./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.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-channel-sum.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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --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 11:30:20,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 11:30:20,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 11:30:20,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 11:30:20,371 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 11:30:20,372 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 11:30:20,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 11:30:20,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 11:30:20,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 11:30:20,377 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 11:30:20,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 11:30:20,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 11:30:20,379 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 11:30:20,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 11:30:20,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 11:30:20,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 11:30:20,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 11:30:20,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 11:30:20,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 11:30:20,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 11:30:20,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 11:30:20,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 11:30:20,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 11:30:20,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 11:30:20,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 11:30:20,413 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 11:30:20,414 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 11:30:20,414 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 11:30:20,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 11:30:20,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 11:30:20,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 11:30:20,418 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 11:30:20,419 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 11:30:20,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 11:30:20,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 11:30:20,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 11:30:20,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 11:30:20,423 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 11:30:20,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 11:30:20,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 11:30:20,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 11:30:20,427 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 11:30:20,463 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 11:30:20,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 11:30:20,465 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 11:30:20,465 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 11:30:20,466 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 11:30:20,466 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 11:30:20,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 11:30:20,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 11:30:20,467 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 11:30:20,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 11:30:20,468 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 11:30:20,468 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 11:30:20,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 11:30:20,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 11:30:20,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 11:30:20,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 11:30:20,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 11:30:20,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 11:30:20,469 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 11:30:20,470 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 11:30:20,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 11:30:20,470 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 11:30:20,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 11:30:20,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 11:30:20,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 11:30:20,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 11:30:20,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:30:20,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 11:30:20,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 11:30:20,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 11:30:20,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 11:30:20,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 11:30:20,472 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 11:30:20,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 11:30:20,473 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 11:30:20,473 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 11:30:20,473 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 11:30:20,473 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 11:30:20,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 11:30:20,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 11:30:20,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 11:30:20,819 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 11:30:20,820 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 11:30:20,821 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-08-30 11:30:21,944 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 11:30:22,130 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 11:30:22,131 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-08-30 11:30:22,139 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59f760d70/5c23bb394c5e43b387c99edeb8d71d4a/FLAG0d1d42b99 [2023-08-30 11:30:22,153 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59f760d70/5c23bb394c5e43b387c99edeb8d71d4a [2023-08-30 11:30:22,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 11:30:22,156 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 11:30:22,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 11:30:22,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 11:30:22,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 11:30:22,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:30:22" (1/1) ... [2023-08-30 11:30:22,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@525a18fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:30:22, skipping insertion in model container [2023-08-30 11:30:22,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:30:22" (1/1) ... [2023-08-30 11:30:22,173 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 11:30:22,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 11:30:22,391 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-channel-sum.wvr.c[2947,2960] [2023-08-30 11:30:22,403 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:30:22,413 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 11:30:22,449 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-channel-sum.wvr.c[2947,2960] [2023-08-30 11:30:22,456 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:30:22,467 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:30:22,468 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:30:22,474 INFO L208 MainTranslator]: Completed translation [2023-08-30 11:30:22,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:30:22 WrapperNode [2023-08-30 11:30:22,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 11:30:22,476 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 11:30:22,477 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 11:30:22,477 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 11:30:22,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:30:22" (1/1) ... [2023-08-30 11:30:22,502 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:30:22" (1/1) ... [2023-08-30 11:30:22,533 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 165 [2023-08-30 11:30:22,534 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 11:30:22,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 11:30:22,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 11:30:22,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 11:30:22,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:30:22" (1/1) ... [2023-08-30 11:30:22,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:30:22" (1/1) ... [2023-08-30 11:30:22,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:30:22" (1/1) ... [2023-08-30 11:30:22,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:30:22" (1/1) ... [2023-08-30 11:30:22,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:30:22" (1/1) ... [2023-08-30 11:30:22,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:30:22" (1/1) ... [2023-08-30 11:30:22,577 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:30:22" (1/1) ... [2023-08-30 11:30:22,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:30:22" (1/1) ... [2023-08-30 11:30:22,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 11:30:22,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 11:30:22,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 11:30:22,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 11:30:22,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:30:22" (1/1) ... [2023-08-30 11:30:22,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:30:22,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:30:22,626 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 11:30:22,648 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 11:30:22,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 11:30:22,669 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 11:30:22,669 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 11:30:22,669 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 11:30:22,670 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 11:30:22,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 11:30:22,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 11:30:22,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 11:30:22,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 11:30:22,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 11:30:22,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 11:30:22,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 11:30:22,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 11:30:22,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 11:30:22,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 11:30:22,673 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 11:30:22,780 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 11:30:22,781 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 11:30:23,037 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 11:30:23,138 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 11:30:23,138 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 11:30:23,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:30:23 BoogieIcfgContainer [2023-08-30 11:30:23,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 11:30:23,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 11:30:23,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 11:30:23,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 11:30:23,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:30:22" (1/3) ... [2023-08-30 11:30:23,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a269522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:30:23, skipping insertion in model container [2023-08-30 11:30:23,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:30:22" (2/3) ... [2023-08-30 11:30:23,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a269522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:30:23, skipping insertion in model container [2023-08-30 11:30:23,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:30:23" (3/3) ... [2023-08-30 11:30:23,148 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2023-08-30 11:30:23,155 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 11:30:23,163 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 11:30:23,163 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-30 11:30:23,164 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 11:30:23,249 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 11:30:23,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 149 transitions, 314 flow [2023-08-30 11:30:23,387 INFO L130 PetriNetUnfolder]: 11/147 cut-off events. [2023-08-30 11:30:23,389 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 11:30:23,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 147 events. 11/147 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 183 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-08-30 11:30:23,395 INFO L82 GeneralOperation]: Start removeDead. Operand has 145 places, 149 transitions, 314 flow [2023-08-30 11:30:23,405 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 131 transitions, 271 flow [2023-08-30 11:30:23,408 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 11:30:23,420 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 131 transitions, 271 flow [2023-08-30 11:30:23,428 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 131 transitions, 271 flow [2023-08-30 11:30:23,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 131 transitions, 271 flow [2023-08-30 11:30:23,483 INFO L130 PetriNetUnfolder]: 10/131 cut-off events. [2023-08-30 11:30:23,485 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 11:30:23,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 131 events. 10/131 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 177 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-08-30 11:30:23,488 INFO L119 LiptonReduction]: Number of co-enabled transitions 1992 [2023-08-30 11:30:28,886 INFO L134 LiptonReduction]: Checked pairs total: 2520 [2023-08-30 11:30:28,886 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-08-30 11:30:28,899 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 11:30:28,904 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;@4784a296, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 11:30:28,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-08-30 11:30:28,906 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 11:30:28,907 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 11:30:28,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:28,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 11:30:28,908 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:30:28,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:28,912 INFO L85 PathProgramCache]: Analyzing trace with hash 21084, now seen corresponding path program 1 times [2023-08-30 11:30:28,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:28,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945949059] [2023-08-30 11:30:28,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:28,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:29,213 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 11:30:29,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:29,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945949059] [2023-08-30 11:30:29,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945949059] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:30:29,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:30:29,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:30:29,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174341719] [2023-08-30 11:30:29,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:30:29,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:30:29,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:29,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:30:29,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:30:29,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 307 [2023-08-30 11:30:29,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:29,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:29,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 307 [2023-08-30 11:30:29,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:29,447 INFO L130 PetriNetUnfolder]: 383/577 cut-off events. [2023-08-30 11:30:29,447 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 11:30:29,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1186 conditions, 577 events. 383/577 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 2480 event pairs, 178 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 523. Up to 284 conditions per place. [2023-08-30 11:30:29,457 INFO L137 encePairwiseOnDemand]: 300/307 looper letters, 37 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-30 11:30:29,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 41 transitions, 178 flow [2023-08-30 11:30:29,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:30:29,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:30:29,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2023-08-30 11:30:29,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4581976112920738 [2023-08-30 11:30:29,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2023-08-30 11:30:29,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2023-08-30 11:30:29,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:29,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2023-08-30 11:30:29,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:29,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:29,494 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:29,495 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 61 flow. Second operand 3 states and 422 transitions. [2023-08-30 11:30:29,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 41 transitions, 178 flow [2023-08-30 11:30:29,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 41 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 11:30:29,502 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 64 flow [2023-08-30 11:30:29,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2023-08-30 11:30:29,507 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-08-30 11:30:29,507 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 64 flow [2023-08-30 11:30:29,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:29,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:29,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 11:30:29,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 11:30:29,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:30:29,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:29,509 INFO L85 PathProgramCache]: Analyzing trace with hash 655141, now seen corresponding path program 1 times [2023-08-30 11:30:29,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:29,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234667646] [2023-08-30 11:30:29,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:29,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:29,618 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 11:30:29,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:29,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234667646] [2023-08-30 11:30:29,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234667646] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:30:29,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094701672] [2023-08-30 11:30:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:29,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:29,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:30:29,625 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 11:30:29,633 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 11:30:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:29,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:30:29,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:30:29,751 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 11:30:29,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:30:29,764 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 11:30:29,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094701672] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:30:29,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:30:29,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 11:30:29,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723854880] [2023-08-30 11:30:29,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:30:29,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:30:29,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:29,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:30:29,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:30:29,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 307 [2023-08-30 11:30:29,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 64 flow. Second operand has 7 states, 7 states have (on average 126.14285714285714) internal successors, (883), 7 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:29,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:29,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 307 [2023-08-30 11:30:29,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:30,126 INFO L130 PetriNetUnfolder]: 959/1441 cut-off events. [2023-08-30 11:30:30,126 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 11:30:30,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2938 conditions, 1441 events. 959/1441 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 7307 event pairs, 445 based on Foata normal form. 0/605 useless extension candidates. Maximal degree in co-relation 2347. Up to 283 conditions per place. [2023-08-30 11:30:30,133 INFO L137 encePairwiseOnDemand]: 303/307 looper letters, 87 selfloop transitions, 9 changer transitions 0/98 dead transitions. [2023-08-30 11:30:30,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 98 transitions, 432 flow [2023-08-30 11:30:30,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:30:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:30:30,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 974 transitions. [2023-08-30 11:30:30,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532340623545835 [2023-08-30 11:30:30,138 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 974 transitions. [2023-08-30 11:30:30,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 974 transitions. [2023-08-30 11:30:30,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:30,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 974 transitions. [2023-08-30 11:30:30,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 139.14285714285714) internal successors, (974), 7 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:30,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 307.0) internal successors, (2456), 8 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 11:30:30,145 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 307.0) internal successors, (2456), 8 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 11:30:30,146 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 64 flow. Second operand 7 states and 974 transitions. [2023-08-30 11:30:30,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 98 transitions, 432 flow [2023-08-30 11:30:30,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 98 transitions, 430 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:30:30,150 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 121 flow [2023-08-30 11:30:30,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=121, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-30 11:30:30,151 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-08-30 11:30:30,151 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 121 flow [2023-08-30 11:30:30,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 126.14285714285714) internal successors, (883), 7 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:30,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:30,152 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-08-30 11:30:30,164 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 11:30:30,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:30,358 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:30:30,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:30,359 INFO L85 PathProgramCache]: Analyzing trace with hash 20310460, now seen corresponding path program 1 times [2023-08-30 11:30:30,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:30,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786843380] [2023-08-30 11:30:30,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:30,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:30:30,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:30,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786843380] [2023-08-30 11:30:30,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786843380] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:30:30,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:30:30,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:30:30,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442192327] [2023-08-30 11:30:30,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:30:30,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:30:30,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:30,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:30:30,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:30:30,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 307 [2023-08-30 11:30:30,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:30,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:30,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 307 [2023-08-30 11:30:30,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:30,598 INFO L130 PetriNetUnfolder]: 956/1437 cut-off events. [2023-08-30 11:30:30,599 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 11:30:30,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2940 conditions, 1437 events. 