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2238 transitions. [2023-08-30 11:37:55,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 101.72727272727273) internal successors, (2238), 22 states have internal predecessors, (2238), 0 states have call successors, (0), 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 11:37:55,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 248.0) internal successors, (5704), 23 states have internal predecessors, (5704), 0 states have call successors, (0), 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 11:37:55,187 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 248.0) internal successors, (5704), 23 states have internal predecessors, (5704), 0 states have call successors, (0), 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 11:37:55,187 INFO L175 Difference]: Start difference. First operand has 491 places, 576 transitions, 8632 flow. Second operand 22 states and 2238 transitions. [2023-08-30 11:37:55,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 1309 transitions, 24843 flow [2023-08-30 11:37:57,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 1309 transitions, 24656 flow, removed 32 selfloop flow, removed 29 redundant places. [2023-08-30 11:37:57,791 INFO L231 Difference]: Finished difference. Result has 483 places, 409 transitions, 5978 flow [2023-08-30 11:37:57,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=8404, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5978, PETRI_PLACES=483, PETRI_TRANSITIONS=409} [2023-08-30 11:37:57,792 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 444 predicate places. [2023-08-30 11:37:57,792 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 409 transitions, 5978 flow [2023-08-30 11:37:57,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 97.46938775510205) internal successors, (4776), 49 states have internal predecessors, (4776), 0 states have call successors, (0), 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 11:37:57,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:37:57,793 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2023-08-30 11:37:57,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-08-30 11:37:57,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2023-08-30 11:37:57,994 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:37:57,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:37:57,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1531596009, now seen corresponding path program 11 times [2023-08-30 11:37:57,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:37:57,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543577562] [2023-08-30 11:37:57,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:57,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:37:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:58,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:37:58,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543577562] [2023-08-30 11:37:58,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543577562] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:37:58,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271205851] [2023-08-30 11:37:58,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:37:58,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:37:58,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:37:58,624 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:37:58,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-08-30 11:37:58,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-08-30 11:37:58,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:37:58,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-30 11:37:58,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:37:59,262 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 11:37:59,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:37:59,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:37:59,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:37:59,399 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 11:37:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:59,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:38:00,050 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3138 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3138) c_~A~0.base) (+ c_~A~0.offset 32)) 4294967296)) is different from false [2023-08-30 11:38:00,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:38:00,127 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 11:38:00,132 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:38:00,132 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 71 treesize of output 65 [2023-08-30 11:38:00,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-08-30 11:38:00,137 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 11:38:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:38:00,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271205851] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:38:00,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:38:00,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 62 [2023-08-30 11:38:00,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849007301] [2023-08-30 11:38:00,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:38:00,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-08-30 11:38:00,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:38:00,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-08-30 11:38:00,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=3698, Unknown=21, NotChecked=122, Total=4032 [2023-08-30 11:38:00,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:38:00,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 409 transitions, 5978 flow. Second operand has 64 states, 64 states have (on average 80.4375) internal successors, (5148), 64 states have internal predecessors, (5148), 0 states have call successors, (0), 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 11:38:00,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:38:00,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:38:00,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:38:09,868 INFO L130 PetriNetUnfolder]: 18170/32656 cut-off events. [2023-08-30 11:38:09,869 INFO L131 PetriNetUnfolder]: For 379997/380891 co-relation queries the response was YES. [2023-08-30 11:38:10,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254423 conditions, 32656 events. 