./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 11:27:24,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 11:27:24,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 11:27:24,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 11:27:24,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 11:27:24,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 11:27:24,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 11:27:24,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 11:27:24,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 11:27:24,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 11:27:24,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 11:27:24,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 11:27:24,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 11:27:24,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 11:27:24,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 11:27:24,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 11:27:24,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 11:27:24,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 11:27:24,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 11:27:24,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 11:27:24,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 11:27:24,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 11:27:24,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 11:27:24,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 11:27:24,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 11:27:24,256 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 11:27:24,256 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 11:27:24,258 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 11:27:24,259 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 11:27:24,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 11:27:24,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 11:27:24,266 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 11:27:24,267 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 11:27:24,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 11:27:24,269 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 11:27:24,269 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 11:27:24,270 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 11:27:24,270 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 11:27:24,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 11:27:24,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 11:27:24,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 11:27:24,273 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 11:27:24,305 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 11:27:24,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 11:27:24,306 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 11:27:24,306 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 11:27:24,307 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 11:27:24,307 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 11:27:24,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 11:27:24,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 11:27:24,308 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 11:27:24,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 11:27:24,309 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 11:27:24,309 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 11:27:24,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 11:27:24,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 11:27:24,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 11:27:24,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 11:27:24,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 11:27:24,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 11:27:24,311 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 11:27:24,311 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 11:27:24,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 11:27:24,311 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 11:27:24,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 11:27:24,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 11:27:24,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 11:27:24,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 11:27:24,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:27:24,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 11:27:24,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 11:27:24,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 11:27:24,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 11:27:24,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 11:27:24,314 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 11:27:24,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 11:27:24,314 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 11:27:24,314 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 11:27:24,314 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 11:27:24,314 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 11:27:24,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 11:27:24,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 11:27:24,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 11:27:24,600 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 11:27:24,600 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 11:27:24,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-08-30 11:27:25,684 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 11:27:25,890 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 11:27:25,891 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-08-30 11:27:25,899 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46df13f0e/7413a748cc4f44b49a36846121136096/FLAG9ef020818 [2023-08-30 11:27:25,918 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46df13f0e/7413a748cc4f44b49a36846121136096 [2023-08-30 11:27:25,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 11:27:25,922 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 11:27:25,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 11:27:25,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 11:27:25,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 11:27:25,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:27:25" (1/1) ... [2023-08-30 11:27:25,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4292637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:25, skipping insertion in model container [2023-08-30 11:27:25,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:27:25" (1/1) ... [2023-08-30 11:27:25,936 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 11:27:25,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 11:27:26,140 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2023-08-30 11:27:26,157 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:27:26,167 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 11:27:26,199 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2023-08-30 11:27:26,213 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:27:26,221 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:27:26,223 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:27:26,228 INFO L208 MainTranslator]: Completed translation [2023-08-30 11:27:26,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:26 WrapperNode [2023-08-30 11:27:26,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 11:27:26,231 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 11:27:26,231 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 11:27:26,231 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 11:27:26,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:26" (1/1) ... [2023-08-30 11:27:26,254 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:26" (1/1) ... [2023-08-30 11:27:26,288 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 174 [2023-08-30 11:27:26,289 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 11:27:26,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 11:27:26,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 11:27:26,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 11:27:26,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:26" (1/1) ... [2023-08-30 11:27:26,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:26" (1/1) ... [2023-08-30 11:27:26,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:26" (1/1) ... [2023-08-30 11:27:26,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:26" (1/1) ... [2023-08-30 11:27:26,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:26" (1/1) ... [2023-08-30 11:27:26,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:26" (1/1) ... [2023-08-30 11:27:26,324 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:26" (1/1) ... [2023-08-30 11:27:26,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:26" (1/1) ... [2023-08-30 11:27:26,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 11:27:26,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 11:27:26,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 11:27:26,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 11:27:26,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:26" (1/1) ... [2023-08-30 11:27:26,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:27:26,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:26,369 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 11:27:26,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 11:27:26,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 11:27:26,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 11:27:26,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 11:27:26,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 11:27:26,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 11:27:26,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 11:27:26,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 11:27:26,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 11:27:26,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 11:27:26,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 11:27:26,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 11:27:26,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 11:27:26,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 11:27:26,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 11:27:26,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 11:27:26,404 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 11:27:26,554 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 11:27:26,556 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 11:27:26,892 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 11:27:27,151 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 11:27:27,151 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 11:27:27,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:27:27 BoogieIcfgContainer [2023-08-30 11:27:27,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 11:27:27,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 11:27:27,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 11:27:27,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 11:27:27,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:27:25" (1/3) ... [2023-08-30 11:27:27,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c57bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:27:27, skipping insertion in model container [2023-08-30 11:27:27,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:27:26" (2/3) ... [2023-08-30 11:27:27,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c57bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:27:27, skipping insertion in model container [2023-08-30 11:27:27,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:27:27" (3/3) ... [2023-08-30 11:27:27,160 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2023-08-30 11:27:27,167 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 11:27:27,175 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 11:27:27,175 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-08-30 11:27:27,175 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 11:27:27,306 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 11:27:27,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 131 transitions, 278 flow [2023-08-30 11:27:27,415 INFO L130 PetriNetUnfolder]: 9/129 cut-off events. [2023-08-30 11:27:27,415 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 11:27:27,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 129 events. 9/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 162 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2023-08-30 11:27:27,420 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 131 transitions, 278 flow [2023-08-30 11:27:27,425 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 113 transitions, 235 flow [2023-08-30 11:27:27,429 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 11:27:27,440 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 113 transitions, 235 flow [2023-08-30 11:27:27,444 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 113 transitions, 235 flow [2023-08-30 11:27:27,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 113 transitions, 235 flow [2023-08-30 11:27:27,492 INFO L130 PetriNetUnfolder]: 8/113 cut-off events. [2023-08-30 11:27:27,493 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 11:27:27,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 113 events. 8/113 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 160 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2023-08-30 11:27:27,497 INFO L119 LiptonReduction]: Number of co-enabled transitions 1400 [2023-08-30 11:27:36,076 INFO L134 LiptonReduction]: Checked pairs total: 1701 [2023-08-30 11:27:36,077 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-30 11:27:36,089 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 11:27:36,095 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;@1def29f3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 11:27:36,095 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2023-08-30 11:27:36,098 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 11:27:36,098 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 11:27:36,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:36,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 11:27:36,100 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:36,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:36,104 INFO L85 PathProgramCache]: Analyzing trace with hash 22705, now seen corresponding path program 1 times [2023-08-30 11:27:36,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:36,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870913277] [2023-08-30 11:27:36,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:36,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:36,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:36,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:36,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870913277] [2023-08-30 11:27:36,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870913277] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:27:36,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:27:36,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:27:36,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223588237] [2023-08-30 11:27:36,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:27:36,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:27:36,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:36,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:27:36,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:27:36,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 247 [2023-08-30 11:27:36,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:36,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:36,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 247 [2023-08-30 11:27:36,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:36,946 INFO L130 PetriNetUnfolder]: 929/1331 cut-off events. [2023-08-30 11:27:36,947 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-30 11:27:36,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2704 conditions, 1331 events. 929/1331 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 6757 event pairs, 444 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 1230. Up to 658 conditions per place. [2023-08-30 11:27:36,962 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 49 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-30 11:27:36,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 53 transitions, 226 flow [2023-08-30 11:27:36,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:27:36,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:27:36,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2023-08-30 11:27:36,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4993252361673414 [2023-08-30 11:27:36,981 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2023-08-30 11:27:36,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2023-08-30 11:27:36,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:36,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2023-08-30 11:27:36,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:36,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:36,998 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:37,000 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 75 flow. Second operand 3 states and 370 transitions. [2023-08-30 11:27:37,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 53 transitions, 226 flow [2023-08-30 11:27:37,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 53 transitions, 216 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 11:27:37,009 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 76 flow [2023-08-30 11:27:37,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-08-30 11:27:37,015 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2023-08-30 11:27:37,016 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 76 flow [2023-08-30 11:27:37,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:37,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:37,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 11:27:37,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 11:27:37,020 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:37,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:37,029 INFO L85 PathProgramCache]: Analyzing trace with hash 704550, now seen corresponding path program 1 times [2023-08-30 11:27:37,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:37,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957165803] [2023-08-30 11:27:37,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:37,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:37,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:37,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957165803] [2023-08-30 11:27:37,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957165803] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:27:37,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:27:37,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:27:37,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159702671] [2023-08-30 11:27:37,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:27:37,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:27:37,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:37,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:27:37,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:27:37,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 247 [2023-08-30 11:27:37,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:37,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:37,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 247 [2023-08-30 11:27:37,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:37,421 INFO L130 PetriNetUnfolder]: 929/1330 cut-off events. [2023-08-30 11:27:37,421 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 11:27:37,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2687 conditions, 1330 events. 929/1330 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 6721 event pairs, 444 based on Foata normal form. 0/359 useless extension candidates. Maximal degree in co-relation 1341. Up to 1310 conditions per place. [2023-08-30 11:27:37,428 INFO L137 encePairwiseOnDemand]: 245/247 looper letters, 26 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-30 11:27:37,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 126 flow [2023-08-30 11:27:37,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:27:37,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:27:37,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 336 transitions. [2023-08-30 11:27:37,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4534412955465587 [2023-08-30 11:27:37,431 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 336 transitions. [2023-08-30 11:27:37,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 336 transitions. [2023-08-30 11:27:37,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:37,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 336 transitions. [2023-08-30 11:27:37,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:37,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:37,434 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:37,435 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 76 flow. Second operand 3 states and 336 transitions. [2023-08-30 11:27:37,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 126 flow [2023-08-30 11:27:37,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 124 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:27:37,436 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 72 flow [2023-08-30 11:27:37,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2023-08-30 11:27:37,437 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2023-08-30 11:27:37,437 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 72 flow [2023-08-30 11:27:37,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:37,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:37,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 11:27:37,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 11:27:37,438 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:37,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:37,439 INFO L85 PathProgramCache]: Analyzing trace with hash 704552, now seen corresponding path program 1 times [2023-08-30 11:27:37,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:37,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581192374] [2023-08-30 11:27:37,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:37,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:37,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:37,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:37,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581192374] [2023-08-30 11:27:37,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581192374] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:37,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354031007] [2023-08-30 11:27:37,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:37,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:37,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:37,553 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:27:37,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 11:27:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:37,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:27:37,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:37,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:37,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354031007] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:37,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:37,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 11:27:37,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877592150] [2023-08-30 11:27:37,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:37,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:27:37,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:37,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:27:37,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:27:37,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 247 [2023-08-30 11:27:37,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 72 flow. Second operand has 7 states, 7 states have (on average 104.14285714285714) internal successors, (729), 7 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:37,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:37,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 247 [2023-08-30 11:27:37,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:38,375 INFO L130 PetriNetUnfolder]: 2321/3322 cut-off events. [2023-08-30 11:27:38,375 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 11:27:38,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6701 conditions, 3322 events. 2321/3322 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 18330 event pairs, 1110 based on Foata normal form. 0/932 useless extension candidates. Maximal degree in co-relation 6693. Up to 657 conditions per place. [2023-08-30 11:27:38,390 INFO L137 encePairwiseOnDemand]: 244/247 looper letters, 117 selfloop transitions, 5 changer transitions 0/124 dead transitions. [2023-08-30 11:27:38,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 124 transitions, 528 flow [2023-08-30 11:27:38,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 11:27:38,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 11:27:38,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 743 transitions. [2023-08-30 11:27:38,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013495276653172 [2023-08-30 11:27:38,393 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 743 transitions. [2023-08-30 11:27:38,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 743 transitions. [2023-08-30 11:27:38,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:38,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 743 transitions. [2023-08-30 11:27:38,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 123.83333333333333) internal successors, (743), 6 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:38,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 247.0) internal successors, (1729), 7 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:38,399 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 247.0) internal successors, (1729), 7 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:38,399 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 72 flow. Second operand 6 states and 743 transitions. [2023-08-30 11:27:38,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 124 transitions, 528 flow [2023-08-30 11:27:38,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 124 transitions, 527 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:27:38,402 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 107 flow [2023-08-30 11:27:38,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=107, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2023-08-30 11:27:38,403 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-08-30 11:27:38,403 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 107 flow [2023-08-30 11:27:38,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.14285714285714) internal successors, (729), 7 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:38,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:38,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 11:27:38,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 11:27:38,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:38,609 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:38,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:38,609 INFO L85 PathProgramCache]: Analyzing trace with hash 677138257, now seen corresponding path program 1 times [2023-08-30 11:27:38,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:38,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470371722] [2023-08-30 11:27:38,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:38,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:38,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:38,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:38,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470371722] [2023-08-30 11:27:38,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470371722] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:27:38,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:27:38,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 11:27:38,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077165830] [2023-08-30 11:27:38,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:27:38,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 11:27:38,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:38,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 11:27:38,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 11:27:38,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 247 [2023-08-30 11:27:38,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 107 flow. Second operand has 5 states, 5 states have (on average 98.0) internal successors, (490), 5 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:38,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:38,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 247 [2023-08-30 11:27:38,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:39,171 INFO L130 PetriNetUnfolder]: 1474/2347 cut-off events. [2023-08-30 11:27:39,171 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 11:27:39,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4767 conditions, 2347 events. 1474/2347 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 14155 event pairs, 899 based on Foata normal form. 0/856 useless extension candidates. Maximal degree in co-relation 4755. Up to 2123 conditions per place. [2023-08-30 11:27:39,182 INFO L137 encePairwiseOnDemand]: 235/247 looper letters, 51 selfloop transitions, 4 changer transitions 2/58 dead transitions. [2023-08-30 11:27:39,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 58 transitions, 279 flow [2023-08-30 11:27:39,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:27:39,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:27:39,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 548 transitions. [2023-08-30 11:27:39,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4437246963562753 [2023-08-30 11:27:39,185 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 548 transitions. [2023-08-30 11:27:39,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 548 transitions. [2023-08-30 11:27:39,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:39,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 548 transitions. [2023-08-30 11:27:39,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.6) internal successors, (548), 5 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:39,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:39,190 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:39,190 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 107 flow. Second operand 5 states and 548 transitions. [2023-08-30 11:27:39,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 58 transitions, 279 flow [2023-08-30 11:27:39,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 271 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 11:27:39,194 INFO L231 Difference]: Finished difference. Result has 46 places, 34 transitions, 139 flow [2023-08-30 11:27:39,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=139, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2023-08-30 11:27:39,196 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2023-08-30 11:27:39,196 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 139 flow [2023-08-30 11:27:39,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.0) internal successors, (490), 5 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:39,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:39,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:27:39,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 11:27:39,197 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:39,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:39,198 INFO L85 PathProgramCache]: Analyzing trace with hash -484853788, now seen corresponding path program 1 times [2023-08-30 11:27:39,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:39,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435368156] [2023-08-30 11:27:39,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:39,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:39,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:27:39,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:39,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435368156] [2023-08-30 11:27:39,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435368156] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:27:39,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:27:39,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:27:39,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196697101] [2023-08-30 11:27:39,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:27:39,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:27:39,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:39,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:27:39,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:27:39,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 247 [2023-08-30 11:27:39,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:39,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:39,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 247 [2023-08-30 11:27:39,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:39,826 INFO L130 PetriNetUnfolder]: 2858/4283 cut-off events. [2023-08-30 11:27:39,826 INFO L131 PetriNetUnfolder]: For 602/617 co-relation queries the response was YES. [2023-08-30 11:27:39,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10294 conditions, 4283 events. 2858/4283 cut-off events. For 602/617 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 27782 event pairs, 947 based on Foata normal form. 2/1818 useless extension candidates. Maximal degree in co-relation 10278. Up to 2412 conditions per place. [2023-08-30 11:27:39,856 INFO L137 encePairwiseOnDemand]: 243/247 looper letters, 49 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-08-30 11:27:39,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 53 transitions, 298 flow [2023-08-30 11:27:39,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:27:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:27:39,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-08-30 11:27:39,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48582995951417 [2023-08-30 11:27:39,858 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-08-30 11:27:39,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-08-30 11:27:39,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:39,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-08-30 11:27:39,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:39,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:39,862 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:39,862 INFO L175 Difference]: Start difference. First operand has 46 places, 34 transitions, 139 flow. Second operand 3 states and 360 transitions. [2023-08-30 11:27:39,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 53 transitions, 298 flow [2023-08-30 11:27:39,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 292 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 11:27:39,867 INFO L231 Difference]: Finished difference. Result has 47 places, 35 transitions, 152 flow [2023-08-30 11:27:39,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2023-08-30 11:27:39,869 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 10 predicate places. [2023-08-30 11:27:39,870 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 152 flow [2023-08-30 11:27:39,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:39,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:39,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:27:39,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 11:27:39,871 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:39,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:39,874 INFO L85 PathProgramCache]: Analyzing trace with hash -484853827, now seen corresponding path program 1 times [2023-08-30 11:27:39,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:39,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109057035] [2023-08-30 11:27:39,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:39,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:39,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:40,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:40,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109057035] [2023-08-30 11:27:40,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109057035] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:40,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352675725] [2023-08-30 11:27:40,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:40,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:40,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:40,145 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:27:40,174 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 11:27:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:40,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 11:27:40,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:40,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:27:40,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:40,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:27:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:40,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:40,388 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_103 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_103) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967296)) is different from false [2023-08-30 11:27:40,410 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:40,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-08-30 11:27:40,426 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:40,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2023-08-30 11:27:40,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-30 11:27:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 11:27:40,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352675725] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:40,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:40,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-30 11:27:40,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306657643] [2023-08-30 11:27:40,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:40,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 11:27:40,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:40,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 11:27:40,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2023-08-30 11:27:40,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 11:27:40,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 152 flow. Second operand has 12 states, 12 states have (on average 81.25) internal successors, (975), 12 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:40,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:40,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 11:27:40,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:41,381 INFO L130 PetriNetUnfolder]: 3167/5196 cut-off events. [2023-08-30 11:27:41,381 INFO L131 PetriNetUnfolder]: For 1803/1803 co-relation queries the response was YES. [2023-08-30 11:27:41,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12741 conditions, 5196 events. 3167/5196 cut-off events. For 1803/1803 co-relation queries the response was YES. Maximal size of possible extension queue 917. Compared 39307 event pairs, 684 based on Foata normal form. 0/2447 useless extension candidates. Maximal degree in co-relation 12725. Up to 2977 conditions per place. [2023-08-30 11:27:41,438 INFO L137 encePairwiseOnDemand]: 235/247 looper letters, 55 selfloop transitions, 18 changer transitions 1/75 dead transitions. [2023-08-30 11:27:41,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 75 transitions, 426 flow [2023-08-30 11:27:41,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 11:27:41,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 11:27:41,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 711 transitions. [2023-08-30 11:27:41,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3598178137651822 [2023-08-30 11:27:41,442 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 711 transitions. [2023-08-30 11:27:41,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 711 transitions. [2023-08-30 11:27:41,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:41,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 711 transitions. [2023-08-30 11:27:41,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 88.875) internal successors, (711), 8 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:41,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 247.0) internal successors, (2223), 9 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:41,447 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 247.0) internal successors, (2223), 9 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:41,447 INFO L175 Difference]: Start difference. First operand has 47 places, 35 transitions, 152 flow. Second operand 8 states and 711 transitions. [2023-08-30 11:27:41,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 75 transitions, 426 flow [2023-08-30 11:27:41,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 421 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:27:41,450 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 265 flow [2023-08-30 11:27:41,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=265, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2023-08-30 11:27:41,451 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2023-08-30 11:27:41,451 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 265 flow [2023-08-30 11:27:41,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 81.25) internal successors, (975), 12 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:41,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:41,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:27:41,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 11:27:41,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-30 11:27:41,657 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:41,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:41,658 INFO L85 PathProgramCache]: Analyzing trace with hash -484853828, now seen corresponding path program 1 times [2023-08-30 11:27:41,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:41,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557300932] [2023-08-30 11:27:41,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:41,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:41,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:41,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557300932] [2023-08-30 11:27:41,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557300932] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:41,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479566434] [2023-08-30 11:27:41,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:41,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:41,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:41,933 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:27:41,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 11:27:42,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:42,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 11:27:42,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:42,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:27:42,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:42,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:27:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:42,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:42,169 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_132 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_132) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 9223372039002259456))) is different from false [2023-08-30 11:27:42,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:42,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-08-30 11:27:42,190 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:42,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 35 [2023-08-30 11:27:42,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-08-30 11:27:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 11:27:42,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479566434] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:42,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:42,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-30 11:27:42,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999932979] [2023-08-30 11:27:42,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:42,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 11:27:42,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:42,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 11:27:42,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2023-08-30 11:27:42,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 11:27:42,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 265 flow. Second operand has 12 states, 12 states have (on average 81.25) internal successors, (975), 12 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:42,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:42,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 11:27:42,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:43,158 INFO L130 PetriNetUnfolder]: 3315/5340 cut-off events. [2023-08-30 11:27:43,159 INFO L131 PetriNetUnfolder]: For 2812/2820 co-relation queries the response was YES. [2023-08-30 11:27:43,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14068 conditions, 5340 events. 3315/5340 cut-off events. For 2812/2820 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 39927 event pairs, 980 based on Foata normal form. 0/2707 useless extension candidates. Maximal degree in co-relation 14049. Up to 3129 conditions per place. [2023-08-30 11:27:43,187 INFO L137 encePairwiseOnDemand]: 235/247 looper letters, 54 selfloop transitions, 20 changer transitions 1/76 dead transitions. [2023-08-30 11:27:43,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 490 flow [2023-08-30 11:27:43,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 11:27:43,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 11:27:43,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 710 transitions. [2023-08-30 11:27:43,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35931174089068824 [2023-08-30 11:27:43,190 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 710 transitions. [2023-08-30 11:27:43,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 710 transitions. [2023-08-30 11:27:43,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:43,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 710 transitions. [2023-08-30 11:27:43,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 88.75) internal successors, (710), 8 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:43,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 247.0) internal successors, (2223), 9 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:43,195 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 247.0) internal successors, (2223), 9 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:43,195 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 265 flow. Second operand 8 states and 710 transitions. [2023-08-30 11:27:43,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 490 flow [2023-08-30 11:27:43,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 76 transitions, 477 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-30 11:27:43,201 INFO L231 Difference]: Finished difference. Result has 61 places, 50 transitions, 301 flow [2023-08-30 11:27:43,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=301, PETRI_PLACES=61, PETRI_TRANSITIONS=50} [2023-08-30 11:27:43,202 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 24 predicate places. [2023-08-30 11:27:43,202 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 50 transitions, 301 flow [2023-08-30 11:27:43,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 81.25) internal successors, (975), 12 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:43,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:43,203 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 11:27:43,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 11:27:43,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:43,409 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:43,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:43,410 INFO L85 PathProgramCache]: Analyzing trace with hash -484897293, now seen corresponding path program 2 times [2023-08-30 11:27:43,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:43,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923998455] [2023-08-30 11:27:43,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:43,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:43,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:43,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923998455] [2023-08-30 11:27:43,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923998455] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:43,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065770324] [2023-08-30 11:27:43,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:27:43,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:43,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:43,493 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:27:43,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 11:27:43,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:27:43,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:27:43,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 11:27:43,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:27:43,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:27:43,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065770324] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:27:43,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:27:43,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 11:27:43,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202997028] [2023-08-30 11:27:43,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:27:43,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:27:43,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:43,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:27:43,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:27:43,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 247 [2023-08-30 11:27:43,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 50 transitions, 301 flow. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:43,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:43,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 247 [2023-08-30 11:27:43,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:44,161 INFO L130 PetriNetUnfolder]: 3101/5108 cut-off events. [2023-08-30 11:27:44,161 INFO L131 PetriNetUnfolder]: For 4079/4114 co-relation queries the response was YES. [2023-08-30 11:27:44,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13905 conditions, 5108 events. 3101/5108 cut-off events. For 4079/4114 co-relation queries the response was YES. Maximal size of possible extension queue 941. Compared 39105 event pairs, 1678 based on Foata normal form. 35/2661 useless extension candidates. Maximal degree in co-relation 13885. Up to 5041 conditions per place. [2023-08-30 11:27:44,189 INFO L137 encePairwiseOnDemand]: 245/247 looper letters, 44 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-08-30 11:27:44,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 49 transitions, 381 flow [2023-08-30 11:27:44,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:27:44,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:27:44,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2023-08-30 11:27:44,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45614035087719296 [2023-08-30 11:27:44,191 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2023-08-30 11:27:44,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2023-08-30 11:27:44,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:44,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2023-08-30 11:27:44,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:44,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:44,194 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:44,194 INFO L175 Difference]: Start difference. First operand has 61 places, 50 transitions, 301 flow. Second operand 3 states and 338 transitions. [2023-08-30 11:27:44,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 49 transitions, 381 flow [2023-08-30 11:27:44,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 362 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-30 11:27:44,202 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 274 flow [2023-08-30 11:27:44,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=274, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2023-08-30 11:27:44,203 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2023-08-30 11:27:44,203 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 274 flow [2023-08-30 11:27:44,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:44,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:44,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:27:44,210 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 11:27:44,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:44,410 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:44,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:44,411 INFO L85 PathProgramCache]: Analyzing trace with hash -484853824, now seen corresponding path program 1 times [2023-08-30 11:27:44,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:44,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011450133] [2023-08-30 11:27:44,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:44,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:27:44,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:44,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011450133] [2023-08-30 11:27:44,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011450133] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:27:44,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:27:44,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:27:44,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121147585] [2023-08-30 11:27:44,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:27:44,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:27:44,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:44,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:27:44,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:27:44,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 247 [2023-08-30 11:27:44,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:44,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:44,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 247 [2023-08-30 11:27:44,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:45,162 INFO L130 PetriNetUnfolder]: 2992/4991 cut-off events. [2023-08-30 11:27:45,163 INFO L131 PetriNetUnfolder]: For 3813/3863 co-relation queries the response was YES. [2023-08-30 11:27:45,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13834 conditions, 4991 events. 2992/4991 cut-off events. For 3813/3863 co-relation queries the response was YES. Maximal size of possible extension queue 859. Compared 36959 event pairs, 777 based on Foata normal form. 89/2898 useless extension candidates. Maximal degree in co-relation 13817. Up to 4473 conditions per place. [2023-08-30 11:27:45,195 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 52 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2023-08-30 11:27:45,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 62 transitions, 440 flow [2023-08-30 11:27:45,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:27:45,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:27:45,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-08-30 11:27:45,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4844804318488529 [2023-08-30 11:27:45,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-08-30 11:27:45,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-08-30 11:27:45,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:45,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-08-30 11:27:45,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:45,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:45,200 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:45,201 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 274 flow. Second operand 3 states and 359 transitions. [2023-08-30 11:27:45,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 62 transitions, 440 flow [2023-08-30 11:27:45,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 62 transitions, 439 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:27:45,205 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 317 flow [2023-08-30 11:27:45,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2023-08-30 11:27:45,206 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 20 predicate places. [2023-08-30 11:27:45,206 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 317 flow [2023-08-30 11:27:45,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:45,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:45,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:45,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 11:27:45,207 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:45,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:45,208 INFO L85 PathProgramCache]: Analyzing trace with hash -2145564433, now seen corresponding path program 1 times [2023-08-30 11:27:45,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:45,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041573054] [2023-08-30 11:27:45,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:45,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:45,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:45,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041573054] [2023-08-30 11:27:45,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041573054] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:45,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498587771] [2023-08-30 11:27:45,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:45,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:45,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:45,289 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:27:45,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 11:27:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:45,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 11:27:45,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:45,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:45,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:45,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:45,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498587771] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:45,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:45,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-30 11:27:45,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727469001] [2023-08-30 11:27:45,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:45,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 11:27:45,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:45,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 11:27:45,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-30 11:27:45,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 11:27:45,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 317 flow. Second operand has 14 states, 14 states have (on average 95.28571428571429) internal successors, (1334), 14 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:45,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:45,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 11:27:45,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:46,475 INFO L130 PetriNetUnfolder]: 2639/4402 cut-off events. [2023-08-30 11:27:46,475 INFO L131 PetriNetUnfolder]: For 6292/6295 co-relation queries the response was YES. [2023-08-30 11:27:46,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14128 conditions, 4402 events. 2639/4402 cut-off events. For 6292/6295 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 32386 event pairs, 1151 based on Foata normal form. 125/2976 useless extension candidates. Maximal degree in co-relation 14109. Up to 2924 conditions per place. [2023-08-30 11:27:46,500 INFO L137 encePairwiseOnDemand]: 234/247 looper letters, 147 selfloop transitions, 14 changer transitions 6/168 dead transitions. [2023-08-30 11:27:46,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 168 transitions, 1126 flow [2023-08-30 11:27:46,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 11:27:46,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 11:27:46,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1268 transitions. [2023-08-30 11:27:46,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42780026990553305 [2023-08-30 11:27:46,504 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1268 transitions. [2023-08-30 11:27:46,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1268 transitions. [2023-08-30 11:27:46,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:46,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1268 transitions. [2023-08-30 11:27:46,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 105.66666666666667) internal successors, (1268), 12 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:46,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:46,511 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:46,511 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 317 flow. Second operand 12 states and 1268 transitions. [2023-08-30 11:27:46,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 168 transitions, 1126 flow [2023-08-30 11:27:46,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 168 transitions, 1103 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:27:46,524 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 469 flow [2023-08-30 11:27:46,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=469, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2023-08-30 11:27:46,526 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 35 predicate places. [2023-08-30 11:27:46,526 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 469 flow [2023-08-30 11:27:46,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 95.28571428571429) internal successors, (1334), 14 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:46,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:46,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:46,535 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 11:27:46,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-30 11:27:46,733 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:46,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:46,733 INFO L85 PathProgramCache]: Analyzing trace with hash -2145564715, now seen corresponding path program 1 times [2023-08-30 11:27:46,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:46,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362823393] [2023-08-30 11:27:46,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:46,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:46,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:46,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362823393] [2023-08-30 11:27:46,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362823393] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:46,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431449778] [2023-08-30 11:27:46,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:46,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:46,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:46,982 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:27:47,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 11:27:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:47,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 11:27:47,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:47,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:27:47,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:47,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:27:47,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:47,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:27:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:47,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:47,252 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_243 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_243) c_~A~0.base) c_~A~0.offset) 4294967296)) is different from false [2023-08-30 11:27:47,301 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:47,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2023-08-30 11:27:47,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:47,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 117 [2023-08-30 11:27:47,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-08-30 11:27:47,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-08-30 11:27:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:47,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431449778] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:47,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:47,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-30 11:27:47,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005061919] [2023-08-30 11:27:47,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:47,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 11:27:47,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:47,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 11:27:47,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=161, Unknown=6, NotChecked=26, Total=240 [2023-08-30 11:27:47,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:27:47,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 469 flow. Second operand has 16 states, 16 states have (on average 78.25) internal successors, (1252), 16 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:47,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:47,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:27:47,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:48,164 INFO L130 PetriNetUnfolder]: 2487/4149 cut-off events. [2023-08-30 11:27:48,165 INFO L131 PetriNetUnfolder]: For 11270/11270 co-relation queries the response was YES. [2023-08-30 11:27:48,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15086 conditions, 4149 events. 2487/4149 cut-off events. For 11270/11270 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 29956 event pairs, 659 based on Foata normal form. 98/2751 useless extension candidates. Maximal degree in co-relation 15061. Up to 1598 conditions per place. [2023-08-30 11:27:48,190 INFO L137 encePairwiseOnDemand]: 236/247 looper letters, 77 selfloop transitions, 24 changer transitions 1/103 dead transitions. [2023-08-30 11:27:48,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 103 transitions, 868 flow [2023-08-30 11:27:48,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:27:48,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:27:48,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 612 transitions. [2023-08-30 11:27:48,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3539618276460382 [2023-08-30 11:27:48,193 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 612 transitions. [2023-08-30 11:27:48,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 612 transitions. [2023-08-30 11:27:48,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:48,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 612 transitions. [2023-08-30 11:27:48,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.42857142857143) internal successors, (612), 7 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:48,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:48,197 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:48,197 INFO L175 Difference]: Start difference. First operand has 72 places, 60 transitions, 469 flow. Second operand 7 states and 612 transitions. [2023-08-30 11:27:48,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 103 transitions, 868 flow [2023-08-30 11:27:48,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 103 transitions, 857 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 11:27:48,220 INFO L231 Difference]: Finished difference. Result has 77 places, 63 transitions, 578 flow [2023-08-30 11:27:48,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=578, PETRI_PLACES=77, PETRI_TRANSITIONS=63} [2023-08-30 11:27:48,221 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 40 predicate places. [2023-08-30 11:27:48,221 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 63 transitions, 578 flow [2023-08-30 11:27:48,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 78.25) internal successors, (1252), 16 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:48,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:48,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:48,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 11:27:48,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:48,427 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:48,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:48,427 INFO L85 PathProgramCache]: Analyzing trace with hash -2101168166, now seen corresponding path program 1 times [2023-08-30 11:27:48,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:48,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669913967] [2023-08-30 11:27:48,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:48,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:48,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:48,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669913967] [2023-08-30 11:27:48,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669913967] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:27:48,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:27:48,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 11:27:48,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068014920] [2023-08-30 11:27:48,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:27:48,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 11:27:48,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:48,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 11:27:48,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 11:27:48,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 247 [2023-08-30 11:27:48,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 63 transitions, 578 flow. Second operand has 5 states, 5 states have (on average 98.4) internal successors, (492), 5 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:48,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:48,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 247 [2023-08-30 11:27:48,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:48,975 INFO L130 PetriNetUnfolder]: 1836/3387 cut-off events. [2023-08-30 11:27:48,975 INFO L131 PetriNetUnfolder]: For 15588/15938 co-relation queries the response was YES. [2023-08-30 11:27:48,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13532 conditions, 3387 events. 