956/1437 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 7387 event pairs, 445 based on Foata normal form. 2/604 useless extension candidates. Maximal degree in co-relation 1754. Up to 1402 conditions per place. [2023-08-30 11:30:30,606 INFO L137 encePairwiseOnDemand]: 305/307 looper letters, 23 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-30 11:30:30,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 26 transitions, 142 flow [2023-08-30 11:30:30,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:30:30,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:30:30,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-08-30 11:30:30,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42996742671009774 [2023-08-30 11:30:30,609 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-08-30 11:30:30,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-08-30 11:30:30,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:30,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-08-30 11:30:30,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:30,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:30,613 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:30,613 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 121 flow. Second operand 3 states and 396 transitions. [2023-08-30 11:30:30,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 26 transitions, 142 flow [2023-08-30 11:30:30,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 26 transitions, 134 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 11:30:30,615 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 88 flow [2023-08-30 11:30:30,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2023-08-30 11:30:30,616 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2023-08-30 11:30:30,625 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 88 flow [2023-08-30 11:30:30,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:30,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:30,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 11:30:30,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 11:30:30,627 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:30:30,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:30,627 INFO L85 PathProgramCache]: Analyzing trace with hash 629234067, now seen corresponding path program 1 times [2023-08-30 11:30:30,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:30,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682624534] [2023-08-30 11:30:30,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:30,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:30,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:30,803 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 11:30:30,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:30,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682624534] [2023-08-30 11:30:30,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682624534] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:30:30,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:30:30,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:30:30,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558954104] [2023-08-30 11:30:30,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:30:30,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:30:30,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:30,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:30:30,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 11:30:30,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 307 [2023-08-30 11:30:30,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:30,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:30,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 307 [2023-08-30 11:30:30,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:31,035 INFO L130 PetriNetUnfolder]: 786/1432 cut-off events. [2023-08-30 11:30:31,036 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-30 11:30:31,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2918 conditions, 1432 events. 786/1432 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 8624 event pairs, 225 based on Foata normal form. 0/822 useless extension candidates. Maximal degree in co-relation 2906. Up to 791 conditions per place. [2023-08-30 11:30:31,043 INFO L137 encePairwiseOnDemand]: 300/307 looper letters, 42 selfloop transitions, 4 changer transitions 3/50 dead transitions. [2023-08-30 11:30:31,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 50 transitions, 238 flow [2023-08-30 11:30:31,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:30:31,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:30:31,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 653 transitions. [2023-08-30 11:30:31,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254071661237785 [2023-08-30 11:30:31,046 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 653 transitions. [2023-08-30 11:30:31,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 653 transitions. [2023-08-30 11:30:31,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:31,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 653 transitions. [2023-08-30 11:30:31,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:31,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 307.0) internal successors, (1842), 6 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:31,051 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 307.0) internal successors, (1842), 6 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:31,051 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 88 flow. Second operand 5 states and 653 transitions. [2023-08-30 11:30:31,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 50 transitions, 238 flow [2023-08-30 11:30:31,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 50 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:30:31,055 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 129 flow [2023-08-30 11:30:31,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-08-30 11:30:31,057 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2023-08-30 11:30:31,057 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 129 flow [2023-08-30 11:30:31,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:31,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:31,058 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 11:30:31,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 11:30:31,058 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:30:31,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:31,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1956435670, now seen corresponding path program 2 times [2023-08-30 11:30:31,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:31,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488663117] [2023-08-30 11:30:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:31,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:31,156 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 11:30:31,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:31,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488663117] [2023-08-30 11:30:31,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488663117] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:30:31,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886448750] [2023-08-30 11:30:31,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:30:31,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:31,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:30:31,161 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 11:30:31,174 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 11:30:31,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:30:31,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:30:31,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 11:30:31,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:30:31,246 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 11:30:31,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:30:31,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886448750] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:30:31,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:30:31,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 11:30:31,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772272034] [2023-08-30 11:30:31,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:30:31,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:30:31,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:31,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:30:31,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:30:31,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 307 [2023-08-30 11:30:31,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:31,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:31,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 307 [2023-08-30 11:30:31,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:31,433 INFO L130 PetriNetUnfolder]: 851/1456 cut-off events. [2023-08-30 11:30:31,433 INFO L131 PetriNetUnfolder]: For 633/703 co-relation queries the response was YES. [2023-08-30 11:30:31,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3866 conditions, 1456 events. 851/1456 cut-off events. For 633/703 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 8890 event pairs, 525 based on Foata normal form. 56/972 useless extension candidates. Maximal degree in co-relation 3850. Up to 1436 conditions per place. [2023-08-30 11:30:31,441 INFO L137 encePairwiseOnDemand]: 305/307 looper letters, 24 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-30 11:30:31,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 28 transitions, 169 flow [2023-08-30 11:30:31,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:30:31,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:30:31,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2023-08-30 11:30:31,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43213897937024975 [2023-08-30 11:30:31,444 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2023-08-30 11:30:31,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2023-08-30 11:30:31,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:31,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2023-08-30 11:30:31,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:31,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:31,451 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:31,451 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 129 flow. Second operand 3 states and 398 transitions. [2023-08-30 11:30:31,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 28 transitions, 169 flow [2023-08-30 11:30:31,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 28 transitions, 157 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-30 11:30:31,455 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 109 flow [2023-08-30 11:30:31,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-08-30 11:30:31,457 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-08-30 11:30:31,460 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 109 flow [2023-08-30 11:30:31,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:31,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:31,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:30:31,471 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 11:30:31,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:31,666 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:30:31,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:31,667 INFO L85 PathProgramCache]: Analyzing trace with hash -891104295, now seen corresponding path program 1 times [2023-08-30 11:30:31,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:31,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198520450] [2023-08-30 11:30:31,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:31,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:31,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:31,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:31,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198520450] [2023-08-30 11:30:31,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198520450] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:30:31,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:30:31,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:30:31,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572988631] [2023-08-30 11:30:31,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:30:31,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:30:31,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:31,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:30:31,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 11:30:31,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 307 [2023-08-30 11:30:31,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 109 flow. Second operand has 4 states, 4 states have (on average 123.5) internal successors, (494), 4 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:31,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:31,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 307 [2023-08-30 11:30:31,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:31,947 INFO L130 PetriNetUnfolder]: 690/1195 cut-off events. [2023-08-30 11:30:31,949 INFO L131 PetriNetUnfolder]: For 534/597 co-relation queries the response was YES. [2023-08-30 11:30:31,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3146 conditions, 1195 events. 690/1195 cut-off events. For 534/597 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 7111 event pairs, 429 based on Foata normal form. 59/822 useless extension candidates. Maximal degree in co-relation 3133. Up to 1150 conditions per place. [2023-08-30 11:30:31,954 INFO L137 encePairwiseOnDemand]: 301/307 looper letters, 23 selfloop transitions, 2 changer transitions 9/37 dead transitions. [2023-08-30 11:30:31,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 199 flow [2023-08-30 11:30:31,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:30:31,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:30:31,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 520 transitions. [2023-08-30 11:30:31,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4234527687296417 [2023-08-30 11:30:31,957 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 520 transitions. [2023-08-30 11:30:31,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 520 transitions. [2023-08-30 11:30:31,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:31,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 520 transitions. [2023-08-30 11:30:31,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:31,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:31,961 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:31,961 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 109 flow. Second operand 4 states and 520 transitions. [2023-08-30 11:30:31,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 199 flow [2023-08-30 11:30:31,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 198 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:30:31,964 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 124 flow [2023-08-30 11:30:31,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-08-30 11:30:31,966 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2023-08-30 11:30:31,966 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 124 flow [2023-08-30 11:30:31,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 123.5) internal successors, (494), 4 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:31,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:31,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:30:31,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 11:30:31,967 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:30:31,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:31,968 INFO L85 PathProgramCache]: Analyzing trace with hash 689890302, now seen corresponding path program 1 times [2023-08-30 11:30:31,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:31,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814427041] [2023-08-30 11:30:31,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:31,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:32,049 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 11:30:32,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:32,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814427041] [2023-08-30 11:30:32,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814427041] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:30:32,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401141335] [2023-08-30 11:30:32,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:32,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:32,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:30:32,052 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 11:30:32,055 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 11:30:32,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:32,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:30:32,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:30:32,134 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 11:30:32,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:30:32,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401141335] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:30:32,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:30:32,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-30 11:30:32,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739964557] [2023-08-30 11:30:32,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:30:32,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:30:32,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:32,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:30:32,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 11:30:32,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 307 [2023-08-30 11:30:32,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:32,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:32,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 307 [2023-08-30 11:30:32,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:32,221 INFO L130 PetriNetUnfolder]: 309/554 cut-off events. [2023-08-30 11:30:32,221 INFO L131 PetriNetUnfolder]: For 548/580 co-relation queries the response was YES. [2023-08-30 11:30:32,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1573 conditions, 554 events. 309/554 cut-off events. For 548/580 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 2767 event pairs, 164 based on Foata normal form. 128/606 useless extension candidates. Maximal degree in co-relation 1557. Up to 538 conditions per place. [2023-08-30 11:30:32,223 INFO L137 encePairwiseOnDemand]: 303/307 looper letters, 17 selfloop transitions, 1 changer transitions 5/25 dead transitions. [2023-08-30 11:30:32,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 25 transitions, 154 flow [2023-08-30 11:30:32,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:30:32,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:30:32,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2023-08-30 11:30:32,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43105320304017375 [2023-08-30 11:30:32,226 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2023-08-30 11:30:32,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2023-08-30 11:30:32,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:32,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2023-08-30 11:30:32,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:32,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:32,229 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:32,229 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 124 flow. Second operand 3 states and 397 transitions. [2023-08-30 11:30:32,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 25 transitions, 154 flow [2023-08-30 11:30:32,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 25 transitions, 144 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 11:30:32,230 INFO L231 Difference]: Finished difference. Result has 35 places, 20 transitions, 83 flow [2023-08-30 11:30:32,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=35, PETRI_TRANSITIONS=20} [2023-08-30 11:30:32,231 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-08-30 11:30:32,231 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 20 transitions, 83 flow [2023-08-30 11:30:32,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:32,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:32,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:30:32,244 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 11:30:32,444 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 11:30:32,444 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:30:32,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:32,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1559639799, now seen corresponding path program 1 times [2023-08-30 11:30:32,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:32,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854927505] [2023-08-30 11:30:32,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:32,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:33,180 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 11:30:33,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:33,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854927505] [2023-08-30 11:30:33,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854927505] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:30:33,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368802069] [2023-08-30 11:30:33,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:33,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:33,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:30:33,183 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 11:30:33,209 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 11:30:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:33,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 11:30:33,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:30:33,352 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 11:30:33,400 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 6 treesize of output 5 [2023-08-30 11:30:33,438 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 6 treesize of output 5 [2023-08-30 11:30:33,582 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 11:30:33,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:30:34,422 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:34,423 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 62 treesize of output 50 [2023-08-30 11:30:34,436 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:34,437 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 148 treesize of output 140 [2023-08-30 11:30:34,460 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:34,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 97 [2023-08-30 11:30:34,473 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:34,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2023-08-30 11:30:34,865 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 11:30:34,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368802069] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:30:34,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:30:34,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-08-30 11:30:34,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345271682] [2023-08-30 11:30:34,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:30:34,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 11:30:34,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:34,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 11:30:34,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=354, Unknown=2, NotChecked=0, Total=462 [2023-08-30 11:30:37,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:30:38,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 307 [2023-08-30 11:30:38,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 20 transitions, 83 flow. Second operand has 22 states, 22 states have (on average 75.36363636363636) internal successors, (1658), 22 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:38,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:38,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 307 [2023-08-30 11:30:38,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:42,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:30:42,313 INFO L130 PetriNetUnfolder]: 353/606 cut-off events. [2023-08-30 11:30:42,313 INFO L131 PetriNetUnfolder]: For 191/191 co-relation queries the response was YES. [2023-08-30 11:30:42,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1766 conditions, 606 events. 