18170/32656 cut-off events. For 379997/380891 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 266645 event pairs, 5912 based on Foata normal form. 1844/34004 useless extension candidates. Maximal degree in co-relation 254361. Up to 9333 conditions per place. [2023-08-30 11:38:10,321 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 1668 selfloop transitions, 181 changer transitions 0/1851 dead transitions. [2023-08-30 11:38:10,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 1851 transitions, 28189 flow [2023-08-30 11:38:10,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 11:38:10,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 11:38:10,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2800 transitions. [2023-08-30 11:38:10,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3528225806451613 [2023-08-30 11:38:10,323 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2800 transitions. [2023-08-30 11:38:10,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2800 transitions. [2023-08-30 11:38:10,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:38:10,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2800 transitions. [2023-08-30 11:38:10,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 87.5) internal successors, (2800), 32 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:10,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 248.0) internal successors, (8184), 33 states have internal predecessors, (8184), 0 states have call successors, (0), 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 11:38:10,328 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 248.0) internal successors, (8184), 33 states have internal predecessors, (8184), 0 states have call successors, (0), 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 11:38:10,328 INFO L175 Difference]: Start difference. First operand has 483 places, 409 transitions, 5978 flow. Second operand 32 states and 2800 transitions. [2023-08-30 11:38:10,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 1851 transitions, 28189 flow [2023-08-30 11:38:14,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 1851 transitions, 27141 flow, removed 24 selfloop flow, removed 24 redundant places. [2023-08-30 11:38:14,735 INFO L231 Difference]: Finished difference. Result has 395 places, 420 transitions, 5998 flow [2023-08-30 11:38:14,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=5336, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=5998, PETRI_PLACES=395, PETRI_TRANSITIONS=420} [2023-08-30 11:38:14,735 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 356 predicate places. [2023-08-30 11:38:14,736 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 420 transitions, 5998 flow [2023-08-30 11:38:14,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 80.4375) internal successors, (5148), 64 states have internal predecessors, (5148), 0 states have call successors, (0), 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 11:38:14,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:38:14,736 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 8, 1, 1, 1, 1, 1] [2023-08-30 11:38:14,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-08-30 11:38:14,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2023-08-30 11:38:14,943 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:38:14,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:38:14,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1239798832, now seen corresponding path program 8 times [2023-08-30 11:38:14,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:38:14,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106264545] [2023-08-30 11:38:14,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:38:14,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:38:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:38:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:38:15,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:38:15,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106264545] [2023-08-30 11:38:15,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106264545] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:38:15,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107463081] [2023-08-30 11:38:15,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:38:15,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:38:15,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:38:15,562 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:38:15,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-08-30 11:38:15,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:38:15,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:38:15,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-30 11:38:15,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:38:16,155 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 11:38:16,193 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 21 treesize of output 20 [2023-08-30 11:38:16,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:38:16,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:38:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:38:16,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:38:17,010 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:38:17,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 40 [2023-08-30 11:38:17,015 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:38:17,015 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 11:38:17,023 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 11:38:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:38:17,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107463081] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:38:17,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:38:17,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2023-08-30 11:38:17,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233866793] [2023-08-30 11:38:17,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:38:17,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-08-30 11:38:17,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:38:17,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-08-30 11:38:17,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=3669, Unknown=31, NotChecked=0, Total=3906 [2023-08-30 11:38:17,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 248 [2023-08-30 11:38:17,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 420 transitions, 5998 flow. Second operand has 63 states, 63 states have (on average 83.42857142857143) internal successors, (5256), 63 states have internal predecessors, (5256), 0 states have call successors, (0), 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 11:38:17,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:38:17,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 248 [2023-08-30 11:38:17,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:38:25,857 INFO L130 PetriNetUnfolder]: 18137/32555 cut-off events. [2023-08-30 11:38:25,858 INFO L131 PetriNetUnfolder]: For 275075/275814 co-relation queries the response was YES. [2023-08-30 11:38:26,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251885 conditions, 32555 events. 