1836/3387 cut-off events. For 15588/15938 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 24929 event pairs, 1412 based on Foata normal form. 332/2683 useless extension candidates. Maximal degree in co-relation 13504. Up to 3334 conditions per place. [2023-08-30 11:27:48,994 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 53 selfloop transitions, 2 changer transitions 15/74 dead transitions. [2023-08-30 11:27:48,994 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 74 transitions, 745 flow [2023-08-30 11:27:48,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:27:48,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:27:48,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 530 transitions. [2023-08-30 11:27:48,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4291497975708502 [2023-08-30 11:27:48,996 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 530 transitions. [2023-08-30 11:27:48,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 530 transitions. [2023-08-30 11:27:48,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:48,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 530 transitions. [2023-08-30 11:27:48,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.0) internal successors, (530), 5 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:48,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:49,000 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:49,000 INFO L175 Difference]: Start difference. First operand has 77 places, 63 transitions, 578 flow. Second operand 5 states and 530 transitions. [2023-08-30 11:27:49,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 74 transitions, 745 flow [2023-08-30 11:27:49,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 726 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 11:27:49,013 INFO L231 Difference]: Finished difference. Result has 79 places, 59 transitions, 552 flow [2023-08-30 11:27:49,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=552, PETRI_PLACES=79, PETRI_TRANSITIONS=59} [2023-08-30 11:27:49,014 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 42 predicate places. [2023-08-30 11:27:49,014 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 59 transitions, 552 flow [2023-08-30 11:27:49,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.4) internal successors, (492), 5 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:49,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:49,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:49,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 11:27:49,015 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:49,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:49,015 INFO L85 PathProgramCache]: Analyzing trace with hash -2145564716, now seen corresponding path program 1 times [2023-08-30 11:27:49,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:49,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395649421] [2023-08-30 11:27:49,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:49,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:49,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:49,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395649421] [2023-08-30 11:27:49,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395649421] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:49,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626190789] [2023-08-30 11:27:49,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:49,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:49,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:49,237 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:27:49,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 11:27:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:49,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 11:27:49,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:49,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:27:49,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:49,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:27:49,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:49,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:27:49,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:49,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:49,493 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_290 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) 9223372039002259456))) is different from false [2023-08-30 11:27:49,498 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_290 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) c_~A~0.base) c_~A~0.offset) 9223372039002259456))) is different from false [2023-08-30 11:27:49,534 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:49,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 11:27:49,542 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:49,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 69 [2023-08-30 11:27:49,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2023-08-30 11:27:49,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-08-30 11:27:49,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:49,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626190789] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:49,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:49,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-30 11:27:49,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672444996] [2023-08-30 11:27:49,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:49,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 11:27:49,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:49,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 11:27:49,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=139, Unknown=6, NotChecked=50, Total=240 [2023-08-30 11:27:49,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:27:49,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 59 transitions, 552 flow. Second operand has 16 states, 16 states have (on average 78.25) internal successors, (1252), 16 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:49,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:49,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:27:49,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:50,203 INFO L130 PetriNetUnfolder]: 2216/3683 cut-off events. [2023-08-30 11:27:50,204 INFO L131 PetriNetUnfolder]: For 12528/12528 co-relation queries the response was YES. [2023-08-30 11:27:50,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15125 conditions, 3683 events. 2216/3683 cut-off events. For 12528/12528 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 26226 event pairs, 531 based on Foata normal form. 98/2666 useless extension candidates. Maximal degree in co-relation 15095. Up to 1490 conditions per place. [2023-08-30 11:27:50,218 INFO L137 encePairwiseOnDemand]: 236/247 looper letters, 59 selfloop transitions, 24 changer transitions 0/84 dead transitions. [2023-08-30 11:27:50,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 84 transitions, 839 flow [2023-08-30 11:27:50,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:27:50,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:27:50,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 595 transitions. [2023-08-30 11:27:50,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3441295546558704 [2023-08-30 11:27:50,220 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 595 transitions. [2023-08-30 11:27:50,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 595 transitions. [2023-08-30 11:27:50,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:50,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 595 transitions. [2023-08-30 11:27:50,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 85.0) internal successors, (595), 7 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:50,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:50,225 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:50,225 INFO L175 Difference]: Start difference. First operand has 79 places, 59 transitions, 552 flow. Second operand 7 states and 595 transitions. [2023-08-30 11:27:50,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 84 transitions, 839 flow [2023-08-30 11:27:50,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 84 transitions, 787 flow, removed 23 selfloop flow, removed 6 redundant places. [2023-08-30 11:27:50,255 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 558 flow [2023-08-30 11:27:50,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=558, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2023-08-30 11:27:50,256 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 36 predicate places. [2023-08-30 11:27:50,256 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 558 flow [2023-08-30 11:27:50,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 78.25) internal successors, (1252), 16 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:50,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:50,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:50,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 11:27:50,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:50,462 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:50,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:50,462 INFO L85 PathProgramCache]: Analyzing trace with hash -2084064891, now seen corresponding path program 1 times [2023-08-30 11:27:50,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:50,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140855253] [2023-08-30 11:27:50,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:50,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:50,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:50,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140855253] [2023-08-30 11:27:50,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140855253] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:50,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552872459] [2023-08-30 11:27:50,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:50,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:50,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:50,655 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:27:50,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 11:27:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:50,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 11:27:50,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:50,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:27:50,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:50,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:27:50,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:50,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:27:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:50,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:50,949 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:50,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 11:27:50,956 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:50,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 69 [2023-08-30 11:27:50,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2023-08-30 11:27:50,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2023-08-30 11:27:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:51,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552872459] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:51,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:51,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-30 11:27:51,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7105353] [2023-08-30 11:27:51,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:51,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 11:27:51,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:51,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 11:27:51,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=188, Unknown=3, NotChecked=0, Total=240 [2023-08-30 11:27:51,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 247 [2023-08-30 11:27:51,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 558 flow. Second operand has 16 states, 16 states have (on average 87.4375) internal successors, (1399), 16 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:51,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:51,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 247 [2023-08-30 11:27:51,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:51,847 INFO L130 PetriNetUnfolder]: 2065/3918 cut-off events. [2023-08-30 11:27:51,847 INFO L131 PetriNetUnfolder]: For 18619/19041 co-relation queries the response was YES. [2023-08-30 11:27:51,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15559 conditions, 3918 events. 2065/3918 cut-off events. For 18619/19041 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 31414 event pairs, 478 based on Foata normal form. 530/3202 useless extension candidates. Maximal degree in co-relation 15533. Up to 1440 conditions per place. [2023-08-30 11:27:51,864 INFO L137 encePairwiseOnDemand]: 236/247 looper letters, 77 selfloop transitions, 12 changer transitions 0/93 dead transitions. [2023-08-30 11:27:51,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 93 transitions, 1070 flow [2023-08-30 11:27:51,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:27:51,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:27:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 659 transitions. [2023-08-30 11:27:51,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38114517061885483 [2023-08-30 11:27:51,866 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 659 transitions. [2023-08-30 11:27:51,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 659 transitions. [2023-08-30 11:27:51,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:51,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 659 transitions. [2023-08-30 11:27:51,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 94.14285714285714) internal successors, (659), 7 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:51,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:51,871 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:51,871 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 558 flow. Second operand 7 states and 659 transitions. [2023-08-30 11:27:51,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 93 transitions, 1070 flow [2023-08-30 11:27:51,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 93 transitions, 1030 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-30 11:27:51,888 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 577 flow [2023-08-30 11:27:51,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=577, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-08-30 11:27:51,889 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 39 predicate places. [2023-08-30 11:27:51,889 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 577 flow [2023-08-30 11:27:51,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 87.4375) internal successors, (1399), 16 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:51,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:51,890 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:51,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 11:27:52,091 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,SelfDestructingSolverStorable13 [2023-08-30 11:27:52,092 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:52,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:52,092 INFO L85 PathProgramCache]: Analyzing trace with hash -2128461162, now seen corresponding path program 1 times [2023-08-30 11:27:52,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:52,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981608249] [2023-08-30 11:27:52,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:52,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:52,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:52,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:52,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981608249] [2023-08-30 11:27:52,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981608249] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:52,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793312341] [2023-08-30 11:27:52,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:52,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:52,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:52,372 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:27:52,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 11:27:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:52,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 11:27:52,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:52,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:27:52,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:52,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:27:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:52,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:52,664 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:52,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-08-30 11:27:52,670 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:52,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2023-08-30 11:27:52,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-08-30 11:27:52,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:52,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793312341] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:52,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:52,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-30 11:27:52,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812439471] [2023-08-30 11:27:52,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:52,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 11:27:52,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:52,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 11:27:52,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=253, Unknown=2, NotChecked=0, Total=306 [2023-08-30 11:27:53,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 247 [2023-08-30 11:27:53,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 577 flow. Second operand has 18 states, 18 states have (on average 93.22222222222223) internal successors, (1678), 18 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:53,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:53,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 247 [2023-08-30 11:27:53,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:53,801 INFO L130 PetriNetUnfolder]: 2073/3927 cut-off events. [2023-08-30 11:27:53,801 INFO L131 PetriNetUnfolder]: For 14814/15242 co-relation queries the response was YES. [2023-08-30 11:27:53,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17854 conditions, 3927 events. 2073/3927 cut-off events. For 14814/15242 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 31698 event pairs, 1006 based on Foata normal form. 434/3741 useless extension candidates. Maximal degree in co-relation 17827. Up to 2173 conditions per place. [2023-08-30 11:27:53,815 INFO L137 encePairwiseOnDemand]: 235/247 looper letters, 84 selfloop transitions, 29 changer transitions 0/114 dead transitions. [2023-08-30 11:27:53,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 114 transitions, 1143 flow [2023-08-30 11:27:53,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 11:27:53,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 11:27:53,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1099 transitions. [2023-08-30 11:27:53,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40449024659550975 [2023-08-30 11:27:53,819 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1099 transitions. [2023-08-30 11:27:53,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1099 transitions. [2023-08-30 11:27:53,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:53,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1099 transitions. [2023-08-30 11:27:53,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 99.9090909090909) internal successors, (1099), 11 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:53,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 247.0) internal successors, (2964), 12 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:53,826 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 247.0) internal successors, (2964), 12 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:53,826 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 577 flow. Second operand 11 states and 1099 transitions. [2023-08-30 11:27:53,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 114 transitions, 1143 flow [2023-08-30 11:27:53,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 114 transitions, 1137 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 11:27:53,842 INFO L231 Difference]: Finished difference. Result has 86 places, 71 transitions, 772 flow [2023-08-30 11:27:53,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=772, PETRI_PLACES=86, PETRI_TRANSITIONS=71} [2023-08-30 11:27:53,842 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 49 predicate places. [2023-08-30 11:27:53,842 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 71 transitions, 772 flow [2023-08-30 11:27:53,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 93.22222222222223) internal successors, (1678), 18 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:53,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:53,843 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:53,849 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 11:27:54,048 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,SelfDestructingSolverStorable14 [2023-08-30 11:27:54,048 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:54,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:54,049 INFO L85 PathProgramCache]: Analyzing trace with hash -2128461161, now seen corresponding path program 1 times [2023-08-30 11:27:54,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:54,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406937620] [2023-08-30 11:27:54,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:54,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:54,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:54,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406937620] [2023-08-30 11:27:54,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406937620] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:54,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78417787] [2023-08-30 11:27:54,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:54,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:54,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:54,339 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:27:54,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 11:27:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:54,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 11:27:54,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:54,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 11:27:54,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:54,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:27:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:54,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:54,596 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_390 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_390) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-30 11:27:54,604 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:54,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-08-30 11:27:54,610 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:54,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2023-08-30 11:27:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-30 11:27:54,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78417787] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:54,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:54,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 11:27:54,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101272724] [2023-08-30 11:27:54,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:54,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 11:27:54,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:54,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 11:27:54,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=289, Unknown=1, NotChecked=34, Total=380 [2023-08-30 11:27:54,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 11:27:54,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 71 transitions, 772 flow. Second operand has 20 states, 20 states have (on average 81.2) internal successors, (1624), 20 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:54,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:54,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 11:27:54,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:55,609 INFO L130 PetriNetUnfolder]: 2070/3932 cut-off events. [2023-08-30 11:27:55,609 INFO L131 PetriNetUnfolder]: For 17983/18369 co-relation queries the response was YES. [2023-08-30 11:27:55,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18611 conditions, 3932 events. 2070/3932 cut-off events. For 17983/18369 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 31561 event pairs, 759 based on Foata normal form. 389/3700 useless extension candidates. Maximal degree in co-relation 18581. Up to 2170 conditions per place. [2023-08-30 11:27:55,628 INFO L137 encePairwiseOnDemand]: 235/247 looper letters, 83 selfloop transitions, 29 changer transitions 0/113 dead transitions. [2023-08-30 11:27:55,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 113 transitions, 1213 flow [2023-08-30 11:27:55,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 11:27:55,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 11:27:55,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1045 transitions. [2023-08-30 11:27:55,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3525641025641026 [2023-08-30 11:27:55,631 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1045 transitions. [2023-08-30 11:27:55,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1045 transitions. [2023-08-30 11:27:55,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:55,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1045 transitions. [2023-08-30 11:27:55,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 87.08333333333333) internal successors, (1045), 12 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:55,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:55,639 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:55,639 INFO L175 Difference]: Start difference. First operand has 86 places, 71 transitions, 772 flow. Second operand 12 states and 1045 transitions. [2023-08-30 11:27:55,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 113 transitions, 1213 flow [2023-08-30 11:27:55,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 113 transitions, 1197 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 11:27:55,660 INFO L231 Difference]: Finished difference. Result has 94 places, 70 transitions, 800 flow [2023-08-30 11:27:55,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=800, PETRI_PLACES=94, PETRI_TRANSITIONS=70} [2023-08-30 11:27:55,661 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 57 predicate places. [2023-08-30 11:27:55,661 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 70 transitions, 800 flow [2023-08-30 11:27:55,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 81.2) internal successors, (1624), 20 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:55,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:55,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:55,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 11:27:55,864 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,SelfDestructingSolverStorable15 [2023-08-30 11:27:55,865 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:55,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:55,865 INFO L85 PathProgramCache]: Analyzing trace with hash -2084064892, now seen corresponding path program 1 times [2023-08-30 11:27:55,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:55,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605683786] [2023-08-30 11:27:55,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:55,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:56,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:56,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:56,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605683786] [2023-08-30 11:27:56,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605683786] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:56,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551960629] [2023-08-30 11:27:56,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:56,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:56,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:56,033 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:27:56,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 11:27:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:56,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 11:27:56,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:56,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:27:56,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:56,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:27:56,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:56,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:27:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:56,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:56,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:56,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2023-08-30 11:27:56,318 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:56,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 117 [2023-08-30 11:27:56,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-08-30 11:27:56,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-08-30 11:27:56,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:56,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551960629] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:56,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:56,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-30 11:27:56,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617511969] [2023-08-30 11:27:56,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:56,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 11:27:56,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:56,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 11:27:56,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=160, Unknown=6, NotChecked=0, Total=210 [2023-08-30 11:27:56,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:27:56,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 70 transitions, 800 flow. Second operand has 15 states, 15 states have (on average 78.4) internal successors, (1176), 15 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:56,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:56,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:27:56,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:56,931 INFO L130 PetriNetUnfolder]: 1990/3815 cut-off events. [2023-08-30 11:27:56,931 INFO L131 PetriNetUnfolder]: For 16800/16800 co-relation queries the response was YES. [2023-08-30 11:27:56,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18702 conditions, 3815 events. 1990/3815 cut-off events. For 16800/16800 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 29617 event pairs, 488 based on Foata normal form. 128/3326 useless extension candidates. Maximal degree in co-relation 18672. Up to 1491 conditions per place. [2023-08-30 11:27:56,951 INFO L137 encePairwiseOnDemand]: 236/247 looper letters, 88 selfloop transitions, 12 changer transitions 0/104 dead transitions. [2023-08-30 11:27:56,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 104 transitions, 1406 flow [2023-08-30 11:27:56,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:27:56,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:27:56,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 593 transitions. [2023-08-30 11:27:56,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34297281665702717 [2023-08-30 11:27:56,953 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 593 transitions. [2023-08-30 11:27:56,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 593 transitions. [2023-08-30 11:27:56,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:56,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 593 transitions. [2023-08-30 11:27:56,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 84.71428571428571) internal successors, (593), 7 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:56,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:56,957 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:56,957 INFO L175 Difference]: Start difference. First operand has 94 places, 70 transitions, 800 flow. Second operand 7 states and 593 transitions. [2023-08-30 11:27:56,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 104 transitions, 1406 flow [2023-08-30 11:27:56,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 104 transitions, 1389 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 11:27:56,987 INFO L231 Difference]: Finished difference. Result has 95 places, 69 transitions, 805 flow [2023-08-30 11:27:56,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=805, PETRI_PLACES=95, PETRI_TRANSITIONS=69} [2023-08-30 11:27:56,988 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 58 predicate places. [2023-08-30 11:27:56,988 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 69 transitions, 805 flow [2023-08-30 11:27:56,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 78.4) internal successors, (1176), 15 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:56,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:56,989 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:56,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 11:27:57,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 11:27:57,194 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:57,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:57,194 INFO L85 PathProgramCache]: Analyzing trace with hash -2128461159, now seen corresponding path program 1 times [2023-08-30 11:27:57,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:57,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245593320] [2023-08-30 11:27:57,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:57,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:27:57,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:57,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245593320] [2023-08-30 11:27:57,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245593320] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:27:57,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:27:57,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:27:57,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200563244] [2023-08-30 11:27:57,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:27:57,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:27:57,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:57,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:27:57,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:27:57,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 247 [2023-08-30 11:27:57,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 69 transitions, 805 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:57,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:57,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 247 [2023-08-30 11:27:57,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:57,557 INFO L130 PetriNetUnfolder]: 1378/2683 cut-off events. [2023-08-30 11:27:57,558 INFO L131 PetriNetUnfolder]: For 16763/17104 co-relation queries the response was YES. [2023-08-30 11:27:57,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13373 conditions, 2683 events. 1378/2683 cut-off events. For 16763/17104 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 19906 event pairs, 1094 based on Foata normal form. 341/2831 useless extension candidates. Maximal degree in co-relation 13342. Up to 2635 conditions per place. [2023-08-30 11:27:57,568 INFO L137 encePairwiseOnDemand]: 244/247 looper letters, 56 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-08-30 11:27:57,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 62 transitions, 809 flow [2023-08-30 11:27:57,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:27:57,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:27:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 340 transitions. [2023-08-30 11:27:57,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45883940620782726 [2023-08-30 11:27:57,569 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 340 transitions. [2023-08-30 11:27:57,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 340 transitions. [2023-08-30 11:27:57,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:57,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 340 transitions. [2023-08-30 11:27:57,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:57,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:57,571 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:57,571 INFO L175 Difference]: Start difference. First operand has 95 places, 69 transitions, 805 flow. Second operand 3 states and 340 transitions. [2023-08-30 11:27:57,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 62 transitions, 809 flow [2023-08-30 11:27:57,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 62 transitions, 800 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 11:27:57,587 INFO L231 Difference]: Finished difference. Result has 91 places, 62 transitions, 688 flow [2023-08-30 11:27:57,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=688, PETRI_PLACES=91, PETRI_TRANSITIONS=62} [2023-08-30 11:27:57,587 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 54 predicate places. [2023-08-30 11:27:57,587 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 62 transitions, 688 flow [2023-08-30 11:27:57,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:57,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:57,588 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:57,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 11:27:57,588 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:57,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:57,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2128461158, now seen corresponding path program 2 times [2023-08-30 11:27:57,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:57,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250719722] [2023-08-30 11:27:57,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:57,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:57,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:27:57,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:57,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250719722] [2023-08-30 11:27:57,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250719722] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:27:57,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:27:57,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:27:57,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437446852] [2023-08-30 11:27:57,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:27:57,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:27:57,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:57,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:27:57,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:27:57,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 247 [2023-08-30 11:27:57,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 62 transitions, 688 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:57,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:57,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 247 [2023-08-30 11:27:57,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:57,863 INFO L130 PetriNetUnfolder]: 976/1916 cut-off events. [2023-08-30 11:27:57,863 INFO L131 PetriNetUnfolder]: For 13930/14226 co-relation queries the response was YES. [2023-08-30 11:27:57,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9070 conditions, 1916 events. 976/1916 cut-off events. For 13930/14226 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 13194 event pairs, 735 based on Foata normal form. 470/2330 useless extension candidates. Maximal degree in co-relation 9039. Up to 1871 conditions per place. [2023-08-30 11:27:57,873 INFO L137 encePairwiseOnDemand]: 244/247 looper letters, 47 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-08-30 11:27:57,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 53 transitions, 654 flow [2023-08-30 11:27:57,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:27:57,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:27:57,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2023-08-30 11:27:57,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45614035087719296 [2023-08-30 11:27:57,874 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2023-08-30 11:27:57,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2023-08-30 11:27:57,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:57,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2023-08-30 11:27:57,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:57,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:57,876 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:57,876 INFO L175 Difference]: Start difference. First operand has 91 places, 62 transitions, 688 flow. Second operand 3 states and 338 transitions. [2023-08-30 11:27:57,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 53 transitions, 654 flow [2023-08-30 11:27:57,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 53 transitions, 573 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-08-30 11:27:57,886 INFO L231 Difference]: Finished difference. Result has 81 places, 53 transitions, 479 flow [2023-08-30 11:27:57,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=479, PETRI_PLACES=81, PETRI_TRANSITIONS=53} [2023-08-30 11:27:57,887 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 44 predicate places. [2023-08-30 11:27:57,887 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 53 transitions, 479 flow [2023-08-30 11:27:57,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:57,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:57,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:57,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 11:27:57,887 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:57,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:57,888 INFO L85 PathProgramCache]: Analyzing trace with hash -181499753, now seen corresponding path program 1 times [2023-08-30 11:27:57,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:57,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769313986] [2023-08-30 11:27:57,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:57,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:57,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:57,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769313986] [2023-08-30 11:27:57,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769313986] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:57,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683944624] [2023-08-30 11:27:57,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:57,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:57,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:57,957 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:27:57,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 11:27:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:58,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 11:27:58,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:58,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:58,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:58,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:58,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683944624] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:58,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:58,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-30 11:27:58,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364114743] [2023-08-30 11:27:58,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:58,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 11:27:58,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:58,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 11:27:58,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-30 11:27:58,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 11:27:58,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 53 transitions, 479 flow. Second operand has 14 states, 14 states have (on average 95.42857142857143) internal successors, (1336), 14 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:58,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:58,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 11:27:58,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:27:58,703 INFO L130 PetriNetUnfolder]: 1031/2002 cut-off events. [2023-08-30 11:27:58,703 INFO L131 PetriNetUnfolder]: For 6355/6355 co-relation queries the response was YES. [2023-08-30 11:27:58,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8785 conditions, 2002 events. 1031/2002 cut-off events. For 6355/6355 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 13063 event pairs, 570 based on Foata normal form. 56/1998 useless extension candidates. Maximal degree in co-relation 8758. Up to 1460 conditions per place. [2023-08-30 11:27:58,715 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 45 selfloop transitions, 4 changer transitions 40/91 dead transitions. [2023-08-30 11:27:58,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 91 transitions, 871 flow [2023-08-30 11:27:58,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 11:27:58,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 11:27:58,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 911 transitions. [2023-08-30 11:27:58,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4098065677013045 [2023-08-30 11:27:58,718 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 911 transitions. [2023-08-30 11:27:58,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 911 transitions. [2023-08-30 11:27:58,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:27:58,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 911 transitions. [2023-08-30 11:27:58,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 101.22222222222223) internal successors, (911), 9 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:58,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 247.0) internal successors, (2470), 10 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:58,722 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 247.0) internal successors, (2470), 10 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:58,722 INFO L175 Difference]: Start difference. First operand has 81 places, 53 transitions, 479 flow. Second operand 9 states and 911 transitions. [2023-08-30 11:27:58,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 91 transitions, 871 flow [2023-08-30 11:27:58,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 91 transitions, 870 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:27:58,734 INFO L231 Difference]: Finished difference. Result has 91 places, 43 transitions, 401 flow [2023-08-30 11:27:58,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=401, PETRI_PLACES=91, PETRI_TRANSITIONS=43} [2023-08-30 11:27:58,735 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 54 predicate places. [2023-08-30 11:27:58,735 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 43 transitions, 401 flow [2023-08-30 11:27:58,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 95.42857142857143) internal successors, (1336), 14 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:58,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:27:58,735 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:27:58,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 11:27:58,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:58,941 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:27:58,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:27:58,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1557784518, now seen corresponding path program 1 times [2023-08-30 11:27:58,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:27:58,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401237212] [2023-08-30 11:27:58,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:58,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:27:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:59,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:27:59,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401237212] [2023-08-30 11:27:59,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401237212] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:27:59,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651159790] [2023-08-30 11:27:59,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:27:59,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:27:59,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:27:59,249 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:27:59,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 11:27:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:27:59,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 11:27:59,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:27:59,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:27:59,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:59,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:27:59,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:27:59,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:27:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:27:59,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:27:59,596 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_522 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_522) c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 4)) 9223372039002259456))) is different from false [2023-08-30 11:27:59,603 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_522 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_522) c_~A~0.base) (+ c_~A~0.offset 4)) 9223372039002259456))) is different from false [2023-08-30 11:27:59,643 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:59,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 11:27:59,649 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:27:59,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 75 [2023-08-30 11:27:59,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2023-08-30 11:27:59,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-08-30 11:27:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 11:27:59,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651159790] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:27:59,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:27:59,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-30 11:27:59,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214260101] [2023-08-30 11:27:59,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:27:59,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 11:27:59,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:27:59,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 11:27:59,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=348, Unknown=10, NotChecked=78, Total=506 [2023-08-30 11:27:59,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:27:59,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 43 transitions, 401 flow. Second operand has 23 states, 23 states have (on average 78.17391304347827) internal successors, (1798), 23 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:27:59,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:27:59,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:27:59,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:00,317 INFO L130 PetriNetUnfolder]: 1177/2208 cut-off events. [2023-08-30 11:28:00,318 INFO L131 PetriNetUnfolder]: For 14661/15000 co-relation queries the response was YES. [2023-08-30 11:28:00,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10636 conditions, 2208 events. 1177/2208 cut-off events. For 14661/15000 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 15199 event pairs, 648 based on Foata normal form. 441/2577 useless extension candidates. Maximal degree in co-relation 10605. Up to 705 conditions per place. [2023-08-30 11:28:00,327 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 69 selfloop transitions, 17 changer transitions 0/87 dead transitions. [2023-08-30 11:28:00,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 87 transitions, 892 flow [2023-08-30 11:28:00,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 11:28:00,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 11:28:00,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 842 transitions. [2023-08-30 11:28:00,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3408906882591093 [2023-08-30 11:28:00,329 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 842 transitions. [2023-08-30 11:28:00,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 842 transitions. [2023-08-30 11:28:00,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:00,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 842 transitions. [2023-08-30 11:28:00,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.2) internal successors, (842), 10 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:00,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 247.0) internal successors, (2717), 11 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:00,333 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 247.0) internal successors, (2717), 11 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:00,333 INFO L175 Difference]: Start difference. First operand has 91 places, 43 transitions, 401 flow. Second operand 10 states and 842 transitions. [2023-08-30 11:28:00,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 87 transitions, 892 flow [2023-08-30 11:28:00,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 87 transitions, 740 flow, removed 55 selfloop flow, removed 15 redundant places. [2023-08-30 11:28:00,357 INFO L231 Difference]: Finished difference. Result has 79 places, 45 transitions, 396 flow [2023-08-30 11:28:00,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=396, PETRI_PLACES=79, PETRI_TRANSITIONS=45} [2023-08-30 11:28:00,357 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 42 predicate places. [2023-08-30 11:28:00,357 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 45 transitions, 396 flow [2023-08-30 11:28:00,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 78.17391304347827) internal successors, (1798), 23 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:00,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:00,358 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:00,363 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 11:28:00,563 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,SelfDestructingSolverStorable20 [2023-08-30 11:28:00,563 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:00,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:00,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1557784517, now seen corresponding path program 1 times [2023-08-30 11:28:00,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:00,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503364517] [2023-08-30 11:28:00,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:00,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:00,905 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 11:28:00,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:00,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503364517] [2023-08-30 11:28:00,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503364517] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:00,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248717319] [2023-08-30 11:28:00,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:00,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:00,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:00,907 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 11:28:00,937 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 11:28:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:01,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 11:28:01,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:01,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:28:01,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:01,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:28:01,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:01,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:28:01,215 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 11:28:01,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:01,236 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_560 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_560) c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) 4294967296)) is different from false [2023-08-30 11:28:01,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:01,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 11:28:01,330 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:01,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 129 [2023-08-30 11:28:01,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 11:28:01,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-30 11:28:01,405 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 11:28:01,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248717319] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:01,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:01,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-30 11:28:01,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028132078] [2023-08-30 11:28:01,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:01,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 11:28:01,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:01,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 11:28:01,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=382, Unknown=9, NotChecked=40, Total=506 [2023-08-30 11:28:01,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:28:01,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 45 transitions, 396 flow. Second operand has 23 states, 23 states have (on average 78.17391304347827) internal successors, (1798), 23 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:01,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:01,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:28:01,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:02,003 INFO L130 PetriNetUnfolder]: 1102/2070 cut-off events. [2023-08-30 11:28:02,003 INFO L131 PetriNetUnfolder]: For 8313/8694 co-relation queries the response was YES. [2023-08-30 11:28:02,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9341 conditions, 2070 events. 1102/2070 cut-off events. For 8313/8694 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 14105 event pairs, 465 based on Foata normal form. 432/2448 useless extension candidates. Maximal degree in co-relation 9316. Up to 705 conditions per place. [2023-08-30 11:28:02,010 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 68 selfloop transitions, 17 changer transitions 0/86 dead transitions. [2023-08-30 11:28:02,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 86 transitions, 783 flow [2023-08-30 11:28:02,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 11:28:02,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 11:28:02,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 839 transitions. [2023-08-30 11:28:02,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3396761133603239 [2023-08-30 11:28:02,014 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 839 transitions. [2023-08-30 11:28:02,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 839 transitions. [2023-08-30 11:28:02,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:02,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 839 transitions. [2023-08-30 11:28:02,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 83.9) internal successors, (839), 10 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:02,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 247.0) internal successors, (2717), 11 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:02,018 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 247.0) internal successors, (2717), 11 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:02,018 INFO L175 Difference]: Start difference. First operand has 79 places, 45 transitions, 396 flow. Second operand 10 states and 839 transitions. [2023-08-30 11:28:02,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 86 transitions, 783 flow [2023-08-30 11:28:02,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 86 transitions, 746 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-08-30 11:28:02,024 INFO L231 Difference]: Finished difference. Result has 81 places, 44 transitions, 382 flow [2023-08-30 11:28:02,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=382, PETRI_PLACES=81, PETRI_TRANSITIONS=44} [2023-08-30 11:28:02,025 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 44 predicate places. [2023-08-30 11:28:02,025 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 44 transitions, 382 flow [2023-08-30 11:28:02,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 78.17391304347827) internal successors, (1798), 23 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:02,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:02,026 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 11:28:02,033 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 11:28:02,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:02,231 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:02,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:02,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1557784211, now seen corresponding path program 1 times [2023-08-30 11:28:02,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:02,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998556915] [2023-08-30 11:28:02,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:02,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:02,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 11:28:02,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:02,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998556915] [2023-08-30 11:28:02,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998556915] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:28:02,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:28:02,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:28:02,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159693377] [2023-08-30 11:28:02,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:28:02,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:28:02,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:02,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:28:02,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:28:02,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 247 [2023-08-30 11:28:02,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 44 transitions, 382 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:02,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:02,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 247 [2023-08-30 11:28:02,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:02,531 INFO L130 PetriNetUnfolder]: 1000/1869 cut-off events. [2023-08-30 11:28:02,531 INFO L131 PetriNetUnfolder]: For 7465/7780 co-relation queries the response was YES. [2023-08-30 11:28:02,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8104 conditions, 1869 events. 1000/1869 cut-off events. For 7465/7780 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 12164 event pairs, 750 based on Foata normal form. 315/2184 useless extension candidates. Maximal degree in co-relation 8080. Up to 1755 conditions per place. [2023-08-30 11:28:02,542 INFO L137 encePairwiseOnDemand]: 245/247 looper letters, 49 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-30 11:28:02,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 52 transitions, 507 flow [2023-08-30 11:28:02,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:28:02,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:28:02,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 343 transitions. [2023-08-30 11:28:02,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46288798920377866 [2023-08-30 11:28:02,544 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 343 transitions. [2023-08-30 11:28:02,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 343 transitions. [2023-08-30 11:28:02,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:02,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 343 transitions. [2023-08-30 11:28:02,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:02,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:02,546 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:02,546 INFO L175 Difference]: Start difference. First operand has 81 places, 44 transitions, 382 flow. Second operand 3 states and 343 transitions. [2023-08-30 11:28:02,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 52 transitions, 507 flow [2023-08-30 11:28:02,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 52 transitions, 480 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 11:28:02,551 INFO L231 Difference]: Finished difference. Result has 75 places, 42 transitions, 322 flow [2023-08-30 11:28:02,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=322, PETRI_PLACES=75, PETRI_TRANSITIONS=42} [2023-08-30 11:28:02,552 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 38 predicate places. [2023-08-30 11:28:02,552 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 42 transitions, 322 flow [2023-08-30 11:28:02,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:02,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:02,552 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 11:28:02,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 11:28:02,552 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:02,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:02,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1557784239, now seen corresponding path program 2 times [2023-08-30 11:28:02,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:02,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718099045] [2023-08-30 11:28:02,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:02,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:02,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:02,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:02,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718099045] [2023-08-30 11:28:02,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718099045] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:02,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275580155] [2023-08-30 11:28:02,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:28:02,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:02,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:02,648 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 11:28:02,651 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 11:28:02,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:28:02,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:02,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 11:28:02,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:02,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:02,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275580155] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:02,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:02,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 11:28:02,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913693475] [2023-08-30 11:28:02,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:02,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 11:28:02,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:02,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 11:28:02,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-08-30 11:28:03,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 11:28:03,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 42 transitions, 322 flow. Second operand has 19 states, 19 states have (on average 95.21052631578948) internal successors, (1809), 19 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:03,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:03,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 11:28:03,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:03,510 INFO L130 PetriNetUnfolder]: 855/1588 cut-off events. [2023-08-30 11:28:03,510 INFO L131 PetriNetUnfolder]: For 5743/6025 co-relation queries the response was YES. [2023-08-30 11:28:03,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6601 conditions, 1588 events. 