353/606 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2441 event pairs, 36 based on Foata normal form. 6/528 useless extension candidates. Maximal degree in co-relation 1751. Up to 290 conditions per place. [2023-08-30 11:30:42,317 INFO L137 encePairwiseOnDemand]: 296/307 looper letters, 65 selfloop transitions, 47 changer transitions 2/114 dead transitions. [2023-08-30 11:30:42,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 114 transitions, 648 flow [2023-08-30 11:30:42,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 11:30:42,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 11:30:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1897 transitions. [2023-08-30 11:30:42,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25746471226927253 [2023-08-30 11:30:42,324 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1897 transitions. [2023-08-30 11:30:42,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1897 transitions. [2023-08-30 11:30:42,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:42,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1897 transitions. [2023-08-30 11:30:42,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 79.04166666666667) internal successors, (1897), 24 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:42,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 307.0) internal successors, (7675), 25 states have internal predecessors, (7675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:42,348 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 307.0) internal successors, (7675), 25 states have internal predecessors, (7675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:42,348 INFO L175 Difference]: Start difference. First operand has 35 places, 20 transitions, 83 flow. Second operand 24 states and 1897 transitions. [2023-08-30 11:30:42,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 114 transitions, 648 flow [2023-08-30 11:30:42,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 114 transitions, 601 flow, removed 23 selfloop flow, removed 2 redundant places. [2023-08-30 11:30:42,353 INFO L231 Difference]: Finished difference. Result has 60 places, 66 transitions, 435 flow [2023-08-30 11:30:42,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=435, PETRI_PLACES=60, PETRI_TRANSITIONS=66} [2023-08-30 11:30:42,354 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 30 predicate places. [2023-08-30 11:30:42,355 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 66 transitions, 435 flow [2023-08-30 11:30:42,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 75.36363636363636) internal successors, (1658), 22 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:42,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:42,356 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:30:42,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 11:30:42,561 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 11:30:42,561 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:30:42,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:42,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1936656204, now seen corresponding path program 1 times [2023-08-30 11:30:42,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:42,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644444679] [2023-08-30 11:30:42,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:42,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:42,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:43,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:43,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644444679] [2023-08-30 11:30:43,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644444679] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:30:43,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054623588] [2023-08-30 11:30:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:43,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:43,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:30:43,613 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 11:30:43,616 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 11:30:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:43,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 11:30:43,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:30:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:30:43,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:30:44,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:44,178 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 169 treesize of output 137 [2023-08-30 11:30:44,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:30:44,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054623588] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 11:30:44,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 11:30:44,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 5] total 16 [2023-08-30 11:30:44,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291987885] [2023-08-30 11:30:44,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:30:44,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 11:30:44,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:44,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 11:30:44,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-08-30 11:30:44,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 307 [2023-08-30 11:30:44,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 66 transitions, 435 flow. Second operand has 6 states, 6 states have (on average 110.66666666666667) internal successors, (664), 6 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:44,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:44,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 307 [2023-08-30 11:30:44,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:45,016 INFO L130 PetriNetUnfolder]: 375/648 cut-off events. [2023-08-30 11:30:45,017 INFO L131 PetriNetUnfolder]: For 1548/1548 co-relation queries the response was YES. [2023-08-30 11:30:45,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2503 conditions, 648 events. 375/648 cut-off events. For 1548/1548 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2717 event pairs, 44 based on Foata normal form. 8/648 useless extension candidates. Maximal degree in co-relation 2479. Up to 439 conditions per place. [2023-08-30 11:30:45,021 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 55 selfloop transitions, 29 changer transitions 1/85 dead transitions. [2023-08-30 11:30:45,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 722 flow [2023-08-30 11:30:45,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 11:30:45,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 11:30:45,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 910 transitions. [2023-08-30 11:30:45,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3705211726384365 [2023-08-30 11:30:45,025 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 910 transitions. [2023-08-30 11:30:45,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 910 transitions. [2023-08-30 11:30:45,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:45,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 910 transitions. [2023-08-30 11:30:45,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.75) internal successors, (910), 8 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:45,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 307.0) internal successors, (2763), 9 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:45,032 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 307.0) internal successors, (2763), 9 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:45,032 INFO L175 Difference]: Start difference. First operand has 60 places, 66 transitions, 435 flow. Second operand 8 states and 910 transitions. [2023-08-30 11:30:45,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 722 flow [2023-08-30 11:30:45,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 85 transitions, 662 flow, removed 26 selfloop flow, removed 4 redundant places. [2023-08-30 11:30:45,038 INFO L231 Difference]: Finished difference. Result has 66 places, 74 transitions, 566 flow [2023-08-30 11:30:45,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=566, PETRI_PLACES=66, PETRI_TRANSITIONS=74} [2023-08-30 11:30:45,039 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 36 predicate places. [2023-08-30 11:30:45,039 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 74 transitions, 566 flow [2023-08-30 11:30:45,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 110.66666666666667) internal successors, (664), 6 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:45,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:45,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:30:45,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 11:30:45,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:45,245 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:30:45,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:45,245 INFO L85 PathProgramCache]: Analyzing trace with hash -129723556, now seen corresponding path program 1 times [2023-08-30 11:30:45,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:45,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598784935] [2023-08-30 11:30:45,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:45,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:30:45,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:45,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598784935] [2023-08-30 11:30:45,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598784935] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:30:45,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961174434] [2023-08-30 11:30:45,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:45,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:45,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:30:45,409 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 11:30:45,436 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 11:30:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:45,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 11:30:45,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:30:45,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 110 [2023-08-30 11:30:45,736 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 11:30:45,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:30:45,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 6 [2023-08-30 11:30:45,843 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 11:30:45,969 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 11:30:45,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961174434] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:30:45,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:30:45,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 13 [2023-08-30 11:30:45,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777461822] [2023-08-30 11:30:45,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:30:45,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 11:30:45,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:45,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 11:30:45,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-30 11:30:46,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 307 [2023-08-30 11:30:46,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 74 transitions, 566 flow. Second operand has 15 states, 15 states have (on average 114.2) internal successors, (1713), 15 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:46,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:46,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 307 [2023-08-30 11:30:46,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:46,464 INFO L130 PetriNetUnfolder]: 271/516 cut-off events. [2023-08-30 11:30:46,464 INFO L131 PetriNetUnfolder]: For 3889/3889 co-relation queries the response was YES. [2023-08-30 11:30:46,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2222 conditions, 516 events. 271/516 cut-off events. For 3889/3889 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2296 event pairs, 52 based on Foata normal form. 132/642 useless extension candidates. Maximal degree in co-relation 2195. Up to 285 conditions per place. [2023-08-30 11:30:46,467 INFO L137 encePairwiseOnDemand]: 299/307 looper letters, 39 selfloop transitions, 14 changer transitions 29/85 dead transitions. [2023-08-30 11:30:46,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 85 transitions, 765 flow [2023-08-30 11:30:46,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 11:30:46,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 11:30:46,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1405 transitions. [2023-08-30 11:30:46,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38137893593919653 [2023-08-30 11:30:46,472 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1405 transitions. [2023-08-30 11:30:46,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1405 transitions. [2023-08-30 11:30:46,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:46,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1405 transitions. [2023-08-30 11:30:46,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 117.08333333333333) internal successors, (1405), 12 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 11:30:46,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 307.0) internal successors, (3991), 13 states have internal predecessors, (3991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:46,481 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 307.0) internal successors, (3991), 13 states have internal predecessors, (3991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:46,481 INFO L175 Difference]: Start difference. First operand has 66 places, 74 transitions, 566 flow. Second operand 12 states and 1405 transitions. [2023-08-30 11:30:46,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 85 transitions, 765 flow [2023-08-30 11:30:46,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 85 transitions, 698 flow, removed 24 selfloop flow, removed 5 redundant places. [2023-08-30 11:30:46,489 INFO L231 Difference]: Finished difference. Result has 76 places, 51 transitions, 438 flow [2023-08-30 11:30:46,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=438, PETRI_PLACES=76, PETRI_TRANSITIONS=51} [2023-08-30 11:30:46,490 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 46 predicate places. [2023-08-30 11:30:46,490 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 51 transitions, 438 flow [2023-08-30 11:30:46,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 114.2) internal successors, (1713), 15 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:46,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:46,491 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:30:46,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 11:30:46,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:46,698 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:30:46,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:46,698 INFO L85 PathProgramCache]: Analyzing trace with hash 93379440, now seen corresponding path program 2 times [2023-08-30 11:30:46,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:46,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981171542] [2023-08-30 11:30:46,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:46,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:47,656 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 11:30:47,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:47,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981171542] [2023-08-30 11:30:47,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981171542] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:30:47,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954697109] [2023-08-30 11:30:47,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:30:47,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:47,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:30:47,658 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 11:30:47,660 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 11:30:47,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:30:47,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:30:47,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 11:30:47,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:30:48,110 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 11:30:48,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:30:48,765 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-30 11:30:48,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 231 treesize of output 191 [2023-08-30 11:30:49,951 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 11:30:49,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954697109] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:30:49,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:30:49,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-08-30 11:30:49,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070959034] [2023-08-30 11:30:49,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:30:49,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 11:30:49,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:49,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 11:30:49,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2023-08-30 11:30:51,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 307 [2023-08-30 11:30:51,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 51 transitions, 438 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 11:30:51,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:51,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 307 [2023-08-30 11:30:51,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:53,660 INFO L130 PetriNetUnfolder]: 385/673 cut-off events. [2023-08-30 11:30:53,661 INFO L131 PetriNetUnfolder]: For 4958/4958 co-relation queries the response was YES. [2023-08-30 11:30:53,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3400 conditions, 673 events. 385/673 cut-off events. For 4958/4958 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2934 event pairs, 34 based on Foata normal form. 44/717 useless extension candidates. Maximal degree in co-relation 3369. Up to 291 conditions per place. [2023-08-30 11:30:53,667 INFO L137 encePairwiseOnDemand]: 296/307 looper letters, 75 selfloop transitions, 60 changer transitions 2/137 dead transitions. [2023-08-30 11:30:53,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 137 transitions, 1423 flow [2023-08-30 11:30:53,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 11:30:53,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 11:30:53,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2271 transitions. [2023-08-30 11:30:53,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3216258320351225 [2023-08-30 11:30:53,674 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2271 transitions. [2023-08-30 11:30:53,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2271 transitions. [2023-08-30 11:30:53,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:53,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2271 transitions. [2023-08-30 11:30:53,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 98.73913043478261) internal successors, (2271), 23 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:53,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 307.0) internal successors, (7368), 24 states have internal predecessors, (7368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:53,693 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 307.0) internal successors, (7368), 24 states have internal predecessors, (7368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:53,693 INFO L175 Difference]: Start difference. First operand has 76 places, 51 transitions, 438 flow. Second operand 23 states and 2271 transitions. [2023-08-30 11:30:53,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 137 transitions, 1423 flow [2023-08-30 11:30:53,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 137 transitions, 1261 flow, removed 79 selfloop flow, removed 10 redundant places. [2023-08-30 11:30:53,705 INFO L231 Difference]: Finished difference. Result has 84 places, 94 transitions, 1059 flow [2023-08-30 11:30:53,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1059, PETRI_PLACES=84, PETRI_TRANSITIONS=94} [2023-08-30 11:30:53,706 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 54 predicate places. [2023-08-30 11:30:53,706 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 94 transitions, 1059 flow [2023-08-30 11:30:53,707 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 11:30:53,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:53,708 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:30:53,716 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 11:30:53,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:53,912 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:30:53,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:53,913 INFO L85 PathProgramCache]: Analyzing trace with hash -2085225044, now seen corresponding path program 2 times [2023-08-30 11:30:53,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:53,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091496118] [2023-08-30 11:30:53,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:53,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:55,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:55,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091496118] [2023-08-30 11:30:55,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091496118] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:30:55,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999983250] [2023-08-30 11:30:55,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:30:55,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:55,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:30:55,441 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 11:30:55,463 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 11:30:55,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:30:55,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:30:55,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 11:30:55,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:30:55,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:30:55,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:30:55,867 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:55,868 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 168 treesize of output 136 [2023-08-30 11:30:56,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:30:56,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999983250] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:30:56,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:30:56,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 18 [2023-08-30 11:30:56,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103109460] [2023-08-30 11:30:56,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:30:56,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 11:30:56,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:56,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 11:30:56,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2023-08-30 11:30:57,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 307 [2023-08-30 11:30:57,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 94 transitions, 1059 flow. Second operand has 20 states, 20 states have (on average 97.8) internal successors, (1956), 20 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:57,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:57,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 307 [2023-08-30 11:30:57,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:58,925 INFO L130 PetriNetUnfolder]: 497/875 cut-off events. [2023-08-30 11:30:58,926 INFO L131 PetriNetUnfolder]: For 4252/4252 co-relation queries the response was YES. [2023-08-30 11:30:58,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4605 conditions, 875 events. 