18137/32555 cut-off events. For 275075/275814 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 262275 event pairs, 9653 based on Foata normal form. 741/29691 useless extension candidates. Maximal degree in co-relation 251830. Up to 25067 conditions per place. [2023-08-30 11:38:26,144 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 285 selfloop transitions, 237 changer transitions 0/524 dead transitions. [2023-08-30 11:38:26,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 524 transitions, 8537 flow [2023-08-30 11:38:26,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-08-30 11:38:26,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2023-08-30 11:38:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 6282 transitions. [2023-08-30 11:38:26,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3423060156931125 [2023-08-30 11:38:26,148 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 6282 transitions. [2023-08-30 11:38:26,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 6282 transitions. [2023-08-30 11:38:26,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:38:26,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 6282 transitions. [2023-08-30 11:38:26,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 84.89189189189189) internal successors, (6282), 74 states have internal predecessors, (6282), 0 states have call successors, (0), 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 11:38:26,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 248.0) internal successors, (18600), 75 states have internal predecessors, (18600), 0 states have call successors, (0), 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 11:38:26,159 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 248.0) internal successors, (18600), 75 states have internal predecessors, (18600), 0 states have call successors, (0), 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 11:38:26,159 INFO L175 Difference]: Start difference. First operand has 395 places, 420 transitions, 5998 flow. Second operand 74 states and 6282 transitions. [2023-08-30 11:38:26,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 524 transitions, 8537 flow [2023-08-30 11:38:27,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 524 transitions, 8057 flow, removed 12 selfloop flow, removed 31 redundant places. [2023-08-30 11:38:27,044 INFO L231 Difference]: Finished difference. Result has 437 places, 418 transitions, 5985 flow [2023-08-30 11:38:27,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=5486, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=5985, PETRI_PLACES=437, PETRI_TRANSITIONS=418} [2023-08-30 11:38:27,045 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 398 predicate places. [2023-08-30 11:38:27,045 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 418 transitions, 5985 flow [2023-08-30 11:38:27,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 83.42857142857143) internal successors, (5256), 63 states have internal predecessors, (5256), 0 states have call successors, (0), 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 11:38:27,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:38:27,046 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 8, 1, 1, 1, 1, 1, 1] [2023-08-30 11:38:27,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-08-30 11:38:27,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2023-08-30 11:38:27,251 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:38:27,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:38:27,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1817930288, now seen corresponding path program 9 times [2023-08-30 11:38:27,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:38:27,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314783783] [2023-08-30 11:38:27,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:38:27,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:38:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:38:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:38:28,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:38:28,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314783783] [2023-08-30 11:38:28,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314783783] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:38:28,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741652342] [2023-08-30 11:38:28,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:38:28,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:38:28,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:38:28,017 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:38:28,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-08-30 11:38:28,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-08-30 11:38:28,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:38:28,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-30 11:38:28,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:38:29,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:38:29,283 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 21 treesize of output 20 [2023-08-30 11:38:29,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:38:29,332 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 11:38:29,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:38:29,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:38:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:38:29,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:38:30,034 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3277 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3277) c_~A~0.base) (+ c_~A~0.offset 32)) 9223372039002259456))) is different from false [2023-08-30 11:38:32,267 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:38:32,267 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 37 treesize of output 43 [2023-08-30 11:38:32,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:38:32,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 147 [2023-08-30 11:38:32,277 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 29 treesize of output 25 [2023-08-30 11:38:32,294 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 20 [2023-08-30 11:38:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:38:32,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741652342] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:38:32,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:38:32,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 64 [2023-08-30 11:38:32,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969274425] [2023-08-30 11:38:32,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:38:32,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-08-30 11:38:32,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:38:32,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-08-30 11:38:32,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=3940, Unknown=7, NotChecked=126, Total=4290 [2023-08-30 11:38:32,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:38:32,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 418 transitions, 5985 flow. Second operand has 66 states, 66 states have (on average 80.42424242424242) internal successors, (5308), 66 states have internal predecessors, (5308), 0 states have call successors, (0), 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 11:38:32,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:38:32,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:38:32,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:38:47,853 INFO L130 PetriNetUnfolder]: 27151/48796 cut-off events. [2023-08-30 11:38:47,853 INFO L131 PetriNetUnfolder]: For 391990/393539 co-relation queries the response was YES. [2023-08-30 11:38:48,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372515 conditions, 48796 events. 