855/1588 cut-off events. For 5743/6025 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 10224 event pairs, 282 based on Foata normal form. 366/1954 useless extension candidates. Maximal degree in co-relation 6578. Up to 774 conditions per place. [2023-08-30 11:28:03,519 INFO L137 encePairwiseOnDemand]: 237/247 looper letters, 104 selfloop transitions, 15 changer transitions 7/127 dead transitions. [2023-08-30 11:28:03,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 127 transitions, 1056 flow [2023-08-30 11:28:03,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 11:28:03,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 11:28:03,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1233 transitions. [2023-08-30 11:28:03,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159919028340081 [2023-08-30 11:28:03,521 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1233 transitions. [2023-08-30 11:28:03,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1233 transitions. [2023-08-30 11:28:03,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:03,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1233 transitions. [2023-08-30 11:28:03,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 102.75) internal successors, (1233), 12 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:03,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:03,526 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:03,526 INFO L175 Difference]: Start difference. First operand has 75 places, 42 transitions, 322 flow. Second operand 12 states and 1233 transitions. [2023-08-30 11:28:03,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 127 transitions, 1056 flow [2023-08-30 11:28:03,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 127 transitions, 1052 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:28:03,534 INFO L231 Difference]: Finished difference. Result has 92 places, 53 transitions, 511 flow [2023-08-30 11:28:03,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=511, PETRI_PLACES=92, PETRI_TRANSITIONS=53} [2023-08-30 11:28:03,535 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 55 predicate places. [2023-08-30 11:28:03,535 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 53 transitions, 511 flow [2023-08-30 11:28:03,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 95.21052631578948) internal successors, (1809), 19 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:03,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:03,535 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2023-08-30 11:28:03,547 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 11:28:03,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:03,741 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:03,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:03,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1993561149, now seen corresponding path program 2 times [2023-08-30 11:28:03,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:03,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744727232] [2023-08-30 11:28:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:03,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:04,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:04,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744727232] [2023-08-30 11:28:04,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744727232] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:04,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123367218] [2023-08-30 11:28:04,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:28:04,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:04,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:04,028 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 11:28:04,029 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 11:28:04,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:28:04,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:04,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 11:28:04,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:04,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:28:04,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:04,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:28:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:04,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:04,356 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_642 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_642) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-30 11:28:04,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:04,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-08-30 11:28:04,369 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:04,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2023-08-30 11:28:04,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-08-30 11:28:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-30 11:28:04,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123367218] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:04,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:04,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-30 11:28:04,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715043933] [2023-08-30 11:28:04,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:04,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 11:28:04,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:04,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 11:28:04,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=440, Unknown=1, NotChecked=42, Total=552 [2023-08-30 11:28:04,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 11:28:04,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 53 transitions, 511 flow. Second operand has 24 states, 24 states have (on average 81.16666666666667) internal successors, (1948), 24 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:04,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:04,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 11:28:04,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:04,991 INFO L130 PetriNetUnfolder]: 861/1599 cut-off events. [2023-08-30 11:28:04,991 INFO L131 PetriNetUnfolder]: For 9210/9500 co-relation queries the response was YES. [2023-08-30 11:28:04,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7603 conditions, 1599 events. 861/1599 cut-off events. For 9210/9500 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 9805 event pairs, 577 based on Foata normal form. 294/1891 useless extension candidates. Maximal degree in co-relation 7572. Up to 1041 conditions per place. [2023-08-30 11:28:04,998 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 63 selfloop transitions, 21 changer transitions 1/86 dead transitions. [2023-08-30 11:28:04,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 86 transitions, 894 flow [2023-08-30 11:28:04,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 11:28:04,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 11:28:05,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1107 transitions. [2023-08-30 11:28:05,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34475241357832453 [2023-08-30 11:28:05,001 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1107 transitions. [2023-08-30 11:28:05,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1107 transitions. [2023-08-30 11:28:05,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:05,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1107 transitions. [2023-08-30 11:28:05,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 85.15384615384616) internal successors, (1107), 13 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:05,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 247.0) internal successors, (3458), 14 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:05,006 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 247.0) internal successors, (3458), 14 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:05,006 INFO L175 Difference]: Start difference. First operand has 92 places, 53 transitions, 511 flow. Second operand 13 states and 1107 transitions. [2023-08-30 11:28:05,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 86 transitions, 894 flow [2023-08-30 11:28:05,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 86 transitions, 864 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-30 11:28:05,015 INFO L231 Difference]: Finished difference. Result has 104 places, 60 transitions, 613 flow [2023-08-30 11:28:05,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=613, PETRI_PLACES=104, PETRI_TRANSITIONS=60} [2023-08-30 11:28:05,016 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 67 predicate places. [2023-08-30 11:28:05,016 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 60 transitions, 613 flow [2023-08-30 11:28:05,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 81.16666666666667) internal successors, (1948), 24 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:05,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:05,017 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:05,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 11:28:05,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-30 11:28:05,230 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:05,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:05,230 INFO L85 PathProgramCache]: Analyzing trace with hash -925121662, now seen corresponding path program 2 times [2023-08-30 11:28:05,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:05,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598679736] [2023-08-30 11:28:05,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:05,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:05,518 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 11:28:05,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:05,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598679736] [2023-08-30 11:28:05,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598679736] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:05,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822668987] [2023-08-30 11:28:05,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:28:05,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:05,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:05,521 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:28:05,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 11:28:05,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:28:05,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:05,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 11:28:05,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:05,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 11:28:05,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:05,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:28:05,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:05,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:28:05,796 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 11:28:05,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:05,920 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:05,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 11:28:05,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:05,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 129 [2023-08-30 11:28:05,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 11:28:05,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-30 11:28:05,997 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 11:28:05,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822668987] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:05,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:05,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-30 11:28:05,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117265615] [2023-08-30 11:28:05,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:05,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 11:28:06,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:06,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 11:28:06,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=421, Unknown=14, NotChecked=0, Total=506 [2023-08-30 11:28:06,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:28:06,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 60 transitions, 613 flow. Second operand has 23 states, 23 states have (on average 78.30434782608695) internal successors, (1801), 23 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:06,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:06,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:28:06,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:06,850 INFO L130 PetriNetUnfolder]: 1207/2269 cut-off events. [2023-08-30 11:28:06,850 INFO L131 PetriNetUnfolder]: For 11119/11119 co-relation queries the response was YES. [2023-08-30 11:28:06,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10200 conditions, 2269 events. 1207/2269 cut-off events. For 11119/11119 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 14821 event pairs, 298 based on Foata normal form. 232/2501 useless extension candidates. Maximal degree in co-relation 10165. Up to 848 conditions per place. [2023-08-30 11:28:06,863 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 108 selfloop transitions, 12 changer transitions 0/124 dead transitions. [2023-08-30 11:28:06,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 124 transitions, 1429 flow [2023-08-30 11:28:06,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 11:28:06,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 11:28:06,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 833 transitions. [2023-08-30 11:28:06,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.337246963562753 [2023-08-30 11:28:06,865 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 833 transitions. [2023-08-30 11:28:06,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 833 transitions. [2023-08-30 11:28:06,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:06,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 833 transitions. [2023-08-30 11:28:06,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 83.3) internal successors, (833), 10 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:06,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 247.0) internal successors, (2717), 11 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:06,868 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 247.0) internal successors, (2717), 11 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:06,868 INFO L175 Difference]: Start difference. First operand has 104 places, 60 transitions, 613 flow. Second operand 10 states and 833 transitions. [2023-08-30 11:28:06,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 124 transitions, 1429 flow [2023-08-30 11:28:06,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 124 transitions, 1383 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-08-30 11:28:06,882 INFO L231 Difference]: Finished difference. Result has 109 places, 62 transitions, 627 flow [2023-08-30 11:28:06,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=627, PETRI_PLACES=109, PETRI_TRANSITIONS=62} [2023-08-30 11:28:06,882 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 72 predicate places. [2023-08-30 11:28:06,883 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 62 transitions, 627 flow [2023-08-30 11:28:06,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 78.30434782608695) internal successors, (1801), 23 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:06,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:06,883 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2023-08-30 11:28:06,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 11:28:07,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 11:28:07,089 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:07,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:07,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1993561148, now seen corresponding path program 3 times [2023-08-30 11:28:07,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:07,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266625703] [2023-08-30 11:28:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:07,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:07,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:07,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:07,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266625703] [2023-08-30 11:28:07,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266625703] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:07,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350442123] [2023-08-30 11:28:07,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:28:07,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:07,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:07,389 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:28:07,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 11:28:07,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 11:28:07,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:07,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 11:28:07,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:07,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:28:07,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:07,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:28:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:07,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:07,779 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:07,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-08-30 11:28:07,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:07,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2023-08-30 11:28:07,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-08-30 11:28:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:07,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350442123] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:07,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:07,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-30 11:28:07,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942460992] [2023-08-30 11:28:07,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:07,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 11:28:07,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:07,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 11:28:07,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=477, Unknown=4, NotChecked=0, Total=552 [2023-08-30 11:28:08,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 247 [2023-08-30 11:28:08,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 62 transitions, 627 flow. Second operand has 24 states, 24 states have (on average 91.16666666666667) internal successors, (2188), 24 states have internal predecessors, (2188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:08,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:08,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 247 [2023-08-30 11:28:08,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:08,943 INFO L130 PetriNetUnfolder]: 1168/2166 cut-off events. [2023-08-30 11:28:08,943 INFO L131 PetriNetUnfolder]: For 11729/12023 co-relation queries the response was YES. [2023-08-30 11:28:08,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10893 conditions, 2166 events. 1168/2166 cut-off events. For 11729/12023 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 14008 event pairs, 652 based on Foata normal form. 296/2450 useless extension candidates. Maximal degree in co-relation 10857. Up to 1405 conditions per place. [2023-08-30 11:28:08,952 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 68 selfloop transitions, 20 changer transitions 1/90 dead transitions. [2023-08-30 11:28:08,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 90 transitions, 1003 flow [2023-08-30 11:28:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 11:28:08,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 11:28:08,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1235 transitions. [2023-08-30 11:28:08,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2023-08-30 11:28:08,954 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1235 transitions. [2023-08-30 11:28:08,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1235 transitions. [2023-08-30 11:28:08,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:08,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1235 transitions. [2023-08-30 11:28:08,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 95.0) internal successors, (1235), 13 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:08,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 247.0) internal successors, (3458), 14 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:08,959 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 247.0) internal successors, (3458), 14 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:08,959 INFO L175 Difference]: Start difference. First operand has 109 places, 62 transitions, 627 flow. Second operand 13 states and 1235 transitions. [2023-08-30 11:28:08,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 90 transitions, 1003 flow [2023-08-30 11:28:08,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 90 transitions, 974 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-30 11:28:08,972 INFO L231 Difference]: Finished difference. Result has 114 places, 60 transitions, 617 flow [2023-08-30 11:28:08,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=617, PETRI_PLACES=114, PETRI_TRANSITIONS=60} [2023-08-30 11:28:08,973 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 77 predicate places. [2023-08-30 11:28:08,973 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 60 transitions, 617 flow [2023-08-30 11:28:08,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 91.16666666666667) internal successors, (2188), 24 states have internal predecessors, (2188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:08,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:08,974 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:08,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 11:28:09,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 11:28:09,179 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:09,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:09,180 INFO L85 PathProgramCache]: Analyzing trace with hash -925121661, now seen corresponding path program 1 times [2023-08-30 11:28:09,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:09,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164889693] [2023-08-30 11:28:09,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:09,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:09,431 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 11:28:09,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:09,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164889693] [2023-08-30 11:28:09,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164889693] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:09,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567211812] [2023-08-30 11:28:09,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:09,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:09,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:09,433 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:28:09,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 11:28:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:09,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 11:28:09,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:09,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 11:28:09,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:09,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:28:09,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:09,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:28:09,727 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 11:28:09,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:09,776 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_755 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_755) c_~A~0.base) (+ c_~A~0.offset 4)) 4294967296))) is different from false [2023-08-30 11:28:09,815 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:09,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 11:28:09,835 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:09,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 75 [2023-08-30 11:28:09,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2023-08-30 11:28:09,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-08-30 11:28:09,919 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 11:28:09,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567211812] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:09,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:09,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-30 11:28:09,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886281217] [2023-08-30 11:28:09,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:09,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 11:28:09,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:09,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 11:28:09,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=392, Unknown=1, NotChecked=40, Total=506 [2023-08-30 11:28:09,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:28:09,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 60 transitions, 617 flow. Second operand has 23 states, 23 states have (on average 78.30434782608695) internal successors, (1801), 23 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:09,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:09,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:28:09,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:10,514 INFO L130 PetriNetUnfolder]: 1084/2020 cut-off events. [2023-08-30 11:28:10,514 INFO L131 PetriNetUnfolder]: For 12736/12888 co-relation queries the response was YES. [2023-08-30 11:28:10,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10197 conditions, 2020 events. 1084/2020 cut-off events. For 12736/12888 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 12897 event pairs, 294 based on Foata normal form. 232/2244 useless extension candidates. Maximal degree in co-relation 10162. Up to 818 conditions per place. [2023-08-30 11:28:10,524 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 90 selfloop transitions, 12 changer transitions 0/106 dead transitions. [2023-08-30 11:28:10,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 106 transitions, 1244 flow [2023-08-30 11:28:10,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 11:28:10,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 11:28:10,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 745 transitions. [2023-08-30 11:28:10,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3351327035537562 [2023-08-30 11:28:10,527 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 745 transitions. [2023-08-30 11:28:10,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 745 transitions. [2023-08-30 11:28:10,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:10,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 745 transitions. [2023-08-30 11:28:10,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 82.77777777777777) internal successors, (745), 9 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:10,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 247.0) internal successors, (2470), 10 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:10,531 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 247.0) internal successors, (2470), 10 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:10,531 INFO L175 Difference]: Start difference. First operand has 114 places, 60 transitions, 617 flow. Second operand 9 states and 745 transitions. [2023-08-30 11:28:10,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 106 transitions, 1244 flow [2023-08-30 11:28:10,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 106 transitions, 1185 flow, removed 1 selfloop flow, removed 12 redundant places. [2023-08-30 11:28:10,585 INFO L231 Difference]: Finished difference. Result has 110 places, 59 transitions, 580 flow [2023-08-30 11:28:10,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=580, PETRI_PLACES=110, PETRI_TRANSITIONS=59} [2023-08-30 11:28:10,586 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 73 predicate places. [2023-08-30 11:28:10,586 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 59 transitions, 580 flow [2023-08-30 11:28:10,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 78.30434782608695) internal successors, (1801), 23 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:10,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:10,587 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:10,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 11:28:10,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:10,793 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:10,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:10,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1791241218, now seen corresponding path program 2 times [2023-08-30 11:28:10,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:10,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575206799] [2023-08-30 11:28:10,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:10,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:11,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:11,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575206799] [2023-08-30 11:28:11,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575206799] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:11,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732790933] [2023-08-30 11:28:11,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:28:11,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:11,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:11,107 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:28:11,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 11:28:11,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:28:11,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:11,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 11:28:11,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:11,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 11:28:11,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:11,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:28:11,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:11,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:28:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:11,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:11,670 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_thread1Thread1of1ForFork0_~i~0#1_120| Int) (v_ArrVal_797 (Array Int Int))) (or (< |v_thread1Thread1of1ForFork0_~i~0#1_120| 2) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_797) c_~A~0.base) (+ c_~A~0.offset (* |v_thread1Thread1of1ForFork0_~i~0#1_120| 4))) 9223372039002259456)) (<= c_~N~0 |v_thread1Thread1of1ForFork0_~i~0#1_120|))) is different from false [2023-08-30 11:28:11,731 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:11,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-08-30 11:28:11,739 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:11,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 81 [2023-08-30 11:28:11,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2023-08-30 11:28:11,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2023-08-30 11:28:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:12,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732790933] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:12,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:12,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 11:28:12,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175213775] [2023-08-30 11:28:12,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:12,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 11:28:12,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:12,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 11:28:12,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=664, Unknown=1, NotChecked=52, Total=812 [2023-08-30 11:28:12,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 247 [2023-08-30 11:28:12,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 59 transitions, 580 flow. Second operand has 29 states, 29 states have (on average 69.13793103448276) internal successors, (2005), 29 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:12,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:12,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 247 [2023-08-30 11:28:12,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:20,258 INFO L130 PetriNetUnfolder]: 1648/2929 cut-off events. [2023-08-30 11:28:20,259 INFO L131 PetriNetUnfolder]: For 17197/17644 co-relation queries the response was YES. [2023-08-30 11:28:20,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15019 conditions, 2929 events. 1648/2929 cut-off events. For 17197/17644 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 19311 event pairs, 224 based on Foata normal form. 623/3550 useless extension candidates. Maximal degree in co-relation 14985. Up to 641 conditions per place. [2023-08-30 11:28:20,273 INFO L137 encePairwiseOnDemand]: 237/247 looper letters, 337 selfloop transitions, 62 changer transitions 13/413 dead transitions. [2023-08-30 11:28:20,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 413 transitions, 4230 flow [2023-08-30 11:28:20,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 11:28:20,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 11:28:20,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2788 transitions. [2023-08-30 11:28:20,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.313540260908682 [2023-08-30 11:28:20,276 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2788 transitions. [2023-08-30 11:28:20,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2788 transitions. [2023-08-30 11:28:20,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:20,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2788 transitions. [2023-08-30 11:28:20,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 77.44444444444444) internal successors, (2788), 36 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:20,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 247.0) internal successors, (9139), 37 states have internal predecessors, (9139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:20,284 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 247.0) internal successors, (9139), 37 states have internal predecessors, (9139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:20,284 INFO L175 Difference]: Start difference. First operand has 110 places, 59 transitions, 580 flow. Second operand 36 states and 2788 transitions. [2023-08-30 11:28:20,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 413 transitions, 4230 flow [2023-08-30 11:28:20,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 413 transitions, 4029 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 11:28:20,301 INFO L231 Difference]: Finished difference. Result has 151 places, 99 transitions, 1237 flow [2023-08-30 11:28:20,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1237, PETRI_PLACES=151, PETRI_TRANSITIONS=99} [2023-08-30 11:28:20,302 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 114 predicate places. [2023-08-30 11:28:20,302 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 99 transitions, 1237 flow [2023-08-30 11:28:20,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 69.13793103448276) internal successors, (2005), 29 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:20,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:20,303 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:20,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 11:28:20,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 11:28:20,505 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:20,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:20,505 INFO L85 PathProgramCache]: Analyzing trace with hash -306094746, now seen corresponding path program 2 times [2023-08-30 11:28:20,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:20,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557007128] [2023-08-30 11:28:20,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:20,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:20,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:20,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557007128] [2023-08-30 11:28:20,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557007128] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:20,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606558806] [2023-08-30 11:28:20,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:28:20,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:20,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:20,630 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:28:20,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 11:28:20,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:28:20,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:20,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 11:28:20,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:20,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:20,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:20,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606558806] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:20,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:20,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-30 11:28:20,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796653780] [2023-08-30 11:28:20,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:20,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 11:28:20,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:20,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 11:28:20,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2023-08-30 11:28:21,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 11:28:21,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 99 transitions, 1237 flow. Second operand has 24 states, 24 states have (on average 95.20833333333333) internal successors, (2285), 24 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:21,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:21,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 11:28:21,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:21,882 INFO L130 PetriNetUnfolder]: 1599/2860 cut-off events. [2023-08-30 11:28:21,882 INFO L131 PetriNetUnfolder]: For 34699/35118 co-relation queries the response was YES. [2023-08-30 11:28:21,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16460 conditions, 2860 events. 1599/2860 cut-off events. For 34699/35118 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 18667 event pairs, 482 based on Foata normal form. 459/3317 useless extension candidates. Maximal degree in co-relation 16413. Up to 1119 conditions per place. [2023-08-30 11:28:21,900 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 226 selfloop transitions, 37 changer transitions 12/276 dead transitions. [2023-08-30 11:28:21,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 276 transitions, 2904 flow [2023-08-30 11:28:21,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 11:28:21,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 11:28:21,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2257 transitions. [2023-08-30 11:28:21,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153478100846522 [2023-08-30 11:28:21,903 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2257 transitions. [2023-08-30 11:28:21,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2257 transitions. [2023-08-30 11:28:21,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:21,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2257 transitions. [2023-08-30 11:28:21,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 102.5909090909091) internal successors, (2257), 22 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:21,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 247.0) internal successors, (5681), 23 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:21,909 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 247.0) internal successors, (5681), 23 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:21,910 INFO L175 Difference]: Start difference. First operand has 151 places, 99 transitions, 1237 flow. Second operand 22 states and 2257 transitions. [2023-08-30 11:28:21,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 276 transitions, 2904 flow [2023-08-30 11:28:21,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 276 transitions, 2773 flow, removed 31 selfloop flow, removed 11 redundant places. [2023-08-30 11:28:21,935 INFO L231 Difference]: Finished difference. Result has 162 places, 97 transitions, 1149 flow [2023-08-30 11:28:21,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1149, PETRI_PLACES=162, PETRI_TRANSITIONS=97} [2023-08-30 11:28:21,935 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 125 predicate places. [2023-08-30 11:28:21,935 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 97 transitions, 1149 flow [2023-08-30 11:28:21,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 95.20833333333333) internal successors, (2285), 24 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:21,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:21,936 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:21,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-30 11:28:22,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:22,137 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:22,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:22,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1791241219, now seen corresponding path program 3 times [2023-08-30 11:28:22,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:22,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488774078] [2023-08-30 11:28:22,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:22,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:22,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:22,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488774078] [2023-08-30 11:28:22,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488774078] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:22,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341765485] [2023-08-30 11:28:22,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:28:22,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:22,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:22,470 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:28:22,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 11:28:22,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 11:28:22,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:22,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 11:28:22,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:22,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 11:28:22,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:22,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:28:22,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:22,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:28:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:22,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:23,082 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_877 (Array Int Int)) (|v_thread1Thread1of1ForFork0_~i~0#1_134| Int)) (or (< |v_thread1Thread1of1ForFork0_~i~0#1_134| 2) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_877) c_~A~0.base) (+ c_~A~0.offset (* |v_thread1Thread1of1ForFork0_~i~0#1_134| 4))) 4294967296) (<= c_~N~0 |v_thread1Thread1of1ForFork0_~i~0#1_134|))) is different from false [2023-08-30 11:28:23,156 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:23,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 11:28:23,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:23,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 141 [2023-08-30 11:28:23,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2023-08-30 11:28:23,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-08-30 11:28:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:23,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341765485] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:23,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:23,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 11:28:23,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059011540] [2023-08-30 11:28:23,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:23,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 11:28:23,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:23,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 11:28:23,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=664, Unknown=1, NotChecked=52, Total=812 [2023-08-30 11:28:23,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 247 [2023-08-30 11:28:23,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 97 transitions, 1149 flow. Second operand has 29 states, 29 states have (on average 69.13793103448276) internal successors, (2005), 29 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:23,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:23,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 247 [2023-08-30 11:28:23,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:31,510 INFO L130 PetriNetUnfolder]: 1487/2681 cut-off events. [2023-08-30 11:28:31,510 INFO L131 PetriNetUnfolder]: For 30200/30616 co-relation queries the response was YES. [2023-08-30 11:28:31,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14974 conditions, 2681 events. 1487/2681 cut-off events. For 30200/30616 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17581 event pairs, 116 based on Foata normal form. 499/3178 useless extension candidates. Maximal degree in co-relation 14926. Up to 605 conditions per place. [2023-08-30 11:28:31,522 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 326 selfloop transitions, 58 changer transitions 18/403 dead transitions. [2023-08-30 11:28:31,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 403 transitions, 4284 flow [2023-08-30 11:28:31,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 11:28:31,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 11:28:31,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2771 transitions. [2023-08-30 11:28:31,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3116284300494827 [2023-08-30 11:28:31,526 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2771 transitions. [2023-08-30 11:28:31,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2771 transitions. [2023-08-30 11:28:31,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:31,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2771 transitions. [2023-08-30 11:28:31,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 76.97222222222223) internal successors, (2771), 36 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:31,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 247.0) internal successors, (9139), 37 states have internal predecessors, (9139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:31,536 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 247.0) internal successors, (9139), 37 states have internal predecessors, (9139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:31,536 INFO L175 Difference]: Start difference. First operand has 162 places, 97 transitions, 1149 flow. Second operand 36 states and 2771 transitions. [2023-08-30 11:28:31,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 403 transitions, 4284 flow [2023-08-30 11:28:31,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 403 transitions, 4226 flow, removed 6 selfloop flow, removed 12 redundant places. [2023-08-30 11:28:31,574 INFO L231 Difference]: Finished difference. Result has 185 places, 94 transitions, 1153 flow [2023-08-30 11:28:31,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1153, PETRI_PLACES=185, PETRI_TRANSITIONS=94} [2023-08-30 11:28:31,575 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 148 predicate places. [2023-08-30 11:28:31,575 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 94 transitions, 1153 flow [2023-08-30 11:28:31,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 69.13793103448276) internal successors, (2005), 29 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:31,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:31,575 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:31,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 11:28:31,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:31,781 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:31,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:31,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1386002010, now seen corresponding path program 2 times [2023-08-30 11:28:31,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:31,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431088680] [2023-08-30 11:28:31,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:31,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:31,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:31,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431088680] [2023-08-30 11:28:31,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431088680] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:31,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654109910] [2023-08-30 11:28:31,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:28:31,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:31,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:31,877 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:28:31,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 11:28:32,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:28:32,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:32,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 11:28:32,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:32,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:32,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654109910] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:32,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:32,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 11:28:32,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283328103] [2023-08-30 11:28:32,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:32,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 11:28:32,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:32,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 11:28:32,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-08-30 11:28:32,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 11:28:32,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 94 transitions, 1153 flow. Second operand has 19 states, 19 states have (on average 95.3157894736842) internal successors, (1811), 19 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:32,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:32,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 11:28:32,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:32,773 INFO L130 PetriNetUnfolder]: 1424/2588 cut-off events. [2023-08-30 11:28:32,773 INFO L131 PetriNetUnfolder]: For 31625/31833 co-relation queries the response was YES. [2023-08-30 11:28:32,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14749 conditions, 2588 events. 1424/2588 cut-off events. For 31625/31833 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 16751 event pairs, 701 based on Foata normal form. 280/2858 useless extension candidates. Maximal degree in co-relation 14700. Up to 1684 conditions per place. [2023-08-30 11:28:32,788 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 83 selfloop transitions, 5 changer transitions 83/177 dead transitions. [2023-08-30 11:28:32,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 177 transitions, 2223 flow [2023-08-30 11:28:32,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 11:28:32,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 11:28:32,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1204 transitions. [2023-08-30 11:28:32,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40620782726045884 [2023-08-30 11:28:32,790 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1204 transitions. [2023-08-30 11:28:32,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1204 transitions. [2023-08-30 11:28:32,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:32,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1204 transitions. [2023-08-30 11:28:32,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 100.33333333333333) internal successors, (1204), 12 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:32,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:32,793 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:32,793 INFO L175 Difference]: Start difference. First operand has 185 places, 94 transitions, 1153 flow. Second operand 12 states and 1204 transitions. [2023-08-30 11:28:32,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 177 transitions, 2223 flow [2023-08-30 11:28:32,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 177 transitions, 2085 flow, removed 3 selfloop flow, removed 21 redundant places. [2023-08-30 11:28:32,827 INFO L231 Difference]: Finished difference. Result has 179 places, 80 transitions, 953 flow [2023-08-30 11:28:32,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=953, PETRI_PLACES=179, PETRI_TRANSITIONS=80} [2023-08-30 11:28:32,828 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 142 predicate places. [2023-08-30 11:28:32,828 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 80 transitions, 953 flow [2023-08-30 11:28:32,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 95.3157894736842) internal successors, (1811), 19 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:32,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:32,828 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:32,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 11:28:33,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:33,029 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:33,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:33,029 INFO L85 PathProgramCache]: Analyzing trace with hash 135157845, now seen corresponding path program 1 times [2023-08-30 11:28:33,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:33,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242195339] [2023-08-30 11:28:33,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:33,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:28:33,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:33,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242195339] [2023-08-30 11:28:33,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242195339] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:33,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555001573] [2023-08-30 11:28:33,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:33,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:33,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:33,082 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:28:33,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 11:28:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:33,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 11:28:33,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:28:33,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:28:33,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555001573] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:33,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:33,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-30 11:28:33,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006545405] [2023-08-30 11:28:33,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:33,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 11:28:33,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:33,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 11:28:33,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-30 11:28:33,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 247 [2023-08-30 11:28:33,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 80 transitions, 953 flow. Second operand has 9 states, 9 states have (on average 105.66666666666667) internal successors, (951), 9 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:33,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:33,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 247 [2023-08-30 11:28:33,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:33,853 INFO L130 PetriNetUnfolder]: 1943/3547 cut-off events. [2023-08-30 11:28:33,853 INFO L131 PetriNetUnfolder]: For 52704/53306 co-relation queries the response was YES. [2023-08-30 11:28:33,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22412 conditions, 3547 events. 1943/3547 cut-off events. For 52704/53306 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24359 event pairs, 406 based on Foata normal form. 776/4323 useless extension candidates. Maximal degree in co-relation 22360. Up to 787 conditions per place. [2023-08-30 11:28:33,873 INFO L137 encePairwiseOnDemand]: 244/247 looper letters, 151 selfloop transitions, 30 changer transitions 0/182 dead transitions. [2023-08-30 11:28:33,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 182 transitions, 2449 flow [2023-08-30 11:28:33,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 11:28:33,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 11:28:33,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 941 transitions. [2023-08-30 11:28:33,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47621457489878544 [2023-08-30 11:28:33,874 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 941 transitions. [2023-08-30 11:28:33,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 941 transitions. [2023-08-30 11:28:33,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:33,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 941 transitions. [2023-08-30 11:28:33,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 117.625) internal successors, (941), 8 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:33,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 247.0) internal successors, (2223), 9 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:33,876 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 247.0) internal successors, (2223), 9 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:33,876 INFO L175 Difference]: Start difference. First operand has 179 places, 80 transitions, 953 flow. Second operand 8 states and 941 transitions. [2023-08-30 11:28:33,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 182 transitions, 2449 flow [2023-08-30 11:28:33,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 182 transitions, 2110 flow, removed 113 selfloop flow, removed 21 redundant places. [2023-08-30 11:28:33,942 INFO L231 Difference]: Finished difference. Result has 148 places, 83 transitions, 977 flow [2023-08-30 11:28:33,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=977, PETRI_PLACES=148, PETRI_TRANSITIONS=83} [2023-08-30 11:28:33,942 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 111 predicate places. [2023-08-30 11:28:33,942 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 83 transitions, 977 flow [2023-08-30 11:28:33,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 105.66666666666667) internal successors, (951), 9 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:33,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:33,943 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:33,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 11:28:34,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:34,143 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:34,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:34,144 INFO L85 PathProgramCache]: Analyzing trace with hash -270081404, now seen corresponding path program 3 times [2023-08-30 11:28:34,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:34,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866273658] [2023-08-30 11:28:34,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:34,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:34,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:34,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866273658] [2023-08-30 11:28:34,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866273658] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:34,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477491455] [2023-08-30 11:28:34,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:28:34,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:34,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:34,437 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:28:34,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 11:28:34,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 11:28:34,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:34,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 11:28:34,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:34,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:28:34,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:34,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:28:34,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:34,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:28:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:34,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:34,891 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_995 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_995) c_~A~0.base) (+ c_~A~0.offset 8)) 9223372039002259456)) is different from false [2023-08-30 11:28:34,898 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_995 (Array Int Int)) (v_ArrVal_994 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_994) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_995) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456)) is different from false [2023-08-30 11:28:34,905 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:34,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 11:28:34,910 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:34,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 129 [2023-08-30 11:28:34,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 11:28:34,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-30 11:28:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-30 11:28:35,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477491455] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:35,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:35,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-30 11:28:35,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953483260] [2023-08-30 11:28:35,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:35,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 11:28:35,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:35,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 11:28:35,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=526, Unknown=2, NotChecked=94, Total=702 [2023-08-30 11:28:35,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:28:35,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 83 transitions, 977 flow. Second operand has 27 states, 27 states have (on average 78.25925925925925) internal successors, (2113), 27 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:35,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:35,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:28:35,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:35,989 INFO L130 PetriNetUnfolder]: 2573/4684 cut-off events. [2023-08-30 11:28:35,989 INFO L131 PetriNetUnfolder]: For 54621/54877 co-relation queries the response was YES. [2023-08-30 11:28:36,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26907 conditions, 4684 events. 2573/4684 cut-off events. For 54621/54877 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 33388 event pairs, 582 based on Foata normal form. 660/5336 useless extension candidates. Maximal degree in co-relation 26864. Up to 1491 conditions per place. [2023-08-30 11:28:36,011 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 227 selfloop transitions, 15 changer transitions 0/248 dead transitions. [2023-08-30 11:28:36,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 248 transitions, 3605 flow [2023-08-30 11:28:36,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 11:28:36,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 11:28:36,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 998 transitions. [2023-08-30 11:28:36,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3367071524966262 [2023-08-30 11:28:36,013 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 998 transitions. [2023-08-30 11:28:36,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 998 transitions. [2023-08-30 11:28:36,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:36,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 998 transitions. [2023-08-30 11:28:36,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 83.16666666666667) internal successors, (998), 12 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:36,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:36,015 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:36,015 INFO L175 Difference]: Start difference. First operand has 148 places, 83 transitions, 977 flow. Second operand 12 states and 998 transitions. [2023-08-30 11:28:36,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 248 transitions, 3605 flow [2023-08-30 11:28:36,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 248 transitions, 3458 flow, removed 36 selfloop flow, removed 2 redundant places. [2023-08-30 11:28:36,049 INFO L231 Difference]: Finished difference. Result has 159 places, 85 transitions, 996 flow [2023-08-30 11:28:36,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=996, PETRI_PLACES=159, PETRI_TRANSITIONS=85} [2023-08-30 11:28:36,049 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 122 predicate places. [2023-08-30 11:28:36,049 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 85 transitions, 996 flow [2023-08-30 11:28:36,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 78.25925925925925) internal successors, (2113), 27 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:36,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:36,050 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:36,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 11:28:36,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-30 11:28:36,250 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:36,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:36,251 INFO L85 PathProgramCache]: Analyzing trace with hash -270081403, now seen corresponding path program 3 times [2023-08-30 11:28:36,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:36,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246197509] [2023-08-30 11:28:36,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:36,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:36,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:36,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:36,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246197509] [2023-08-30 11:28:36,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246197509] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:36,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662727606] [2023-08-30 11:28:36,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:28:36,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:36,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:36,569 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:28:36,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 11:28:36,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 11:28:36,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:36,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 11:28:36,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:36,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 11:28:36,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:36,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:28:36,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:36,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:28:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:37,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:37,240 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_thread2Thread1of1ForFork1_~i~1#1_93| Int) (v_ArrVal_1037 (Array Int Int))) (or (<= c_~N~0 |v_thread2Thread1of1ForFork1_~i~1#1_93|) (< 0 (+ 4294967296 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1037) c_~A~0.base) (+ c_~A~0.offset (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_93|))))) (< |v_thread2Thread1of1ForFork1_~i~1#1_93| 2))) is different from false [2023-08-30 11:28:37,310 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:37,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-08-30 11:28:37,317 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:37,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 81 [2023-08-30 11:28:37,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2023-08-30 11:28:37,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2023-08-30 11:28:37,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:37,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662727606] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:37,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:37,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 11:28:37,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522944910] [2023-08-30 11:28:37,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:37,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 11:28:37,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:37,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 11:28:37,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=664, Unknown=1, NotChecked=52, Total=812 [2023-08-30 11:28:37,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 247 [2023-08-30 11:28:37,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 85 transitions, 996 flow. Second operand has 29 states, 29 states have (on average 69.24137931034483) internal successors, (2008), 29 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:37,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:37,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 247 [2023-08-30 11:28:37,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:45,166 INFO L130 PetriNetUnfolder]: 2319/4264 cut-off events. [2023-08-30 11:28:45,166 INFO L131 PetriNetUnfolder]: For 41363/41543 co-relation queries the response was YES. [2023-08-30 11:28:45,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25840 conditions, 4264 events. 