497/875 cut-off events. For 4252/4252 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4101 event pairs, 50 based on Foata normal form. 60/935 useless extension candidates. Maximal degree in co-relation 4572. Up to 338 conditions per place. [2023-08-30 11:30:58,931 INFO L137 encePairwiseOnDemand]: 298/307 looper letters, 97 selfloop transitions, 56 changer transitions 8/161 dead transitions. [2023-08-30 11:30:58,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 161 transitions, 1900 flow [2023-08-30 11:30:58,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 11:30:58,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 11:30:58,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2304 transitions. [2023-08-30 11:30:58,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32629939102110184 [2023-08-30 11:30:58,939 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2304 transitions. [2023-08-30 11:30:58,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2304 transitions. [2023-08-30 11:30:58,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:58,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2304 transitions. [2023-08-30 11:30:58,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 100.17391304347827) internal successors, (2304), 23 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:58,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 307.0) internal successors, (7368), 24 states have internal predecessors, (7368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:58,953 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 307.0) internal successors, (7368), 24 states have internal predecessors, (7368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:58,953 INFO L175 Difference]: Start difference. First operand has 84 places, 94 transitions, 1059 flow. Second operand 23 states and 2304 transitions. [2023-08-30 11:30:58,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 161 transitions, 1900 flow [2023-08-30 11:30:58,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 161 transitions, 1576 flow, removed 155 selfloop flow, removed 6 redundant places. [2023-08-30 11:30:58,969 INFO L231 Difference]: Finished difference. Result has 103 places, 105 transitions, 1091 flow [2023-08-30 11:30:58,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1091, PETRI_PLACES=103, PETRI_TRANSITIONS=105} [2023-08-30 11:30:58,970 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2023-08-30 11:30:58,970 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 105 transitions, 1091 flow [2023-08-30 11:30:58,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 97.8) internal successors, (1956), 20 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:58,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:58,972 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:30:58,981 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 11:30:59,176 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,SelfDestructingSolverStorable11 [2023-08-30 11:30:59,176 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:30:59,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:59,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1461832664, now seen corresponding path program 2 times [2023-08-30 11:30:59,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:59,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639213235] [2023-08-30 11:30:59,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:59,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:31:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:00,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:31:00,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639213235] [2023-08-30 11:31:00,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639213235] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:31:00,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290095051] [2023-08-30 11:31:00,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:31:00,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:31:00,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:31:00,925 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 11:31:00,946 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 11:31:01,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:31:01,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:31:01,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 11:31:01,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:31:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:31:01,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:31:02,084 INFO L321 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-08-30 11:31:02,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 243 treesize of output 206 [2023-08-30 11:31:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:31:02,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290095051] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:31:02,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:31:02,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 5] total 24 [2023-08-30 11:31:02,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642255839] [2023-08-30 11:31:02,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:31:02,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 11:31:02,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:31:02,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 11:31:02,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2023-08-30 11:31:04,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 307 [2023-08-30 11:31:04,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 105 transitions, 1091 flow. Second operand has 26 states, 26 states have (on average 100.65384615384616) internal successors, (2617), 26 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:04,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:31:04,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 307 [2023-08-30 11:31:04,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:31:06,248 INFO L130 PetriNetUnfolder]: 749/1271 cut-off events. [2023-08-30 11:31:06,249 INFO L131 PetriNetUnfolder]: For 5752/5752 co-relation queries the response was YES. [2023-08-30 11:31:06,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6011 conditions, 1271 events. 749/1271 cut-off events. For 5752/5752 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6253 event pairs, 24 based on Foata normal form. 28/1299 useless extension candidates. Maximal degree in co-relation 5974. Up to 545 conditions per place. [2023-08-30 11:31:06,258 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 103 selfloop transitions, 107 changer transitions 9/219 dead transitions. [2023-08-30 11:31:06,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 219 transitions, 2236 flow [2023-08-30 11:31:06,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 11:31:06,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 11:31:06,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3400 transitions. [2023-08-30 11:31:06,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3356035929325832 [2023-08-30 11:31:06,264 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3400 transitions. [2023-08-30 11:31:06,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3400 transitions. [2023-08-30 11:31:06,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:31:06,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3400 transitions. [2023-08-30 11:31:06,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 103.03030303030303) internal successors, (3400), 33 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:06,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 307.0) internal successors, (10438), 34 states have internal predecessors, (10438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:06,283 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 307.0) internal successors, (10438), 34 states have internal predecessors, (10438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:06,283 INFO L175 Difference]: Start difference. First operand has 103 places, 105 transitions, 1091 flow. Second operand 33 states and 3400 transitions. [2023-08-30 11:31:06,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 219 transitions, 2236 flow [2023-08-30 11:31:06,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 219 transitions, 2114 flow, removed 22 selfloop flow, removed 14 redundant places. [2023-08-30 11:31:06,301 INFO L231 Difference]: Finished difference. Result has 130 places, 160 transitions, 1889 flow [2023-08-30 11:31:06,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1889, PETRI_PLACES=130, PETRI_TRANSITIONS=160} [2023-08-30 11:31:06,302 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 100 predicate places. [2023-08-30 11:31:06,302 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 160 transitions, 1889 flow [2023-08-30 11:31:06,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 100.65384615384616) internal successors, (2617), 26 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:06,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:31:06,303 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:31:06,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 11:31:06,509 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,SelfDestructingSolverStorable12 [2023-08-30 11:31:06,509 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:31:06,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:31:06,510 INFO L85 PathProgramCache]: Analyzing trace with hash -629147281, now seen corresponding path program 1 times [2023-08-30 11:31:06,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:31:06,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769783430] [2023-08-30 11:31:06,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:31:06,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:31:06,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:31:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:07,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:31:07,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769783430] [2023-08-30 11:31:07,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769783430] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:31:07,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372169199] [2023-08-30 11:31:07,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:31:07,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:31:07,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:31:07,631 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 11:31:07,639 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 11:31:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:31:07,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 11:31:07,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:31:07,781 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 16 treesize of output 12 [2023-08-30 11:31:07,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2023-08-30 11:31:07,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:31:07,931 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 21 [2023-08-30 11:31:08,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:31:08,030 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 21 [2023-08-30 11:31:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:08,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:31:09,588 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:31:09,589 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 155 treesize of output 100 [2023-08-30 11:31:09,649 INFO L321 Elim1Store]: treesize reduction 10, result has 86.3 percent of original size [2023-08-30 11:31:09,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 573 treesize of output 559 [2023-08-30 11:31:09,667 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 11:31:09,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:31:09,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 180 treesize of output 180 [2023-08-30 11:31:09,722 INFO L321 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-08-30 11:31:09,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 153 [2023-08-30 11:31:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:12,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372169199] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:31:12,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:31:12,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-30 11:31:12,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12600927] [2023-08-30 11:31:12,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:31:12,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 11:31:12,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:31:12,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 11:31:12,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=790, Unknown=3, NotChecked=0, Total=992 [2023-08-30 11:31:12,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 307 [2023-08-30 11:31:12,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 160 transitions, 1889 flow. Second operand has 32 states, 32 states have (on average 73.3125) internal successors, (2346), 32 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:12,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:31:12,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 307 [2023-08-30 11:31:12,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:31:18,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:31:20,025 INFO L130 PetriNetUnfolder]: 881/1501 cut-off events. [2023-08-30 11:31:20,025 INFO L131 PetriNetUnfolder]: For 8498/8498 co-relation queries the response was YES. [2023-08-30 11:31:20,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8340 conditions, 1501 events. 881/1501 cut-off events. For 8498/8498 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 7673 event pairs, 100 based on Foata normal form. 40/1541 useless extension candidates. Maximal degree in co-relation 8295. Up to 886 conditions per place. [2023-08-30 11:31:20,039 INFO L137 encePairwiseOnDemand]: 296/307 looper letters, 157 selfloop transitions, 96 changer transitions 5/258 dead transitions. [2023-08-30 11:31:20,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 258 transitions, 3163 flow [2023-08-30 11:31:20,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 11:31:20,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 11:31:20,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2663 transitions. [2023-08-30 11:31:20,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2478362028850628 [2023-08-30 11:31:20,044 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2663 transitions. [2023-08-30 11:31:20,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2663 transitions. [2023-08-30 11:31:20,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:31:20,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2663 transitions. [2023-08-30 11:31:20,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 76.08571428571429) internal successors, (2663), 35 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:20,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 307.0) internal successors, (11052), 36 states have internal predecessors, (11052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:20,060 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 307.0) internal successors, (11052), 36 states have internal predecessors, (11052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:20,061 INFO L175 Difference]: Start difference. First operand has 130 places, 160 transitions, 1889 flow. Second operand 35 states and 2663 transitions. [2023-08-30 11:31:20,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 258 transitions, 3163 flow [2023-08-30 11:31:20,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 258 transitions, 2743 flow, removed 170 selfloop flow, removed 13 redundant places. [2023-08-30 11:31:20,106 INFO L231 Difference]: Finished difference. Result has 166 places, 194 transitions, 2318 flow [2023-08-30 11:31:20,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2318, PETRI_PLACES=166, PETRI_TRANSITIONS=194} [2023-08-30 11:31:20,107 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 136 predicate places. [2023-08-30 11:31:20,107 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 194 transitions, 2318 flow [2023-08-30 11:31:20,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 73.3125) internal successors, (2346), 32 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:20,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:31:20,108 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:31:20,115 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 11:31:20,313 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,SelfDestructingSolverStorable13 [2023-08-30 11:31:20,314 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:31:20,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:31:20,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1461544364, now seen corresponding path program 3 times [2023-08-30 11:31:20,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:31:20,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623379355] [2023-08-30 11:31:20,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:31:20,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:31:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:31:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:22,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:31:22,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623379355] [2023-08-30 11:31:22,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623379355] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:31:22,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123534449] [2023-08-30 11:31:22,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:31:22,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:31:22,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:31:22,460 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 11:31:22,462 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 11:31:22,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 11:31:22,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:31:22,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 11:31:22,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:31:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:31:22,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:31:23,344 INFO L321 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-08-30 11:31:23,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 200 [2023-08-30 11:31:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:31:23,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123534449] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:31:23,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:31:23,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 24 [2023-08-30 11:31:23,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680930223] [2023-08-30 11:31:23,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:31:23,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 11:31:23,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:31:23,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 11:31:23,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2023-08-30 11:31:26,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 307 [2023-08-30 11:31:26,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 194 transitions, 2318 flow. Second operand has 26 states, 26 states have (on average 94.57692307692308) internal successors, (2459), 26 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:26,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:31:26,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 307 [2023-08-30 11:31:26,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:31:28,254 INFO L130 PetriNetUnfolder]: 1133/1905 cut-off events. [2023-08-30 11:31:28,254 INFO L131 PetriNetUnfolder]: For 14481/14481 co-relation queries the response was YES. [2023-08-30 11:31:28,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10556 conditions, 1905 events. 1133/1905 cut-off events. For 14481/14481 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 10151 event pairs, 26 based on Foata normal form. 56/1961 useless extension candidates. Maximal degree in co-relation 10497. Up to 695 conditions per place. [2023-08-30 11:31:28,269 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 168 selfloop transitions, 131 changer transitions 7/306 dead transitions. [2023-08-30 11:31:28,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 306 transitions, 3881 flow [2023-08-30 11:31:28,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 11:31:28,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 11:31:28,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2726 transitions. [2023-08-30 11:31:28,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31712424383434157 [2023-08-30 11:31:28,274 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2726 transitions. [2023-08-30 11:31:28,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2726 transitions. [2023-08-30 11:31:28,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:31:28,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2726 transitions. [2023-08-30 11:31:28,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 97.35714285714286) internal successors, (2726), 28 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:28,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 307.0) internal successors, (8903), 29 states have internal predecessors, (8903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:28,286 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 307.0) internal successors, (8903), 29 states have internal predecessors, (8903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:28,286 INFO L175 Difference]: Start difference. First operand has 166 places, 194 transitions, 2318 flow. Second operand 28 states and 2726 transitions. [2023-08-30 11:31:28,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 306 transitions, 3881 flow [2023-08-30 11:31:28,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 306 transitions, 3658 flow, removed 82 selfloop flow, removed 16 redundant places. [2023-08-30 11:31:28,349 INFO L231 Difference]: Finished difference. Result has 181 places, 231 transitions, 2923 flow [2023-08-30 11:31:28,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2923, PETRI_PLACES=181, PETRI_TRANSITIONS=231} [2023-08-30 11:31:28,350 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2023-08-30 11:31:28,350 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 231 transitions, 2923 flow [2023-08-30 11:31:28,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 94.57692307692308) internal successors, (2459), 26 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:28,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:31:28,351 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:31:28,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-30 11:31:28,556 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,SelfDestructingSolverStorable14 [2023-08-30 11:31:28,557 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:31:28,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:31:28,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1927834054, now seen corresponding path program 2 times [2023-08-30 11:31:28,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:31:28,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543389116] [2023-08-30 11:31:28,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:31:28,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:31:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:31:29,464 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 11:31:29,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:31:29,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543389116] [2023-08-30 11:31:29,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543389116] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:31:29,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031651654] [2023-08-30 11:31:29,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:31:29,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:31:29,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:31:29,469 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 11:31:29,471 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 11:31:29,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:31:29,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:31:29,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 11:31:29,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:31:30,055 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 11:31:30,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:31:31,070 INFO L321 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-08-30 11:31:31,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 278 treesize of output 239 [2023-08-30 11:31:32,178 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 11:31:32,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031651654] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:31:32,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:31:32,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 32 [2023-08-30 11:31:32,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927822068] [2023-08-30 11:31:32,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:31:32,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 11:31:32,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:31:32,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 11:31:32,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 11:31:34,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 307 [2023-08-30 11:31:34,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 231 transitions, 2923 flow. Second operand has 34 states, 34 states have (on average 99.41176470588235) internal successors, (3380), 34 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:34,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:31:34,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 307 [2023-08-30 11:31:34,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:31:36,978 INFO L130 PetriNetUnfolder]: 1601/2681 cut-off events. [2023-08-30 11:31:36,978 INFO L131 PetriNetUnfolder]: For 26550/26550 co-relation queries the response was YES. [2023-08-30 11:31:36,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16590 conditions, 2681 events. 