27151/48796 cut-off events. For 391990/393539 co-relation queries the response was YES. Maximal size of possible extension queue 1048. Compared 422481 event pairs, 8769 based on Foata normal form. 1787/45338 useless extension candidates. Maximal degree in co-relation 372462. Up to 13975 conditions per place. [2023-08-30 11:38:48,408 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 2750 selfloop transitions, 239 changer transitions 0/2991 dead transitions. [2023-08-30 11:38:48,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 2991 transitions, 44916 flow [2023-08-30 11:38:48,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-08-30 11:38:48,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2023-08-30 11:38:48,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 6610 transitions. [2023-08-30 11:38:48,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.360178727114211 [2023-08-30 11:38:48,414 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 6610 transitions. [2023-08-30 11:38:48,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 6610 transitions. [2023-08-30 11:38:48,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:38:48,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 6610 transitions. [2023-08-30 11:38:48,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 89.32432432432432) internal successors, (6610), 74 states have internal predecessors, (6610), 0 states have call successors, (0), 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 11:38:48,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 248.0) internal successors, (18600), 75 states have internal predecessors, (18600), 0 states have call successors, (0), 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 11:38:48,431 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 248.0) internal successors, (18600), 75 states have internal predecessors, (18600), 0 states have call successors, (0), 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 11:38:48,431 INFO L175 Difference]: Start difference. First operand has 437 places, 418 transitions, 5985 flow. Second operand 74 states and 6610 transitions. [2023-08-30 11:38:48,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 2991 transitions, 44916 flow [2023-08-30 11:38:49,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 2991 transitions, 44387 flow, removed 4 selfloop flow, removed 69 redundant places. [2023-08-30 11:38:49,838 INFO L231 Difference]: Finished difference. Result has 441 places, 472 transitions, 6895 flow [2023-08-30 11:38:49,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=5503, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=6895, PETRI_PLACES=441, PETRI_TRANSITIONS=472} [2023-08-30 11:38:49,839 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 402 predicate places. [2023-08-30 11:38:49,839 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 472 transitions, 6895 flow [2023-08-30 11:38:49,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 80.42424242424242) internal successors, (5308), 66 states have internal predecessors, (5308), 0 states have call successors, (0), 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 11:38:49,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:38:49,840 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:38:49,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2023-08-30 11:38:50,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-08-30 11:38:50,046 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:38:50,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:38:50,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1158550405, now seen corresponding path program 13 times [2023-08-30 11:38:50,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:38:50,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255112509] [2023-08-30 11:38:50,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:38:50,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:38:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:38:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:38:50,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:38:50,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255112509] [2023-08-30 11:38:50,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255112509] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:38:50,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684623810] [2023-08-30 11:38:50,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:38:50,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:38:50,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:38:50,667 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:38:50,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-08-30 11:38:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:38:51,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-30 11:38:51,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:38:51,310 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 11:38:51,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:38:51,357 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 11:38:51,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:38:51,398 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 11:38:51,790 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:38:51,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:38:52,244 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3342 (Array Int Int)) (v_ArrVal_3343 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_3342) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3343) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 32 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456)) is different from false [2023-08-30 11:38:52,250 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:38:52,250 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 11:38:52,255 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:38:52,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 129 [2023-08-30 11:38:52,260 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 11:38:52,262 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 11:38:52,679 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2023-08-30 11:38:52,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684623810] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:38:52,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:38:52,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 63 [2023-08-30 11:38:52,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9651328] [2023-08-30 11:38:52,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:38:52,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-08-30 11:38:52,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:38:52,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-08-30 11:38:52,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3832, Unknown=9, NotChecked=124, Total=4160 [2023-08-30 11:38:52,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 11:38:52,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 472 transitions, 6895 flow. Second operand has 65 states, 65 states have (on average 80.47692307692307) internal successors, (5231), 65 states have internal predecessors, (5231), 0 states have call successors, (0), 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 11:38:52,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:38:52,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 11:38:52,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:39:07,355 INFO L130 PetriNetUnfolder]: 30855/55527 cut-off events. [2023-08-30 11:39:07,355 INFO L131 PetriNetUnfolder]: For 544821/544821 co-relation queries the response was YES. [2023-08-30 11:39:07,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426810 conditions, 55527 events. 