2319/4264 cut-off events. For 41363/41543 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29836 event pairs, 268 based on Foata normal form. 430/4690 useless extension candidates. Maximal degree in co-relation 25793. Up to 923 conditions per place. [2023-08-30 11:28:45,194 INFO L137 encePairwiseOnDemand]: 236/247 looper letters, 307 selfloop transitions, 35 changer transitions 61/409 dead transitions. [2023-08-30 11:28:45,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 409 transitions, 5480 flow [2023-08-30 11:28:45,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 11:28:45,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 11:28:45,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2243 transitions. [2023-08-30 11:28:45,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3026990553306343 [2023-08-30 11:28:45,197 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2243 transitions. [2023-08-30 11:28:45,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2243 transitions. [2023-08-30 11:28:45,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:45,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2243 transitions. [2023-08-30 11:28:45,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 74.76666666666667) internal successors, (2243), 30 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:45,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 247.0) internal successors, (7657), 31 states have internal predecessors, (7657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:45,206 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 247.0) internal successors, (7657), 31 states have internal predecessors, (7657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:45,206 INFO L175 Difference]: Start difference. First operand has 159 places, 85 transitions, 996 flow. Second operand 30 states and 2243 transitions. [2023-08-30 11:28:45,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 409 transitions, 5480 flow [2023-08-30 11:28:45,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 409 transitions, 5411 flow, removed 6 selfloop flow, removed 9 redundant places. [2023-08-30 11:28:45,267 INFO L231 Difference]: Finished difference. Result has 183 places, 105 transitions, 1215 flow [2023-08-30 11:28:45,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1215, PETRI_PLACES=183, PETRI_TRANSITIONS=105} [2023-08-30 11:28:45,267 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 146 predicate places. [2023-08-30 11:28:45,267 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 105 transitions, 1215 flow [2023-08-30 11:28:45,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 69.24137931034483) internal successors, (2008), 29 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:45,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:45,268 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2023-08-30 11:28:45,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-30 11:28:45,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-30 11:28:45,468 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:45,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:45,469 INFO L85 PathProgramCache]: Analyzing trace with hash 215794124, now seen corresponding path program 3 times [2023-08-30 11:28:45,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:45,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953901631] [2023-08-30 11:28:45,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:45,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:45,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:45,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953901631] [2023-08-30 11:28:45,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953901631] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:45,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82072584] [2023-08-30 11:28:45,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:28:45,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:45,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:45,885 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:28:45,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 11:28:46,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 11:28:46,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:46,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 11:28:46,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:46,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 11:28:46,264 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-30 11:28:46,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2023-08-30 11:28:46,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:46,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:28:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:46,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:46,623 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 11:28:46,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2023-08-30 11:28:46,633 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:46,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2023-08-30 11:28:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:46,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82072584] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:46,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:46,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-30 11:28:46,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737306556] [2023-08-30 11:28:46,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:46,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 11:28:46,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:46,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 11:28:46,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1067, Unknown=16, NotChecked=0, Total=1190 [2023-08-30 11:28:48,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 247 [2023-08-30 11:28:48,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 105 transitions, 1215 flow. Second operand has 35 states, 35 states have (on average 91.11428571428571) internal successors, (3189), 35 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:48,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:48,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 247 [2023-08-30 11:28:48,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:49,577 INFO L130 PetriNetUnfolder]: 2074/3805 cut-off events. [2023-08-30 11:28:49,578 INFO L131 PetriNetUnfolder]: For 47631/48215 co-relation queries the response was YES. [2023-08-30 11:28:49,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24699 conditions, 3805 events. 2074/3805 cut-off events. For 47631/48215 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 25729 event pairs, 1321 based on Foata normal form. 581/4356 useless extension candidates. Maximal degree in co-relation 24649. Up to 3036 conditions per place. [2023-08-30 11:28:49,605 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 122 selfloop transitions, 31 changer transitions 0/156 dead transitions. [2023-08-30 11:28:49,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 156 transitions, 2038 flow [2023-08-30 11:28:49,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 11:28:49,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 11:28:49,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1417 transitions. [2023-08-30 11:28:49,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824561403508772 [2023-08-30 11:28:49,608 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1417 transitions. [2023-08-30 11:28:49,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1417 transitions. [2023-08-30 11:28:49,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:49,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1417 transitions. [2023-08-30 11:28:49,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 94.46666666666667) internal successors, (1417), 15 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:49,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 247.0) internal successors, (3952), 16 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:49,611 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 247.0) internal successors, (3952), 16 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:49,611 INFO L175 Difference]: Start difference. First operand has 183 places, 105 transitions, 1215 flow. Second operand 15 states and 1417 transitions. [2023-08-30 11:28:49,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 156 transitions, 2038 flow [2023-08-30 11:28:49,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 156 transitions, 1949 flow, removed 25 selfloop flow, removed 9 redundant places. [2023-08-30 11:28:49,676 INFO L231 Difference]: Finished difference. Result has 191 places, 113 transitions, 1334 flow [2023-08-30 11:28:49,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1334, PETRI_PLACES=191, PETRI_TRANSITIONS=113} [2023-08-30 11:28:49,676 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 154 predicate places. [2023-08-30 11:28:49,677 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 113 transitions, 1334 flow [2023-08-30 11:28:49,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 91.11428571428571) internal successors, (3189), 35 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:49,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:49,677 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2023-08-30 11:28:49,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 11:28:49,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-30 11:28:49,884 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:49,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:49,884 INFO L85 PathProgramCache]: Analyzing trace with hash 215794123, now seen corresponding path program 4 times [2023-08-30 11:28:49,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:49,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651048691] [2023-08-30 11:28:49,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:49,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:50,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:50,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651048691] [2023-08-30 11:28:50,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651048691] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:50,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508699522] [2023-08-30 11:28:50,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:28:50,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:50,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:50,292 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:28:50,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 11:28:50,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:28:50,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:50,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 11:28:50,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:50,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:28:50,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:50,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 11:28:50,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:50,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:28:50,722 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:50,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:50,821 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1131 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1131) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2023-08-30 11:28:50,878 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 11:28:50,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 39 [2023-08-30 11:28:50,884 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:50,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2023-08-30 11:28:50,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-08-30 11:28:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-08-30 11:28:50,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508699522] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:50,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:50,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-30 11:28:50,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328960700] [2023-08-30 11:28:50,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:50,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 11:28:50,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:50,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 11:28:50,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=889, Unknown=6, NotChecked=60, Total=1056 [2023-08-30 11:28:51,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 11:28:51,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 113 transitions, 1334 flow. Second operand has 33 states, 33 states have (on average 81.12121212121212) internal successors, (2677), 33 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:51,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:51,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 11:28:51,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:51,968 INFO L130 PetriNetUnfolder]: 2061/3761 cut-off events. [2023-08-30 11:28:51,968 INFO L131 PetriNetUnfolder]: For 42072/42670 co-relation queries the response was YES. [2023-08-30 11:28:51,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23887 conditions, 3761 events. 2061/3761 cut-off events. For 42072/42670 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 25113 event pairs, 1380 based on Foata normal form. 593/4325 useless extension candidates. Maximal degree in co-relation 23832. Up to 2998 conditions per place. [2023-08-30 11:28:51,993 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 121 selfloop transitions, 30 changer transitions 0/154 dead transitions. [2023-08-30 11:28:51,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 154 transitions, 2024 flow [2023-08-30 11:28:51,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 11:28:51,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 11:28:51,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1266 transitions. [2023-08-30 11:28:51,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3417004048582996 [2023-08-30 11:28:51,995 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1266 transitions. [2023-08-30 11:28:51,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1266 transitions. [2023-08-30 11:28:51,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:51,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1266 transitions. [2023-08-30 11:28:51,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 84.4) internal successors, (1266), 15 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:51,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 247.0) internal successors, (3952), 16 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:52,000 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 247.0) internal successors, (3952), 16 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:52,000 INFO L175 Difference]: Start difference. First operand has 191 places, 113 transitions, 1334 flow. Second operand 15 states and 1266 transitions. [2023-08-30 11:28:52,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 154 transitions, 2024 flow [2023-08-30 11:28:52,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 154 transitions, 1960 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-08-30 11:28:52,044 INFO L231 Difference]: Finished difference. Result has 197 places, 111 transitions, 1303 flow [2023-08-30 11:28:52,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1303, PETRI_PLACES=197, PETRI_TRANSITIONS=111} [2023-08-30 11:28:52,045 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 160 predicate places. [2023-08-30 11:28:52,045 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 111 transitions, 1303 flow [2023-08-30 11:28:52,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 81.12121212121212) internal successors, (2677), 33 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:52,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:52,045 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:52,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 11:28:52,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:52,246 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:52,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:52,246 INFO L85 PathProgramCache]: Analyzing trace with hash 217413527, now seen corresponding path program 4 times [2023-08-30 11:28:52,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:52,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640915911] [2023-08-30 11:28:52,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:52,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:52,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:52,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640915911] [2023-08-30 11:28:52,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640915911] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:52,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232546243] [2023-08-30 11:28:52,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:28:52,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:52,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:52,377 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:28:52,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 11:28:52,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:28:52,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:52,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 11:28:52,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:52,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:52,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232546243] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:52,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:52,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-30 11:28:52,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727818895] [2023-08-30 11:28:52,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:52,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 11:28:52,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:52,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 11:28:52,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2023-08-30 11:28:52,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 11:28:52,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 111 transitions, 1303 flow. Second operand has 24 states, 24 states have (on average 95.25) internal successors, (2286), 24 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:52,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:52,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 11:28:52,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:53,572 INFO L130 PetriNetUnfolder]: 2104/3851 cut-off events. [2023-08-30 11:28:53,573 INFO L131 PetriNetUnfolder]: For 37885/38071 co-relation queries the response was YES. [2023-08-30 11:28:53,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24243 conditions, 3851 events. 2104/3851 cut-off events. For 37885/38071 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 26023 event pairs, 1141 based on Foata normal form. 234/4077 useless extension candidates. Maximal degree in co-relation 24189. Up to 2486 conditions per place. [2023-08-30 11:28:53,601 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 86 selfloop transitions, 13 changer transitions 78/181 dead transitions. [2023-08-30 11:28:53,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 181 transitions, 2298 flow [2023-08-30 11:28:53,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 11:28:53,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 11:28:53,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1196 transitions. [2023-08-30 11:28:53,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40350877192982454 [2023-08-30 11:28:53,603 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1196 transitions. [2023-08-30 11:28:53,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1196 transitions. [2023-08-30 11:28:53,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:53,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1196 transitions. [2023-08-30 11:28:53,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 99.66666666666667) internal successors, (1196), 12 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:53,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:53,606 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:53,606 INFO L175 Difference]: Start difference. First operand has 197 places, 111 transitions, 1303 flow. Second operand 12 states and 1196 transitions. [2023-08-30 11:28:53,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 181 transitions, 2298 flow [2023-08-30 11:28:53,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 181 transitions, 2240 flow, removed 2 selfloop flow, removed 12 redundant places. [2023-08-30 11:28:53,650 INFO L231 Difference]: Finished difference. Result has 197 places, 87 transitions, 1045 flow [2023-08-30 11:28:53,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1045, PETRI_PLACES=197, PETRI_TRANSITIONS=87} [2023-08-30 11:28:53,650 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 160 predicate places. [2023-08-30 11:28:53,650 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 87 transitions, 1045 flow [2023-08-30 11:28:53,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 95.25) internal successors, (2286), 24 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:53,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:53,651 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:53,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 11:28:53,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 11:28:53,852 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:53,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:53,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1831633926, now seen corresponding path program 4 times [2023-08-30 11:28:53,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:53,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577895339] [2023-08-30 11:28:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:53,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:54,322 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:54,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:54,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577895339] [2023-08-30 11:28:54,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577895339] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:54,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155136989] [2023-08-30 11:28:54,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:28:54,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:54,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:54,324 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:28:54,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 11:28:54,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:28:54,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:54,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 11:28:54,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:54,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:28:54,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:54,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-08-30 11:28:54,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:54,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:28:54,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:28:54,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:28:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:54,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:55,025 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 11:28:55,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 40 [2023-08-30 11:28:55,033 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:28:55,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 129 [2023-08-30 11:28:55,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 11:28:55,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-30 11:28:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:55,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155136989] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:55,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:55,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-30 11:28:55,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069751849] [2023-08-30 11:28:55,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:55,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 11:28:55,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:55,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 11:28:55,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1131, Unknown=10, NotChecked=0, Total=1260 [2023-08-30 11:28:55,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:28:55,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 87 transitions, 1045 flow. Second operand has 36 states, 36 states have (on average 78.13888888888889) internal successors, (2813), 36 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:55,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:55,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:28:55,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:56,633 INFO L130 PetriNetUnfolder]: 1842/3359 cut-off events. [2023-08-30 11:28:56,633 INFO L131 PetriNetUnfolder]: For 36999/37604 co-relation queries the response was YES. [2023-08-30 11:28:56,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22315 conditions, 3359 events. 1842/3359 cut-off events. For 36999/37604 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 22652 event pairs, 781 based on Foata normal form. 630/3979 useless extension candidates. Maximal degree in co-relation 22260. Up to 1444 conditions per place. [2023-08-30 11:28:56,658 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 192 selfloop transitions, 33 changer transitions 5/232 dead transitions. [2023-08-30 11:28:56,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 232 transitions, 2981 flow [2023-08-30 11:28:56,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 11:28:56,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 11:28:56,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1175 transitions. [2023-08-30 11:28:56,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3397917871602082 [2023-08-30 11:28:56,660 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1175 transitions. [2023-08-30 11:28:56,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1175 transitions. [2023-08-30 11:28:56,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:56,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1175 transitions. [2023-08-30 11:28:56,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 83.92857142857143) internal successors, (1175), 14 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:56,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 247.0) internal successors, (3705), 15 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:56,664 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 247.0) internal successors, (3705), 15 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:56,664 INFO L175 Difference]: Start difference. First operand has 197 places, 87 transitions, 1045 flow. Second operand 14 states and 1175 transitions. [2023-08-30 11:28:56,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 232 transitions, 2981 flow [2023-08-30 11:28:56,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 232 transitions, 2677 flow, removed 87 selfloop flow, removed 25 redundant places. [2023-08-30 11:28:56,750 INFO L231 Difference]: Finished difference. Result has 163 places, 88 transitions, 1029 flow [2023-08-30 11:28:56,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1029, PETRI_PLACES=163, PETRI_TRANSITIONS=88} [2023-08-30 11:28:56,750 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 126 predicate places. [2023-08-30 11:28:56,751 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 88 transitions, 1029 flow [2023-08-30 11:28:56,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 78.13888888888889) internal successors, (2813), 36 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:56,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:56,751 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:56,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 11:28:56,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-30 11:28:56,953 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:56,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:56,953 INFO L85 PathProgramCache]: Analyzing trace with hash -2140846809, now seen corresponding path program 1 times [2023-08-30 11:28:56,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:56,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797809668] [2023-08-30 11:28:56,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:56,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:57,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:28:57,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:57,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797809668] [2023-08-30 11:28:57,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797809668] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:57,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676183837] [2023-08-30 11:28:57,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:57,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:57,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:57,016 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:28:57,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 11:28:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:57,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 11:28:57,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:28:57,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:28:57,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676183837] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:28:57,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:28:57,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-30 11:28:57,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179258417] [2023-08-30 11:28:57,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:28:57,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 11:28:57,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:57,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 11:28:57,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:28:57,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 247 [2023-08-30 11:28:57,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 88 transitions, 1029 flow. Second operand has 6 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:57,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:57,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 247 [2023-08-30 11:28:57,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:57,621 INFO L130 PetriNetUnfolder]: 1775/3238 cut-off events. [2023-08-30 11:28:57,621 INFO L131 PetriNetUnfolder]: For 26904/27083 co-relation queries the response was YES. [2023-08-30 11:28:57,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20358 conditions, 3238 events. 1775/3238 cut-off events. For 26904/27083 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21569 event pairs, 80 based on Foata normal form. 297/3527 useless extension candidates. Maximal degree in co-relation 20315. Up to 1333 conditions per place. [2023-08-30 11:28:57,645 INFO L137 encePairwiseOnDemand]: 244/247 looper letters, 174 selfloop transitions, 10 changer transitions 0/188 dead transitions. [2023-08-30 11:28:57,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 188 transitions, 2834 flow [2023-08-30 11:28:57,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 11:28:57,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 11:28:57,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 683 transitions. [2023-08-30 11:28:57,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.460863697705803 [2023-08-30 11:28:57,646 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 683 transitions. [2023-08-30 11:28:57,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 683 transitions. [2023-08-30 11:28:57,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:57,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 683 transitions. [2023-08-30 11:28:57,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.83333333333333) internal successors, (683), 6 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:57,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 247.0) internal successors, (1729), 7 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:57,648 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 247.0) internal successors, (1729), 7 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:57,648 INFO L175 Difference]: Start difference. First operand has 163 places, 88 transitions, 1029 flow. Second operand 6 states and 683 transitions. [2023-08-30 11:28:57,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 188 transitions, 2834 flow [2023-08-30 11:28:57,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 188 transitions, 2627 flow, removed 15 selfloop flow, removed 13 redundant places. [2023-08-30 11:28:57,670 INFO L231 Difference]: Finished difference. Result has 154 places, 86 transitions, 939 flow [2023-08-30 11:28:57,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=939, PETRI_PLACES=154, PETRI_TRANSITIONS=86} [2023-08-30 11:28:57,670 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 117 predicate places. [2023-08-30 11:28:57,670 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 86 transitions, 939 flow [2023-08-30 11:28:57,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:57,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:57,671 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:57,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-08-30 11:28:57,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-30 11:28:57,871 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:57,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:57,871 INFO L85 PathProgramCache]: Analyzing trace with hash -2140846785, now seen corresponding path program 1 times [2023-08-30 11:28:57,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:57,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963582530] [2023-08-30 11:28:57,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:57,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:57,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:28:57,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:57,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963582530] [2023-08-30 11:28:57,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963582530] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:57,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181285225] [2023-08-30 11:28:57,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:57,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:57,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:57,933 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:28:57,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 11:28:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:58,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 11:28:58,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:28:58,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:28:58,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181285225] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:58,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:58,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 11:28:58,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825558239] [2023-08-30 11:28:58,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:58,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 11:28:58,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:58,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 11:28:58,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2023-08-30 11:28:58,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 247 [2023-08-30 11:28:58,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 86 transitions, 939 flow. Second operand has 11 states, 11 states have (on average 105.63636363636364) internal successors, (1162), 11 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:58,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:58,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 247 [2023-08-30 11:28:58,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:59,114 INFO L130 PetriNetUnfolder]: 4415/8008 cut-off events. [2023-08-30 11:28:59,114 INFO L131 PetriNetUnfolder]: For 67784/68305 co-relation queries the response was YES. [2023-08-30 11:28:59,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50888 conditions, 8008 events. 4415/8008 cut-off events. For 67784/68305 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 59380 event pairs, 693 based on Foata normal form. 1071/9073 useless extension candidates. Maximal degree in co-relation 50848. Up to 1648 conditions per place. [2023-08-30 11:28:59,165 INFO L137 encePairwiseOnDemand]: 244/247 looper letters, 305 selfloop transitions, 15 changer transitions 0/324 dead transitions. [2023-08-30 11:28:59,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 324 transitions, 4586 flow [2023-08-30 11:28:59,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 11:28:59,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 11:28:59,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1155 transitions. [2023-08-30 11:28:59,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4676113360323887 [2023-08-30 11:28:59,166 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1155 transitions. [2023-08-30 11:28:59,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1155 transitions. [2023-08-30 11:28:59,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:59,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1155 transitions. [2023-08-30 11:28:59,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 115.5) internal successors, (1155), 10 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:59,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 247.0) internal successors, (2717), 11 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:59,170 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 247.0) internal successors, (2717), 11 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:59,170 INFO L175 Difference]: Start difference. First operand has 154 places, 86 transitions, 939 flow. Second operand 10 states and 1155 transitions. [2023-08-30 11:28:59,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 324 transitions, 4586 flow [2023-08-30 11:28:59,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 324 transitions, 4568 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 11:28:59,217 INFO L231 Difference]: Finished difference. Result has 164 places, 91 transitions, 1034 flow [2023-08-30 11:28:59,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1034, PETRI_PLACES=164, PETRI_TRANSITIONS=91} [2023-08-30 11:28:59,218 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 127 predicate places. [2023-08-30 11:28:59,218 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 91 transitions, 1034 flow [2023-08-30 11:28:59,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 105.63636363636364) internal successors, (1162), 11 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:59,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:59,218 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:59,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 11:28:59,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:59,419 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:28:59,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:59,420 INFO L85 PathProgramCache]: Analyzing trace with hash -2140846846, now seen corresponding path program 5 times [2023-08-30 11:28:59,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:59,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75140268] [2023-08-30 11:28:59,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:59,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:59,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:59,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75140268] [2023-08-30 11:28:59,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75140268] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:59,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621546903] [2023-08-30 11:28:59,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:28:59,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:59,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:59,774 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:28:59,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 11:28:59,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 11:28:59,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:59,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 11:28:59,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:00,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:29:00,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:00,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:29:00,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:00,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:29:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:00,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:00,282 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1351 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1351) c_~A~0.base) (+ c_~A~0.offset 12)) 9223372039002259456)) is different from false [2023-08-30 11:29:00,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:00,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 11:29:00,330 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:00,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 129 [2023-08-30 11:29:00,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 11:29:00,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-30 11:29:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:00,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621546903] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:00,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:00,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-30 11:29:00,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816288189] [2023-08-30 11:29:00,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:00,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 11:29:00,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:00,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 11:29:00,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=891, Unknown=3, NotChecked=60, Total=1056 [2023-08-30 11:29:00,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:29:00,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 91 transitions, 1034 flow. Second operand has 33 states, 33 states have (on average 78.21212121212122) internal successors, (2581), 33 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:00,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:00,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:29:00,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:02,052 INFO L130 PetriNetUnfolder]: 4268/7743 cut-off events. [2023-08-30 11:29:02,052 INFO L131 PetriNetUnfolder]: For 62854/63357 co-relation queries the response was YES. [2023-08-30 11:29:02,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51069 conditions, 7743 events. 4268/7743 cut-off events. For 62854/63357 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 56828 event pairs, 2105 based on Foata normal form. 621/8358 useless extension candidates. Maximal degree in co-relation 51024. Up to 4400 conditions per place. [2023-08-30 11:29:02,111 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 217 selfloop transitions, 21 changer transitions 0/242 dead transitions. [2023-08-30 11:29:02,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 242 transitions, 3475 flow [2023-08-30 11:29:02,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 11:29:02,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 11:29:02,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1160 transitions. [2023-08-30 11:29:02,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33545401966454597 [2023-08-30 11:29:02,113 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1160 transitions. [2023-08-30 11:29:02,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1160 transitions. [2023-08-30 11:29:02,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:02,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1160 transitions. [2023-08-30 11:29:02,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 82.85714285714286) internal successors, (1160), 14 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:02,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 247.0) internal successors, (3705), 15 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:02,116 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 247.0) internal successors, (3705), 15 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:02,116 INFO L175 Difference]: Start difference. First operand has 164 places, 91 transitions, 1034 flow. Second operand 14 states and 1160 transitions. [2023-08-30 11:29:02,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 242 transitions, 3475 flow [2023-08-30 11:29:02,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 242 transitions, 3455 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 11:29:02,171 INFO L231 Difference]: Finished difference. Result has 176 places, 92 transitions, 1083 flow [2023-08-30 11:29:02,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1083, PETRI_PLACES=176, PETRI_TRANSITIONS=92} [2023-08-30 11:29:02,171 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 139 predicate places. [2023-08-30 11:29:02,172 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 92 transitions, 1083 flow [2023-08-30 11:29:02,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 78.21212121212122) internal successors, (2581), 33 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:02,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:02,172 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1] [2023-08-30 11:29:02,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-30 11:29:02,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-08-30 11:29:02,378 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:02,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:02,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1831633925, now seen corresponding path program 3 times [2023-08-30 11:29:02,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:02,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733815828] [2023-08-30 11:29:02,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:02,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:02,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:02,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733815828] [2023-08-30 11:29:02,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733815828] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:02,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808674758] [2023-08-30 11:29:02,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:29:02,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:02,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:02,841 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:29:02,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 11:29:03,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 11:29:03,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:29:03,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 11:29:03,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:03,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:29:03,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:03,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 11:29:03,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:03,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:29:03,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:03,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:29:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:03,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:03,643 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 11:29:03,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 42 [2023-08-30 11:29:03,649 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:03,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 75 [2023-08-30 11:29:03,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2023-08-30 11:29:03,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-08-30 11:29:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:03,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808674758] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:03,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:03,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-30 11:29:03,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780601694] [2023-08-30 11:29:03,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:03,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 11:29:03,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:03,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 11:29:03,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1134, Unknown=7, NotChecked=0, Total=1260 [2023-08-30 11:29:04,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:29:04,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 92 transitions, 1083 flow. Second operand has 36 states, 36 states have (on average 78.13888888888889) internal successors, (2813), 36 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:04,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:04,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:29:04,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:05,812 INFO L130 PetriNetUnfolder]: 4190/7602 cut-off events. [2023-08-30 11:29:05,812 INFO L131 PetriNetUnfolder]: For 61935/62483 co-relation queries the response was YES. [2023-08-30 11:29:05,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51740 conditions, 7602 events. 4190/7602 cut-off events. For 61935/62483 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 56203 event pairs, 2115 based on Foata normal form. 609/8201 useless extension candidates. Maximal degree in co-relation 51691. Up to 3333 conditions per place. [2023-08-30 11:29:05,864 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 220 selfloop transitions, 33 changer transitions 5/260 dead transitions. [2023-08-30 11:29:05,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 260 transitions, 3498 flow [2023-08-30 11:29:05,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 11:29:05,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 11:29:05,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1167 transitions. [2023-08-30 11:29:05,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3374783111625217 [2023-08-30 11:29:05,866 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1167 transitions. [2023-08-30 11:29:05,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1167 transitions. [2023-08-30 11:29:05,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:05,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1167 transitions. [2023-08-30 11:29:05,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 83.35714285714286) internal successors, (1167), 14 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:05,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 247.0) internal successors, (3705), 15 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:05,869 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 247.0) internal successors, (3705), 15 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:05,869 INFO L175 Difference]: Start difference. First operand has 176 places, 92 transitions, 1083 flow. Second operand 14 states and 1167 transitions. [2023-08-30 11:29:05,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 260 transitions, 3498 flow [2023-08-30 11:29:05,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 260 transitions, 3329 flow, removed 16 selfloop flow, removed 12 redundant places. [2023-08-30 11:29:05,926 INFO L231 Difference]: Finished difference. Result has 177 places, 91 transitions, 1070 flow [2023-08-30 11:29:05,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1070, PETRI_PLACES=177, PETRI_TRANSITIONS=91} [2023-08-30 11:29:05,927 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 140 predicate places. [2023-08-30 11:29:05,927 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 91 transitions, 1070 flow [2023-08-30 11:29:05,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 78.13888888888889) internal successors, (2813), 36 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:05,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:05,928 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2023-08-30 11:29:05,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-08-30 11:29:06,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:06,129 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:06,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:06,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1900314435, now seen corresponding path program 4 times [2023-08-30 11:29:06,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:06,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381118013] [2023-08-30 11:29:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:06,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:06,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:06,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381118013] [2023-08-30 11:29:06,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381118013] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:06,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092003381] [2023-08-30 11:29:06,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:29:06,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:06,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:06,544 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:29:06,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-30 11:29:06,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:29:06,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:29:06,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 11:29:06,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:06,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:29:06,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:06,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:29:06,963 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:06,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:07,118 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:07,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-08-30 11:29:07,125 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:07,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2023-08-30 11:29:07,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-08-30 11:29:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:07,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092003381] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:07,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:07,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-30 11:29:07,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100541109] [2023-08-30 11:29:07,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:07,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 11:29:07,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:07,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 11:29:07,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1146, Unknown=3, NotChecked=0, Total=1260 [2023-08-30 11:29:07,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 247 [2023-08-30 11:29:07,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 91 transitions, 1070 flow. Second operand has 36 states, 36 states have (on average 83.11111111111111) internal successors, (2992), 36 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:07,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:07,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 247 [2023-08-30 11:29:07,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:09,104 INFO L130 PetriNetUnfolder]: 4158/7519 cut-off events. [2023-08-30 11:29:09,104 INFO L131 PetriNetUnfolder]: For 59521/60060 co-relation queries the response was YES. [2023-08-30 11:29:09,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50722 conditions, 7519 events. 4158/7519 cut-off events. For 59521/60060 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 53860 event pairs, 2951 based on Foata normal form. 538/8054 useless extension candidates. Maximal degree in co-relation 50675. Up to 4140 conditions per place. [2023-08-30 11:29:09,162 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 129 selfloop transitions, 30 changer transitions 0/161 dead transitions. [2023-08-30 11:29:09,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 161 transitions, 2134 flow [2023-08-30 11:29:09,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 11:29:09,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 11:29:09,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1555 transitions. [2023-08-30 11:29:09,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3497525865946919 [2023-08-30 11:29:09,164 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1555 transitions. [2023-08-30 11:29:09,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1555 transitions. [2023-08-30 11:29:09,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:09,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1555 transitions. [2023-08-30 11:29:09,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 86.38888888888889) internal successors, (1555), 18 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:09,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:09,169 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:09,169 INFO L175 Difference]: Start difference. First operand has 177 places, 91 transitions, 1070 flow. Second operand 18 states and 1555 transitions. [2023-08-30 11:29:09,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 161 transitions, 2134 flow [2023-08-30 11:29:09,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 161 transitions, 2054 flow, removed 4 selfloop flow, removed 12 redundant places. [2023-08-30 11:29:09,228 INFO L231 Difference]: Finished difference. Result has 188 places, 102 transitions, 1193 flow [2023-08-30 11:29:09,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=998, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1193, PETRI_PLACES=188, PETRI_TRANSITIONS=102} [2023-08-30 11:29:09,229 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 151 predicate places. [2023-08-30 11:29:09,229 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 102 transitions, 1193 flow [2023-08-30 11:29:09,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 83.11111111111111) internal successors, (2992), 36 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:09,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:09,229 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2023-08-30 11:29:09,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-08-30 11:29:09,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-30 11:29:09,430 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:09,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:09,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1900314436, now seen corresponding path program 5 times [2023-08-30 11:29:09,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:09,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229482738] [2023-08-30 11:29:09,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:09,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:09,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:09,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229482738] [2023-08-30 11:29:09,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229482738] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:09,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855500244] [2023-08-30 11:29:09,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:29:09,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:09,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:09,823 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:29:09,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-30 11:29:10,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 11:29:10,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:29:10,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 11:29:10,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:10,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:29:10,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:10,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:29:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:10,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:10,418 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:10,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-08-30 11:29:10,423 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:10,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2023-08-30 11:29:10,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-08-30 11:29:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:10,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855500244] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:10,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:10,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-30 11:29:10,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689199800] [2023-08-30 11:29:10,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:10,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 11:29:10,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:10,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 11:29:10,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1147, Unknown=2, NotChecked=0, Total=1260 [2023-08-30 11:29:11,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 247 [2023-08-30 11:29:11,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 102 transitions, 1193 flow. Second operand has 36 states, 36 states have (on average 93.11111111111111) internal successors, (3352), 36 states have internal predecessors, (3352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:11,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:11,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 247 [2023-08-30 11:29:11,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:13,444 INFO L130 PetriNetUnfolder]: 4127/7420 cut-off events. [2023-08-30 11:29:13,444 INFO L131 PetriNetUnfolder]: For 54462/55010 co-relation queries the response was YES. [2023-08-30 11:29:13,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49655 conditions, 7420 events. 4127/7420 cut-off events. For 54462/55010 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 52693 event pairs, 3184 based on Foata normal form. 543/7957 useless extension candidates. Maximal degree in co-relation 49603. Up to 4048 conditions per place. [2023-08-30 11:29:13,493 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 128 selfloop transitions, 29 changer transitions 0/159 dead transitions. [2023-08-30 11:29:13,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 159 transitions, 2127 flow [2023-08-30 11:29:13,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 11:29:13,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 11:29:13,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1734 transitions. [2023-08-30 11:29:13,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3900134952766532 [2023-08-30 11:29:13,495 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1734 transitions. [2023-08-30 11:29:13,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1734 transitions. [2023-08-30 11:29:13,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:13,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1734 transitions. [2023-08-30 11:29:13,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 96.33333333333333) internal successors, (1734), 18 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:13,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:13,499 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:13,499 INFO L175 Difference]: Start difference. First operand has 188 places, 102 transitions, 1193 flow. Second operand 18 states and 1734 transitions. [2023-08-30 11:29:13,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 159 transitions, 2127 flow [2023-08-30 11:29:13,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 159 transitions, 2075 flow, removed 10 selfloop flow, removed 8 redundant places. [2023-08-30 11:29:13,555 INFO L231 Difference]: Finished difference. Result has 197 places, 100 transitions, 1178 flow [2023-08-30 11:29:13,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1120, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1178, PETRI_PLACES=197, PETRI_TRANSITIONS=100} [2023-08-30 11:29:13,555 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 160 predicate places. [2023-08-30 11:29:13,556 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 100 transitions, 1178 flow [2023-08-30 11:29:13,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 93.11111111111111) internal successors, (3352), 36 states have internal predecessors, (3352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:13,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:13,556 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:29:13,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-30 11:29:13,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:13,757 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:13,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:13,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1941740327, now seen corresponding path program 6 times [2023-08-30 11:29:13,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:13,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908623816] [2023-08-30 11:29:13,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:13,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:13,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:13,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908623816] [2023-08-30 11:29:13,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908623816] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:13,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434801335] [2023-08-30 11:29:13,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:29:13,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:13,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:13,909 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:29:13,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-30 11:29:14,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 11:29:14,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:29:14,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 11:29:14,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:14,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:14,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434801335] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:14,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:14,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-30 11:29:14,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235404708] [2023-08-30 11:29:14,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:14,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 11:29:14,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:14,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 11:29:14,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-08-30 11:29:14,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 11:29:14,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 100 transitions, 1178 flow. Second operand has 29 states, 29 states have (on average 95.20689655172414) internal successors, (2761), 29 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:14,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:14,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 11:29:14,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:15,624 INFO L130 PetriNetUnfolder]: 3217/5872 cut-off events. [2023-08-30 11:29:15,624 INFO L131 PetriNetUnfolder]: For 40494/40536 co-relation queries the response was YES. [2023-08-30 11:29:15,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38700 conditions, 5872 events. 