1601/2681 cut-off events. For 26550/26550 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 15250 event pairs, 138 based on Foata normal form. 58/2739 useless extension candidates. Maximal degree in co-relation 16527. Up to 1401 conditions per place. [2023-08-30 11:31:37,001 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 203 selfloop transitions, 195 changer transitions 4/402 dead transitions. [2023-08-30 11:31:37,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 402 transitions, 5636 flow [2023-08-30 11:31:37,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 11:31:37,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 11:31:37,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3494 transitions. [2023-08-30 11:31:37,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33473845564284344 [2023-08-30 11:31:37,007 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3494 transitions. [2023-08-30 11:31:37,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3494 transitions. [2023-08-30 11:31:37,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:31:37,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3494 transitions. [2023-08-30 11:31:37,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 102.76470588235294) internal successors, (3494), 34 states have internal predecessors, (3494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:37,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 307.0) internal successors, (10745), 35 states have internal predecessors, (10745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:37,020 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 307.0) internal successors, (10745), 35 states have internal predecessors, (10745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:37,020 INFO L175 Difference]: Start difference. First operand has 181 places, 231 transitions, 2923 flow. Second operand 34 states and 3494 transitions. [2023-08-30 11:31:37,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 402 transitions, 5636 flow [2023-08-30 11:31:37,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 402 transitions, 5411 flow, removed 51 selfloop flow, removed 18 redundant places. [2023-08-30 11:31:37,120 INFO L231 Difference]: Finished difference. Result has 212 places, 342 transitions, 5208 flow [2023-08-30 11:31:37,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=2688, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=5208, PETRI_PLACES=212, PETRI_TRANSITIONS=342} [2023-08-30 11:31:37,121 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 182 predicate places. [2023-08-30 11:31:37,121 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 342 transitions, 5208 flow [2023-08-30 11:31:37,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 99.41176470588235) internal successors, (3380), 34 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:37,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:31:37,122 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:31:37,128 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 11:31:37,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 11:31:37,328 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:31:37,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:31:37,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1936771354, now seen corresponding path program 3 times [2023-08-30 11:31:37,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:31:37,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535773957] [2023-08-30 11:31:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:31:37,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:31:37,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:31:38,726 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 11:31:38,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:31:38,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535773957] [2023-08-30 11:31:38,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535773957] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:31:38,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210698730] [2023-08-30 11:31:38,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:31:38,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:31:38,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:31:38,729 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 11:31:38,737 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 11:31:38,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 11:31:38,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:31:38,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 11:31:38,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:31:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:31:39,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:31:39,387 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-08-30 11:31:39,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 225 treesize of output 188 [2023-08-30 11:31:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:31:39,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210698730] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:31:39,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:31:39,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 21 [2023-08-30 11:31:39,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538819499] [2023-08-30 11:31:39,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:31:39,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 11:31:39,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:31:39,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 11:31:39,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2023-08-30 11:31:41,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 307 [2023-08-30 11:31:41,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 342 transitions, 5208 flow. Second operand has 23 states, 23 states have (on average 100.91304347826087) internal successors, (2321), 23 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:41,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:31:41,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 307 [2023-08-30 11:31:41,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:31:45,055 INFO L130 PetriNetUnfolder]: 2059/3455 cut-off events. [2023-08-30 11:31:45,056 INFO L131 PetriNetUnfolder]: For 46775/46775 co-relation queries the response was YES. [2023-08-30 11:31:45,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24371 conditions, 3455 events. 2059/3455 cut-off events. For 46775/46775 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 20182 event pairs, 108 based on Foata normal form. 124/3579 useless extension candidates. Maximal degree in co-relation 24295. Up to 1129 conditions per place. [2023-08-30 11:31:45,086 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 248 selfloop transitions, 294 changer transitions 6/548 dead transitions. [2023-08-30 11:31:45,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 548 transitions, 9632 flow [2023-08-30 11:31:45,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 11:31:45,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 11:31:45,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3851 transitions. [2023-08-30 11:31:45,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3390263227396778 [2023-08-30 11:31:45,092 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3851 transitions. [2023-08-30 11:31:45,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3851 transitions. [2023-08-30 11:31:45,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:31:45,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3851 transitions. [2023-08-30 11:31:45,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 104.08108108108108) internal successors, (3851), 37 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:45,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 307.0) internal successors, (11666), 38 states have internal predecessors, (11666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:45,106 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 307.0) internal successors, (11666), 38 states have internal predecessors, (11666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:45,106 INFO L175 Difference]: Start difference. First operand has 212 places, 342 transitions, 5208 flow. Second operand 37 states and 3851 transitions. [2023-08-30 11:31:45,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 548 transitions, 9632 flow [2023-08-30 11:31:45,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 548 transitions, 8110 flow, removed 742 selfloop flow, removed 12 redundant places. [2023-08-30 11:31:45,498 INFO L231 Difference]: Finished difference. Result has 247 places, 445 transitions, 7276 flow [2023-08-30 11:31:45,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=4357, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=7276, PETRI_PLACES=247, PETRI_TRANSITIONS=445} [2023-08-30 11:31:45,499 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 217 predicate places. [2023-08-30 11:31:45,499 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 445 transitions, 7276 flow [2023-08-30 11:31:45,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 100.91304347826087) internal successors, (2321), 23 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:45,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:31:45,500 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:31:45,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 11:31:45,706 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,SelfDestructingSolverStorable16 [2023-08-30 11:31:45,706 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:31:45,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:31:45,707 INFO L85 PathProgramCache]: Analyzing trace with hash 2020965747, now seen corresponding path program 4 times [2023-08-30 11:31:45,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:31:45,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339706320] [2023-08-30 11:31:45,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:31:45,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:31:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:31:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:47,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:31:47,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339706320] [2023-08-30 11:31:47,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339706320] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:31:47,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286367770] [2023-08-30 11:31:47,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:31:47,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:31:47,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:31:47,649 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 11:31:47,649 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 11:31:47,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:31:47,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:31:47,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 11:31:47,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:31:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:31:48,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:31:48,592 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 11:31:48,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 247 treesize of output 218 [2023-08-30 11:31:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:31:49,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286367770] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:31:49,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:31:49,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 27 [2023-08-30 11:31:49,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492457200] [2023-08-30 11:31:49,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:31:49,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 11:31:49,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:31:49,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 11:31:49,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2023-08-30 11:31:51,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 307 [2023-08-30 11:31:51,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 445 transitions, 7276 flow. Second operand has 29 states, 29 states have (on average 99.55172413793103) internal successors, (2887), 29 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:51,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:31:51,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 307 [2023-08-30 11:31:51,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:31:54,299 INFO L130 PetriNetUnfolder]: 2497/4201 cut-off events. [2023-08-30 11:31:54,299 INFO L131 PetriNetUnfolder]: For 55706/55706 co-relation queries the response was YES. [2023-08-30 11:31:54,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29193 conditions, 4201 events. 2497/4201 cut-off events. For 55706/55706 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 26040 event pairs, 182 based on Foata normal form. 32/4233 useless extension candidates. Maximal degree in co-relation 29105. Up to 1691 conditions per place. [2023-08-30 11:31:54,337 INFO L137 encePairwiseOnDemand]: 298/307 looper letters, 374 selfloop transitions, 272 changer transitions 7/653 dead transitions. [2023-08-30 11:31:54,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 653 transitions, 10824 flow [2023-08-30 11:31:54,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-30 11:31:54,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-30 11:31:54,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 5011 transitions. [2023-08-30 11:31:54,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33311174632719537 [2023-08-30 11:31:54,344 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 5011 transitions. [2023-08-30 11:31:54,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 5011 transitions. [2023-08-30 11:31:54,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:31:54,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 5011 transitions. [2023-08-30 11:31:54,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 102.26530612244898) internal successors, (5011), 49 states have internal predecessors, (5011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:54,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 307.0) internal successors, (15350), 50 states have internal predecessors, (15350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:54,363 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 307.0) internal successors, (15350), 50 states have internal predecessors, (15350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:54,363 INFO L175 Difference]: Start difference. First operand has 247 places, 445 transitions, 7276 flow. Second operand 49 states and 5011 transitions. [2023-08-30 11:31:54,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 653 transitions, 10824 flow [2023-08-30 11:31:54,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 653 transitions, 9459 flow, removed 641 selfloop flow, removed 16 redundant places. [2023-08-30 11:31:54,691 INFO L231 Difference]: Finished difference. Result has 290 places, 519 transitions, 8123 flow [2023-08-30 11:31:54,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=6152, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=8123, PETRI_PLACES=290, PETRI_TRANSITIONS=519} [2023-08-30 11:31:54,692 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 260 predicate places. [2023-08-30 11:31:54,692 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 519 transitions, 8123 flow [2023-08-30 11:31:54,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 99.55172413793103) internal successors, (2887), 29 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:54,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:31:54,693 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:31:54,700 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 11:31:54,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:31:54,901 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:31:54,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:31:54,901 INFO L85 PathProgramCache]: Analyzing trace with hash 310829972, now seen corresponding path program 5 times [2023-08-30 11:31:54,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:31:54,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426397836] [2023-08-30 11:31:54,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:31:54,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:31:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:31:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:31:55,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:31:55,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426397836] [2023-08-30 11:31:55,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426397836] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:31:55,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498801886] [2023-08-30 11:31:55,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:31:55,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:31:55,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:31:55,063 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 11:31:55,065 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 11:31:55,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:31:55,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:31:55,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 11:31:55,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:31:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:31:55,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:31:56,134 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-08-30 11:31:56,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 245 treesize of output 179 [2023-08-30 11:31:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:31:56,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498801886] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:31:56,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:31:56,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 11:31:56,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275671949] [2023-08-30 11:31:56,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:31:56,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 11:31:56,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:31:56,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 11:31:56,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-30 11:31:56,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 307 [2023-08-30 11:31:56,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 519 transitions, 8123 flow. Second operand has 18 states, 18 states have (on average 112.88888888888889) internal successors, (2032), 18 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:56,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:31:56,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 307 [2023-08-30 11:31:56,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:31:57,293 INFO L130 PetriNetUnfolder]: 2189/3723 cut-off events. [2023-08-30 11:31:57,293 INFO L131 PetriNetUnfolder]: For 50016/50040 co-relation queries the response was YES. [2023-08-30 11:31:57,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25663 conditions, 3723 events. 2189/3723 cut-off events. For 50016/50040 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 22797 event pairs, 1132 based on Foata normal form. 24/3719 useless extension candidates. Maximal degree in co-relation 25572. Up to 3514 conditions per place. [2023-08-30 11:31:57,332 INFO L137 encePairwiseOnDemand]: 303/307 looper letters, 456 selfloop transitions, 9 changer transitions 2/479 dead transitions. [2023-08-30 11:31:57,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 479 transitions, 8333 flow [2023-08-30 11:31:57,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 11:31:57,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 11:31:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 924 transitions. [2023-08-30 11:31:57,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3762214983713355 [2023-08-30 11:31:57,334 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 924 transitions. [2023-08-30 11:31:57,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 924 transitions. [2023-08-30 11:31:57,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:31:57,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 924 transitions. [2023-08-30 11:31:57,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 115.5) internal successors, (924), 8 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:57,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 307.0) internal successors, (2763), 9 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:57,338 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 307.0) internal successors, (2763), 9 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:57,338 INFO L175 Difference]: Start difference. First operand has 290 places, 519 transitions, 8123 flow. Second operand 8 states and 924 transitions. [2023-08-30 11:31:57,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 479 transitions, 8333 flow [2023-08-30 11:31:57,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 479 transitions, 7825 flow, removed 176 selfloop flow, removed 29 redundant places. [2023-08-30 11:31:57,591 INFO L231 Difference]: Finished difference. Result has 260 places, 466 transitions, 6798 flow [2023-08-30 11:31:57,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=6780, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6798, PETRI_PLACES=260, PETRI_TRANSITIONS=466} [2023-08-30 11:31:57,592 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 230 predicate places. [2023-08-30 11:31:57,592 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 466 transitions, 6798 flow [2023-08-30 11:31:57,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 112.88888888888889) internal successors, (2032), 18 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:57,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:31:57,593 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:31:57,600 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 11:31:57,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:31:57,801 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:31:57,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:31:57,801 INFO L85 PathProgramCache]: Analyzing trace with hash 979867604, now seen corresponding path program 6 times [2023-08-30 11:31:57,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:31:57,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125496067] [2023-08-30 11:31:57,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:31:57,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:31:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:31:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:31:58,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:31:58,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125496067] [2023-08-30 11:31:58,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125496067] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:31:58,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061376060] [2023-08-30 11:31:58,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:31:58,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:31:58,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:31:58,017 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 11:31:58,020 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 11:31:58,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 11:31:58,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:31:58,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 11:31:58,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:31:58,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 110 [2023-08-30 11:31:58,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:58,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:31:58,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 6 [2023-08-30 11:31:58,576 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 11:31:58,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:58,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061376060] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:31:58,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:31:58,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-08-30 11:31:58,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918029125] [2023-08-30 11:31:58,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:31:58,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 11:31:58,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:31:58,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 11:31:58,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2023-08-30 11:31:58,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 307 [2023-08-30 11:31:58,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 466 transitions, 6798 flow. Second operand has 22 states, 22 states have (on average 110.13636363636364) internal successors, (2423), 22 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:58,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:31:58,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 307 [2023-08-30 11:31:58,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:31:59,967 INFO L130 PetriNetUnfolder]: 2439/4151 cut-off events. [2023-08-30 11:31:59,968 INFO L131 PetriNetUnfolder]: For 54666/54666 co-relation queries the response was YES. [2023-08-30 11:31:59,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27244 conditions, 4151 events. 