30855/55527 cut-off events. For 544821/544821 co-relation queries the response was YES. Maximal size of possible extension queue 1140. Compared 483008 event pairs, 4580 based on Foata normal form. 1436/51692 useless extension candidates. Maximal degree in co-relation 426757. Up to 15607 conditions per place. [2023-08-30 11:39:08,091 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 3057 selfloop transitions, 77 changer transitions 0/3140 dead transitions. [2023-08-30 11:39:08,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 3140 transitions, 63629 flow [2023-08-30 11:39:08,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 11:39:08,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 11:39:08,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2782 transitions. [2023-08-30 11:39:08,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35055443548387094 [2023-08-30 11:39:08,094 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2782 transitions. [2023-08-30 11:39:08,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2782 transitions. [2023-08-30 11:39:08,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:39:08,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2782 transitions. [2023-08-30 11:39:08,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 86.9375) internal successors, (2782), 32 states have internal predecessors, (2782), 0 states have call successors, (0), 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 11:39:08,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 248.0) internal successors, (8184), 33 states have internal predecessors, (8184), 0 states have call successors, (0), 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 11:39:08,102 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 248.0) internal successors, (8184), 33 states have internal predecessors, (8184), 0 states have call successors, (0), 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 11:39:08,102 INFO L175 Difference]: Start difference. First operand has 441 places, 472 transitions, 6895 flow. Second operand 32 states and 2782 transitions. [2023-08-30 11:39:08,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 3140 transitions, 63629 flow [2023-08-30 11:39:09,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 3140 transitions, 59739 flow, removed 214 selfloop flow, removed 41 redundant places. [2023-08-30 11:39:09,524 INFO L231 Difference]: Finished difference. Result has 433 places, 479 transitions, 6814 flow [2023-08-30 11:39:09,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=6513, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=6814, PETRI_PLACES=433, PETRI_TRANSITIONS=479} [2023-08-30 11:39:09,527 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 394 predicate places. [2023-08-30 11:39:09,527 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 479 transitions, 6814 flow [2023-08-30 11:39:09,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 80.47692307692307) internal successors, (5231), 65 states have internal predecessors, (5231), 0 states have call successors, (0), 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 11:39:09,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:39:09,528 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1] [2023-08-30 11:39:09,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2023-08-30 11:39:09,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:39:09,734 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:39:09,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:39:09,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1309999401, now seen corresponding path program 12 times [2023-08-30 11:39:09,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:39:09,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630335412] [2023-08-30 11:39:09,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:39:09,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:39:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:39:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 64 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:39:10,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:39:10,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630335412] [2023-08-30 11:39:10,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630335412] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:39:10,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890319424] [2023-08-30 11:39:10,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:39:10,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:39:10,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:39:10,137 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:39:10,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-08-30 11:39:10,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-08-30 11:39:10,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:39:10,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 11:39:10,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:39:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 81 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:39:11,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:39:11,534 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 81 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:39:11,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890319424] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:39:11,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:39:11,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 52 [2023-08-30 11:39:11,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315977817] [2023-08-30 11:39:11,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:39:11,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-08-30 11:39:11,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:39:11,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-08-30 11:39:11,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2023-08-30 11:39:11,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 11:39:11,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 479 transitions, 6814 flow. Second operand has 54 states, 54 states have (on average 97.48148148148148) internal successors, (5264), 54 states have internal predecessors, (5264), 0 states have call successors, (0), 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 11:39:11,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:39:11,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 11:39:11,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:39:21,872 INFO L130 PetriNetUnfolder]: 29242/52691 cut-off events. [2023-08-30 11:39:21,872 INFO L131 PetriNetUnfolder]: For 493827/495393 co-relation queries the response was YES. [2023-08-30 11:39:22,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414649 conditions, 52691 events. 