3217/5872 cut-off events. For 40494/40536 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 40098 event pairs, 1683 based on Foata normal form. 148/6020 useless extension candidates. Maximal degree in co-relation 38649. Up to 3410 conditions per place. [2023-08-30 11:29:15,664 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 66 selfloop transitions, 10 changer transitions 171/249 dead transitions. [2023-08-30 11:29:15,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 249 transitions, 3026 flow [2023-08-30 11:29:15,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 11:29:15,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 11:29:15,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1800 transitions. [2023-08-30 11:29:15,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4048582995951417 [2023-08-30 11:29:15,667 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1800 transitions. [2023-08-30 11:29:15,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1800 transitions. [2023-08-30 11:29:15,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:15,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1800 transitions. [2023-08-30 11:29:15,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 100.0) internal successors, (1800), 18 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:15,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:15,672 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:15,672 INFO L175 Difference]: Start difference. First operand has 197 places, 100 transitions, 1178 flow. Second operand 18 states and 1800 transitions. [2023-08-30 11:29:15,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 249 transitions, 3026 flow [2023-08-30 11:29:15,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 249 transitions, 2883 flow, removed 29 selfloop flow, removed 18 redundant places. [2023-08-30 11:29:15,711 INFO L231 Difference]: Finished difference. Result has 196 places, 66 transitions, 748 flow [2023-08-30 11:29:15,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=748, PETRI_PLACES=196, PETRI_TRANSITIONS=66} [2023-08-30 11:29:15,711 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 159 predicate places. [2023-08-30 11:29:15,711 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 66 transitions, 748 flow [2023-08-30 11:29:15,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 95.20689655172414) internal successors, (2761), 29 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:15,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:15,712 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 11:29:15,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-30 11:29:15,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-30 11:29:15,913 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:15,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:15,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1211485282, now seen corresponding path program 4 times [2023-08-30 11:29:15,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:15,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841235836] [2023-08-30 11:29:15,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:15,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:16,375 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:16,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:16,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841235836] [2023-08-30 11:29:16,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841235836] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:16,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945006226] [2023-08-30 11:29:16,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:29:16,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:16,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:16,377 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:29:16,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-30 11:29:16,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:29:16,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:29:16,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 11:29:16,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:16,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:29:16,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:16,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:29:16,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:16,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:29:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:16,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:17,014 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1585 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1585) c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 12)) 9223372039002259456))) is different from false [2023-08-30 11:29:17,018 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1585 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1585) c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 16)) 9223372039002259456))) is different from false [2023-08-30 11:29:17,022 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1585 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1585) c_~A~0.base) (+ c_~A~0.offset 16)) 9223372039002259456))) is different from false [2023-08-30 11:29:17,070 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:17,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 11:29:17,078 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:17,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 75 [2023-08-30 11:29:17,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2023-08-30 11:29:17,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-08-30 11:29:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-08-30 11:29:17,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945006226] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:17,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:17,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-30 11:29:17,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714428483] [2023-08-30 11:29:17,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:17,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 11:29:17,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:17,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 11:29:17,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1289, Unknown=7, NotChecked=222, Total=1640 [2023-08-30 11:29:17,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:29:17,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 66 transitions, 748 flow. Second operand has 41 states, 41 states have (on average 78.09756097560975) internal successors, (3202), 41 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:17,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:17,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:29:17,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:18,896 INFO L130 PetriNetUnfolder]: 2497/4541 cut-off events. [2023-08-30 11:29:18,896 INFO L131 PetriNetUnfolder]: For 33370/33690 co-relation queries the response was YES. [2023-08-30 11:29:18,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30948 conditions, 4541 events. 2497/4541 cut-off events. For 33370/33690 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 31078 event pairs, 1117 based on Foata normal form. 381/4922 useless extension candidates. Maximal degree in co-relation 30897. Up to 1502 conditions per place. [2023-08-30 11:29:18,930 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 187 selfloop transitions, 24 changer transitions 0/212 dead transitions. [2023-08-30 11:29:18,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 212 transitions, 2749 flow [2023-08-30 11:29:18,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 11:29:18,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 11:29:18,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1335 transitions. [2023-08-30 11:29:18,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33780364372469635 [2023-08-30 11:29:18,932 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1335 transitions. [2023-08-30 11:29:18,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1335 transitions. [2023-08-30 11:29:18,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:18,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1335 transitions. [2023-08-30 11:29:18,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 83.4375) internal successors, (1335), 16 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:18,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 247.0) internal successors, (4199), 17 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:18,935 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 247.0) internal successors, (4199), 17 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:18,935 INFO L175 Difference]: Start difference. First operand has 196 places, 66 transitions, 748 flow. Second operand 16 states and 1335 transitions. [2023-08-30 11:29:18,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 212 transitions, 2749 flow [2023-08-30 11:29:19,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 212 transitions, 2589 flow, removed 37 selfloop flow, removed 21 redundant places. [2023-08-30 11:29:19,013 INFO L231 Difference]: Finished difference. Result has 168 places, 67 transitions, 754 flow [2023-08-30 11:29:19,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=754, PETRI_PLACES=168, PETRI_TRANSITIONS=67} [2023-08-30 11:29:19,013 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 131 predicate places. [2023-08-30 11:29:19,013 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 67 transitions, 754 flow [2023-08-30 11:29:19,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 78.09756097560975) internal successors, (3202), 41 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:19,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:19,014 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 11:29:19,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-08-30 11:29:19,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-30 11:29:19,214 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:19,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:19,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1211485283, now seen corresponding path program 5 times [2023-08-30 11:29:19,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:19,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575659555] [2023-08-30 11:29:19,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:19,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:19,711 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:19,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:19,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575659555] [2023-08-30 11:29:19,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575659555] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:19,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724359476] [2023-08-30 11:29:19,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:29:19,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:19,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:19,714 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:29:19,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-30 11:29:19,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 11:29:19,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:29:19,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-30 11:29:19,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:20,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:29:20,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:20,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:29:20,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:20,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:29:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:20,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:20,512 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:20,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 11:29:20,519 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:20,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 129 [2023-08-30 11:29:20,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 11:29:20,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-30 11:29:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:20,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724359476] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:20,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:20,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-30 11:29:20,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028050357] [2023-08-30 11:29:20,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:20,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 11:29:20,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:20,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 11:29:20,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1490, Unknown=19, NotChecked=0, Total=1640 [2023-08-30 11:29:21,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:29:21,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 67 transitions, 754 flow. Second operand has 41 states, 41 states have (on average 78.09756097560975) internal successors, (3202), 41 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:21,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:21,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:29:21,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:22,873 INFO L130 PetriNetUnfolder]: 2406/4385 cut-off events. [2023-08-30 11:29:22,873 INFO L131 PetriNetUnfolder]: For 30255/30579 co-relation queries the response was YES. [2023-08-30 11:29:22,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29742 conditions, 4385 events. 2406/4385 cut-off events. For 30255/30579 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 29784 event pairs, 991 based on Foata normal form. 385/4770 useless extension candidates. Maximal degree in co-relation 29697. Up to 1502 conditions per place. [2023-08-30 11:29:22,905 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 186 selfloop transitions, 24 changer transitions 0/211 dead transitions. [2023-08-30 11:29:22,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 211 transitions, 2633 flow [2023-08-30 11:29:22,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 11:29:22,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 11:29:22,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1334 transitions. [2023-08-30 11:29:22,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3375506072874494 [2023-08-30 11:29:22,907 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1334 transitions. [2023-08-30 11:29:22,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1334 transitions. [2023-08-30 11:29:22,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:22,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1334 transitions. [2023-08-30 11:29:22,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 83.375) internal successors, (1334), 16 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:22,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 247.0) internal successors, (4199), 17 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:22,910 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 247.0) internal successors, (4199), 17 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:22,910 INFO L175 Difference]: Start difference. First operand has 168 places, 67 transitions, 754 flow. Second operand 16 states and 1334 transitions. [2023-08-30 11:29:22,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 211 transitions, 2633 flow [2023-08-30 11:29:22,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 211 transitions, 2572 flow, removed 2 selfloop flow, removed 15 redundant places. [2023-08-30 11:29:22,936 INFO L231 Difference]: Finished difference. Result has 168 places, 66 transitions, 722 flow [2023-08-30 11:29:22,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=722, PETRI_PLACES=168, PETRI_TRANSITIONS=66} [2023-08-30 11:29:22,936 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 131 predicate places. [2023-08-30 11:29:22,937 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 66 transitions, 722 flow [2023-08-30 11:29:22,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 78.09756097560975) internal successors, (3202), 41 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:22,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:22,937 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:29:22,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-30 11:29:23,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-30 11:29:23,138 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:23,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:23,138 INFO L85 PathProgramCache]: Analyzing trace with hash 2062492920, now seen corresponding path program 4 times [2023-08-30 11:29:23,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:23,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563732805] [2023-08-30 11:29:23,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:23,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:23,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:23,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563732805] [2023-08-30 11:29:23,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563732805] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:23,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022620028] [2023-08-30 11:29:23,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:29:23,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:23,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:23,527 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:29:23,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-30 11:29:23,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:29:23,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:29:23,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 11:29:23,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:23,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:29:23,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:23,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 11:29:23,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:23,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:29:23,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:23,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:29:23,996 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:23,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:24,087 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1687 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1687) c_~A~0.base) (+ c_~A~0.offset 12)) 4294967296))) is different from false [2023-08-30 11:29:24,189 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 11:29:24,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 42 [2023-08-30 11:29:24,196 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:24,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 75 [2023-08-30 11:29:24,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2023-08-30 11:29:24,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-08-30 11:29:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:24,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022620028] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:24,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:24,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-30 11:29:24,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649349844] [2023-08-30 11:29:24,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:24,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 11:29:24,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:24,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 11:29:24,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1067, Unknown=10, NotChecked=66, Total=1260 [2023-08-30 11:29:24,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:29:24,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 66 transitions, 722 flow. Second operand has 36 states, 36 states have (on average 78.19444444444444) internal successors, (2815), 36 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:24,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:24,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:29:24,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:25,533 INFO L130 PetriNetUnfolder]: 2348/4320 cut-off events. [2023-08-30 11:29:25,533 INFO L131 PetriNetUnfolder]: For 24226/24226 co-relation queries the response was YES. [2023-08-30 11:29:25,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28873 conditions, 4320 events. 2348/4320 cut-off events. For 24226/24226 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 28701 event pairs, 1040 based on Foata normal form. 64/4384 useless extension candidates. Maximal degree in co-relation 28830. Up to 2341 conditions per place. [2023-08-30 11:29:25,564 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 152 selfloop transitions, 14 changer transitions 0/168 dead transitions. [2023-08-30 11:29:25,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 168 transitions, 2342 flow [2023-08-30 11:29:25,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 11:29:25,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 11:29:25,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1159 transitions. [2023-08-30 11:29:25,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33516483516483514 [2023-08-30 11:29:25,566 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1159 transitions. [2023-08-30 11:29:25,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1159 transitions. [2023-08-30 11:29:25,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:25,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1159 transitions. [2023-08-30 11:29:25,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 82.78571428571429) internal successors, (1159), 14 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:25,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 247.0) internal successors, (3705), 15 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:25,569 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 247.0) internal successors, (3705), 15 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:25,569 INFO L175 Difference]: Start difference. First operand has 168 places, 66 transitions, 722 flow. Second operand 14 states and 1159 transitions. [2023-08-30 11:29:25,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 168 transitions, 2342 flow [2023-08-30 11:29:25,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 168 transitions, 2184 flow, removed 8 selfloop flow, removed 16 redundant places. [2023-08-30 11:29:25,597 INFO L231 Difference]: Finished difference. Result has 165 places, 65 transitions, 678 flow [2023-08-30 11:29:25,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=650, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=678, PETRI_PLACES=165, PETRI_TRANSITIONS=65} [2023-08-30 11:29:25,598 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 128 predicate places. [2023-08-30 11:29:25,598 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 65 transitions, 678 flow [2023-08-30 11:29:25,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 78.19444444444444) internal successors, (2815), 36 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:25,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:25,598 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2023-08-30 11:29:25,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-08-30 11:29:25,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-30 11:29:25,799 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:25,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:25,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1219796972, now seen corresponding path program 5 times [2023-08-30 11:29:25,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:25,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067021841] [2023-08-30 11:29:25,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:25,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:25,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:25,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067021841] [2023-08-30 11:29:25,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067021841] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:25,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270224793] [2023-08-30 11:29:25,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:29:25,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:25,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:25,988 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:29:25,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-30 11:29:26,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 11:29:26,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:29:26,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 11:29:26,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:26,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:26,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270224793] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:26,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:26,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2023-08-30 11:29:26,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578697476] [2023-08-30 11:29:26,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:26,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 11:29:26,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:26,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 11:29:26,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=836, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 11:29:26,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 11:29:26,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 65 transitions, 678 flow. Second operand has 34 states, 34 states have (on average 95.11764705882354) internal successors, (3234), 34 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:26,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:26,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 11:29:26,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:27,941 INFO L130 PetriNetUnfolder]: 3724/6733 cut-off events. [2023-08-30 11:29:27,942 INFO L131 PetriNetUnfolder]: For 41641/42077 co-relation queries the response was YES. [2023-08-30 11:29:27,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42315 conditions, 6733 events. 3724/6733 cut-off events. For 41641/42077 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 49417 event pairs, 1114 based on Foata normal form. 644/7377 useless extension candidates. Maximal degree in co-relation 42274. Up to 2380 conditions per place. [2023-08-30 11:29:27,987 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 257 selfloop transitions, 30 changer transitions 52/340 dead transitions. [2023-08-30 11:29:27,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 340 transitions, 3973 flow [2023-08-30 11:29:27,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 11:29:27,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 11:29:27,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2132 transitions. [2023-08-30 11:29:27,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41102756892230574 [2023-08-30 11:29:27,990 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2132 transitions. [2023-08-30 11:29:27,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2132 transitions. [2023-08-30 11:29:27,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:27,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2132 transitions. [2023-08-30 11:29:27,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 101.52380952380952) internal successors, (2132), 21 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:27,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 247.0) internal successors, (5434), 22 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:27,996 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 247.0) internal successors, (5434), 22 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:27,997 INFO L175 Difference]: Start difference. First operand has 165 places, 65 transitions, 678 flow. Second operand 21 states and 2132 transitions. [2023-08-30 11:29:27,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 340 transitions, 3973 flow [2023-08-30 11:29:28,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 340 transitions, 3802 flow, removed 14 selfloop flow, removed 11 redundant places. [2023-08-30 11:29:28,044 INFO L231 Difference]: Finished difference. Result has 186 places, 86 transitions, 1029 flow [2023-08-30 11:29:28,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1029, PETRI_PLACES=186, PETRI_TRANSITIONS=86} [2023-08-30 11:29:28,045 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 149 predicate places. [2023-08-30 11:29:28,045 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 86 transitions, 1029 flow [2023-08-30 11:29:28,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 95.11764705882354) internal successors, (3234), 34 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:28,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:28,046 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:29:28,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-30 11:29:28,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-30 11:29:28,252 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:28,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:28,252 INFO L85 PathProgramCache]: Analyzing trace with hash -487226492, now seen corresponding path program 7 times [2023-08-30 11:29:28,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:28,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063796701] [2023-08-30 11:29:28,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:28,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:28,668 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:28,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:28,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063796701] [2023-08-30 11:29:28,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063796701] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:28,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822194230] [2023-08-30 11:29:28,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:29:28,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:28,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:28,670 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:29:28,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-30 11:29:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:28,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 11:29:28,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:29,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:29:29,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:29,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:29:29,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:29,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:29:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:29,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:29,288 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1779 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1779) c_~A~0.base) (+ c_~A~0.offset 16)) 9223372039002259456)) is different from false [2023-08-30 11:29:29,334 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:29,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 11:29:29,339 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:29,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 129 [2023-08-30 11:29:29,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-30 11:29:29,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 11:29:29,489 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:29,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822194230] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:29,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:29,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-08-30 11:29:29,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617138295] [2023-08-30 11:29:29,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:29,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 11:29:29,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:29,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 11:29:29,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1282, Unknown=6, NotChecked=72, Total=1482 [2023-08-30 11:29:29,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:29:29,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 86 transitions, 1029 flow. Second operand has 39 states, 39 states have (on average 78.17948717948718) internal successors, (3049), 39 states have internal predecessors, (3049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:29,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:29,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:29:29,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:31,164 INFO L130 PetriNetUnfolder]: 3582/6526 cut-off events. [2023-08-30 11:29:31,164 INFO L131 PetriNetUnfolder]: For 48489/48766 co-relation queries the response was YES. [2023-08-30 11:29:31,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42656 conditions, 6526 events. 3582/6526 cut-off events. For 48489/48766 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 46244 event pairs, 1416 based on Foata normal form. 373/6895 useless extension candidates. Maximal degree in co-relation 42604. Up to 3033 conditions per place. [2023-08-30 11:29:31,219 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 253 selfloop transitions, 17 changer transitions 0/274 dead transitions. [2023-08-30 11:29:31,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 274 transitions, 4025 flow [2023-08-30 11:29:31,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 11:29:31,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 11:29:31,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1325 transitions. [2023-08-30 11:29:31,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3352732793522267 [2023-08-30 11:29:31,221 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1325 transitions. [2023-08-30 11:29:31,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1325 transitions. [2023-08-30 11:29:31,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:31,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1325 transitions. [2023-08-30 11:29:31,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 82.8125) internal successors, (1325), 16 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:31,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 247.0) internal successors, (4199), 17 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:31,225 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 247.0) internal successors, (4199), 17 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:31,226 INFO L175 Difference]: Start difference. First operand has 186 places, 86 transitions, 1029 flow. Second operand 16 states and 1325 transitions. [2023-08-30 11:29:31,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 274 transitions, 4025 flow [2023-08-30 11:29:31,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 274 transitions, 3883 flow, removed 66 selfloop flow, removed 6 redundant places. [2023-08-30 11:29:31,281 INFO L231 Difference]: Finished difference. Result has 197 places, 87 transitions, 1036 flow [2023-08-30 11:29:31,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1036, PETRI_PLACES=197, PETRI_TRANSITIONS=87} [2023-08-30 11:29:31,282 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 160 predicate places. [2023-08-30 11:29:31,282 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 87 transitions, 1036 flow [2023-08-30 11:29:31,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 78.17948717948718) internal successors, (3049), 39 states have internal predecessors, (3049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:31,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:31,282 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2023-08-30 11:29:31,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-30 11:29:31,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:31,483 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:31,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:31,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1620656489, now seen corresponding path program 6 times [2023-08-30 11:29:31,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:31,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212885185] [2023-08-30 11:29:31,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:31,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:31,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:31,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212885185] [2023-08-30 11:29:31,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212885185] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:31,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8986680] [2023-08-30 11:29:31,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:29:31,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:31,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:31,934 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:29:31,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-30 11:29:32,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 11:29:32,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:29:32,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 11:29:32,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:32,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 11:29:32,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:32,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:29:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:32,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:33,006 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:33,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-08-30 11:29:33,013 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:33,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 33 [2023-08-30 11:29:33,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-08-30 11:29:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:33,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8986680] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:33,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:33,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-08-30 11:29:33,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778752017] [2023-08-30 11:29:33,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:33,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 11:29:33,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:33,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 11:29:33,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2023-08-30 11:29:37,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 247 [2023-08-30 11:29:37,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 87 transitions, 1036 flow. Second operand has 44 states, 44 states have (on average 85.0909090909091) internal successors, (3744), 44 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:37,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:37,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 247 [2023-08-30 11:29:37,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:38,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 11:29:47,702 INFO L130 PetriNetUnfolder]: 7394/13498 cut-off events. [2023-08-30 11:29:47,702 INFO L131 PetriNetUnfolder]: For 109714/110696 co-relation queries the response was YES. [2023-08-30 11:29:47,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92427 conditions, 13498 events. 7394/13498 cut-off events. For 109714/110696 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 109833 event pairs, 3195 based on Foata normal form. 1043/14540 useless extension candidates. Maximal degree in co-relation 92373. Up to 2980 conditions per place. [2023-08-30 11:29:47,822 INFO L137 encePairwiseOnDemand]: 237/247 looper letters, 338 selfloop transitions, 157 changer transitions 32/528 dead transitions. [2023-08-30 11:29:47,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 528 transitions, 6786 flow [2023-08-30 11:29:47,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-08-30 11:29:47,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2023-08-30 11:29:47,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 6864 transitions. [2023-08-30 11:29:47,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3562753036437247 [2023-08-30 11:29:47,833 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 6864 transitions. [2023-08-30 11:29:47,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 6864 transitions. [2023-08-30 11:29:47,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:47,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 6864 transitions. [2023-08-30 11:29:47,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 88.0) internal successors, (6864), 78 states have internal predecessors, (6864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:47,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 247.0) internal successors, (19513), 79 states have internal predecessors, (19513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:47,865 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 247.0) internal successors, (19513), 79 states have internal predecessors, (19513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:47,865 INFO L175 Difference]: Start difference. First operand has 197 places, 87 transitions, 1036 flow. Second operand 78 states and 6864 transitions. [2023-08-30 11:29:47,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 528 transitions, 6786 flow [2023-08-30 11:29:48,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 528 transitions, 6559 flow, removed 13 selfloop flow, removed 13 redundant places. [2023-08-30 11:29:48,035 INFO L231 Difference]: Finished difference. Result has 277 places, 210 transitions, 2808 flow [2023-08-30 11:29:48,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=2808, PETRI_PLACES=277, PETRI_TRANSITIONS=210} [2023-08-30 11:29:48,036 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 240 predicate places. [2023-08-30 11:29:48,036 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 210 transitions, 2808 flow [2023-08-30 11:29:48,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 85.0909090909091) internal successors, (3744), 44 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:48,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:48,036 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:29:48,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-30 11:29:48,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-08-30 11:29:48,237 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:48,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:48,237 INFO L85 PathProgramCache]: Analyzing trace with hash -487226491, now seen corresponding path program 5 times [2023-08-30 11:29:48,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:48,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713730378] [2023-08-30 11:29:48,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:48,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:48,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:48,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713730378] [2023-08-30 11:29:48,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713730378] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:48,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786688299] [2023-08-30 11:29:48,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:29:48,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:48,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:48,689 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:29:48,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-30 11:29:48,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 11:29:48,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:29:48,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 11:29:48,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:49,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:29:49,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:49,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:29:49,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:49,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:29:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:49,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:49,378 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1878 (Array Int Int)) (v_ArrVal_1877 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1877) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1878) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 16 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296))) is different from false [2023-08-30 11:29:49,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:49,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 11:29:49,395 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:49,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 147 [2023-08-30 11:29:49,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2023-08-30 11:29:49,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-08-30 11:29:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-08-30 11:29:49,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786688299] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:49,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:49,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-08-30 11:29:49,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250418653] [2023-08-30 11:29:49,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:49,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 11:29:49,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:49,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 11:29:49,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1281, Unknown=6, NotChecked=72, Total=1482 [2023-08-30 11:29:49,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:29:49,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 210 transitions, 2808 flow. Second operand has 39 states, 39 states have (on average 78.17948717948718) internal successors, (3049), 39 states have internal predecessors, (3049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:49,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:49,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:29:49,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:52,421 INFO L130 PetriNetUnfolder]: 7258/13274 cut-off events. [2023-08-30 11:29:52,421 INFO L131 PetriNetUnfolder]: For 117266/117427 co-relation queries the response was YES. [2023-08-30 11:29:52,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93700 conditions, 13274 events. 7258/13274 cut-off events. For 117266/117427 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 106707 event pairs, 2726 based on Foata normal form. 373/13645 useless extension candidates. Maximal degree in co-relation 93631. Up to 6380 conditions per place. [2023-08-30 11:29:52,539 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 537 selfloop transitions, 19 changer transitions 0/562 dead transitions. [2023-08-30 11:29:52,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 562 transitions, 9655 flow [2023-08-30 11:29:52,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 11:29:52,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 11:29:52,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1324 transitions. [2023-08-30 11:29:52,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3350202429149798 [2023-08-30 11:29:52,541 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1324 transitions. [2023-08-30 11:29:52,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1324 transitions. [2023-08-30 11:29:52,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:52,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1324 transitions. [2023-08-30 11:29:52,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 82.75) internal successors, (1324), 16 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:52,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 247.0) internal successors, (4199), 17 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:52,544 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 247.0) internal successors, (4199), 17 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:52,544 INFO L175 Difference]: Start difference. First operand has 277 places, 210 transitions, 2808 flow. Second operand 16 states and 1324 transitions. [2023-08-30 11:29:52,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 562 transitions, 9655 flow [2023-08-30 11:29:52,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 562 transitions, 9162 flow, removed 184 selfloop flow, removed 18 redundant places. [2023-08-30 11:29:52,707 INFO L231 Difference]: Finished difference. Result has 274 places, 209 transitions, 2570 flow [2023-08-30 11:29:52,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2532, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2570, PETRI_PLACES=274, PETRI_TRANSITIONS=209} [2023-08-30 11:29:52,708 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 237 predicate places. [2023-08-30 11:29:52,708 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 209 transitions, 2570 flow [2023-08-30 11:29:52,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 78.17948717948718) internal successors, (3049), 39 states have internal predecessors, (3049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:52,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:52,708 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2023-08-30 11:29:52,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-30 11:29:52,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:52,909 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:52,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:52,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1620656490, now seen corresponding path program 6 times [2023-08-30 11:29:52,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:52,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318041213] [2023-08-30 11:29:52,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:52,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:53,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:53,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318041213] [2023-08-30 11:29:53,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318041213] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:53,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378300346] [2023-08-30 11:29:53,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:29:53,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:53,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:53,525 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:29:53,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-30 11:29:53,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 11:29:53,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:29:53,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-30 11:29:53,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:53,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:29:53,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:53,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:29:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:54,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:54,239 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1927 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1927) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 20 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2023-08-30 11:29:54,246 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:54,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-08-30 11:29:54,251 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:54,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2023-08-30 11:29:54,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-08-30 11:29:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-08-30 11:29:54,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378300346] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:54,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:54,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-08-30 11:29:54,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803351603] [2023-08-30 11:29:54,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:54,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-30 11:29:54,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:54,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-30 11:29:54,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1514, Unknown=1, NotChecked=78, Total=1722 [2023-08-30 11:29:54,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 11:29:54,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 209 transitions, 2570 flow. Second operand has 42 states, 42 states have (on average 81.0952380952381) internal successors, (3406), 42 states have internal predecessors, (3406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:54,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:54,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 11:29:54,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:29:57,215 INFO L130 PetriNetUnfolder]: 7074/12845 cut-off events. [2023-08-30 11:29:57,215 INFO L131 PetriNetUnfolder]: For 110002/110812 co-relation queries the response was YES. [2023-08-30 11:29:57,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90918 conditions, 12845 events. 7074/12845 cut-off events. For 110002/110812 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 101049 event pairs, 5327 based on Foata normal form. 813/13654 useless extension candidates. Maximal degree in co-relation 90853. Up to 7596 conditions per place. [2023-08-30 11:29:57,311 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 160 selfloop transitions, 83 changer transitions 4/248 dead transitions. [2023-08-30 11:29:57,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 248 transitions, 3460 flow [2023-08-30 11:29:57,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 11:29:57,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 11:29:57,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1594 transitions. [2023-08-30 11:29:57,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33965480502876627 [2023-08-30 11:29:57,313 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1594 transitions. [2023-08-30 11:29:57,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1594 transitions. [2023-08-30 11:29:57,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:29:57,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1594 transitions. [2023-08-30 11:29:57,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 83.89473684210526) internal successors, (1594), 19 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:57,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 247.0) internal successors, (4940), 20 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:57,319 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 247.0) internal successors, (4940), 20 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:57,319 INFO L175 Difference]: Start difference. First operand has 274 places, 209 transitions, 2570 flow. Second operand 19 states and 1594 transitions. [2023-08-30 11:29:57,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 248 transitions, 3460 flow [2023-08-30 11:29:57,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 248 transitions, 3367 flow, removed 13 selfloop flow, removed 14 redundant places. [2023-08-30 11:29:57,486 INFO L231 Difference]: Finished difference. Result has 278 places, 208 transitions, 2652 flow [2023-08-30 11:29:57,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2486, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2652, PETRI_PLACES=278, PETRI_TRANSITIONS=208} [2023-08-30 11:29:57,487 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 241 predicate places. [2023-08-30 11:29:57,487 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 208 transitions, 2652 flow [2023-08-30 11:29:57,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 81.0952380952381) internal successors, (3406), 42 states have internal predecessors, (3406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:57,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:29:57,488 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 11:29:57,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-30 11:29:57,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-08-30 11:29:57,695 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:29:57,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:29:57,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1403941466, now seen corresponding path program 5 times [2023-08-30 11:29:57,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:29:57,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699497765] [2023-08-30 11:29:57,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:29:57,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:29:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:29:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:58,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:29:58,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699497765] [2023-08-30 11:29:58,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699497765] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:29:58,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893107150] [2023-08-30 11:29:58,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:29:58,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:29:58,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:29:58,370 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:29:58,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-30 11:29:58,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 11:29:58,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:29:58,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 11:29:58,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:29:58,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:29:58,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:58,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:29:58,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:29:58,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:29:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:58,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:29:59,142 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1981 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1981) c_~A~0.base) (+ c_~A~0.offset 20)) 9223372039002259456))) is different from false [2023-08-30 11:29:59,200 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:59,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 11:29:59,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:29:59,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 75 [2023-08-30 11:29:59,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2023-08-30 11:29:59,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-08-30 11:29:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:29:59,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893107150] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:29:59,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:29:59,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-30 11:29:59,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749567887] [2023-08-30 11:29:59,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:29:59,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 11:29:59,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:29:59,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 11:29:59,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1748, Unknown=6, NotChecked=84, Total=1980 [2023-08-30 11:29:59,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:29:59,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 208 transitions, 2652 flow. Second operand has 45 states, 45 states have (on average 78.11111111111111) internal successors, (3515), 45 states have internal predecessors, (3515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:29:59,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:29:59,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:29:59,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:02,680 INFO L130 PetriNetUnfolder]: 6910/12572 cut-off events. [2023-08-30 11:30:02,680 INFO L131 PetriNetUnfolder]: For 100412/101167 co-relation queries the response was YES. [2023-08-30 11:30:02,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86326 conditions, 12572 events. 6910/12572 cut-off events. For 100412/101167 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 100002 event pairs, 3711 based on Foata normal form. 865/13419 useless extension candidates. Maximal degree in co-relation 86262. Up to 4285 conditions per place. [2023-08-30 11:30:02,779 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 334 selfloop transitions, 51 changer transitions 4/390 dead transitions. [2023-08-30 11:30:02,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 390 transitions, 5324 flow [2023-08-30 11:30:02,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 11:30:02,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 11:30:02,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1516 transitions. [2023-08-30 11:30:02,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34098065677013045 [2023-08-30 11:30:02,781 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1516 transitions. [2023-08-30 11:30:02,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1516 transitions. [2023-08-30 11:30:02,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:02,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1516 transitions. [2023-08-30 11:30:02,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 84.22222222222223) internal successors, (1516), 18 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:02,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:02,784 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:02,784 INFO L175 Difference]: Start difference. First operand has 278 places, 208 transitions, 2652 flow. Second operand 18 states and 1516 transitions. [2023-08-30 11:30:02,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 390 transitions, 5324 flow [2023-08-30 11:30:03,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 390 transitions, 5146 flow, removed 2 selfloop flow, removed 16 redundant places. [2023-08-30 11:30:03,060 INFO L231 Difference]: Finished difference. Result has 281 places, 209 transitions, 2635 flow [2023-08-30 11:30:03,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2475, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2635, PETRI_PLACES=281, PETRI_TRANSITIONS=209} [2023-08-30 11:30:03,061 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 244 predicate places. [2023-08-30 11:30:03,061 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 209 transitions, 2635 flow [2023-08-30 11:30:03,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 78.11111111111111) internal successors, (3515), 45 states have internal predecessors, (3515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:03,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:03,062 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 11:30:03,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-30 11:30:03,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:03,269 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:30:03,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:03,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1403941467, now seen corresponding path program 6 times [2023-08-30 11:30:03,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:03,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094128860] [2023-08-30 11:30:03,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:03,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:03,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:03,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094128860] [2023-08-30 11:30:03,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094128860] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:30:03,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474123679] [2023-08-30 11:30:03,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:30:03,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:03,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:30:03,842 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:30:03,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-30 11:30:04,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 11:30:04,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:30:04,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 11:30:04,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:30:04,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:30:04,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:30:04,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:30:04,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:30:04,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:30:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:04,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:30:04,698 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2035 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2035) c_~A~0.base) (+ c_~A~0.offset 20)) 4294967296)) is different from false [2023-08-30 11:30:04,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:04,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 11:30:04,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:04,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 129 [2023-08-30 11:30:04,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 11:30:04,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-30 11:30:04,951 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:04,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474123679] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:30:04,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:30:04,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-30 11:30:04,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617147815] [2023-08-30 11:30:04,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:30:04,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 11:30:04,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:04,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 11:30:04,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1744, Unknown=10, NotChecked=84, Total=1980 [2023-08-30 11:30:05,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:30:05,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 209 transitions, 2635 flow. Second operand has 45 states, 45 states have (on average 78.11111111111111) internal successors, (3515), 45 states have internal predecessors, (3515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:05,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:05,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:30:05,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:08,296 INFO L130 PetriNetUnfolder]: 6746/12300 cut-off events. [2023-08-30 11:30:08,297 INFO L131 PetriNetUnfolder]: For 102437/103165 co-relation queries the response was YES. [2023-08-30 11:30:08,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84952 conditions, 12300 events. 