2439/4151 cut-off events. For 54666/54666 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 25573 event pairs, 398 based on Foata normal form. 128/4275 useless extension candidates. Maximal degree in co-relation 27158. Up to 3021 conditions per place. [2023-08-30 11:32:00,005 INFO L137 encePairwiseOnDemand]: 298/307 looper letters, 376 selfloop transitions, 98 changer transitions 59/533 dead transitions. [2023-08-30 11:32:00,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 533 transitions, 8570 flow [2023-08-30 11:32:00,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 11:32:00,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 11:32:00,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2255 transitions. [2023-08-30 11:32:00,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36726384364820847 [2023-08-30 11:32:00,009 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2255 transitions. [2023-08-30 11:32:00,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2255 transitions. [2023-08-30 11:32:00,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:00,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2255 transitions. [2023-08-30 11:32:00,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 112.75) internal successors, (2255), 20 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:00,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 307.0) internal successors, (6447), 21 states have internal predecessors, (6447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:00,017 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 307.0) internal successors, (6447), 21 states have internal predecessors, (6447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:00,017 INFO L175 Difference]: Start difference. First operand has 260 places, 466 transitions, 6798 flow. Second operand 20 states and 2255 transitions. [2023-08-30 11:32:00,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 533 transitions, 8570 flow [2023-08-30 11:32:00,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 533 transitions, 8499 flow, removed 28 selfloop flow, removed 7 redundant places. [2023-08-30 11:32:00,295 INFO L231 Difference]: Finished difference. Result has 278 places, 459 transitions, 7106 flow [2023-08-30 11:32:00,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=6721, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7106, PETRI_PLACES=278, PETRI_TRANSITIONS=459} [2023-08-30 11:32:00,295 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 248 predicate places. [2023-08-30 11:32:00,295 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 459 transitions, 7106 flow [2023-08-30 11:32:00,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 110.13636363636364) internal successors, (2423), 22 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:00,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:00,296 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:32:00,308 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 11:32:00,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:00,501 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:32:00,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:00,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1511061001, now seen corresponding path program 4 times [2023-08-30 11:32:00,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:00,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632953176] [2023-08-30 11:32:00,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:00,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:02,460 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:02,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:02,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632953176] [2023-08-30 11:32:02,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632953176] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:02,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33960687] [2023-08-30 11:32:02,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:32:02,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:02,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:02,466 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 11:32:02,468 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 11:32:02,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:32:02,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:32:02,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 11:32:02,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:03,269 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:03,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:32:04,317 INFO L321 Elim1Store]: treesize reduction 44, result has 57.3 percent of original size [2023-08-30 11:32:04,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 278 treesize of output 244 [2023-08-30 11:32:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:05,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33960687] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:32:05,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:32:05,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-08-30 11:32:05,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722900444] [2023-08-30 11:32:05,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:32:05,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 11:32:05,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:05,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 11:32:05,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1559, Unknown=0, NotChecked=0, Total=1892 [2023-08-30 11:32:08,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 307 [2023-08-30 11:32:08,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 459 transitions, 7106 flow. Second operand has 44 states, 44 states have (on average 93.22727272727273) internal successors, (4102), 44 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 11:32:08,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:08,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 307 [2023-08-30 11:32:08,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:17,989 INFO L130 PetriNetUnfolder]: 3955/6586 cut-off events. [2023-08-30 11:32:17,989 INFO L131 PetriNetUnfolder]: For 139294/139294 co-relation queries the response was YES. [2023-08-30 11:32:18,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51340 conditions, 6586 events. 3955/6586 cut-off events. For 139294/139294 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 41459 event pairs, 288 based on Foata normal form. 180/6758 useless extension candidates. Maximal degree in co-relation 51248. Up to 2659 conditions per place. [2023-08-30 11:32:18,054 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 489 selfloop transitions, 552 changer transitions 11/1052 dead transitions. [2023-08-30 11:32:18,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1052 transitions, 19451 flow [2023-08-30 11:32:18,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-08-30 11:32:18,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2023-08-30 11:32:18,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 7844 transitions. [2023-08-30 11:32:18,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31543813085615474 [2023-08-30 11:32:18,064 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 7844 transitions. [2023-08-30 11:32:18,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 7844 transitions. [2023-08-30 11:32:18,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:18,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 7844 transitions. [2023-08-30 11:32:18,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 96.8395061728395) internal successors, (7844), 81 states have internal predecessors, (7844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:18,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 307.0) internal successors, (25174), 82 states have internal predecessors, (25174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:18,097 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 307.0) internal successors, (25174), 82 states have internal predecessors, (25174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:18,097 INFO L175 Difference]: Start difference. First operand has 278 places, 459 transitions, 7106 flow. Second operand 81 states and 7844 transitions. [2023-08-30 11:32:18,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1052 transitions, 19451 flow [2023-08-30 11:32:18,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 1052 transitions, 18431 flow, removed 472 selfloop flow, removed 17 redundant places. [2023-08-30 11:32:18,629 INFO L231 Difference]: Finished difference. Result has 331 places, 863 transitions, 17282 flow [2023-08-30 11:32:18,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=6848, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=17282, PETRI_PLACES=331, PETRI_TRANSITIONS=863} [2023-08-30 11:32:18,630 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 301 predicate places. [2023-08-30 11:32:18,630 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 863 transitions, 17282 flow [2023-08-30 11:32:18,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 93.22727272727273) internal successors, (4102), 44 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 11:32:18,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:18,631 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:32:18,636 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 11:32:18,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:18,833 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:32:18,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:18,834 INFO L85 PathProgramCache]: Analyzing trace with hash -2133719910, now seen corresponding path program 7 times [2023-08-30 11:32:18,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:18,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990501354] [2023-08-30 11:32:18,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:18,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:20,861 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:20,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:20,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990501354] [2023-08-30 11:32:20,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990501354] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:20,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885733125] [2023-08-30 11:32:20,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:32:20,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:20,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:20,863 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 11:32:20,865 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 11:32:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:20,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 11:32:20,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:32:21,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:32:22,364 INFO L321 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2023-08-30 11:32:22,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 259 treesize of output 214 [2023-08-30 11:32:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:32:22,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885733125] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:32:22,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:32:22,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 34 [2023-08-30 11:32:22,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380622492] [2023-08-30 11:32:22,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:32:22,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 11:32:22,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:22,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 11:32:22,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2023-08-30 11:32:25,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 307 [2023-08-30 11:32:25,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 863 transitions, 17282 flow. Second operand has 36 states, 36 states have (on average 99.47222222222223) internal successors, (3581), 36 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:25,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:25,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 307 [2023-08-30 11:32:25,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:29,307 INFO L130 PetriNetUnfolder]: 4007/6718 cut-off events. [2023-08-30 11:32:29,307 INFO L131 PetriNetUnfolder]: For 124776/124776 co-relation queries the response was YES. [2023-08-30 11:32:29,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53640 conditions, 6718 events. 4007/6718 cut-off events. For 124776/124776 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 42956 event pairs, 446 based on Foata normal form. 108/6826 useless extension candidates. Maximal degree in co-relation 53543. Up to 3417 conditions per place. [2023-08-30 11:32:29,373 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 652 selfloop transitions, 274 changer transitions 11/937 dead transitions. [2023-08-30 11:32:29,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 937 transitions, 20109 flow [2023-08-30 11:32:29,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 11:32:29,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 11:32:29,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2963 transitions. [2023-08-30 11:32:29,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33280916544984834 [2023-08-30 11:32:29,378 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2963 transitions. [2023-08-30 11:32:29,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2963 transitions. [2023-08-30 11:32:29,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:29,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2963 transitions. [2023-08-30 11:32:29,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 102.17241379310344) internal successors, (2963), 29 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:29,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 307.0) internal successors, (9210), 30 states have internal predecessors, (9210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:29,388 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 307.0) internal successors, (9210), 30 states have internal predecessors, (9210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:29,388 INFO L175 Difference]: Start difference. First operand has 331 places, 863 transitions, 17282 flow. Second operand 29 states and 2963 transitions. [2023-08-30 11:32:29,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 937 transitions, 20109 flow [2023-08-30 11:32:30,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 937 transitions, 15060 flow, removed 2493 selfloop flow, removed 14 redundant places. [2023-08-30 11:32:30,610 INFO L231 Difference]: Finished difference. Result has 350 places, 858 transitions, 13308 flow [2023-08-30 11:32:30,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=12148, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=13308, PETRI_PLACES=350, PETRI_TRANSITIONS=858} [2023-08-30 11:32:30,611 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 320 predicate places. [2023-08-30 11:32:30,611 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 858 transitions, 13308 flow [2023-08-30 11:32:30,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 99.47222222222223) internal successors, (3581), 36 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:30,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:30,612 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:32:30,617 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 11:32:30,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:30,812 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:32:30,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:30,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1516416119, now seen corresponding path program 5 times [2023-08-30 11:32:30,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:30,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015539913] [2023-08-30 11:32:30,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:30,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:30,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:32,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:32,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:32,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015539913] [2023-08-30 11:32:32,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015539913] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:32,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795553896] [2023-08-30 11:32:32,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:32:32,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:32,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:32,325 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 11:32:32,327 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 11:32:32,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 11:32:32,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:32:32,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 11:32:32,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:33,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:32:34,498 INFO L321 Elim1Store]: treesize reduction 60, result has 50.4 percent of original size [2023-08-30 11:32:34,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 276 treesize of output 246 [2023-08-30 11:32:37,023 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:37,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795553896] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:32:37,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:32:37,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 41 [2023-08-30 11:32:37,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025563545] [2023-08-30 11:32:37,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:32:37,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-30 11:32:37,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:37,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-30 11:32:37,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1527, Unknown=0, NotChecked=0, Total=1806 [2023-08-30 11:32:41,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 307 [2023-08-30 11:32:41,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 858 transitions, 13308 flow. Second operand has 43 states, 43 states have (on average 98.25581395348837) internal successors, (4225), 43 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:41,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:41,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 307 [2023-08-30 11:32:41,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:33:06,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:33:09,060 INFO L130 PetriNetUnfolder]: 5959/9906 cut-off events. [2023-08-30 11:33:09,060 INFO L131 PetriNetUnfolder]: For 125861/125861 co-relation queries the response was YES. [2023-08-30 11:33:09,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66208 conditions, 9906 events. 5959/9906 cut-off events. For 125861/125861 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 66470 event pairs, 852 based on Foata normal form. 140/9994 useless extension candidates. Maximal degree in co-relation 66108. Up to 4797 conditions per place. [2023-08-30 11:33:09,156 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 945 selfloop transitions, 615 changer transitions 12/1572 dead transitions. [2023-08-30 11:33:09,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 1572 transitions, 25240 flow [2023-08-30 11:33:09,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-08-30 11:33:09,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2023-08-30 11:33:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 9720 transitions. [2023-08-30 11:33:09,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3298045602605863 [2023-08-30 11:33:09,166 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 9720 transitions. [2023-08-30 11:33:09,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 9720 transitions. [2023-08-30 11:33:09,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:33:09,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 9720 transitions. [2023-08-30 11:33:09,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 101.25) internal successors, (9720), 96 states have internal predecessors, (9720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:09,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 307.0) internal successors, (29779), 97 states have internal predecessors, (29779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:09,204 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 307.0) internal successors, (29779), 97 states have internal predecessors, (29779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:09,205 INFO L175 Difference]: Start difference. First operand has 350 places, 858 transitions, 13308 flow. Second operand 96 states and 9720 transitions. [2023-08-30 11:33:09,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 1572 transitions, 25240 flow [2023-08-30 11:33:10,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 1572 transitions, 24770 flow, removed 151 selfloop flow, removed 20 redundant places. [2023-08-30 11:33:10,175 INFO L231 Difference]: Finished difference. Result has 450 places, 1209 transitions, 21034 flow [2023-08-30 11:33:10,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=12997, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=21034, PETRI_PLACES=450, PETRI_TRANSITIONS=1209} [2023-08-30 11:33:10,176 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 420 predicate places. [2023-08-30 11:33:10,176 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 1209 transitions, 21034 flow [2023-08-30 11:33:10,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 98.25581395348837) internal successors, (4225), 43 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:10,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:33:10,177 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:33:10,184 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 11:33:10,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:33:10,378 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:33:10,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:33:10,378 INFO L85 PathProgramCache]: Analyzing trace with hash 355266967, now seen corresponding path program 8 times [2023-08-30 11:33:10,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:33:10,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764616358] [2023-08-30 11:33:10,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:33:10,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:33:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:33:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:33:12,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:33:12,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764616358] [2023-08-30 11:33:12,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764616358] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:33:12,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759868105] [2023-08-30 11:33:12,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:33:12,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:33:12,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:33:12,182 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 11:33:12,185 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 11:33:12,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:33:12,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:33:12,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-30 11:33:12,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:33:12,436 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 11:33:12,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:33:12,506 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 11:33:12,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:33:12,560 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 11:33:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:33:13,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:33:14,308 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:33:14,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 104 [2023-08-30 11:33:14,402 INFO L321 Elim1Store]: treesize reduction 10, result has 90.3 percent of original size [2023-08-30 11:33:14,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 317 treesize of output 358 [2023-08-30 11:33:14,460 INFO L321 Elim1Store]: treesize reduction 10, result has 82.5 percent of original size [2023-08-30 11:33:14,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 261 treesize of output 241 [2023-08-30 11:33:14,519 INFO L321 Elim1Store]: treesize reduction 10, result has 82.5 percent of original size [2023-08-30 11:33:14,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 164 treesize of output 177 [2023-08-30 11:33:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:33:23,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759868105] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:33:23,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:33:23,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2023-08-30 11:33:23,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911427958] [2023-08-30 11:33:23,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:33:23,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-30 11:33:23,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:33:23,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-30 11:33:23,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1472, Unknown=2, NotChecked=0, Total=1722 [2023-08-30 11:33:25,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 307 [2023-08-30 11:33:25,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 1209 transitions, 21034 flow. Second operand has 42 states, 42 states have (on average 73.28571428571429) internal successors, (3078), 42 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:25,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:33:25,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 307 [2023-08-30 11:33:25,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:33:49,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:33:55,079 INFO L130 PetriNetUnfolder]: 8213/13560 cut-off events. [2023-08-30 11:33:55,079 INFO L131 PetriNetUnfolder]: For 300178/300178 co-relation queries the response was YES. [2023-08-30 11:33:55,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104303 conditions, 13560 events. 