29242/52691 cut-off events. For 493827/495393 co-relation queries the response was YES. Maximal size of possible extension queue 1089. Compared 460340 event pairs, 11858 based on Foata normal form. 1821/53583 useless extension candidates. Maximal degree in co-relation 414596. Up to 21054 conditions per place. [2023-08-30 11:39:22,528 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 1081 selfloop transitions, 97 changer transitions 189/1369 dead transitions. [2023-08-30 11:39:22,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 1369 transitions, 22300 flow [2023-08-30 11:39:22,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 11:39:22,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 11:39:22,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3445 transitions. [2023-08-30 11:39:22,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42094330400782015 [2023-08-30 11:39:22,531 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3445 transitions. [2023-08-30 11:39:22,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3445 transitions. [2023-08-30 11:39:22,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:39:22,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3445 transitions. [2023-08-30 11:39:22,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 104.39393939393939) internal successors, (3445), 33 states have internal predecessors, (3445), 0 states have call successors, (0), 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 11:39:22,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 248.0) internal successors, (8432), 34 states have internal predecessors, (8432), 0 states have call successors, (0), 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 11:39:22,536 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 248.0) internal successors, (8432), 34 states have internal predecessors, (8432), 0 states have call successors, (0), 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 11:39:22,536 INFO L175 Difference]: Start difference. First operand has 433 places, 479 transitions, 6814 flow. Second operand 33 states and 3445 transitions. [2023-08-30 11:39:22,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 1369 transitions, 22300 flow [2023-08-30 11:39:23,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 1369 transitions, 20710 flow, removed 23 selfloop flow, removed 31 redundant places. [2023-08-30 11:39:23,628 INFO L231 Difference]: Finished difference. Result has 432 places, 463 transitions, 6566 flow [2023-08-30 11:39:23,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=6447, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=6566, PETRI_PLACES=432, PETRI_TRANSITIONS=463} [2023-08-30 11:39:23,629 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 393 predicate places. [2023-08-30 11:39:23,629 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 463 transitions, 6566 flow [2023-08-30 11:39:23,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 97.48148148148148) internal successors, (5264), 54 states have internal predecessors, (5264), 0 states have call successors, (0), 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 11:39:23,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:39:23,630 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1] [2023-08-30 11:39:23,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-08-30 11:39:23,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:39:23,837 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:39:23,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:39:23,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1740717122, now seen corresponding path program 9 times [2023-08-30 11:39:23,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:39:23,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236497704] [2023-08-30 11:39:23,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:39:23,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:39:23,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:39:24,417 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:39:24,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:39:24,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236497704] [2023-08-30 11:39:24,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236497704] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:39:24,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224653305] [2023-08-30 11:39:24,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:39:24,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:39:24,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:39:24,418 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:39:24,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-08-30 11:39:25,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-08-30 11:39:25,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:39:25,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-30 11:39:25,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:39:25,877 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 11:39:25,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:39:25,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:39:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 81 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:39:26,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:39:27,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:39:27,170 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 28 treesize of output 29 [2023-08-30 11:39:27,176 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:39:27,176 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 47 treesize of output 39 [2023-08-30 11:39:27,179 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 11:39:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:39:28,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224653305] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:39:28,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:39:28,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 66 [2023-08-30 11:39:28,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988760419] [2023-08-30 11:39:28,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:39:28,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-08-30 11:39:28,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:39:28,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-08-30 11:39:28,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=4099, Unknown=0, NotChecked=0, Total=4556 [2023-08-30 11:39:33,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 248 [2023-08-30 11:39:33,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 463 transitions, 6566 flow. Second operand has 68 states, 68 states have (on average 86.45588235294117) internal successors, (5879), 68 states have internal predecessors, (5879), 0 states have call successors, (0), 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 11:39:33,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:39:33,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 248 [2023-08-30 11:39:33,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:39:34,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 11:39:39,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 11:40:05,453 INFO L130 PetriNetUnfolder]: 35439/61254 cut-off events. [2023-08-30 11:40:05,454 INFO L131 PetriNetUnfolder]: For 524182/526144 co-relation queries the response was YES. [2023-08-30 11:40:06,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479425 conditions, 61254 events. 