6746/12300 cut-off events. For 102437/103165 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 97146 event pairs, 3645 based on Foata normal form. 838/13120 useless extension candidates. Maximal degree in co-relation 84886. Up to 4285 conditions per place. [2023-08-30 11:30:08,390 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 329 selfloop transitions, 55 changer transitions 4/389 dead transitions. [2023-08-30 11:30:08,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 389 transitions, 5256 flow [2023-08-30 11:30:08,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 11:30:08,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 11:30:08,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1515 transitions. [2023-08-30 11:30:08,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3407557354925776 [2023-08-30 11:30:08,391 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1515 transitions. [2023-08-30 11:30:08,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1515 transitions. [2023-08-30 11:30:08,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:08,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1515 transitions. [2023-08-30 11:30:08,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 84.16666666666667) internal successors, (1515), 18 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:08,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:08,395 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:08,395 INFO L175 Difference]: Start difference. First operand has 281 places, 209 transitions, 2635 flow. Second operand 18 states and 1515 transitions. [2023-08-30 11:30:08,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 389 transitions, 5256 flow [2023-08-30 11:30:08,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 389 transitions, 5111 flow, removed 5 selfloop flow, removed 15 redundant places. [2023-08-30 11:30:08,590 INFO L231 Difference]: Finished difference. Result has 283 places, 208 transitions, 2575 flow [2023-08-30 11:30:08,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2465, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2575, PETRI_PLACES=283, PETRI_TRANSITIONS=208} [2023-08-30 11:30:08,590 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 246 predicate places. [2023-08-30 11:30:08,590 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 208 transitions, 2575 flow [2023-08-30 11:30:08,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 78.11111111111111) internal successors, (3515), 45 states have internal predecessors, (3515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:08,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:08,591 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:30:08,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-30 11:30:08,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:08,792 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:30:08,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:08,792 INFO L85 PathProgramCache]: Analyzing trace with hash 2075850392, now seen corresponding path program 6 times [2023-08-30 11:30:08,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:08,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058125189] [2023-08-30 11:30:08,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:08,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:08,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:08,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058125189] [2023-08-30 11:30:08,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058125189] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:30:08,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804345181] [2023-08-30 11:30:08,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:30:08,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:08,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:30:08,985 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:30:08,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-30 11:30:09,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 11:30:09,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:30:09,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 11:30:09,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:30:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:09,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:30:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:09,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804345181] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:30:09,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:30:09,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2023-08-30 11:30:09,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026075637] [2023-08-30 11:30:09,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:30:09,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 11:30:09,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:09,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 11:30:09,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=836, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 11:30:09,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 11:30:09,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 208 transitions, 2575 flow. Second operand has 34 states, 34 states have (on average 95.17647058823529) internal successors, (3236), 34 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:09,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:09,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 11:30:09,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:11,959 INFO L130 PetriNetUnfolder]: 5542/10179 cut-off events. [2023-08-30 11:30:11,959 INFO L131 PetriNetUnfolder]: For 91594/91887 co-relation queries the response was YES. [2023-08-30 11:30:12,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69957 conditions, 10179 events. 5542/10179 cut-off events. For 91594/91887 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 77823 event pairs, 2415 based on Foata normal form. 503/10678 useless extension candidates. Maximal degree in co-relation 69893. Up to 5576 conditions per place. [2023-08-30 11:30:12,034 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 168 selfloop transitions, 11 changer transitions 329/512 dead transitions. [2023-08-30 11:30:12,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 512 transitions, 7200 flow [2023-08-30 11:30:12,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 11:30:12,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 11:30:12,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2087 transitions. [2023-08-30 11:30:12,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023520339309813 [2023-08-30 11:30:12,037 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2087 transitions. [2023-08-30 11:30:12,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2087 transitions. [2023-08-30 11:30:12,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:12,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2087 transitions. [2023-08-30 11:30:12,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 99.38095238095238) internal successors, (2087), 21 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:12,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 247.0) internal successors, (5434), 22 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:12,042 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 247.0) internal successors, (5434), 22 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:12,042 INFO L175 Difference]: Start difference. First operand has 283 places, 208 transitions, 2575 flow. Second operand 21 states and 2087 transitions. [2023-08-30 11:30:12,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 512 transitions, 7200 flow [2023-08-30 11:30:12,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 512 transitions, 7021 flow, removed 4 selfloop flow, removed 16 redundant places. [2023-08-30 11:30:12,158 INFO L231 Difference]: Finished difference. Result has 294 places, 161 transitions, 1956 flow [2023-08-30 11:30:12,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2456, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1956, PETRI_PLACES=294, PETRI_TRANSITIONS=161} [2023-08-30 11:30:12,159 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 257 predicate places. [2023-08-30 11:30:12,159 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 161 transitions, 1956 flow [2023-08-30 11:30:12,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 95.17647058823529) internal successors, (3236), 34 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:12,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:12,159 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2023-08-30 11:30:12,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-30 11:30:12,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-08-30 11:30:12,360 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:30:12,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:12,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1299258705, now seen corresponding path program 7 times [2023-08-30 11:30:12,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:12,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114517528] [2023-08-30 11:30:12,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:12,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:12,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:12,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114517528] [2023-08-30 11:30:12,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114517528] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:30:12,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055231568] [2023-08-30 11:30:12,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:30:12,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:12,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:30:12,593 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:30:12,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-30 11:30:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:12,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 11:30:12,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:30:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:13,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:30:13,244 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:13,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055231568] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:30:13,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:30:13,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2023-08-30 11:30:13,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704492906] [2023-08-30 11:30:13,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:30:13,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 11:30:13,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:13,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 11:30:13,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1111, Unknown=0, NotChecked=0, Total=1482 [2023-08-30 11:30:13,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 11:30:13,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 161 transitions, 1956 flow. Second operand has 39 states, 39 states have (on average 95.1025641025641) internal successors, (3709), 39 states have internal predecessors, (3709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:13,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:13,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 11:30:13,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:15,818 INFO L130 PetriNetUnfolder]: 5406/10048 cut-off events. [2023-08-30 11:30:15,818 INFO L131 PetriNetUnfolder]: For 103363/104049 co-relation queries the response was YES. [2023-08-30 11:30:15,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68064 conditions, 10048 events. 5406/10048 cut-off events. For 103363/104049 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 80810 event pairs, 2095 based on Foata normal form. 1343/11389 useless extension candidates. Maximal degree in co-relation 68002. Up to 3061 conditions per place. [2023-08-30 11:30:15,890 INFO L137 encePairwiseOnDemand]: 237/247 looper letters, 320 selfloop transitions, 64 changer transitions 60/445 dead transitions. [2023-08-30 11:30:15,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 445 transitions, 5672 flow [2023-08-30 11:30:15,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 11:30:15,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 11:30:15,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2436 transitions. [2023-08-30 11:30:15,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4109311740890688 [2023-08-30 11:30:15,892 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2436 transitions. [2023-08-30 11:30:15,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2436 transitions. [2023-08-30 11:30:15,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:15,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2436 transitions. [2023-08-30 11:30:15,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 101.5) internal successors, (2436), 24 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:15,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 247.0) internal successors, (6175), 25 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:15,897 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 247.0) internal successors, (6175), 25 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:15,897 INFO L175 Difference]: Start difference. First operand has 294 places, 161 transitions, 1956 flow. Second operand 24 states and 2436 transitions. [2023-08-30 11:30:15,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 445 transitions, 5672 flow [2023-08-30 11:30:16,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 445 transitions, 5114 flow, removed 180 selfloop flow, removed 29 redundant places. [2023-08-30 11:30:16,372 INFO L231 Difference]: Finished difference. Result has 258 places, 170 transitions, 2026 flow [2023-08-30 11:30:16,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1579, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2026, PETRI_PLACES=258, PETRI_TRANSITIONS=170} [2023-08-30 11:30:16,373 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 221 predicate places. [2023-08-30 11:30:16,373 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 170 transitions, 2026 flow [2023-08-30 11:30:16,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 95.1025641025641) internal successors, (3709), 39 states have internal predecessors, (3709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:16,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:16,374 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2023-08-30 11:30:16,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-30 11:30:16,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-08-30 11:30:16,577 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:30:16,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:16,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1072284316, now seen corresponding path program 1 times [2023-08-30 11:30:16,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:16,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361516252] [2023-08-30 11:30:16,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:16,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:16,714 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-30 11:30:16,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:16,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361516252] [2023-08-30 11:30:16,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361516252] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:30:16,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777723999] [2023-08-30 11:30:16,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:16,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:16,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:30:16,716 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:30:16,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-30 11:30:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:17,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 11:30:17,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:30:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-30 11:30:17,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:30:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-30 11:30:17,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777723999] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:30:17,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:30:17,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-08-30 11:30:17,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458934256] [2023-08-30 11:30:17,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:30:17,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 11:30:17,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:17,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 11:30:17,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-08-30 11:30:17,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 247 [2023-08-30 11:30:17,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 170 transitions, 2026 flow. Second operand has 17 states, 17 states have (on average 105.29411764705883) internal successors, (1790), 17 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:17,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:17,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 247 [2023-08-30 11:30:17,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:20,229 INFO L130 PetriNetUnfolder]: 9598/18266 cut-off events. [2023-08-30 11:30:20,229 INFO L131 PetriNetUnfolder]: For 153607/154797 co-relation queries the response was YES. [2023-08-30 11:30:20,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131535 conditions, 18266 events. 9598/18266 cut-off events. For 153607/154797 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 155438 event pairs, 3208 based on Foata normal form. 1630/19884 useless extension candidates. Maximal degree in co-relation 131480. Up to 3158 conditions per place. [2023-08-30 11:30:20,382 INFO L137 encePairwiseOnDemand]: 244/247 looper letters, 522 selfloop transitions, 50 changer transitions 0/573 dead transitions. [2023-08-30 11:30:20,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 573 transitions, 8101 flow [2023-08-30 11:30:20,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 11:30:20,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 11:30:20,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1876 transitions. [2023-08-30 11:30:20,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47469635627530365 [2023-08-30 11:30:20,384 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1876 transitions. [2023-08-30 11:30:20,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1876 transitions. [2023-08-30 11:30:20,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:20,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1876 transitions. [2023-08-30 11:30:20,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 117.25) internal successors, (1876), 16 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:20,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 247.0) internal successors, (4199), 17 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:20,387 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 247.0) internal successors, (4199), 17 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:20,387 INFO L175 Difference]: Start difference. First operand has 258 places, 170 transitions, 2026 flow. Second operand 16 states and 1876 transitions. [2023-08-30 11:30:20,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 573 transitions, 8101 flow [2023-08-30 11:30:20,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 573 transitions, 8022 flow, removed 32 selfloop flow, removed 8 redundant places. [2023-08-30 11:30:20,957 INFO L231 Difference]: Finished difference. Result has 273 places, 178 transitions, 2306 flow [2023-08-30 11:30:20,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1975, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2306, PETRI_PLACES=273, PETRI_TRANSITIONS=178} [2023-08-30 11:30:20,958 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 236 predicate places. [2023-08-30 11:30:20,958 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 178 transitions, 2306 flow [2023-08-30 11:30:20,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 105.29411764705883) internal successors, (1790), 17 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:20,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:20,959 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2023-08-30 11:30:20,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-30 11:30:21,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-08-30 11:30:21,160 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:30:21,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:21,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1072284356, now seen corresponding path program 8 times [2023-08-30 11:30:21,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:21,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800039079] [2023-08-30 11:30:21,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:21,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:21,636 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:21,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:21,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800039079] [2023-08-30 11:30:21,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800039079] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:30:21,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827808063] [2023-08-30 11:30:21,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:30:21,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:21,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:30:21,638 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:30:21,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-30 11:30:21,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:30:21,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:30:21,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 11:30:21,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:30:22,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:30:22,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:30:22,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:30:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:22,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:30:22,567 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2230 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2230) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 24 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2023-08-30 11:30:22,573 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:22,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-08-30 11:30:22,579 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:22,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2023-08-30 11:30:22,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-08-30 11:30:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-08-30 11:30:22,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827808063] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:30:22,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:30:22,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2023-08-30 11:30:22,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052824863] [2023-08-30 11:30:22,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:30:22,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-30 11:30:22,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:22,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-30 11:30:22,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2016, Unknown=1, NotChecked=90, Total=2256 [2023-08-30 11:30:22,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 11:30:22,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 178 transitions, 2306 flow. Second operand has 48 states, 48 states have (on average 81.08333333333333) internal successors, (3892), 48 states have internal predecessors, (3892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:22,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:22,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 11:30:22,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:26,442 INFO L130 PetriNetUnfolder]: 9569/18176 cut-off events. [2023-08-30 11:30:26,442 INFO L131 PetriNetUnfolder]: For 151613/152797 co-relation queries the response was YES. [2023-08-30 11:30:26,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132361 conditions, 18176 events. 9569/18176 cut-off events. For 151613/152797 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 153015 event pairs, 7820 based on Foata normal form. 1182/19333 useless extension candidates. Maximal degree in co-relation 132298. Up to 11504 conditions per place. [2023-08-30 11:30:26,615 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 163 selfloop transitions, 65 changer transitions 4/233 dead transitions. [2023-08-30 11:30:26,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 233 transitions, 3453 flow [2023-08-30 11:30:26,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 11:30:26,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 11:30:26,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1759 transitions. [2023-08-30 11:30:26,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3391170233275496 [2023-08-30 11:30:26,617 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1759 transitions. [2023-08-30 11:30:26,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1759 transitions. [2023-08-30 11:30:26,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:26,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1759 transitions. [2023-08-30 11:30:26,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 83.76190476190476) internal successors, (1759), 21 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:26,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 247.0) internal successors, (5434), 22 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:26,620 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 247.0) internal successors, (5434), 22 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:26,620 INFO L175 Difference]: Start difference. First operand has 273 places, 178 transitions, 2306 flow. Second operand 21 states and 1759 transitions. [2023-08-30 11:30:26,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 233 transitions, 3453 flow [2023-08-30 11:30:27,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 233 transitions, 3265 flow, removed 52 selfloop flow, removed 7 redundant places. [2023-08-30 11:30:27,165 INFO L231 Difference]: Finished difference. Result has 288 places, 184 transitions, 2407 flow [2023-08-30 11:30:27,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2170, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2407, PETRI_PLACES=288, PETRI_TRANSITIONS=184} [2023-08-30 11:30:27,165 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 251 predicate places. [2023-08-30 11:30:27,165 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 184 transitions, 2407 flow [2023-08-30 11:30:27,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 81.08333333333333) internal successors, (3892), 48 states have internal predecessors, (3892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:27,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:27,166 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:30:27,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-08-30 11:30:27,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-08-30 11:30:27,367 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:30:27,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:27,367 INFO L85 PathProgramCache]: Analyzing trace with hash -295692669, now seen corresponding path program 7 times [2023-08-30 11:30:27,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:27,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930712765] [2023-08-30 11:30:27,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:27,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:27,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:27,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930712765] [2023-08-30 11:30:27,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930712765] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:30:27,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331168854] [2023-08-30 11:30:27,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:30:27,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:27,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:30:27,870 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:30:27,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-30 11:30:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:28,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 11:30:28,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:30:28,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:30:28,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:30:28,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:30:28,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:30:28,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:30:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:28,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:30:28,716 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2284 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2284) c_~A~0.base) (+ c_~A~0.offset 20)) 4294967296))) is different from false [2023-08-30 11:30:28,774 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:28,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 11:30:28,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:28,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 75 [2023-08-30 11:30:28,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2023-08-30 11:30:28,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-08-30 11:30:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:28,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331168854] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:30:28,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:30:28,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-30 11:30:28,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004468168] [2023-08-30 11:30:28,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:30:28,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 11:30:28,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:28,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 11:30:28,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1750, Unknown=4, NotChecked=84, Total=1980 [2023-08-30 11:30:29,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:30:29,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 184 transitions, 2407 flow. Second operand has 45 states, 45 states have (on average 78.15555555555555) internal successors, (3517), 45 states have internal predecessors, (3517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:29,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:29,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:30:29,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:33,021 INFO L130 PetriNetUnfolder]: 9465/18026 cut-off events. [2023-08-30 11:30:33,021 INFO L131 PetriNetUnfolder]: For 147021/147021 co-relation queries the response was YES. [2023-08-30 11:30:33,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128319 conditions, 18026 events. 9465/18026 cut-off events. For 147021/147021 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 151814 event pairs, 3064 based on Foata normal form. 312/18338 useless extension candidates. Maximal degree in co-relation 128254. Up to 6995 conditions per place. [2023-08-30 11:30:33,243 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 538 selfloop transitions, 20 changer transitions 0/563 dead transitions. [2023-08-30 11:30:33,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 563 transitions, 9463 flow [2023-08-30 11:30:33,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 11:30:33,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 11:30:33,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1490 transitions. [2023-08-30 11:30:33,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3351327035537562 [2023-08-30 11:30:33,245 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1490 transitions. [2023-08-30 11:30:33,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1490 transitions. [2023-08-30 11:30:33,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:30:33,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1490 transitions. [2023-08-30 11:30:33,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 82.77777777777777) internal successors, (1490), 18 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:33,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:33,248 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:33,248 INFO L175 Difference]: Start difference. First operand has 288 places, 184 transitions, 2407 flow. Second operand 18 states and 1490 transitions. [2023-08-30 11:30:33,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 563 transitions, 9463 flow [2023-08-30 11:30:33,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 563 transitions, 9310 flow, removed 8 selfloop flow, removed 16 redundant places. [2023-08-30 11:30:33,564 INFO L231 Difference]: Finished difference. Result has 291 places, 185 transitions, 2336 flow [2023-08-30 11:30:33,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2270, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2336, PETRI_PLACES=291, PETRI_TRANSITIONS=185} [2023-08-30 11:30:33,565 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 254 predicate places. [2023-08-30 11:30:33,565 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 185 transitions, 2336 flow [2023-08-30 11:30:33,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 78.15555555555555) internal successors, (3517), 45 states have internal predecessors, (3517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:33,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:30:33,566 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:30:33,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-08-30 11:30:33,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:33,767 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:30:33,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:30:33,767 INFO L85 PathProgramCache]: Analyzing trace with hash -295692670, now seen corresponding path program 8 times [2023-08-30 11:30:33,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:30:33,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969164181] [2023-08-30 11:30:33,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:30:33,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:30:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:30:34,746 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:34,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:30:34,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969164181] [2023-08-30 11:30:34,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969164181] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:30:34,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729457016] [2023-08-30 11:30:34,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:30:34,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:30:34,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:30:34,748 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:30:34,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-30 11:30:35,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:30:35,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:30:35,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 11:30:35,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:30:35,231 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 11:30:35,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:30:35,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:30:35,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:30:35,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:30:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:35,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:30:36,085 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:36,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 11:30:36,095 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:30:36,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 71 [2023-08-30 11:30:36,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2023-08-30 11:30:36,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2023-08-30 11:30:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:30:36,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729457016] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:30:36,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:30:36,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2023-08-30 11:30:36,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827062782] [2023-08-30 11:30:36,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:30:36,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-30 11:30:36,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:30:36,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-30 11:30:36,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1940, Unknown=3, NotChecked=0, Total=2162 [2023-08-30 11:30:37,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 247 [2023-08-30 11:30:37,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 185 transitions, 2336 flow. Second operand has 47 states, 47 states have (on average 69.14893617021276) internal successors, (3250), 47 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:30:37,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:30:37,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 247 [2023-08-30 11:30:37,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:30:38,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 11:31:14,073 INFO L130 PetriNetUnfolder]: 14388/27408 cut-off events. [2023-08-30 11:31:14,073 INFO L131 PetriNetUnfolder]: For 269943/270201 co-relation queries the response was YES. [2023-08-30 11:31:14,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206072 conditions, 27408 events. 14388/27408 cut-off events. For 269943/270201 co-relation queries the response was YES. Maximal size of possible extension queue 829. Compared 246285 event pairs, 3277 based on Foata normal form. 1434/28840 useless extension candidates. Maximal degree in co-relation 206005. Up to 6729 conditions per place. [2023-08-30 11:31:14,422 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 722 selfloop transitions, 45 changer transitions 171/943 dead transitions. [2023-08-30 11:31:14,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 943 transitions, 15357 flow [2023-08-30 11:31:14,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-30 11:31:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-30 11:31:14,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2841 transitions. [2023-08-30 11:31:14,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30268484977626253 [2023-08-30 11:31:14,424 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2841 transitions. [2023-08-30 11:31:14,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2841 transitions. [2023-08-30 11:31:14,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:31:14,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2841 transitions. [2023-08-30 11:31:14,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 74.76315789473684) internal successors, (2841), 38 states have internal predecessors, (2841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:14,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 247.0) internal successors, (9633), 39 states have internal predecessors, (9633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:14,431 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 247.0) internal successors, (9633), 39 states have internal predecessors, (9633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:14,431 INFO L175 Difference]: Start difference. First operand has 291 places, 185 transitions, 2336 flow. Second operand 38 states and 2841 transitions. [2023-08-30 11:31:14,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 943 transitions, 15357 flow [2023-08-30 11:31:15,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 943 transitions, 15288 flow, removed 2 selfloop flow, removed 15 redundant places. [2023-08-30 11:31:15,111 INFO L231 Difference]: Finished difference. Result has 318 places, 218 transitions, 2785 flow [2023-08-30 11:31:15,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2785, PETRI_PLACES=318, PETRI_TRANSITIONS=218} [2023-08-30 11:31:15,112 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 281 predicate places. [2023-08-30 11:31:15,112 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 218 transitions, 2785 flow [2023-08-30 11:31:15,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 69.14893617021276) internal successors, (3250), 47 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:15,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:31:15,113 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 6, 1, 1, 1, 1, 1] [2023-08-30 11:31:15,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-30 11:31:15,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:31:15,313 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:31:15,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:31:15,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1575675214, now seen corresponding path program 7 times [2023-08-30 11:31:15,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:31:15,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578623420] [2023-08-30 11:31:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:31:15,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:31:15,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:31:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:15,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:31:15,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578623420] [2023-08-30 11:31:15,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578623420] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:31:15,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298467241] [2023-08-30 11:31:15,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:31:15,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:31:15,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:31:15,970 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:31:15,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-30 11:31:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:31:16,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 11:31:16,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:31:16,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:31:16,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:31:16,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-08-30 11:31:16,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:31:16,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:31:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:16,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:31:16,869 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2397 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2397) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 24 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-30 11:31:16,941 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 11:31:16,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2023-08-30 11:31:16,947 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:31:16,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2023-08-30 11:31:16,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-08-30 11:31:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2023-08-30 11:31:17,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298467241] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:31:17,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:31:17,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-08-30 11:31:17,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159971404] [2023-08-30 11:31:17,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:31:17,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-08-30 11:31:17,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:31:17,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-08-30 11:31:17,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2277, Unknown=16, NotChecked=96, Total=2550 [2023-08-30 11:31:17,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 11:31:17,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 218 transitions, 2785 flow. Second operand has 51 states, 51 states have (on average 81.07843137254902) internal successors, (4135), 51 states have internal predecessors, (4135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:17,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:31:17,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 11:31:17,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:31:22,773 INFO L130 PetriNetUnfolder]: 13943/26520 cut-off events. [2023-08-30 11:31:22,773 INFO L131 PetriNetUnfolder]: For 303450/305898 co-relation queries the response was YES. [2023-08-30 11:31:23,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212907 conditions, 26520 events. 13943/26520 cut-off events. For 303450/305898 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 237654 event pairs, 10902 based on Foata normal form. 1745/28175 useless extension candidates. Maximal degree in co-relation 212837. Up to 19723 conditions per place. [2023-08-30 11:31:23,377 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 193 selfloop transitions, 65 changer transitions 7/268 dead transitions. [2023-08-30 11:31:23,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 268 transitions, 3988 flow [2023-08-30 11:31:23,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 11:31:23,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 11:31:23,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1757 transitions. [2023-08-30 11:31:23,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33873144399460187 [2023-08-30 11:31:23,379 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1757 transitions. [2023-08-30 11:31:23,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1757 transitions. [2023-08-30 11:31:23,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:31:23,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1757 transitions. [2023-08-30 11:31:23,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 83.66666666666667) internal successors, (1757), 21 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:23,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 247.0) internal successors, (5434), 22 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:23,383 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 247.0) internal successors, (5434), 22 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:23,383 INFO L175 Difference]: Start difference. First operand has 318 places, 218 transitions, 2785 flow. Second operand 21 states and 1757 transitions. [2023-08-30 11:31:23,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 268 transitions, 3988 flow [2023-08-30 11:31:24,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 268 transitions, 3865 flow, removed 32 selfloop flow, removed 12 redundant places. [2023-08-30 11:31:24,693 INFO L231 Difference]: Finished difference. Result has 326 places, 209 transitions, 2698 flow [2023-08-30 11:31:24,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2646, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2698, PETRI_PLACES=326, PETRI_TRANSITIONS=209} [2023-08-30 11:31:24,694 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 289 predicate places. [2023-08-30 11:31:24,694 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 209 transitions, 2698 flow [2023-08-30 11:31:24,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 81.07843137254902) internal successors, (4135), 51 states have internal predecessors, (4135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:24,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:31:24,695 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1] [2023-08-30 11:31:24,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-08-30 11:31:24,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:31:24,895 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:31:24,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:31:24,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1681465452, now seen corresponding path program 6 times [2023-08-30 11:31:24,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:31:24,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868331961] [2023-08-30 11:31:24,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:31:24,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:31:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:31:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:25,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:31:25,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868331961] [2023-08-30 11:31:25,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868331961] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:31:25,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794648659] [2023-08-30 11:31:25,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:31:25,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:31:25,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:31:25,554 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:31:25,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-30 11:31:26,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-30 11:31:26,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:31:26,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 11:31:26,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:31:26,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 11:31:26,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:31:26,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:31:26,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:31:26,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:31:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:26,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:31:27,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:31:27,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-08-30 11:31:27,271 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:31:27,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 159 [2023-08-30 11:31:27,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2023-08-30 11:31:27,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2023-08-30 11:31:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:31:27,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794648659] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:31:27,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:31:27,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2023-08-30 11:31:27,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950237395] [2023-08-30 11:31:27,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:31:27,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-08-30 11:31:27,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:31:27,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-08-30 11:31:27,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=2488, Unknown=2, NotChecked=0, Total=2756 [2023-08-30 11:31:33,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 247 [2023-08-30 11:31:33,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 209 transitions, 2698 flow. Second operand has 53 states, 53 states have (on average 69.0754716981132) internal successors, (3661), 53 states have internal predecessors, (3661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:31:33,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:31:33,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 247 [2023-08-30 11:31:33,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:31:34,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 11:32:12,912 INFO L130 PetriNetUnfolder]: 17126/32690 cut-off events. [2023-08-30 11:32:12,912 INFO L131 PetriNetUnfolder]: For 335689/340223 co-relation queries the response was YES. [2023-08-30 11:32:13,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253456 conditions, 32690 events. 17126/32690 cut-off events. For 335689/340223 co-relation queries the response was YES. Maximal size of possible extension queue 1054. Compared 305390 event pairs, 5304 based on Foata normal form. 3975/36663 useless extension candidates. Maximal degree in co-relation 253387. Up to 6515 conditions per place. [2023-08-30 11:32:13,492 INFO L137 encePairwiseOnDemand]: 237/247 looper letters, 1122 selfloop transitions, 149 changer transitions 94/1368 dead transitions. [2023-08-30 11:32:13,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1368 transitions, 19015 flow [2023-08-30 11:32:13,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-08-30 11:32:13,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-08-30 11:32:13,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 5476 transitions. [2023-08-30 11:32:13,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30791722896986057 [2023-08-30 11:32:13,496 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 5476 transitions. [2023-08-30 11:32:13,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 5476 transitions. [2023-08-30 11:32:13,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:13,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 5476 transitions. [2023-08-30 11:32:13,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 76.05555555555556) internal successors, (5476), 72 states have internal predecessors, (5476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:13,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 247.0) internal successors, (18031), 73 states have internal predecessors, (18031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:13,509 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 247.0) internal successors, (18031), 73 states have internal predecessors, (18031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:13,509 INFO L175 Difference]: Start difference. First operand has 326 places, 209 transitions, 2698 flow. Second operand 72 states and 5476 transitions. [2023-08-30 11:32:13,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1368 transitions, 19015 flow [2023-08-30 11:32:14,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 1368 transitions, 18628 flow, removed 6 selfloop flow, removed 27 redundant places. [2023-08-30 11:32:14,746 INFO L231 Difference]: Finished difference. Result has 372 places, 267 transitions, 3745 flow [2023-08-30 11:32:14,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2413, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=3745, PETRI_PLACES=372, PETRI_TRANSITIONS=267} [2023-08-30 11:32:14,747 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 335 predicate places. [2023-08-30 11:32:14,747 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 267 transitions, 3745 flow [2023-08-30 11:32:14,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 69.0754716981132) internal successors, (3661), 53 states have internal predecessors, (3661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:14,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:14,748 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1] [2023-08-30 11:32:14,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-08-30 11:32:14,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:14,956 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:32:14,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:14,956 INFO L85 PathProgramCache]: Analyzing trace with hash 69123971, now seen corresponding path program 7 times [2023-08-30 11:32:14,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:14,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762793264] [2023-08-30 11:32:14,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:14,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:15,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:15,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762793264] [2023-08-30 11:32:15,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762793264] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:15,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188592286] [2023-08-30 11:32:15,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:32:15,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:15,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:15,501 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:32:15,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-30 11:32:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:15,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 11:32:15,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:15,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:32:16,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:32:16,039 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 11:32:16,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:32:16,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:32:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:16,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:32:16,442 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2513 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2513) c_~A~0.base) (+ c_~A~0.offset 24)) 4294967296)) is different from false [2023-08-30 11:32:16,508 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:32:16,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 11:32:16,514 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:32:16,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 129 [2023-08-30 11:32:16,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 11:32:16,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-30 11:32:16,762 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:16,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188592286] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:32:16,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:32:16,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-08-30 11:32:16,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325652947] [2023-08-30 11:32:16,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:32:16,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-08-30 11:32:16,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:16,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-08-30 11:32:16,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2288, Unknown=4, NotChecked=96, Total=2550 [2023-08-30 11:32:16,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:32:16,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 267 transitions, 3745 flow. Second operand has 51 states, 51 states have (on average 78.09803921568627) internal successors, (3983), 51 states have internal predecessors, (3983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:16,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:16,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:32:16,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:24,217 INFO L130 PetriNetUnfolder]: 16904/32318 cut-off events. [2023-08-30 11:32:24,217 INFO L131 PetriNetUnfolder]: For 326991/330946 co-relation queries the response was YES. [2023-08-30 11:32:24,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253269 conditions, 32318 events. 16904/32318 cut-off events. For 326991/330946 co-relation queries the response was YES. Maximal size of possible extension queue 1036. Compared 298504 event pairs, 11347 based on Foata normal form. 2602/34845 useless extension candidates. Maximal degree in co-relation 253199. Up to 17127 conditions per place. [2023-08-30 11:32:24,833 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 488 selfloop transitions, 68 changer transitions 0/559 dead transitions. [2023-08-30 11:32:24,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 559 transitions, 8266 flow [2023-08-30 11:32:24,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 11:32:24,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 11:32:24,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1680 transitions. [2023-08-30 11:32:24,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.340080971659919 [2023-08-30 11:32:24,835 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1680 transitions. [2023-08-30 11:32:24,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1680 transitions. [2023-08-30 11:32:24,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:24,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1680 transitions. [2023-08-30 11:32:24,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 84.0) internal successors, (1680), 20 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:24,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 247.0) internal successors, (5187), 21 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:24,839 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 247.0) internal successors, (5187), 21 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:24,839 INFO L175 Difference]: Start difference. First operand has 372 places, 267 transitions, 3745 flow. Second operand 20 states and 1680 transitions. [2023-08-30 11:32:24,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 559 transitions, 8266 flow [2023-08-30 11:32:27,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 559 transitions, 7882 flow, removed 55 selfloop flow, removed 26 redundant places. [2023-08-30 11:32:27,090 INFO L231 Difference]: Finished difference. Result has 365 places, 266 transitions, 3466 flow [2023-08-30 11:32:27,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=3330, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3466, PETRI_PLACES=365, PETRI_TRANSITIONS=266} [2023-08-30 11:32:27,090 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 328 predicate places. [2023-08-30 11:32:27,091 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 266 transitions, 3466 flow [2023-08-30 11:32:27,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 78.09803921568627) internal successors, (3983), 51 states have internal predecessors, (3983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:27,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:27,091 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:32:27,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-08-30 11:32:27,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:27,292 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:32:27,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:27,292 INFO L85 PathProgramCache]: Analyzing trace with hash -576535718, now seen corresponding path program 8 times [2023-08-30 11:32:27,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:27,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998003131] [2023-08-30 11:32:27,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:27,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:27,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:27,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998003131] [2023-08-30 11:32:27,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998003131] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:27,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961841743] [2023-08-30 11:32:27,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:32:27,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:27,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:27,485 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:32:27,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-30 11:32:27,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:32:27,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:32:27,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 11:32:27,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:27,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:32:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:28,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961841743] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:32:28,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:32:28,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2023-08-30 11:32:28,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060268817] [2023-08-30 11:32:28,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:32:28,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 11:32:28,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:28,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 11:32:28,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1111, Unknown=0, NotChecked=0, Total=1482 [2023-08-30 11:32:28,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 11:32:28,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 266 transitions, 3466 flow. Second operand has 39 states, 39 states have (on average 95.15384615384616) internal successors, (3711), 39 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:28,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:28,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 11:32:28,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:34,566 INFO L130 PetriNetUnfolder]: 16758/32146 cut-off events. [2023-08-30 11:32:34,567 INFO L131 PetriNetUnfolder]: For 360252/360847 co-relation queries the response was YES. [2023-08-30 11:32:35,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246143 conditions, 32146 events. 16758/32146 cut-off events. For 360252/360847 co-relation queries the response was YES. Maximal size of possible extension queue 1021. Compared 298180 event pairs, 9547 based on Foata normal form. 763/32897 useless extension candidates. Maximal degree in co-relation 246075. Up to 20002 conditions per place. [2023-08-30 11:32:35,124 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 216 selfloop transitions, 19 changer transitions 289/530 dead transitions. [2023-08-30 11:32:35,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 530 transitions, 7934 flow [2023-08-30 11:32:35,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 11:32:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 11:32:35,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1780 transitions. [2023-08-30 11:32:35,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4003598740440846 [2023-08-30 11:32:35,126 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1780 transitions. [2023-08-30 11:32:35,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1780 transitions. [2023-08-30 11:32:35,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:35,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1780 transitions. [2023-08-30 11:32:35,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 98.88888888888889) internal successors, (1780), 18 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:35,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:35,129 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:35,129 INFO L175 Difference]: Start difference. First operand has 365 places, 266 transitions, 3466 flow. Second operand 18 states and 1780 transitions. [2023-08-30 11:32:35,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 530 transitions, 7934 flow [2023-08-30 11:32:36,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 530 transitions, 7675 flow, removed 3 selfloop flow, removed 18 redundant places. [2023-08-30 11:32:36,788 INFO L231 Difference]: Finished difference. Result has 365 places, 202 transitions, 2638 flow [2023-08-30 11:32:36,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=3294, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2638, PETRI_PLACES=365, PETRI_TRANSITIONS=202} [2023-08-30 11:32:36,789 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 328 predicate places. [2023-08-30 11:32:36,789 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 202 transitions, 2638 flow [2023-08-30 11:32:36,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 95.15384615384616) internal successors, (3711), 39 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:36,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:36,789 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:32:36,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-08-30 11:32:36,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-08-30 11:32:36,990 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:32:36,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:36,990 INFO L85 PathProgramCache]: Analyzing trace with hash 775669026, now seen corresponding path program 9 times [2023-08-30 11:32:36,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:36,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232187288] [2023-08-30 11:32:36,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:36,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:37,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:37,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232187288] [2023-08-30 11:32:37,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232187288] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:37,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187417322] [2023-08-30 11:32:37,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:32:37,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:37,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:37,784 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:32:37,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-30 11:32:38,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-30 11:32:38,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:32:38,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-30 11:32:38,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:38,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:32:38,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:32:38,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-08-30 11:32:38,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:32:38,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-08-30 11:32:38,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:32:38,483 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 11:32:38,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:32:38,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:32:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:38,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:32:41,161 INFO L321 Elim1Store]: treesize reduction 66, result has 35.9 percent of original size [2023-08-30 11:32:41,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 52 [2023-08-30 11:32:41,168 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:32:41,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 65 [2023-08-30 11:32:41,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-08-30 11:32:41,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-08-30 11:32:41,409 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:41,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187417322] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:32:41,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:32:41,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-08-30 11:32:41,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969871070] [2023-08-30 11:32:41,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:32:41,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-08-30 11:32:41,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:41,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-08-30 11:32:41,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2344, Unknown=25, NotChecked=0, Total=2550 [2023-08-30 11:32:41,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:32:41,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 202 transitions, 2638 flow. Second operand has 51 states, 51 states have (on average 78.13725490196079) internal successors, (3985), 51 states have internal predecessors, (3985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:41,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:41,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:32:41,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:48,150 INFO L130 PetriNetUnfolder]: 15526/29801 cut-off events. [2023-08-30 11:32:48,150 INFO L131 PetriNetUnfolder]: For 351847/352412 co-relation queries the response was YES. [2023-08-30 11:32:48,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234154 conditions, 29801 events. 