8213/13560 cut-off events. For 300178/300178 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 94086 event pairs, 818 based on Foata normal form. 308/13812 useless extension candidates. Maximal degree in co-relation 104180. Up to 6760 conditions per place. [2023-08-30 11:33:55,226 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 1076 selfloop transitions, 968 changer transitions 8/2052 dead transitions. [2023-08-30 11:33:55,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 2052 transitions, 37951 flow [2023-08-30 11:33:55,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2023-08-30 11:33:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2023-08-30 11:33:55,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 8500 transitions. [2023-08-30 11:33:55,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2494351028552983 [2023-08-30 11:33:55,236 INFO L72 ComplementDD]: Start complementDD. Operand 111 states and 8500 transitions. [2023-08-30 11:33:55,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 8500 transitions. [2023-08-30 11:33:55,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:33:55,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 111 states and 8500 transitions. [2023-08-30 11:33:55,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 112 states, 111 states have (on average 76.57657657657657) internal successors, (8500), 111 states have internal predecessors, (8500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:55,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 112 states, 112 states have (on average 307.0) internal successors, (34384), 112 states have internal predecessors, (34384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:55,282 INFO L81 ComplementDD]: Finished complementDD. Result has 112 states, 112 states have (on average 307.0) internal successors, (34384), 112 states have internal predecessors, (34384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:55,282 INFO L175 Difference]: Start difference. First operand has 450 places, 1209 transitions, 21034 flow. Second operand 111 states and 8500 transitions. [2023-08-30 11:33:55,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 2052 transitions, 37951 flow [2023-08-30 11:33:57,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 2052 transitions, 35659 flow, removed 946 selfloop flow, removed 24 redundant places. [2023-08-30 11:33:57,479 INFO L231 Difference]: Finished difference. Result has 576 places, 1714 transitions, 32855 flow [2023-08-30 11:33:57,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=18881, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=537, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=111, PETRI_FLOW=32855, PETRI_PLACES=576, PETRI_TRANSITIONS=1714} [2023-08-30 11:33:57,480 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 546 predicate places. [2023-08-30 11:33:57,480 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 1714 transitions, 32855 flow [2023-08-30 11:33:57,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 73.28571428571429) internal successors, (3078), 42 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:57,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:33:57,481 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:33:57,485 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 11:33:57,681 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,SelfDestructingSolverStorable23 [2023-08-30 11:33:57,681 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:33:57,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:33:57,682 INFO L85 PathProgramCache]: Analyzing trace with hash 355555265, now seen corresponding path program 6 times [2023-08-30 11:33:57,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:33:57,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282582597] [2023-08-30 11:33:57,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:33:57,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:33:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:33:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:33:58,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:33:58,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282582597] [2023-08-30 11:33:58,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282582597] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:33:58,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560654291] [2023-08-30 11:33:58,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:33:58,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:33:58,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:33:58,925 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 11:33:58,926 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 11:33:59,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 11:33:59,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:33:59,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 11:33:59,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:33:59,222 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 11:33:59,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:33:59,282 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 11:33:59,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:33:59,341 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 11:34:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:00,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:34:01,657 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:34:01,657 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 182 treesize of output 122 [2023-08-30 11:34:01,772 INFO L321 Elim1Store]: treesize reduction 30, result has 78.7 percent of original size [2023-08-30 11:34:01,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 387 treesize of output 437 [2023-08-30 11:34:01,840 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-30 11:34:01,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 298 [2023-08-30 11:34:01,913 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-30 11:34:01,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 215 treesize of output 229 [2023-08-30 11:34:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:11,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560654291] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:34:11,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:34:11,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 41 [2023-08-30 11:34:11,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869715990] [2023-08-30 11:34:11,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:34:11,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-30 11:34:11,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:34:11,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-30 11:34:11,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1443, Unknown=5, NotChecked=0, Total=1806 [2023-08-30 11:34:14,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 307 [2023-08-30 11:34:14,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 1714 transitions, 32855 flow. Second operand has 43 states, 43 states have (on average 73.25581395348837) internal successors, (3150), 43 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:14,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:34:14,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 307 [2023-08-30 11:34:14,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:34:40,850 INFO L130 PetriNetUnfolder]: 9643/15986 cut-off events. [2023-08-30 11:34:40,851 INFO L131 PetriNetUnfolder]: For 391310/391310 co-relation queries the response was YES. [2023-08-30 11:34:41,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133016 conditions, 15986 events. 9643/15986 cut-off events. For 391310/391310 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 116072 event pairs, 995 based on Foata normal form. 152/16086 useless extension candidates. Maximal degree in co-relation 132854. Up to 9910 conditions per place. [2023-08-30 11:34:41,227 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 1394 selfloop transitions, 851 changer transitions 17/2262 dead transitions. [2023-08-30 11:34:41,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 657 places, 2262 transitions, 48974 flow [2023-08-30 11:34:41,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-08-30 11:34:41,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2023-08-30 11:34:41,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 6561 transitions. [2023-08-30 11:34:41,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24850390121960458 [2023-08-30 11:34:41,234 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 6561 transitions. [2023-08-30 11:34:41,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 6561 transitions. [2023-08-30 11:34:41,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:34:41,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 6561 transitions. [2023-08-30 11:34:41,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 76.29069767441861) internal successors, (6561), 86 states have internal predecessors, (6561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:41,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 307.0) internal successors, (26709), 87 states have internal predecessors, (26709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:41,268 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 307.0) internal successors, (26709), 87 states have internal predecessors, (26709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:41,268 INFO L175 Difference]: Start difference. First operand has 576 places, 1714 transitions, 32855 flow. Second operand 86 states and 6561 transitions. [2023-08-30 11:34:41,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 657 places, 2262 transitions, 48974 flow [2023-08-30 11:34:46,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 2262 transitions, 39260 flow, removed 4660 selfloop flow, removed 27 redundant places. [2023-08-30 11:34:46,590 INFO L231 Difference]: Finished difference. Result has 651 places, 2031 transitions, 36066 flow [2023-08-30 11:34:46,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=27002, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=570, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1000, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=36066, PETRI_PLACES=651, PETRI_TRANSITIONS=2031} [2023-08-30 11:34:46,593 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 621 predicate places. [2023-08-30 11:34:46,593 INFO L495 AbstractCegarLoop]: Abstraction has has 651 places, 2031 transitions, 36066 flow [2023-08-30 11:34:46,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 73.25581395348837) internal successors, (3150), 43 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:46,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:34:46,594 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:34:46,601 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 11:34:46,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-30 11:34:46,799 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:34:46,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:34:46,799 INFO L85 PathProgramCache]: Analyzing trace with hash 71954555, now seen corresponding path program 7 times [2023-08-30 11:34:46,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:34:46,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022850237] [2023-08-30 11:34:46,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:34:46,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:34:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:34:47,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:47,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:34:47,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022850237] [2023-08-30 11:34:47,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022850237] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:34:47,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966509282] [2023-08-30 11:34:47,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:34:47,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:34:47,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:34:47,764 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 11:34:47,765 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 11:34:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:34:47,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 11:34:47,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:34:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:48,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:34:49,421 INFO L321 Elim1Store]: treesize reduction 44, result has 57.3 percent of original size [2023-08-30 11:34:49,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 284 treesize of output 250 [2023-08-30 11:34:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:50,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966509282] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:34:50,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:34:50,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-30 11:34:50,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9012153] [2023-08-30 11:34:50,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:34:50,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 11:34:50,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:34:50,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 11:34:50,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1357, Unknown=0, NotChecked=0, Total=1640 [2023-08-30 11:34:53,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 307 [2023-08-30 11:34:53,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 651 places, 2031 transitions, 36066 flow. Second operand has 41 states, 41 states have (on average 93.3170731707317) internal successors, (3826), 41 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:53,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:34:53,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 307 [2023-08-30 11:34:53,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:35:06,831 INFO L130 PetriNetUnfolder]: 11839/19638 cut-off events. [2023-08-30 11:35:06,831 INFO L131 PetriNetUnfolder]: For 342346/342346 co-relation queries the response was YES. [2023-08-30 11:35:07,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150342 conditions, 19638 events. 11839/19638 cut-off events. For 342346/342346 co-relation queries the response was YES. Maximal size of possible extension queue 1261. Compared 148568 event pairs, 1170 based on Foata normal form. 192/19742 useless extension candidates. Maximal degree in co-relation 150165. Up to 14121 conditions per place. [2023-08-30 11:35:07,204 INFO L137 encePairwiseOnDemand]: 298/307 looper letters, 1770 selfloop transitions, 854 changer transitions 4/2628 dead transitions. [2023-08-30 11:35:07,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 2628 transitions, 53163 flow [2023-08-30 11:35:07,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-30 11:35:07,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-30 11:35:07,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 4836 transitions. [2023-08-30 11:35:07,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31504885993485343 [2023-08-30 11:35:07,208 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 4836 transitions. [2023-08-30 11:35:07,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 4836 transitions. [2023-08-30 11:35:07,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:35:07,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 4836 transitions. [2023-08-30 11:35:07,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 96.72) internal successors, (4836), 50 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:07,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 307.0) internal successors, (15657), 51 states have internal predecessors, (15657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:07,225 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 307.0) internal successors, (15657), 51 states have internal predecessors, (15657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:07,226 INFO L175 Difference]: Start difference. First operand has 651 places, 2031 transitions, 36066 flow. Second operand 50 states and 4836 transitions. [2023-08-30 11:35:07,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 700 places, 2628 transitions, 53163 flow [2023-08-30 11:35:13,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 671 places, 2628 transitions, 50216 flow, removed 1370 selfloop flow, removed 29 redundant places. [2023-08-30 11:35:13,565 INFO L231 Difference]: Finished difference. Result has 698 places, 2491 transitions, 47309 flow [2023-08-30 11:35:13,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=33531, PETRI_DIFFERENCE_MINUEND_PLACES=622, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=47309, PETRI_PLACES=698, PETRI_TRANSITIONS=2491} [2023-08-30 11:35:13,568 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 668 predicate places. [2023-08-30 11:35:13,568 INFO L495 AbstractCegarLoop]: Abstraction has has 698 places, 2491 transitions, 47309 flow [2023-08-30 11:35:13,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 93.3170731707317) internal successors, (3826), 41 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:13,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:35:13,569 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:35:13,580 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 11:35:13,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 11:35:13,781 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:35:13,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:35:13,781 INFO L85 PathProgramCache]: Analyzing trace with hash 355266965, now seen corresponding path program 8 times [2023-08-30 11:35:13,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:35:13,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864948633] [2023-08-30 11:35:13,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:35:13,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:35:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:35:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:14,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:35:14,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864948633] [2023-08-30 11:35:14,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864948633] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:35:14,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661902620] [2023-08-30 11:35:14,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:35:14,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:35:14,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:35:14,502 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 11:35:14,504 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 11:35:14,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:35:14,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:35:14,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 11:35:14,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:35:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:15,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:35:16,418 INFO L321 Elim1Store]: treesize reduction 46, result has 60.7 percent of original size [2023-08-30 11:35:16,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 287 treesize of output 266 [2023-08-30 11:35:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:20,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661902620] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:35:20,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:35:20,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 40 [2023-08-30 11:35:20,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576506149] [2023-08-30 11:35:20,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:35:20,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-30 11:35:20,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:35:20,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-30 11:35:20,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2023-08-30 11:35:24,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 307 [2023-08-30 11:35:24,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 698 places, 2491 transitions, 47309 flow. Second operand has 42 states, 42 states have (on average 98.28571428571429) internal successors, (4128), 42 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:24,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:35:24,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 307 [2023-08-30 11:35:24,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:35:50,191 INFO L130 PetriNetUnfolder]: 17303/28550 cut-off events. [2023-08-30 11:35:50,191 INFO L131 PetriNetUnfolder]: For 660528/660528 co-relation queries the response was YES. [2023-08-30 11:35:50,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245074 conditions, 28550 events. 