35439/61254 cut-off events. For 524182/526144 co-relation queries the response was YES. Maximal size of possible extension queue 1194. Compared 519570 event pairs, 7584 based on Foata normal form. 2102/58806 useless extension candidates. Maximal degree in co-relation 479373. Up to 17902 conditions per place. [2023-08-30 11:40:06,281 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 1967 selfloop transitions, 493 changer transitions 9/2471 dead transitions. [2023-08-30 11:40:06,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 2471 transitions, 37911 flow [2023-08-30 11:40:06,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2023-08-30 11:40:06,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2023-08-30 11:40:06,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 15757 transitions. [2023-08-30 11:40:06,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3610016495601173 [2023-08-30 11:40:06,290 INFO L72 ComplementDD]: Start complementDD. Operand 176 states and 15757 transitions. [2023-08-30 11:40:06,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 176 states and 15757 transitions. [2023-08-30 11:40:06,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:40:06,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 176 states and 15757 transitions. [2023-08-30 11:40:06,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 177 states, 176 states have (on average 89.5284090909091) internal successors, (15757), 176 states have internal predecessors, (15757), 0 states have call successors, (0), 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 11:40:06,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 177 states, 177 states have (on average 248.0) internal successors, (43896), 177 states have internal predecessors, (43896), 0 states have call successors, (0), 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 11:40:06,321 INFO L81 ComplementDD]: Finished complementDD. Result has 177 states, 177 states have (on average 248.0) internal successors, (43896), 177 states have internal predecessors, (43896), 0 states have call successors, (0), 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 11:40:06,321 INFO L175 Difference]: Start difference. First operand has 432 places, 463 transitions, 6566 flow. Second operand 176 states and 15757 transitions. [2023-08-30 11:40:06,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 2471 transitions, 37911 flow [2023-08-30 11:40:09,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 2471 transitions, 37526 flow, removed 12 selfloop flow, removed 23 redundant places. [2023-08-30 11:40:09,360 INFO L231 Difference]: Finished difference. Result has 588 places, 632 transitions, 10208 flow [2023-08-30 11:40:09,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=6353, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=176, PETRI_FLOW=10208, PETRI_PLACES=588, PETRI_TRANSITIONS=632} [2023-08-30 11:40:09,360 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 549 predicate places. [2023-08-30 11:40:09,360 INFO L495 AbstractCegarLoop]: Abstraction has has 588 places, 632 transitions, 10208 flow [2023-08-30 11:40:09,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 86.45588235294117) internal successors, (5879), 68 states have internal predecessors, (5879), 0 states have call successors, (0), 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 11:40:09,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:40:09,361 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1] [2023-08-30 11:40:09,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2023-08-30 11:40:09,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-08-30 11:40:09,562 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:40:09,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:40:09,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1740717121, now seen corresponding path program 11 times [2023-08-30 11:40:09,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:40:09,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784389111] [2023-08-30 11:40:09,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:40:09,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:40:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:40:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:40:10,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:40:10,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784389111] [2023-08-30 11:40:10,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784389111] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:40:10,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557028956] [2023-08-30 11:40:10,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:40:10,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:40:10,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:40:10,217 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:40:10,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-08-30 11:40:10,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-08-30 11:40:10,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:40:10,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-30 11:40:10,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:40:10,905 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 11:40:10,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:40:10,945 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 11:40:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:40:11,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:40:11,665 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3535 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_3535) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 36 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-30 11:40:11,671 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:40:11,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-08-30 11:40:11,676 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:40:11,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2023-08-30 11:40:11,679 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 11:40:12,051 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2023-08-30 