15526/29801 cut-off events. For 351847/352412 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 277012 event pairs, 5090 based on Foata normal form. 961/30754 useless extension candidates. Maximal degree in co-relation 234086. Up to 11282 conditions per place. [2023-08-30 11:32:48,638 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 648 selfloop transitions, 30 changer transitions 0/684 dead transitions. [2023-08-30 11:32:48,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 684 transitions, 11682 flow [2023-08-30 11:32:48,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 11:32:48,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 11:32:48,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1567 transitions. [2023-08-30 11:32:48,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3339015555082037 [2023-08-30 11:32:48,640 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1567 transitions. [2023-08-30 11:32:48,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1567 transitions. [2023-08-30 11:32:48,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:48,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1567 transitions. [2023-08-30 11:32:48,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 82.47368421052632) internal successors, (1567), 19 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:48,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 247.0) internal successors, (4940), 20 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:48,644 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 247.0) internal successors, (4940), 20 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:48,644 INFO L175 Difference]: Start difference. First operand has 365 places, 202 transitions, 2638 flow. Second operand 19 states and 1567 transitions. [2023-08-30 11:32:48,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 684 transitions, 11682 flow [2023-08-30 11:32:56,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 684 transitions, 10569 flow, removed 281 selfloop flow, removed 23 redundant places. [2023-08-30 11:32:56,122 INFO L231 Difference]: Finished difference. Result has 305 places, 201 transitions, 2437 flow [2023-08-30 11:32:56,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2377, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2437, PETRI_PLACES=305, PETRI_TRANSITIONS=201} [2023-08-30 11:32:56,122 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 268 predicate places. [2023-08-30 11:32:56,122 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 201 transitions, 2437 flow [2023-08-30 11:32:56,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 78.13725490196079) internal successors, (3985), 51 states have internal predecessors, (3985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:56,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:56,123 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2023-08-30 11:32:56,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-08-30 11:32:56,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-08-30 11:32:56,324 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:32:56,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:56,324 INFO L85 PathProgramCache]: Analyzing trace with hash 2142845414, now seen corresponding path program 8 times [2023-08-30 11:32:56,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:56,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003884563] [2023-08-30 11:32:56,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:56,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:56,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:56,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:56,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003884563] [2023-08-30 11:32:56,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003884563] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:56,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566387897] [2023-08-30 11:32:56,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:32:56,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:56,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:56,648 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:32:56,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-08-30 11:32:57,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:32:57,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:32:57,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 11:32:57,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:57,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:32:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:57,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566387897] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:32:57,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:32:57,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 42 [2023-08-30 11:32:57,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460032792] [2023-08-30 11:32:57,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:32:57,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 11:32:57,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:57,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 11:32:57,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2023-08-30 11:32:57,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 11:32:57,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 201 transitions, 2437 flow. Second operand has 44 states, 44 states have (on average 95.11363636363636) internal successors, (4185), 44 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:57,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:57,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 11:32:57,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:33:02,472 INFO L130 PetriNetUnfolder]: 12920/24990 cut-off events. [2023-08-30 11:33:02,472 INFO L131 PetriNetUnfolder]: For 168882/172373 co-relation queries the response was YES. [2023-08-30 11:33:02,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192378 conditions, 24990 events. 12920/24990 cut-off events. For 168882/172373 co-relation queries the response was YES. Maximal size of possible extension queue 827. Compared 228781 event pairs, 7219 based on Foata normal form. 1894/26878 useless extension candidates. Maximal degree in co-relation 192324. Up to 11786 conditions per place. [2023-08-30 11:33:03,046 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 339 selfloop transitions, 72 changer transitions 116/529 dead transitions. [2023-08-30 11:33:03,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 529 transitions, 6967 flow [2023-08-30 11:33:03,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 11:33:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 11:33:03,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2706 transitions. [2023-08-30 11:33:03,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057579847053531 [2023-08-30 11:33:03,048 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2706 transitions. [2023-08-30 11:33:03,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2706 transitions. [2023-08-30 11:33:03,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:33:03,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2706 transitions. [2023-08-30 11:33:03,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 100.22222222222223) internal successors, (2706), 27 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:03,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 247.0) internal successors, (6916), 28 states have internal predecessors, (6916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:03,053 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 247.0) internal successors, (6916), 28 states have internal predecessors, (6916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:03,053 INFO L175 Difference]: Start difference. First operand has 305 places, 201 transitions, 2437 flow. Second operand 27 states and 2706 transitions. [2023-08-30 11:33:03,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 529 transitions, 6967 flow [2023-08-30 11:33:03,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 529 transitions, 6655 flow, removed 3 selfloop flow, removed 18 redundant places. [2023-08-30 11:33:03,452 INFO L231 Difference]: Finished difference. Result has 315 places, 194 transitions, 2428 flow [2023-08-30 11:33:03,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2344, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2428, PETRI_PLACES=315, PETRI_TRANSITIONS=194} [2023-08-30 11:33:03,453 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 278 predicate places. [2023-08-30 11:33:03,453 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 194 transitions, 2428 flow [2023-08-30 11:33:03,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 95.11363636363636) internal successors, (4185), 44 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:03,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:33:03,454 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2023-08-30 11:33:03,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-08-30 11:33:03,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-08-30 11:33:03,654 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:33:03,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:33:03,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1601289065, now seen corresponding path program 8 times [2023-08-30 11:33:03,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:33:03,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963672128] [2023-08-30 11:33:03,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:33:03,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:33:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:33:04,353 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:33:04,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:33:04,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963672128] [2023-08-30 11:33:04,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963672128] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:33:04,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013834913] [2023-08-30 11:33:04,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:33:04,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:33:04,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:33:04,354 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:33:04,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-08-30 11:33:04,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:33:04,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:33:04,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-30 11:33:04,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:33:04,895 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 11:33:04,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:33:04,928 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 11:33:05,143 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:33:05,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:33:05,391 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2740 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2740) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 28 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-30 11:33:05,398 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:33:05,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-08-30 11:33:05,405 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:33:05,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2023-08-30 11:33:05,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-08-30 11:33:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2023-08-30 11:33:05,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013834913] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:33:05,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:33:05,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2023-08-30 11:33:05,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228715514] [2023-08-30 11:33:05,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:33:05,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-08-30 11:33:05,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:33:05,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-08-30 11:33:05,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2590, Unknown=1, NotChecked=102, Total=2862 [2023-08-30 11:33:05,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 11:33:05,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 194 transitions, 2428 flow. Second operand has 54 states, 54 states have (on average 81.07407407407408) internal successors, (4378), 54 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:05,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:33:05,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 11:33:05,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:33:10,663 INFO L130 PetriNetUnfolder]: 12067/23305 cut-off events. [2023-08-30 11:33:10,663 INFO L131 PetriNetUnfolder]: For 178155/181491 co-relation queries the response was YES. [2023-08-30 11:33:10,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177687 conditions, 23305 events. 12067/23305 cut-off events. For 178155/181491 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 208994 event pairs, 9844 based on Foata normal form. 1724/25015 useless extension candidates. Maximal degree in co-relation 177633. Up to 19733 conditions per place. [2023-08-30 11:33:10,978 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 178 selfloop transitions, 56 changer transitions 0/236 dead transitions. [2023-08-30 11:33:10,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 236 transitions, 3396 flow [2023-08-30 11:33:10,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 11:33:10,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 11:33:10,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1921 transitions. [2023-08-30 11:33:10,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33814469283576837 [2023-08-30 11:33:10,980 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1921 transitions. [2023-08-30 11:33:10,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1921 transitions. [2023-08-30 11:33:10,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:33:10,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1921 transitions. [2023-08-30 11:33:10,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 83.52173913043478) internal successors, (1921), 23 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:10,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:10,984 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:10,984 INFO L175 Difference]: Start difference. First operand has 315 places, 194 transitions, 2428 flow. Second operand 23 states and 1921 transitions. [2023-08-30 11:33:10,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 236 transitions, 3396 flow [2023-08-30 11:33:11,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 236 transitions, 3324 flow, removed 5 selfloop flow, removed 16 redundant places. [2023-08-30 11:33:11,380 INFO L231 Difference]: Finished difference. Result has 319 places, 200 transitions, 2571 flow [2023-08-30 11:33:11,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2358, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2571, PETRI_PLACES=319, PETRI_TRANSITIONS=200} [2023-08-30 11:33:11,380 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 282 predicate places. [2023-08-30 11:33:11,380 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 200 transitions, 2571 flow [2023-08-30 11:33:11,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 81.07407407407408) internal successors, (4378), 54 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:11,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:33:11,381 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:33:11,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-08-30 11:33:11,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:33:11,585 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:33:11,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:33:11,585 INFO L85 PathProgramCache]: Analyzing trace with hash 998216837, now seen corresponding path program 9 times [2023-08-30 11:33:11,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:33:11,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075376366] [2023-08-30 11:33:11,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:33:11,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:33:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:33:12,186 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:33:12,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:33:12,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075376366] [2023-08-30 11:33:12,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075376366] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:33:12,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721465706] [2023-08-30 11:33:12,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:33:12,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:33:12,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:33:12,187 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:33:12,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-08-30 11:33:12,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-30 11:33:12,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:33:12,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 11:33:12,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:33:12,830 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 11:33:12,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:33:12,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:33:12,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:33:12,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:33:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:33:13,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:33:13,884 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:33:13,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-08-30 11:33:13,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:33:13,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 159 [2023-08-30 11:33:13,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2023-08-30 11:33:13,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2023-08-30 11:33:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:33:14,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721465706] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:33:14,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:33:14,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2023-08-30 11:33:14,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997232266] [2023-08-30 11:33:14,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:33:14,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-08-30 11:33:14,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:33:14,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-08-30 11:33:14,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2482, Unknown=2, NotChecked=0, Total=2756 [2023-08-30 11:33:20,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 247 [2023-08-30 11:33:20,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 200 transitions, 2571 flow. Second operand has 53 states, 53 states have (on average 69.13207547169812) internal successors, (3664), 53 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:20,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:33:20,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 247 [2023-08-30 11:33:20,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:33:37,580 INFO L130 PetriNetUnfolder]: 11479/22226 cut-off events. [2023-08-30 11:33:37,580 INFO L131 PetriNetUnfolder]: For 159526/159824 co-relation queries the response was YES. [2023-08-30 11:33:37,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166918 conditions, 22226 events. 11479/22226 cut-off events. For 159526/159824 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 198336 event pairs, 1112 based on Foata normal form. 1312/23534 useless extension candidates. Maximal degree in co-relation 166860. Up to 4849 conditions per place. [2023-08-30 11:33:37,892 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 857 selfloop transitions, 47 changer transitions 345/1253 dead transitions. [2023-08-30 11:33:37,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 1253 transitions, 19884 flow [2023-08-30 11:33:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-30 11:33:37,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-30 11:33:37,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3892 transitions. [2023-08-30 11:33:37,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3030208657739022 [2023-08-30 11:33:37,895 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3892 transitions. [2023-08-30 11:33:37,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3892 transitions. [2023-08-30 11:33:37,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:33:37,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3892 transitions. [2023-08-30 11:33:37,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 74.84615384615384) internal successors, (3892), 52 states have internal predecessors, (3892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:37,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 247.0) internal successors, (13091), 53 states have internal predecessors, (13091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:37,908 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 247.0) internal successors, (13091), 53 states have internal predecessors, (13091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:37,908 INFO L175 Difference]: Start difference. First operand has 319 places, 200 transitions, 2571 flow. Second operand 52 states and 3892 transitions. [2023-08-30 11:33:37,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 1253 transitions, 19884 flow [2023-08-30 11:33:38,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 1253 transitions, 19722 flow, removed 43 selfloop flow, removed 16 redundant places. [2023-08-30 11:33:38,258 INFO L231 Difference]: Finished difference. Result has 358 places, 167 transitions, 2329 flow [2023-08-30 11:33:38,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2482, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=2329, PETRI_PLACES=358, PETRI_TRANSITIONS=167} [2023-08-30 11:33:38,259 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 321 predicate places. [2023-08-30 11:33:38,259 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 167 transitions, 2329 flow [2023-08-30 11:33:38,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 69.13207547169812) internal successors, (3664), 53 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:38,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:33:38,260 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 7, 1, 1, 1, 1, 1] [2023-08-30 11:33:38,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-08-30 11:33:38,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-08-30 11:33:38,467 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:33:38,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:33:38,467 INFO L85 PathProgramCache]: Analyzing trace with hash -28600117, now seen corresponding path program 9 times [2023-08-30 11:33:38,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:33:38,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603145529] [2023-08-30 11:33:38,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:33:38,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:33:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:33:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:33:39,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:33:39,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603145529] [2023-08-30 11:33:39,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603145529] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:33:39,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35433895] [2023-08-30 11:33:39,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:33:39,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:33:39,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:33:39,381 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:33:39,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-08-30 11:33:39,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 11:33:39,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:33:39,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-30 11:33:39,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:33:40,141 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 11:33:40,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:33:40,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 11:33:40,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:33:40,220 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 11:33:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:33:40,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:33:40,694 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2861 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2861) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 28 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2023-08-30 11:33:40,773 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 11:33:40,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 39 [2023-08-30 11:33:40,778 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:33:40,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2023-08-30 11:33:40,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-08-30 11:33:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2023-08-30 11:33:41,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35433895] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:33:41,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:33:41,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2023-08-30 11:33:41,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643086174] [2023-08-30 11:33:41,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:33:41,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-08-30 11:33:41,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:33:41,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-08-30 11:33:41,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2892, Unknown=11, NotChecked=108, Total=3192 [2023-08-30 11:33:41,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 11:33:41,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 167 transitions, 2329 flow. Second operand has 57 states, 57 states have (on average 81.0701754385965) internal successors, (4621), 57 states have internal predecessors, (4621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:41,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:33:41,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 11:33:41,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:33:45,622 INFO L130 PetriNetUnfolder]: 10242/19810 cut-off events. [2023-08-30 11:33:45,622 INFO L131 PetriNetUnfolder]: For 197085/200052 co-relation queries the response was YES. [2023-08-30 11:33:45,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165319 conditions, 19810 events. 10242/19810 cut-off events. For 197085/200052 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 173816 event pairs, 7711 based on Foata normal form. 1545/21274 useless extension candidates. Maximal degree in co-relation 165257. Up to 17539 conditions per place. [2023-08-30 11:33:45,872 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 196 selfloop transitions, 57 changer transitions 0/255 dead transitions. [2023-08-30 11:33:45,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 255 transitions, 4117 flow [2023-08-30 11:33:45,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 11:33:45,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 11:33:45,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1995 transitions. [2023-08-30 11:33:45,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33653846153846156 [2023-08-30 11:33:45,874 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1995 transitions. [2023-08-30 11:33:45,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1995 transitions. [2023-08-30 11:33:45,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:33:45,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1995 transitions. [2023-08-30 11:33:45,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 83.125) internal successors, (1995), 24 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:45,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 247.0) internal successors, (6175), 25 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:45,878 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 247.0) internal successors, (6175), 25 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:45,878 INFO L175 Difference]: Start difference. First operand has 358 places, 167 transitions, 2329 flow. Second operand 24 states and 1995 transitions. [2023-08-30 11:33:45,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 255 transitions, 4117 flow [2023-08-30 11:33:46,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 255 transitions, 3718 flow, removed 80 selfloop flow, removed 28 redundant places. [2023-08-30 11:33:46,469 INFO L231 Difference]: Finished difference. Result has 301 places, 165 transitions, 2178 flow [2023-08-30 11:33:46,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2064, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2178, PETRI_PLACES=301, PETRI_TRANSITIONS=165} [2023-08-30 11:33:46,469 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 264 predicate places. [2023-08-30 11:33:46,470 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 165 transitions, 2178 flow [2023-08-30 11:33:46,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 81.0701754385965) internal successors, (4621), 57 states have internal predecessors, (4621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:46,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:33:46,471 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1] [2023-08-30 11:33:46,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-08-30 11:33:46,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:33:46,678 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:33:46,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:33:46,679 INFO L85 PathProgramCache]: Analyzing trace with hash 986869833, now seen corresponding path program 9 times [2023-08-30 11:33:46,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:33:46,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024832610] [2023-08-30 11:33:46,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:33:46,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:33:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:33:47,410 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:33:47,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:33:47,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024832610] [2023-08-30 11:33:47,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024832610] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:33:47,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358511659] [2023-08-30 11:33:47,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:33:47,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:33:47,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:33:47,412 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:33:47,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-08-30 11:33:47,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-30 11:33:47,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:33:47,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 11:33:47,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:33:48,214 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 11:33:48,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:33:48,263 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 11:33:48,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:33:48,354 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 11:33:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:33:48,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:33:48,899 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2923 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2923) c_~A~0.base) (+ c_~A~0.offset 28)) 4294967296)) is different from false [2023-08-30 11:33:48,964 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:33:48,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 11:33:48,969 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:33:48,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 129 [2023-08-30 11:33:48,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 11:33:48,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-30 11:33:49,275 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:33:49,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358511659] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:33:49,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:33:49,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 56 [2023-08-30 11:33:49,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788903733] [2023-08-30 11:33:49,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:33:49,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-08-30 11:33:49,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:33:49,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-08-30 11:33:49,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3006, Unknown=16, NotChecked=110, Total=3306 [2023-08-30 11:33:49,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:33:49,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 165 transitions, 2178 flow. Second operand has 58 states, 58 states have (on average 78.08620689655173) internal successors, (4529), 58 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:49,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:33:49,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:33:49,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:33:54,376 INFO L130 PetriNetUnfolder]: 10102/19563 cut-off events. [2023-08-30 11:33:54,376 INFO L131 PetriNetUnfolder]: For 148960/150705 co-relation queries the response was YES. [2023-08-30 11:33:54,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154031 conditions, 19563 events. 10102/19563 cut-off events. For 148960/150705 co-relation queries the response was YES. Maximal size of possible extension queue 683. Compared 172954 event pairs, 6088 based on Foata normal form. 1839/21370 useless extension candidates. Maximal degree in co-relation 153975. Up to 9776 conditions per place. [2023-08-30 11:33:54,585 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 515 selfloop transitions, 53 changer transitions 0/570 dead transitions. [2023-08-30 11:33:54,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 570 transitions, 8179 flow [2023-08-30 11:33:54,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 11:33:54,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 11:33:54,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1836 transitions. [2023-08-30 11:33:54,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3378726536621273 [2023-08-30 11:33:54,587 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1836 transitions. [2023-08-30 11:33:54,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1836 transitions. [2023-08-30 11:33:54,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:33:54,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1836 transitions. [2023-08-30 11:33:54,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 83.45454545454545) internal successors, (1836), 22 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:54,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 247.0) internal successors, (5681), 23 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:54,591 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 247.0) internal successors, (5681), 23 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:54,591 INFO L175 Difference]: Start difference. First operand has 301 places, 165 transitions, 2178 flow. Second operand 22 states and 1836 transitions. [2023-08-30 11:33:54,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 570 transitions, 8179 flow [2023-08-30 11:33:55,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 570 transitions, 7886 flow, removed 2 selfloop flow, removed 21 redundant places. [2023-08-30 11:33:55,790 INFO L231 Difference]: Finished difference. Result has 303 places, 166 transitions, 2229 flow [2023-08-30 11:33:55,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2066, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2229, PETRI_PLACES=303, PETRI_TRANSITIONS=166} [2023-08-30 11:33:55,791 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 266 predicate places. [2023-08-30 11:33:55,791 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 166 transitions, 2229 flow [2023-08-30 11:33:55,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 78.08620689655173) internal successors, (4529), 58 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:55,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:33:55,792 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 6, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:33:55,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-08-30 11:33:55,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:33:55,999 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:33:55,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:33:55,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1724061511, now seen corresponding path program 10 times [2023-08-30 11:33:56,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:33:56,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887043342] [2023-08-30 11:33:56,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:33:56,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:33:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:33:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:33:56,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:33:56,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887043342] [2023-08-30 11:33:56,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887043342] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:33:56,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023388149] [2023-08-30 11:33:56,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:33:56,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:33:56,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:33:56,593 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:33:56,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-08-30 11:33:56,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:33:56,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:33:56,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 11:33:56,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:33:57,149 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 11:33:57,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:33:57,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-08-30 11:33:57,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:33:57,227 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 11:33:57,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:33:57,260 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 11:33:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:33:57,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:33:57,826 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 11:33:57,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 40 [2023-08-30 11:33:57,833 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:33:57,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 129 [2023-08-30 11:33:57,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-30 11:33:57,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 11:33:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:33:58,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023388149] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:33:58,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:33:58,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2023-08-30 11:33:58,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564408556] [2023-08-30 11:33:58,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:33:58,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-08-30 11:33:58,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:33:58,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-08-30 11:33:58,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2666, Unknown=18, NotChecked=0, Total=2862 [2023-08-30 11:34:00,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:34:00,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 166 transitions, 2229 flow. Second operand has 54 states, 54 states have (on average 78.12962962962963) internal successors, (4219), 54 states have internal predecessors, (4219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:00,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:34:00,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:34:00,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:34:04,180 INFO L130 PetriNetUnfolder]: 9989/19347 cut-off events. [2023-08-30 11:34:04,180 INFO L131 PetriNetUnfolder]: For 160982/161293 co-relation queries the response was YES. [2023-08-30 11:34:04,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152297 conditions, 19347 events. 9989/19347 cut-off events. For 160982/161293 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 170231 event pairs, 2642 based on Foata normal form. 707/20050 useless extension candidates. Maximal degree in co-relation 152239. Up to 6148 conditions per place. [2023-08-30 11:34:04,362 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 536 selfloop transitions, 31 changer transitions 0/571 dead transitions. [2023-08-30 11:34:04,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 571 transitions, 10130 flow [2023-08-30 11:34:04,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 11:34:04,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 11:34:04,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1654 transitions. [2023-08-30 11:34:04,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33481781376518216 [2023-08-30 11:34:04,364 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1654 transitions. [2023-08-30 11:34:04,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1654 transitions. [2023-08-30 11:34:04,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:34:04,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1654 transitions. [2023-08-30 11:34:04,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 82.7) internal successors, (1654), 20 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:04,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 247.0) internal successors, (5187), 21 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:04,368 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 247.0) internal successors, (5187), 21 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:04,368 INFO L175 Difference]: Start difference. First operand has 303 places, 166 transitions, 2229 flow. Second operand 20 states and 1654 transitions. [2023-08-30 11:34:04,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 571 transitions, 10130 flow [2023-08-30 11:34:04,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 571 transitions, 9719 flow, removed 23 selfloop flow, removed 19 redundant places. [2023-08-30 11:34:04,649 INFO L231 Difference]: Finished difference. Result has 303 places, 165 transitions, 2170 flow [2023-08-30 11:34:04,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2108, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2170, PETRI_PLACES=303, PETRI_TRANSITIONS=165} [2023-08-30 11:34:04,650 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 266 predicate places. [2023-08-30 11:34:04,650 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 165 transitions, 2170 flow [2023-08-30 11:34:04,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 78.12962962962963) internal successors, (4219), 54 states have internal predecessors, (4219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:04,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:34:04,651 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1] [2023-08-30 11:34:04,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-08-30 11:34:04,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:34:04,854 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:34:04,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:34:04,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1899648850, now seen corresponding path program 9 times [2023-08-30 11:34:04,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:34:04,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141154280] [2023-08-30 11:34:04,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:34:04,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:34:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:34:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:05,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:34:05,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141154280] [2023-08-30 11:34:05,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141154280] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:34:05,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157039714] [2023-08-30 11:34:05,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:34:05,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:34:05,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:34:05,177 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:34:05,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-08-30 11:34:05,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-30 11:34:05,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:34:05,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 11:34:05,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:34:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:05,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:34:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:06,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157039714] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:34:06,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:34:06,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 47 [2023-08-30 11:34:06,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352268853] [2023-08-30 11:34:06,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:34:06,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-30 11:34:06,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:34:06,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-30 11:34:06,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2023-08-30 11:34:06,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 11:34:06,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 165 transitions, 2170 flow. Second operand has 49 states, 49 states have (on average 95.08163265306122) internal successors, (4659), 49 states have internal predecessors, (4659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:06,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:34:06,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 11:34:06,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:34:09,835 INFO L130 PetriNetUnfolder]: 7436/14420 cut-off events. [2023-08-30 11:34:09,836 INFO L131 PetriNetUnfolder]: For 98575/99751 co-relation queries the response was YES. [2023-08-30 11:34:09,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114387 conditions, 14420 events. 7436/14420 cut-off events. For 98575/99751 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 121616 event pairs, 3868 based on Foata normal form. 1341/15724 useless extension candidates. Maximal degree in co-relation 114330. Up to 5584 conditions per place. [2023-08-30 11:34:09,961 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 353 selfloop transitions, 62 changer transitions 152/569 dead transitions. [2023-08-30 11:34:09,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 569 transitions, 7304 flow [2023-08-30 11:34:09,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 11:34:09,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 11:34:09,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3022 transitions. [2023-08-30 11:34:09,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4078272604588394 [2023-08-30 11:34:09,963 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3022 transitions. [2023-08-30 11:34:09,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3022 transitions. [2023-08-30 11:34:09,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:34:09,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3022 transitions. [2023-08-30 11:34:09,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 100.73333333333333) internal successors, (3022), 30 states have internal predecessors, (3022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:09,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 247.0) internal successors, (7657), 31 states have internal predecessors, (7657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:09,971 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 247.0) internal successors, (7657), 31 states have internal predecessors, (7657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:09,971 INFO L175 Difference]: Start difference. First operand has 303 places, 165 transitions, 2170 flow. Second operand 30 states and 3022 transitions. [2023-08-30 11:34:09,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 569 transitions, 7304 flow [2023-08-30 11:34:10,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 569 transitions, 6858 flow, removed 10 selfloop flow, removed 22 redundant places. [2023-08-30 11:34:10,198 INFO L231 Difference]: Finished difference. Result has 312 places, 157 transitions, 1987 flow [2023-08-30 11:34:10,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1867, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1987, PETRI_PLACES=312, PETRI_TRANSITIONS=157} [2023-08-30 11:34:10,198 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 275 predicate places. [2023-08-30 11:34:10,198 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 157 transitions, 1987 flow [2023-08-30 11:34:10,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 95.08163265306122) internal successors, (4659), 49 states have internal predecessors, (4659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:10,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:34:10,199 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 7, 1, 1, 1, 1, 1, 1] [2023-08-30 11:34:10,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2023-08-30 11:34:10,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2023-08-30 11:34:10,399 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:34:10,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:34:10,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1799380301, now seen corresponding path program 7 times [2023-08-30 11:34:10,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:34:10,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139750223] [2023-08-30 11:34:10,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:34:10,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:34:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:34:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:11,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:34:11,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139750223] [2023-08-30 11:34:11,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139750223] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:34:11,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152838581] [2023-08-30 11:34:11,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:34:11,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:34:11,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:34:11,115 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:34:11,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-08-30 11:34:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:34:11,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-30 11:34:11,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:34:11,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:34:11,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:34:11,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 11:34:11,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:34:11,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:34:12,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:34:12,028 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 11:34:12,255 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:12,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:34:12,499 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3109 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3109) c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 28)) 9223372039002259456))) is different from false [2023-08-30 11:34:12,719 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 11:34:12,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 42 [2023-08-30 11:34:12,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:34:12,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 147 [2023-08-30 11:34:12,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2023-08-30 11:34:12,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-08-30 11:34:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:13,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152838581] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:34:13,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:34:13,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 59 [2023-08-30 11:34:13,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943031973] [2023-08-30 11:34:13,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:34:13,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-08-30 11:34:13,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:34:13,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-08-30 11:34:13,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3328, Unknown=27, NotChecked=116, Total=3660 [2023-08-30 11:34:13,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:34:13,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 157 transitions, 1987 flow. Second operand has 61 states, 61 states have (on average 78.08196721311475) internal successors, (4763), 61 states have internal predecessors, (4763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:13,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:34:13,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:34:13,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:34:17,020 INFO L130 PetriNetUnfolder]: 6466/12575 cut-off events. [2023-08-30 11:34:17,020 INFO L131 PetriNetUnfolder]: For 66490/67435 co-relation queries the response was YES. [2023-08-30 11:34:17,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96405 conditions, 12575 events. 6466/12575 cut-off events. For 66490/67435 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 103153 event pairs, 3647 based on Foata normal form. 991/13530 useless extension candidates. Maximal degree in co-relation 96349. Up to 5165 conditions per place. [2023-08-30 11:34:17,143 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 403 selfloop transitions, 53 changer transitions 0/458 dead transitions. [2023-08-30 11:34:17,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 458 transitions, 5854 flow [2023-08-30 11:34:17,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 11:34:17,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 11:34:17,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1835 transitions. [2023-08-30 11:34:17,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33768862716231135 [2023-08-30 11:34:17,145 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1835 transitions. [2023-08-30 11:34:17,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1835 transitions. [2023-08-30 11:34:17,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:34:17,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1835 transitions. [2023-08-30 11:34:17,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 83.4090909090909) internal successors, (1835), 22 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:17,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 247.0) internal successors, (5681), 23 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:17,148 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 247.0) internal successors, (5681), 23 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:17,148 INFO L175 Difference]: Start difference. First operand has 312 places, 157 transitions, 1987 flow. Second operand 22 states and 1835 transitions. [2023-08-30 11:34:17,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 458 transitions, 5854 flow [2023-08-30 11:34:17,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 458 transitions, 5695 flow, removed 17 selfloop flow, removed 21 redundant places. [2023-08-30 11:34:17,404 INFO L231 Difference]: Finished difference. Result has 307 places, 156 transitions, 1907 flow [2023-08-30 11:34:17,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1801, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1907, PETRI_PLACES=307, PETRI_TRANSITIONS=156} [2023-08-30 11:34:17,404 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 270 predicate places. [2023-08-30 11:34:17,404 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 156 transitions, 1907 flow [2023-08-30 11:34:17,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 78.08196721311475) internal successors, (4763), 61 states have internal predecessors, (4763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:17,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:34:17,405 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2023-08-30 11:34:17,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2023-08-30 11:34:17,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2023-08-30 11:34:17,605 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:34:17,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:34:17,606 INFO L85 PathProgramCache]: Analyzing trace with hash -886601284, now seen corresponding path program 10 times [2023-08-30 11:34:17,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:34:17,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959951428] [2023-08-30 11:34:17,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:34:17,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:34:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:34:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:18,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:34:18,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959951428] [2023-08-30 11:34:18,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959951428] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:34:18,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337805684] [2023-08-30 11:34:18,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:34:18,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:34:18,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:34:18,407 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:34:18,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-08-30 11:34:18,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:34:18,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:34:18,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-30 11:34:18,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:34:18,996 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 11:34:19,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:34:19,031 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 11:34:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:19,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:34:19,447 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:34:19,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-08-30 11:34:19,455 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:34:19,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2023-08-30 11:34:19,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-08-30 11:34:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:19,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337805684] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:34:19,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:34:19,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 50 [2023-08-30 11:34:19,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004083008] [2023-08-30 11:34:19,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:34:19,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-08-30 11:34:19,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:34:19,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-08-30 11:34:19,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2484, Unknown=9, NotChecked=0, Total=2652 [2023-08-30 11:34:22,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 247 [2023-08-30 11:34:22,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 156 transitions, 1907 flow. Second operand has 52 states, 52 states have (on average 93.0576923076923) internal successors, (4839), 52 states have internal predecessors, (4839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:22,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:34:22,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 247 [2023-08-30 11:34:22,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:34:25,636 INFO L130 PetriNetUnfolder]: 6442/12508 cut-off events. [2023-08-30 11:34:25,636 INFO L131 PetriNetUnfolder]: For 74681/75654 co-relation queries the response was YES. [2023-08-30 11:34:25,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95167 conditions, 12508 events. 6442/12508 cut-off events. For 74681/75654 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 101071 event pairs, 5097 based on Foata normal form. 967/13459 useless extension candidates. Maximal degree in co-relation 95113. Up to 9271 conditions per place. [2023-08-30 11:34:25,762 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 165 selfloop transitions, 49 changer transitions 0/216 dead transitions. [2023-08-30 11:34:25,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 216 transitions, 2961 flow [2023-08-30 11:34:25,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 11:34:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 11:34:25,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2292 transitions. [2023-08-30 11:34:25,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866396761133603 [2023-08-30 11:34:25,764 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2292 transitions. [2023-08-30 11:34:25,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2292 transitions. [2023-08-30 11:34:25,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:34:25,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2292 transitions. [2023-08-30 11:34:25,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 95.5) internal successors, (2292), 24 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:25,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 247.0) internal successors, (6175), 25 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:25,768 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 247.0) internal successors, (6175), 25 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:25,768 INFO L175 Difference]: Start difference. First operand has 307 places, 156 transitions, 1907 flow. Second operand 24 states and 2292 transitions. [2023-08-30 11:34:25,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 216 transitions, 2961 flow [2023-08-30 11:34:25,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 216 transitions, 2859 flow, removed 3 selfloop flow, removed 19 redundant places. [2023-08-30 11:34:25,917 INFO L231 Difference]: Finished difference. Result has 321 places, 179 transitions, 2206 flow [2023-08-30 11:34:25,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1807, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2206, PETRI_PLACES=321, PETRI_TRANSITIONS=179} [2023-08-30 11:34:25,918 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 284 predicate places. [2023-08-30 11:34:25,918 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 179 transitions, 2206 flow [2023-08-30 11:34:25,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 93.0576923076923) internal successors, (4839), 52 states have internal predecessors, (4839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:25,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:34:25,919 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2023-08-30 11:34:25,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2023-08-30 11:34:26,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2023-08-30 11:34:26,119 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:34:26,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:34:26,120 INFO L85 PathProgramCache]: Analyzing trace with hash -886601283, now seen corresponding path program 10 times [2023-08-30 11:34:26,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:34:26,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919485437] [2023-08-30 11:34:26,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:34:26,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:34:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:34:26,915 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:26,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:34:26,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919485437] [2023-08-30 11:34:26,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919485437] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:34:26,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524246973] [2023-08-30 11:34:26,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:34:26,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:34:26,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:34:26,916 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:34:26,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-08-30 11:34:27,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:34:27,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:34:27,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-30 11:34:27,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:34:27,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:34:27,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:34:27,544 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 11:34:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:27,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:34:27,864 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3231 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_3231) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 32 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-30 11:34:27,869 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:34:27,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-08-30 11:34:27,874 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:34:27,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2023-08-30 11:34:27,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-08-30 11:34:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2023-08-30 11:34:28,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524246973] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:34:28,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:34:28,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 50 [2023-08-30 11:34:28,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957596906] [2023-08-30 11:34:28,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:34:28,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-08-30 11:34:28,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:34:28,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-08-30 11:34:28,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2396, Unknown=1, NotChecked=98, Total=2652 [2023-08-30 11:34:28,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 11:34:28,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 179 transitions, 2206 flow. Second operand has 52 states, 52 states have (on average 81.0576923076923) internal successors, (4215), 52 states have internal predecessors, (4215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:28,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:34:28,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 11:34:28,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:34:31,127 INFO L130 PetriNetUnfolder]: 6418/12439 cut-off events. [2023-08-30 11:34:31,127 INFO L131 PetriNetUnfolder]: For 73989/74939 co-relation queries the response was YES. [2023-08-30 11:34:31,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94219 conditions, 12439 events. 