17303/28550 cut-off events. For 660528/660528 co-relation queries the response was YES. Maximal size of possible extension queue 1446. Compared 222184 event pairs, 1262 based on Foata normal form. 728/29218 useless extension candidates. Maximal degree in co-relation 244874. Up to 12393 conditions per place. [2023-08-30 11:35:51,194 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 1303 selfloop transitions, 2699 changer transitions 9/4011 dead transitions. [2023-08-30 11:35:51,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 4011 transitions, 92286 flow [2023-08-30 11:35:51,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-08-30 11:35:51,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-08-30 11:35:51,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 7666 transitions. [2023-08-30 11:35:51,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.332942453854506 [2023-08-30 11:35:51,201 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 7666 transitions. [2023-08-30 11:35:51,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 7666 transitions. [2023-08-30 11:35:51,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:35:51,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 7666 transitions. [2023-08-30 11:35:51,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 102.21333333333334) internal successors, (7666), 75 states have internal predecessors, (7666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:51,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 307.0) internal successors, (23332), 76 states have internal predecessors, (23332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:51,226 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 307.0) internal successors, (23332), 76 states have internal predecessors, (23332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:51,226 INFO L175 Difference]: Start difference. First operand has 698 places, 2491 transitions, 47309 flow. Second operand 75 states and 7666 transitions. [2023-08-30 11:35:51,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 4011 transitions, 92286 flow [2023-08-30 11:36:03,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 715 places, 4011 transitions, 85749 flow, removed 2975 selfloop flow, removed 40 redundant places. [2023-08-30 11:36:03,644 INFO L231 Difference]: Finished difference. Result has 754 places, 3659 transitions, 84139 flow [2023-08-30 11:36:03,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=37711, PETRI_DIFFERENCE_MINUEND_PLACES=641, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=84139, PETRI_PLACES=754, PETRI_TRANSITIONS=3659} [2023-08-30 11:36:03,647 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 724 predicate places. [2023-08-30 11:36:03,647 INFO L495 AbstractCegarLoop]: Abstraction has has 754 places, 3659 transitions, 84139 flow [2023-08-30 11:36:03,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 98.28571428571429) internal successors, (4128), 42 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:36:03,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:36:03,648 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:36:03,652 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 11:36:03,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:36:03,848 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:36:03,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:36:03,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1511349299, now seen corresponding path program 9 times [2023-08-30 11:36:03,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:36:03,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617527909] [2023-08-30 11:36:03,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:36:03,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:36:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:36:05,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:36:05,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:36:05,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617527909] [2023-08-30 11:36:05,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617527909] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:36:05,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642628743] [2023-08-30 11:36:05,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:36:05,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:36:05,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:36:05,473 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 11:36:05,474 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 11:36:05,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 11:36:05,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:36:05,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 11:36:05,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:36:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:36:05,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:36:06,879 INFO L321 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2023-08-30 11:36:06,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 265 treesize of output 220 [2023-08-30 11:36:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:36:07,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642628743] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:36:07,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:36:07,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 28 [2023-08-30 11:36:07,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995638558] [2023-08-30 11:36:07,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:36:07,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 11:36:07,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:36:07,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 11:36:07,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2023-08-30 11:36:10,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 307 [2023-08-30 11:36:10,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 754 places, 3659 transitions, 84139 flow. Second operand has 30 states, 30 states have (on average 94.66666666666667) internal successors, (2840), 30 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:36:10,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:36:10,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 307 [2023-08-30 11:36:10,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:36:50,755 INFO L130 PetriNetUnfolder]: 20807/34470 cut-off events. [2023-08-30 11:36:50,755 INFO L131 PetriNetUnfolder]: For 881826/881826 co-relation queries the response was YES. [2023-08-30 11:36:51,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313066 conditions, 34470 events. 20807/34470 cut-off events. For 881826/881826 co-relation queries the response was YES. Maximal size of possible extension queue 1726. Compared 277748 event pairs, 1596 based on Foata normal form. 500/34946 useless extension candidates. Maximal degree in co-relation 312848. Up to 19883 conditions per place. [2023-08-30 11:36:51,988 INFO L137 encePairwiseOnDemand]: 298/307 looper letters, 2817 selfloop transitions, 1860 changer transitions 15/4692 dead transitions. [2023-08-30 11:36:51,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 817 places, 4692 transitions, 117053 flow [2023-08-30 11:36:51,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-08-30 11:36:51,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-08-30 11:36:51,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 6453 transitions. [2023-08-30 11:36:51,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31847793899911164 [2023-08-30 11:36:51,994 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 6453 transitions. [2023-08-30 11:36:51,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 6453 transitions. [2023-08-30 11:36:51,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:36:51,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 6453 transitions. [2023-08-30 11:36:51,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 97.77272727272727) internal successors, (6453), 66 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:36:52,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 307.0) internal successors, (20569), 67 states have internal predecessors, (20569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:36:52,010 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 307.0) internal successors, (20569), 67 states have internal predecessors, (20569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:36:52,010 INFO L175 Difference]: Start difference. First operand has 754 places, 3659 transitions, 84139 flow. Second operand 66 states and 6453 transitions. [2023-08-30 11:36:52,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 817 places, 4692 transitions, 117053 flow [2023-08-30 11:37:23,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 797 places, 4692 transitions, 100128 flow, removed 8310 selfloop flow, removed 20 redundant places. [2023-08-30 11:37:23,094 INFO L231 Difference]: Finished difference. Result has 814 places, 4373 transitions, 93599 flow [2023-08-30 11:37:23,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=69502, PETRI_DIFFERENCE_MINUEND_PLACES=732, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2099, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=93599, PETRI_PLACES=814, PETRI_TRANSITIONS=4373} [2023-08-30 11:37:23,098 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 784 predicate places. [2023-08-30 11:37:23,098 INFO L495 AbstractCegarLoop]: Abstraction has has 814 places, 4373 transitions, 93599 flow [2023-08-30 11:37:23,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 94.66666666666667) internal successors, (2840), 30 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:23,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:37:23,099 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:37:23,104 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 11:37:23,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 11:37:23,304 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:37:23,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:37:23,304 INFO L85 PathProgramCache]: Analyzing trace with hash -2133719912, now seen corresponding path program 9 times [2023-08-30 11:37:23,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:37:23,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914837660] [2023-08-30 11:37:23,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:23,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:37:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:24,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:37:24,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914837660] [2023-08-30 11:37:24,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914837660] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:37:24,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701526821] [2023-08-30 11:37:24,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:37:24,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:37:24,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:37:24,980 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 11:37:24,981 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 11:37:25,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 11:37:25,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:37:25,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 11:37:25,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:37:25,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:37:25,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:37:27,030 INFO L321 Elim1Store]: treesize reduction 44, result has 74.0 percent of original size [2023-08-30 11:37:27,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 329 treesize of output 337 [2023-08-30 11:37:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:37:33,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701526821] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:37:33,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:37:33,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 32 [2023-08-30 11:37:33,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036958811] [2023-08-30 11:37:33,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:37:33,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 11:37:33,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:37:33,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 11:37:33,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 11:37:36,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 307 [2023-08-30 11:37:36,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 814 places, 4373 transitions, 93599 flow. Second operand has 34 states, 34 states have (on average 99.5) internal successors, (3383), 34 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:36,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:37:36,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 307 [2023-08-30 11:37:36,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:38:24,804 INFO L130 PetriNetUnfolder]: 22879/37930 cut-off events. [2023-08-30 11:38:24,804 INFO L131 PetriNetUnfolder]: For 766837/766837 co-relation queries the response was YES. [2023-08-30 11:38:26,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321491 conditions, 37930 events. 22879/37930 cut-off events. For 766837/766837 co-relation queries the response was YES. Maximal size of possible extension queue 2037. Compared 310307 event pairs, 2200 based on Foata normal form. 88/37990 useless extension candidates. Maximal degree in co-relation 321257. Up to 28027 conditions per place. [2023-08-30 11:38:26,229 INFO L137 encePairwiseOnDemand]: 298/307 looper letters, 3859 selfloop transitions, 1108 changer transitions 12/4979 dead transitions. [2023-08-30 11:38:26,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 864 places, 4979 transitions, 116404 flow [2023-08-30 11:38:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-30 11:38:26,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-30 11:38:26,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 5210 transitions. [2023-08-30 11:38:26,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33275851057035194 [2023-08-30 11:38:26,237 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 5210 transitions. [2023-08-30 11:38:26,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 5210 transitions. [2023-08-30 11:38:26,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:38:26,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 5210 transitions. [2023-08-30 11:38:26,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 102.15686274509804) internal successors, (5210), 51 states have internal predecessors, (5210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:26,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 307.0) internal successors, (15964), 52 states have internal predecessors, (15964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:26,255 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 307.0) internal successors, (15964), 52 states have internal predecessors, (15964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:26,255 INFO L175 Difference]: Start difference. First operand has 814 places, 4373 transitions, 93599 flow. Second operand 51 states and 5210 transitions. [2023-08-30 11:38:26,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 864 places, 4979 transitions, 116404 flow [2023-08-30 11:38:55,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 833 places, 4979 transitions, 111645 flow, removed 1867 selfloop flow, removed 31 redundant places. [2023-08-30 11:38:55,649 INFO L231 Difference]: Finished difference. Result has 846 places, 4708 transitions, 101868 flow [2023-08-30 11:38:55,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=89444, PETRI_DIFFERENCE_MINUEND_PLACES=783, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=792, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=101868, PETRI_PLACES=846, PETRI_TRANSITIONS=4708} [2023-08-30 11:38:55,654 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 816 predicate places. [2023-08-30 11:38:55,654 INFO L495 AbstractCegarLoop]: Abstraction has has 846 places, 4708 transitions, 101868 flow [2023-08-30 11:38:55,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 99.5) internal successors, (3383), 34 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:55,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:38:55,655 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:38:55,667 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 11:38:55,861 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,SelfDestructingSolverStorable28 [2023-08-30 11:38:55,861 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:38:55,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:38:55,862 INFO L85 PathProgramCache]: Analyzing trace with hash 2114439413, now seen corresponding path program 10 times [2023-08-30 11:38:55,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:38:55,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113536765] [2023-08-30 11:38:55,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:38:55,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:38:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:38:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:38:58,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:38:58,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113536765] [2023-08-30 11:38:58,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113536765] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:38:58,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258408976] [2023-08-30 11:38:58,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:38:58,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:38:58,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:38:58,132 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 11:38:58,134 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 11:38:58,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:38:58,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:38:58,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 11:38:58,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:38:58,894 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:38:58,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:38:59,944 INFO L321 Elim1Store]: treesize reduction 28, result has 72.8 percent of original size [2023-08-30 11:38:59,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 288 treesize of output 270 [2023-08-30 11:39:00,810 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 11:39:00,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258408976] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:39:00,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:39:00,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 10] total 39 [2023-08-30 11:39:00,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682991899] [2023-08-30 11:39:00,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:39:00,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 11:39:00,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:39:00,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 11:39:00,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2023-08-30 11:39:05,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 307 [2023-08-30 11:39:05,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 846 places, 4708 transitions, 101868 flow. Second operand has 41 states, 41 states have (on average 94.34146341463415) internal successors, (3868), 41 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:05,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:39:05,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 307 [2023-08-30 11:39:05,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:40:00,765 INFO L130 PetriNetUnfolder]: 25525/42440 cut-off events. [2023-08-30 11:40:00,766 INFO L131 PetriNetUnfolder]: For 872603/872603 co-relation queries the response was YES. [2023-08-30 11:40:02,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361176 conditions, 42440 events. 25525/42440 cut-off events. For 872603/872603 co-relation queries the response was YES. Maximal size of possible extension queue 2116. Compared 352862 event pairs, 2278 based on Foata normal form. 60/42472 useless extension candidates. Maximal degree in co-relation 360933. Up to 29413 conditions per place. [2023-08-30 11:40:02,589 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 4017 selfloop transitions, 1419 changer transitions 23/5459 dead transitions. [2023-08-30 11:40:02,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 906 places, 5459 transitions, 128873 flow [2023-08-30 11:40:02,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-08-30 11:40:02,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-08-30 11:40:02,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 5933 transitions. [2023-08-30 11:40:02,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3168152934266033 [2023-08-30 11:40:02,594 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 5933 transitions. [2023-08-30 11:40:02,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 5933 transitions. [2023-08-30 11:40:02,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:40:02,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 5933 transitions. [2023-08-30 11:40:02,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 97.26229508196721) internal successors, (5933), 61 states have internal predecessors, (5933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:02,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 307.0) internal successors, (19034), 62 states have internal predecessors, (19034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:02,612 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 307.0) internal successors, (19034), 62 states have internal predecessors, (19034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:02,613 INFO L175 Difference]: Start difference. First operand has 846 places, 4708 transitions, 101868 flow. Second operand 61 states and 5933 transitions. [2023-08-30 11:40:02,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 906 places, 5459 transitions, 128873 flow [2023-08-30 11:40:40,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 888 places, 5459 transitions, 127060 flow, removed 862 selfloop flow, removed 18 redundant places. [2023-08-30 11:40:40,491 INFO L231 Difference]: Finished difference. Result has 901 places, 5122 transitions, 115869 flow [2023-08-30 11:40:40,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=100303, PETRI_DIFFERENCE_MINUEND_PLACES=828, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1008, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=115869, PETRI_PLACES=901, PETRI_TRANSITIONS=5122} [2023-08-30 11:40:40,494 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 871 predicate places. [2023-08-30 11:40:40,494 INFO L495 AbstractCegarLoop]: Abstraction has has 901 places, 5122 transitions, 115869 flow [2023-08-30 11:40:40,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 94.34146341463415) internal successors, (3868), 41 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:40,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:40:40,495 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:40:40,499 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 11:40:40,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:40:40,695 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:40:40,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:40:40,696 INFO L85 PathProgramCache]: Analyzing trace with hash 241348892, now seen corresponding path program 10 times [2023-08-30 11:40:40,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:40:40,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549900007] [2023-08-30 11:40:40,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:40:40,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:40:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:40:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:40:42,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:40:42,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549900007] [2023-08-30 11:40:42,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549900007] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:40:42,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356460641] [2023-08-30 11:40:42,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:40:42,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:40:42,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:40:42,153 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 11:40:42,155 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 11:40:42,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:40:42,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:40:42,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 11:40:42,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:40:42,363 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 11:40:42,437 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-08-30 11:40:42,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2023-08-30 11:40:42,540 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-08-30 11:40:42,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 45 [2023-08-30 11:40:42,651 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-08-30 11:40:42,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 45 [2023-08-30 11:40:42,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:40:42,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2023-08-30 11:40:42,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:40:42,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2023-08-30 11:40:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:40:43,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:40:46,729 INFO L321 Elim1Store]: treesize reduction 112, result has 40.4 percent of original size [2023-08-30 11:40:46,730 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 1 new quantified variables, introduced 4 case distinctions, treesize of input 366 treesize of output 210 [2023-08-30 11:40:47,175 INFO L321 Elim1Store]: treesize reduction 10, result has 96.9 percent of original size [2023-08-30 11:40:47,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 1135 treesize of output 1297 [2023-08-30 11:40:47,304 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 11:40:47,361 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:40:47,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 391 treesize of output 430 [2023-08-30 11:40:47,583 INFO L321 Elim1Store]: treesize reduction 10, result has 89.7 percent of original size [2023-08-30 11:40:47,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 369 treesize of output 361 Killed by 15