11:40:12,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557028956] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:40:12,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:40:12,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 64 [2023-08-30 11:40:12,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958949925] [2023-08-30 11:40:12,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:40:12,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-08-30 11:40:12,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:40:12,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-08-30 11:40:12,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=3954, Unknown=1, NotChecked=126, Total=4290 [2023-08-30 11:40:12,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 248 [2023-08-30 11:40:12,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 588 places, 632 transitions, 10208 flow. Second operand has 66 states, 66 states have (on average 83.45454545454545) internal successors, (5508), 66 states have internal predecessors, (5508), 0 states have call successors, (0), 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 11:40:12,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:40:12,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 248 [2023-08-30 11:40:12,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:40:25,660 INFO L130 PetriNetUnfolder]: 35433/61241 cut-off events. [2023-08-30 11:40:25,660 INFO L131 PetriNetUnfolder]: For 574475/576349 co-relation queries the response was YES. [2023-08-30 11:40:26,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498640 conditions, 61241 events. 35433/61241 cut-off events. For 574475/576349 co-relation queries the response was YES. Maximal size of possible extension queue 1206. Compared 511993 event pairs, 16272 based on Foata normal form. 1882/58757 useless extension candidates. Maximal degree in co-relation 498578. Up to 33786 conditions per place. [2023-08-30 11:40:26,686 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 423 selfloop transitions, 357 changer transitions 0/782 dead transitions. [2023-08-30 11:40:26,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 782 transitions, 13790 flow [2023-08-30 11:40:26,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-30 11:40:26,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-30 11:40:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3258 transitions. [2023-08-30 11:40:26,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34571307300509335 [2023-08-30 11:40:26,690 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3258 transitions. [2023-08-30 11:40:26,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3258 transitions. [2023-08-30 11:40:26,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:40:26,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3258 transitions. [2023-08-30 11:40:26,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 85.73684210526316) internal successors, (3258), 38 states have internal predecessors, (3258), 0 states have call successors, (0), 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 11:40:26,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 248.0) internal successors, (9672), 39 states have internal predecessors, (9672), 0 states have call successors, (0), 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 11:40:26,696 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 248.0) internal successors, (9672), 39 states have internal predecessors, (9672), 0 states have call successors, (0), 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 11:40:26,696 INFO L175 Difference]: Start difference. First operand has 588 places, 632 transitions, 10208 flow. Second operand 38 states and 3258 transitions. [2023-08-30 11:40:26,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 782 transitions, 13790 flow [2023-08-30 11:40:30,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 782 transitions, 12979 flow, removed 88 selfloop flow, removed 95 redundant places. [2023-08-30 11:40:30,646 INFO L231 Difference]: Finished difference. Result has 532 places, 633 transitions, 10175 flow [2023-08-30 11:40:30,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=9351, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=10175, PETRI_PLACES=532, PETRI_TRANSITIONS=633} [2023-08-30 11:40:30,647 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 493 predicate places. [2023-08-30 11:40:30,647 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 633 transitions, 10175 flow [2023-08-30 11:40:30,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 83.45454545454545) internal successors, (5508), 66 states have internal predecessors, (5508), 0 states have call successors, (0), 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 11:40:30,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:40:30,648 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:40:30,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-08-30 11:40:30,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:40:30,848 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:40:30,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:40:30,848 INFO L85 PathProgramCache]: Analyzing trace with hash -287445094, now seen corresponding path program 10 times [2023-08-30 11:40:30,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:40:30,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79514269] [2023-08-30 11:40:30,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:40:30,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:40:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:40:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:40:31,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:40:31,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79514269] [2023-08-30 11:40:31,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79514269] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:40:31,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834992378] [2023-08-30 11:40:31,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:40:31,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:40:31,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:40:31,635 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:40:31,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-08-30 11:40:32,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:40:32,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:40:32,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-30 11:40:32,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:40:32,312 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 11:40:32,356 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 21 treesize of output 20 [2023-08-30 11:40:32,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:40:32,403 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 11:40:32,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:40:32,442 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 11:40:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:40:32,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... Killed by 15