6418/12439 cut-off events. For 73989/74939 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 100205 event pairs, 5007 based on Foata normal form. 948/13367 useless extension candidates. Maximal degree in co-relation 94156. Up to 9200 conditions per place. [2023-08-30 11:34:31,269 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 164 selfloop transitions, 48 changer transitions 0/214 dead transitions. [2023-08-30 11:34:31,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 214 transitions, 3004 flow [2023-08-30 11:34:31,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 11:34:31,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 11:34:31,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2003 transitions. [2023-08-30 11:34:31,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33788798920377866 [2023-08-30 11:34:31,271 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2003 transitions. [2023-08-30 11:34:31,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2003 transitions. [2023-08-30 11:34:31,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:34:31,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2003 transitions. [2023-08-30 11:34:31,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 83.45833333333333) internal successors, (2003), 24 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:31,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 247.0) internal successors, (6175), 25 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:31,275 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 247.0) internal successors, (6175), 25 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:31,275 INFO L175 Difference]: Start difference. First operand has 321 places, 179 transitions, 2206 flow. Second operand 24 states and 2003 transitions. [2023-08-30 11:34:31,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 214 transitions, 3004 flow [2023-08-30 11:34:31,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 214 transitions, 2870 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-08-30 11:34:31,423 INFO L231 Difference]: Finished difference. Result has 331 places, 177 transitions, 2132 flow [2023-08-30 11:34:31,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2036, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2132, PETRI_PLACES=331, PETRI_TRANSITIONS=177} [2023-08-30 11:34:31,423 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 294 predicate places. [2023-08-30 11:34:31,423 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 177 transitions, 2132 flow [2023-08-30 11:34:31,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 81.0576923076923) internal successors, (4215), 52 states have internal predecessors, (4215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:31,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:34:31,424 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:34:31,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2023-08-30 11:34:31,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-08-30 11:34:31,624 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:34:31,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:34:31,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1906296830, now seen corresponding path program 11 times [2023-08-30 11:34:31,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:34:31,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865617803] [2023-08-30 11:34:31,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:34:31,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:34:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:34:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:32,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:34:32,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865617803] [2023-08-30 11:34:32,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865617803] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:34:32,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109288291] [2023-08-30 11:34:32,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:34:32,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:34:32,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:34:32,232 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:34:32,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-08-30 11:34:32,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-30 11:34:32,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:34:32,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 11:34:32,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:34:32,875 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 11:34:32,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:34:32,917 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 11:34:32,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:34:32,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:34:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:33,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:34:33,566 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:34:33,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 11:34:33,572 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:34:33,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 129 [2023-08-30 11:34:33,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 11:34:33,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-30 11:34:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:33,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109288291] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:34:33,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:34:33,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2023-08-30 11:34:33,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845142991] [2023-08-30 11:34:33,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:34:33,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-08-30 11:34:33,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:34:33,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-08-30 11:34:33,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2992, Unknown=16, NotChecked=0, Total=3192 [2023-08-30 11:34:33,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:34:33,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 177 transitions, 2132 flow. Second operand has 57 states, 57 states have (on average 78.12280701754386) internal successors, (4453), 57 states have internal predecessors, (4453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:33,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:34:33,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:34:33,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:34:37,253 INFO L130 PetriNetUnfolder]: 6328/12253 cut-off events. [2023-08-30 11:34:37,253 INFO L131 PetriNetUnfolder]: For 77345/77558 co-relation queries the response was YES. [2023-08-30 11:34:37,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91342 conditions, 12253 events. 6328/12253 cut-off events. For 77345/77558 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 99676 event pairs, 944 based on Foata normal form. 511/12760 useless extension candidates. Maximal degree in co-relation 91281. Up to 2955 conditions per place. [2023-08-30 11:34:37,396 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 569 selfloop transitions, 32 changer transitions 0/605 dead transitions. [2023-08-30 11:34:37,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 605 transitions, 9376 flow [2023-08-30 11:34:37,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 11:34:37,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 11:34:37,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1820 transitions. [2023-08-30 11:34:37,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3349282296650718 [2023-08-30 11:34:37,398 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1820 transitions. [2023-08-30 11:34:37,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1820 transitions. [2023-08-30 11:34:37,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:34:37,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1820 transitions. [2023-08-30 11:34:37,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 82.72727272727273) internal successors, (1820), 22 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:37,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 247.0) internal successors, (5681), 23 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:37,402 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 247.0) internal successors, (5681), 23 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:37,402 INFO L175 Difference]: Start difference. First operand has 331 places, 177 transitions, 2132 flow. Second operand 22 states and 1820 transitions. [2023-08-30 11:34:37,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 605 transitions, 9376 flow [2023-08-30 11:34:37,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 605 transitions, 9276 flow, removed 15 selfloop flow, removed 21 redundant places. [2023-08-30 11:34:37,575 INFO L231 Difference]: Finished difference. Result has 333 places, 178 transitions, 2159 flow [2023-08-30 11:34:37,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2060, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2159, PETRI_PLACES=333, PETRI_TRANSITIONS=178} [2023-08-30 11:34:37,576 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 296 predicate places. [2023-08-30 11:34:37,576 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 178 transitions, 2159 flow [2023-08-30 11:34:37,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 78.12280701754386) internal successors, (4453), 57 states have internal predecessors, (4453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:37,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:34:37,576 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 7, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:34:37,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2023-08-30 11:34:37,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:34:37,777 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:34:37,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:34:37,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1914262264, now seen corresponding path program 10 times [2023-08-30 11:34:37,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:34:37,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361751665] [2023-08-30 11:34:37,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:34:37,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:34:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:34:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:38,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:34:38,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361751665] [2023-08-30 11:34:38,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361751665] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:34:38,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111194701] [2023-08-30 11:34:38,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:34:38,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:34:38,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:34:38,489 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:34:38,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-08-30 11:34:38,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:34:38,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:34:38,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-30 11:34:38,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:34:39,147 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 11:34:39,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-08-30 11:34:39,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:34:39,238 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 11:34:39,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:34:39,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:34:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:39,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:34:39,823 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3360 (Array Int Int)) (v_ArrVal_3361 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_3360) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3361) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 28 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296))) is different from false [2023-08-30 11:34:39,914 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:34:39,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 43 [2023-08-30 11:34:39,920 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:34:39,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 75 [2023-08-30 11:34:39,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2023-08-30 11:34:39,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-08-30 11:34:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2023-08-30 11:34:40,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111194701] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:34:40,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:34:40,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2023-08-30 11:34:40,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412309041] [2023-08-30 11:34:40,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:34:40,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-08-30 11:34:40,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:34:40,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-08-30 11:34:40,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=3212, Unknown=20, NotChecked=114, Total=3540 [2023-08-30 11:34:40,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:34:40,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 178 transitions, 2159 flow. Second operand has 60 states, 60 states have (on average 78.11666666666666) internal successors, (4687), 60 states have internal predecessors, (4687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:40,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:34:40,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:34:40,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:34:46,456 INFO L130 PetriNetUnfolder]: 11117/21528 cut-off events. [2023-08-30 11:34:46,456 INFO L131 PetriNetUnfolder]: For 146124/146327 co-relation queries the response was YES. [2023-08-30 11:34:46,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169246 conditions, 21528 events. 11117/21528 cut-off events. For 146124/146327 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 191897 event pairs, 1601 based on Foata normal form. 617/22141 useless extension candidates. Maximal degree in co-relation 169183. Up to 5071 conditions per place. [2023-08-30 11:34:46,864 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 992 selfloop transitions, 49 changer transitions 0/1045 dead transitions. [2023-08-30 11:34:46,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 1045 transitions, 16236 flow [2023-08-30 11:34:46,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-30 11:34:46,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-30 11:34:46,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3772 transitions. [2023-08-30 11:34:46,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3393612235717499 [2023-08-30 11:34:46,867 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3772 transitions. [2023-08-30 11:34:46,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3772 transitions. [2023-08-30 11:34:46,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:34:46,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3772 transitions. [2023-08-30 11:34:46,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 83.82222222222222) internal successors, (3772), 45 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:46,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 247.0) internal successors, (11362), 46 states have internal predecessors, (11362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:46,874 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 247.0) internal successors, (11362), 46 states have internal predecessors, (11362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:46,874 INFO L175 Difference]: Start difference. First operand has 333 places, 178 transitions, 2159 flow. Second operand 45 states and 3772 transitions. [2023-08-30 11:34:46,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 1045 transitions, 16236 flow [2023-08-30 11:34:47,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 1045 transitions, 16119 flow, removed 5 selfloop flow, removed 21 redundant places. [2023-08-30 11:34:47,317 INFO L231 Difference]: Finished difference. Result has 357 places, 192 transitions, 2304 flow [2023-08-30 11:34:47,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2304, PETRI_PLACES=357, PETRI_TRANSITIONS=192} [2023-08-30 11:34:47,318 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 320 predicate places. [2023-08-30 11:34:47,318 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 192 transitions, 2304 flow [2023-08-30 11:34:47,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 78.11666666666666) internal successors, (4687), 60 states have internal predecessors, (4687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:47,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:34:47,319 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1] [2023-08-30 11:34:47,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-08-30 11:34:47,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:34:47,526 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:34:47,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:34:47,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1256957630, now seen corresponding path program 8 times [2023-08-30 11:34:47,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:34:47,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120127423] [2023-08-30 11:34:47,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:34:47,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:34:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:34:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:48,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:34:48,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120127423] [2023-08-30 11:34:48,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120127423] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:34:48,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423183418] [2023-08-30 11:34:48,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:34:48,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:34:48,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:34:48,375 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:34:48,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-08-30 11:34:48,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:34:48,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:34:48,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-30 11:34:48,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:34:49,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 11:34:49,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:34:49,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:34:49,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:34:49,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:34:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:49,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:34:49,772 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3427 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3427) c_~A~0.base) (+ c_~A~0.offset 32)) 9223372039002259456))) is different from false [2023-08-30 11:34:49,844 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:34:49,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 11:34:49,851 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:34:49,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 147 [2023-08-30 11:34:49,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-08-30 11:34:49,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2023-08-30 11:34:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:50,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423183418] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:34:50,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:34:50,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 63 [2023-08-30 11:34:50,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058202386] [2023-08-30 11:34:50,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:34:50,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-08-30 11:34:50,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:34:50,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-08-30 11:34:50,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=3799, Unknown=10, NotChecked=124, Total=4160 [2023-08-30 11:34:50,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:34:50,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 192 transitions, 2304 flow. Second operand has 65 states, 65 states have (on average 78.06153846153846) internal successors, (5074), 65 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:50,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:34:50,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:34:50,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:34:57,071 INFO L130 PetriNetUnfolder]: 10566/20501 cut-off events. [2023-08-30 11:34:57,071 INFO L131 PetriNetUnfolder]: For 102640/104328 co-relation queries the response was YES. [2023-08-30 11:34:57,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160314 conditions, 20501 events. 10566/20501 cut-off events. For 102640/104328 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 181041 event pairs, 5960 based on Foata normal form. 1774/22200 useless extension candidates. Maximal degree in co-relation 160252. Up to 7698 conditions per place. [2023-08-30 11:34:57,411 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 501 selfloop transitions, 37 changer transitions 0/541 dead transitions. [2023-08-30 11:34:57,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 541 transitions, 7295 flow [2023-08-30 11:34:57,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 11:34:57,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 11:34:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1930 transitions. [2023-08-30 11:34:57,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33972892096461893 [2023-08-30 11:34:57,413 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1930 transitions. [2023-08-30 11:34:57,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1930 transitions. [2023-08-30 11:34:57,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:34:57,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1930 transitions. [2023-08-30 11:34:57,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 83.91304347826087) internal successors, (1930), 23 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:57,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:57,417 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:57,417 INFO L175 Difference]: Start difference. First operand has 357 places, 192 transitions, 2304 flow. Second operand 23 states and 1930 transitions. [2023-08-30 11:34:57,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 541 transitions, 7295 flow [2023-08-30 11:34:57,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 541 transitions, 7061 flow, removed 28 selfloop flow, removed 21 redundant places. [2023-08-30 11:34:57,712 INFO L231 Difference]: Finished difference. Result has 360 places, 193 transitions, 2348 flow [2023-08-30 11:34:57,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2230, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2348, PETRI_PLACES=360, PETRI_TRANSITIONS=193} [2023-08-30 11:34:57,712 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 323 predicate places. [2023-08-30 11:34:57,712 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 193 transitions, 2348 flow [2023-08-30 11:34:57,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 78.06153846153846) internal successors, (5074), 65 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:57,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:34:57,713 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:34:57,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2023-08-30 11:34:57,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-08-30 11:34:57,913 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:34:57,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:34:57,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1034342873, now seen corresponding path program 12 times [2023-08-30 11:34:57,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:34:57,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617156886] [2023-08-30 11:34:57,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:34:57,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:34:57,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:34:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:58,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:34:58,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617156886] [2023-08-30 11:34:58,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617156886] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:34:58,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636115037] [2023-08-30 11:34:58,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:34:58,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:34:58,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:34:58,178 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:34:58,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-08-30 11:34:58,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-30 11:34:58,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:34:58,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 11:34:58,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:34:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:59,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:34:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:59,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636115037] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:34:59,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:34:59,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 47 [2023-08-30 11:34:59,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222730054] [2023-08-30 11:34:59,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:34:59,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-30 11:34:59,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:34:59,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-30 11:34:59,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2023-08-30 11:34:59,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 11:34:59,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 193 transitions, 2348 flow. Second operand has 49 states, 49 states have (on average 95.12244897959184) internal successors, (4661), 49 states have internal predecessors, (4661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:59,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:34:59,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 11:34:59,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:35:03,999 INFO L130 PetriNetUnfolder]: 10770/20957 cut-off events. [2023-08-30 11:35:03,999 INFO L131 PetriNetUnfolder]: For 133365/133853 co-relation queries the response was YES. [2023-08-30 11:35:04,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161863 conditions, 20957 events. 10770/20957 cut-off events. For 133365/133853 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 183915 event pairs, 5332 based on Foata normal form. 672/21621 useless extension candidates. Maximal degree in co-relation 161800. Up to 11420 conditions per place. [2023-08-30 11:35:04,232 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 127 selfloop transitions, 18 changer transitions 260/407 dead transitions. [2023-08-30 11:35:04,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 407 transitions, 5513 flow [2023-08-30 11:35:04,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 11:35:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 11:35:04,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2170 transitions. [2023-08-30 11:35:04,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3993375046006625 [2023-08-30 11:35:04,234 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2170 transitions. [2023-08-30 11:35:04,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2170 transitions. [2023-08-30 11:35:04,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:35:04,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2170 transitions. [2023-08-30 11:35:04,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 98.63636363636364) internal successors, (2170), 22 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:04,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 247.0) internal successors, (5681), 23 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:04,237 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 247.0) internal successors, (5681), 23 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:04,237 INFO L175 Difference]: Start difference. First operand has 360 places, 193 transitions, 2348 flow. Second operand 22 states and 2170 transitions. [2023-08-30 11:35:04,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 407 transitions, 5513 flow [2023-08-30 11:35:04,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 407 transitions, 5332 flow, removed 7 selfloop flow, removed 24 redundant places. [2023-08-30 11:35:04,505 INFO L231 Difference]: Finished difference. Result has 357 places, 126 transitions, 1612 flow [2023-08-30 11:35:04,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1612, PETRI_PLACES=357, PETRI_TRANSITIONS=126} [2023-08-30 11:35:04,505 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 320 predicate places. [2023-08-30 11:35:04,505 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 126 transitions, 1612 flow [2023-08-30 11:35:04,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 95.12244897959184) internal successors, (4661), 49 states have internal predecessors, (4661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:04,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:35:04,506 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1] [2023-08-30 11:35:04,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-08-30 11:35:04,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:35:04,707 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:35:04,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:35:04,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1256957629, now seen corresponding path program 10 times [2023-08-30 11:35:04,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:35:04,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622560829] [2023-08-30 11:35:04,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:35:04,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:35:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:35:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:05,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:35:05,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622560829] [2023-08-30 11:35:05,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622560829] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:35:05,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253323482] [2023-08-30 11:35:05,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:35:05,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:35:05,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:35:05,617 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:35:05,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-08-30 11:35:06,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:35:06,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:35:06,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-30 11:35:06,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:35:06,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:35:06,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:35:06,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:35:06,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:35:06,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:35:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:06,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:35:06,732 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3551 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3551) c_~A~0.base) (+ c_~A~0.offset 32)) 4294967296)) is different from false [2023-08-30 11:35:06,800 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:35:06,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 11:35:06,806 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:35:06,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 129 [2023-08-30 11:35:06,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-30 11:35:06,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 11:35:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:07,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253323482] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:35:07,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:35:07,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 54 [2023-08-30 11:35:07,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391248967] [2023-08-30 11:35:07,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:35:07,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-08-30 11:35:07,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:35:07,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-08-30 11:35:07,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2788, Unknown=12, NotChecked=106, Total=3080 [2023-08-30 11:35:09,188 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 11:35:09,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:35:09,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 126 transitions, 1612 flow. Second operand has 56 states, 56 states have (on average 78.08928571428571) internal successors, (4373), 56 states have internal predecessors, (4373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:09,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:35:09,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:35:09,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:35:13,800 INFO L130 PetriNetUnfolder]: 9401/18266 cut-off events. [2023-08-30 11:35:13,801 INFO L131 PetriNetUnfolder]: For 104389/105944 co-relation queries the response was YES. [2023-08-30 11:35:13,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150453 conditions, 18266 events. 9401/18266 cut-off events. For 104389/105944 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 159371 event pairs, 5292 based on Foata normal form. 1641/19849 useless extension candidates. Maximal degree in co-relation 150392. Up to 7698 conditions per place. [2023-08-30 11:35:13,987 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 428 selfloop transitions, 37 changer transitions 0/467 dead transitions. [2023-08-30 11:35:13,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 467 transitions, 6377 flow [2023-08-30 11:35:13,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 11:35:13,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 11:35:13,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1917 transitions. [2023-08-30 11:35:13,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3374405914451681 [2023-08-30 11:35:13,989 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1917 transitions. [2023-08-30 11:35:13,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1917 transitions. [2023-08-30 11:35:13,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:35:13,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1917 transitions. [2023-08-30 11:35:13,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 83.34782608695652) internal successors, (1917), 23 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:13,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:13,992 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:13,992 INFO L175 Difference]: Start difference. First operand has 357 places, 126 transitions, 1612 flow. Second operand 23 states and 1917 transitions. [2023-08-30 11:35:13,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 467 transitions, 6377 flow [2023-08-30 11:35:15,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 467 transitions, 6089 flow, removed 23 selfloop flow, removed 34 redundant places. [2023-08-30 11:35:15,148 INFO L231 Difference]: Finished difference. Result has 301 places, 125 transitions, 1490 flow [2023-08-30 11:35:15,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1490, PETRI_PLACES=301, PETRI_TRANSITIONS=125} [2023-08-30 11:35:15,148 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 264 predicate places. [2023-08-30 11:35:15,148 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 125 transitions, 1490 flow [2023-08-30 11:35:15,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 78.08928571428571) internal successors, (4373), 56 states have internal predecessors, (4373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:15,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:35:15,149 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1] [2023-08-30 11:35:15,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2023-08-30 11:35:15,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:35:15,349 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:35:15,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:35:15,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1714833684, now seen corresponding path program 11 times [2023-08-30 11:35:15,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:35:15,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251928404] [2023-08-30 11:35:15,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:35:15,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:35:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:35:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:15,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:35:15,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251928404] [2023-08-30 11:35:15,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251928404] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:35:15,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405081737] [2023-08-30 11:35:15,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:35:15,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:35:15,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:35:15,697 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:35:15,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-08-30 11:35:16,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-30 11:35:16,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:35:16,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 11:35:16,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:35:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:16,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:35:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:16,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405081737] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:35:16,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:35:16,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 52 [2023-08-30 11:35:16,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985801751] [2023-08-30 11:35:16,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:35:16,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-08-30 11:35:16,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:35:16,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-08-30 11:35:16,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=2170, Unknown=0, NotChecked=0, Total=2862 [2023-08-30 11:35:17,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 11:35:17,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 125 transitions, 1490 flow. Second operand has 54 states, 54 states have (on average 95.07407407407408) internal successors, (5134), 54 states have internal predecessors, (5134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:17,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:35:17,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 11:35:17,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:35:20,386 INFO L130 PetriNetUnfolder]: 6962/13506 cut-off events. [2023-08-30 11:35:20,386 INFO L131 PetriNetUnfolder]: For 61921/63187 co-relation queries the response was YES. [2023-08-30 11:35:20,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105012 conditions, 13506 events. 6962/13506 cut-off events. For 61921/63187 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 111998 event pairs, 3440 based on Foata normal form. 1484/14987 useless extension candidates. Maximal degree in co-relation 104963. Up to 5104 conditions per place. [2023-08-30 11:35:20,532 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 403 selfloop transitions, 67 changer transitions 168/640 dead transitions. [2023-08-30 11:35:20,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 640 transitions, 8156 flow [2023-08-30 11:35:20,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 11:35:20,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 11:35:20,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3344 transitions. [2023-08-30 11:35:20,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2023-08-30 11:35:20,534 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3344 transitions. [2023-08-30 11:35:20,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3344 transitions. [2023-08-30 11:35:20,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:35:20,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3344 transitions. [2023-08-30 11:35:20,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 101.33333333333333) internal successors, (3344), 33 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:20,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 247.0) internal successors, (8398), 34 states have internal predecessors, (8398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:20,540 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 247.0) internal successors, (8398), 34 states have internal predecessors, (8398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:20,540 INFO L175 Difference]: Start difference. First operand has 301 places, 125 transitions, 1490 flow. Second operand 33 states and 3344 transitions. [2023-08-30 11:35:20,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 640 transitions, 8156 flow [2023-08-30 11:35:20,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 640 transitions, 8034 flow, removed 1 selfloop flow, removed 22 redundant places. [2023-08-30 11:35:20,670 INFO L231 Difference]: Finished difference. Result has 321 places, 165 transitions, 2165 flow [2023-08-30 11:35:20,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1383, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2165, PETRI_PLACES=321, PETRI_TRANSITIONS=165} [2023-08-30 11:35:20,670 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 284 predicate places. [2023-08-30 11:35:20,670 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 165 transitions, 2165 flow [2023-08-30 11:35:20,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 95.07407407407408) internal successors, (5134), 54 states have internal predecessors, (5134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:20,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:35:20,671 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:35:20,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-08-30 11:35:20,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:35:20,871 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:35:20,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:35:20,872 INFO L85 PathProgramCache]: Analyzing trace with hash -787409532, now seen corresponding path program 13 times [2023-08-30 11:35:20,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:35:20,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343261006] [2023-08-30 11:35:20,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:35:20,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:35:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:35:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:21,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:35:21,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343261006] [2023-08-30 11:35:21,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343261006] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:35:21,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872929123] [2023-08-30 11:35:21,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:35:21,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:35:21,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:35:21,698 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:35:21,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-08-30 11:35:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:35:22,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-30 11:35:22,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:35:22,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 11:35:22,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:35:22,456 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 11:35:22,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:35:22,495 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 11:35:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:22,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:35:23,276 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:35:23,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 11:35:23,282 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:35:23,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 65 [2023-08-30 11:35:23,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-08-30 11:35:23,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-08-30 11:35:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:23,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872929123] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:35:23,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:35:23,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 63 [2023-08-30 11:35:23,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195957316] [2023-08-30 11:35:23,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:35:23,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-08-30 11:35:23,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:35:23,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-08-30 11:35:23,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3914, Unknown=16, NotChecked=0, Total=4160 [2023-08-30 11:35:26,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:35:26,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 165 transitions, 2165 flow. Second operand has 65 states, 65 states have (on average 78.1076923076923) internal successors, (5077), 65 states have internal predecessors, (5077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:26,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:35:26,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:35:26,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:35:31,768 INFO L130 PetriNetUnfolder]: 8164/15841 cut-off events. [2023-08-30 11:35:31,768 INFO L131 PetriNetUnfolder]: For 98606/98839 co-relation queries the response was YES. [2023-08-30 11:35:31,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125417 conditions, 15841 events. 8164/15841 cut-off events. For 98606/98839 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 132996 event pairs, 1073 based on Foata normal form. 731/16568 useless extension candidates. Maximal degree in co-relation 125358. Up to 3339 conditions per place. [2023-08-30 11:35:31,919 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 610 selfloop transitions, 35 changer transitions 0/649 dead transitions. [2023-08-30 11:35:31,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 649 transitions, 11261 flow [2023-08-30 11:35:31,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 11:35:31,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 11:35:31,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1901 transitions. [2023-08-30 11:35:31,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3346241858827671 [2023-08-30 11:35:31,921 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1901 transitions. [2023-08-30 11:35:31,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1901 transitions. [2023-08-30 11:35:31,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:35:31,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1901 transitions. [2023-08-30 11:35:31,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 82.65217391304348) internal successors, (1901), 23 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:31,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:31,925 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:31,925 INFO L175 Difference]: Start difference. First operand has 321 places, 165 transitions, 2165 flow. Second operand 23 states and 1901 transitions. [2023-08-30 11:35:31,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 649 transitions, 11261 flow [2023-08-30 11:35:32,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 649 transitions, 10970 flow, removed 135 selfloop flow, removed 10 redundant places. [2023-08-30 11:35:32,058 INFO L231 Difference]: Finished difference. Result has 335 places, 167 transitions, 2228 flow [2023-08-30 11:35:32,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2112, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2228, PETRI_PLACES=335, PETRI_TRANSITIONS=167} [2023-08-30 11:35:32,059 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 298 predicate places. [2023-08-30 11:35:32,059 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 167 transitions, 2228 flow [2023-08-30 11:35:32,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 78.1076923076923) internal successors, (5077), 65 states have internal predecessors, (5077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:32,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:35:32,060 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:35:32,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-08-30 11:35:32,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2023-08-30 11:35:32,260 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:35:32,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:35:32,261 INFO L85 PathProgramCache]: Analyzing trace with hash -787409531, now seen corresponding path program 11 times [2023-08-30 11:35:32,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:35:32,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791847016] [2023-08-30 11:35:32,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:35:32,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:35:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:35:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:33,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:35:33,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791847016] [2023-08-30 11:35:33,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791847016] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:35:33,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145594497] [2023-08-30 11:35:33,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:35:33,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:35:33,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:35:33,018 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:35:33,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-08-30 11:35:33,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-30 11:35:33,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:35:33,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-30 11:35:33,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:35:33,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:35:33,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:35:33,836 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 11:35:33,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:35:33,879 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 11:35:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:33,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:35:34,242 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3741 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3741) c_~A~0.base) (+ c_~A~0.offset 32)) 4294967296))) is different from false [2023-08-30 11:35:34,249 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3740 (Array Int Int)) (v_ArrVal_3741 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_3740) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3741) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 32 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296))) is different from false [2023-08-30 11:35:34,255 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:35:34,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 11:35:34,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:35:34,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 75 [2023-08-30 11:35:34,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2023-08-30 11:35:34,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-08-30 11:35:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2023-08-30 11:35:34,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145594497] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:35:34,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:35:34,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 53 [2023-08-30 11:35:34,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948318334] [2023-08-30 11:35:34,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:35:34,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-08-30 11:35:34,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:35:34,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-08-30 11:35:34,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2594, Unknown=2, NotChecked=206, Total=2970 [2023-08-30 11:35:34,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:35:34,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 167 transitions, 2228 flow. Second operand has 55 states, 55 states have (on average 78.10909090909091) internal successors, (4296), 55 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:34,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:35:34,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:35:34,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:35:38,776 INFO L130 PetriNetUnfolder]: 7838/15211 cut-off events. [2023-08-30 11:35:38,776 INFO L131 PetriNetUnfolder]: For 97240/97463 co-relation queries the response was YES. [2023-08-30 11:35:39,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124043 conditions, 15211 events. 7838/15211 cut-off events. For 97240/97463 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 127013 event pairs, 1073 based on Foata normal form. 527/15734 useless extension candidates. Maximal degree in co-relation 123981. Up to 3335 conditions per place. [2023-08-30 11:35:39,179 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 608 selfloop transitions, 36 changer transitions 0/648 dead transitions. [2023-08-30 11:35:39,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 648 transitions, 11038 flow [2023-08-30 11:35:39,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 11:35:39,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 11:35:39,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1899 transitions. [2023-08-30 11:35:39,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.334272135187467 [2023-08-30 11:35:39,182 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1899 transitions. [2023-08-30 11:35:39,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1899 transitions. [2023-08-30 11:35:39,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:35:39,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1899 transitions. [2023-08-30 11:35:39,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 82.56521739130434) internal successors, (1899), 23 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:39,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:39,186 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:39,186 INFO L175 Difference]: Start difference. First operand has 335 places, 167 transitions, 2228 flow. Second operand 23 states and 1899 transitions. [2023-08-30 11:35:39,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 648 transitions, 11038 flow [2023-08-30 11:35:39,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 648 transitions, 10957 flow, removed 4 selfloop flow, removed 21 redundant places. [2023-08-30 11:35:39,343 INFO L231 Difference]: Finished difference. Result has 336 places, 166 transitions, 2201 flow [2023-08-30 11:35:39,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2129, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2201, PETRI_PLACES=336, PETRI_TRANSITIONS=166} [2023-08-30 11:35:39,344 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 299 predicate places. [2023-08-30 11:35:39,344 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 166 transitions, 2201 flow [2023-08-30 11:35:39,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 78.10909090909091) internal successors, (4296), 55 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:39,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:35:39,345 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2023-08-30 11:35:39,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2023-08-30 11:35:39,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:35:39,546 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:35:39,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:35:39,546 INFO L85 PathProgramCache]: Analyzing trace with hash 758381207, now seen corresponding path program 12 times [2023-08-30 11:35:39,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:35:39,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421794177] [2023-08-30 11:35:39,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:35:39,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:35:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:35:40,271 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:40,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:35:40,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421794177] [2023-08-30 11:35:40,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421794177] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:35:40,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267905349] [2023-08-30 11:35:40,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:35:40,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:35:40,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:35:40,273 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:35:40,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-08-30 11:35:41,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-08-30 11:35:41,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:35:41,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-30 11:35:41,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:35:41,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 11:35:41,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:35:41,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:35:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:42,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:35:43,042 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:35:43,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-08-30 11:35:43,049 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:35:43,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 33 [2023-08-30 11:35:43,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-08-30 11:35:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:35:44,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267905349] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:35:44,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:35:44,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 66 [2023-08-30 11:35:44,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302236012] [2023-08-30 11:35:44,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:35:44,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-08-30 11:35:44,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:35:44,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-08-30 11:35:44,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=4099, Unknown=0, NotChecked=0, Total=4556 [2023-08-30 11:35:50,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 247 [2023-08-30 11:35:50,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 166 transitions, 2201 flow. Second operand has 68 states, 68 states have (on average 85.05882352941177) internal successors, (5784), 68 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:50,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:35:50,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 247 [2023-08-30 11:35:50,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:35:51,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 11:36:08,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 11:36:11,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 11:36:17,355 INFO L130 PetriNetUnfolder]: 13155/23865 cut-off events. [2023-08-30 11:36:17,356 INFO L131 PetriNetUnfolder]: For 156594/158345 co-relation queries the response was YES. [2023-08-30 11:36:17,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211197 conditions, 23865 events. 13155/23865 cut-off events. For 156594/158345 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 198345 event pairs, 6187 based on Foata normal form. 1995/25852 useless extension candidates. Maximal degree in co-relation 211136. Up to 5988 conditions per place. [2023-08-30 11:36:17,719 INFO L137 encePairwiseOnDemand]: 237/247 looper letters, 562 selfloop transitions, 258 changer transitions 96/918 dead transitions. [2023-08-30 11:36:17,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 918 transitions, 12989 flow [2023-08-30 11:36:17,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-08-30 11:36:17,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2023-08-30 11:36:17,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 10712 transitions. [2023-08-30 11:36:17,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3554788610871441 [2023-08-30 11:36:17,725 INFO L72 ComplementDD]: Start complementDD. Operand 122 states and 10712 transitions. [2023-08-30 11:36:17,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 10712 transitions. [2023-08-30 11:36:17,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:36:17,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 122 states and 10712 transitions. [2023-08-30 11:36:17,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 123 states, 122 states have (on average 87.80327868852459) internal successors, (10712), 122 states have internal predecessors, (10712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:36:17,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 123 states, 123 states have (on average 247.0) internal successors, (30381), 123 states have internal predecessors, (30381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:36:17,911 INFO L81 ComplementDD]: Finished complementDD. Result has 123 states, 123 states have (on average 247.0) internal successors, (30381), 123 states have internal predecessors, (30381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:36:17,911 INFO L175 Difference]: Start difference. First operand has 336 places, 166 transitions, 2201 flow. Second operand 122 states and 10712 transitions. [2023-08-30 11:36:17,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 918 transitions, 12989 flow [2023-08-30 11:36:18,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 918 transitions, 12537 flow, removed 5 selfloop flow, removed 20 redundant places. [2023-08-30 11:36:18,308 INFO L231 Difference]: Finished difference. Result has 461 places, 338 transitions, 5140 flow [2023-08-30 11:36:18,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2138, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=122, PETRI_FLOW=5140, PETRI_PLACES=461, PETRI_TRANSITIONS=338} [2023-08-30 11:36:18,309 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 424 predicate places. [2023-08-30 11:36:18,309 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 338 transitions, 5140 flow [2023-08-30 11:36:18,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 85.05882352941177) internal successors, (5784), 68 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:36:18,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:36:18,310 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2023-08-30 11:36:18,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2023-08-30 11:36:18,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:36:18,510 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:36:18,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:36:18,511 INFO L85 PathProgramCache]: Analyzing trace with hash 758381206, now seen corresponding path program 11 times [2023-08-30 11:36:18,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:36:18,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121341762] [2023-08-30 11:36:18,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:36:18,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:36:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:36:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:36:19,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:36:19,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121341762] [2023-08-30 11:36:19,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121341762] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:36:19,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518411457] [2023-08-30 11:36:19,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:36:19,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:36:19,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:36:19,262 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:36:19,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-08-30 11:36:19,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-30 11:36:19,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:36:19,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-30 11:36:19,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:36:20,046 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 11:36:20,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:36:20,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:36:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:36:20,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:36:20,851 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3871 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_3871) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 36 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2023-08-30 11:36:20,857 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:36:20,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-08-30 11:36:20,862 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:36:20,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2023-08-30 11:36:20,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-08-30 11:36:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2023-08-30 11:36:21,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518411457] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:36:21,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:36:21,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 64 [2023-08-30 11:36:21,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020280960] [2023-08-30 11:36:21,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:36:21,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-08-30 11:36:21,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:36:21,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-08-30 11:36:21,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=3954, Unknown=1, NotChecked=126, Total=4290 [2023-08-30 11:36:21,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 11:36:21,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 338 transitions, 5140 flow. Second operand has 66 states, 66 states have (on average 81.06060606060606) internal successors, (5350), 66 states have internal predecessors, (5350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:36:21,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:36:21,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 11:36:21,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:36:27,444 INFO L130 PetriNetUnfolder]: 13106/23715 cut-off events. [2023-08-30 11:36:27,444 INFO L131 PetriNetUnfolder]: For 185186/186892 co-relation queries the response was YES. [2023-08-30 11:36:27,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215292 conditions, 23715 events. 13106/23715 cut-off events. For 185186/186892 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 194206 event pairs, 9371 based on Foata normal form. 1702/25383 useless extension candidates. Maximal degree in co-relation 215207. Up to 15684 conditions per place. [2023-08-30 11:36:27,819 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 244 selfloop transitions, 127 changer transitions 8/381 dead transitions. [2023-08-30 11:36:27,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 381 transitions, 6394 flow [2023-08-30 11:36:27,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 11:36:27,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 11:36:27,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2250 transitions. [2023-08-30 11:36:27,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33738191632928477 [2023-08-30 11:36:27,821 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2250 transitions. [2023-08-30 11:36:27,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2250 transitions. [2023-08-30 11:36:27,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:36:27,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2250 transitions. [2023-08-30 11:36:27,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 83.33333333333333) internal successors, (2250), 27 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:36:27,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 247.0) internal successors, (6916), 28 states have internal predecessors, (6916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:36:27,826 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 247.0) internal successors, (6916), 28 states have internal predecessors, (6916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:36:27,826 INFO L175 Difference]: Start difference. First operand has 461 places, 338 transitions, 5140 flow. Second operand 27 states and 2250 transitions. [2023-08-30 11:36:27,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 381 transitions, 6394 flow [2023-08-30 11:36:28,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 381 transitions, 5918 flow, removed 114 selfloop flow, removed 30 redundant places. [2023-08-30 11:36:28,528 INFO L231 Difference]: Finished difference. Result has 457 places, 337 transitions, 4888 flow [2023-08-30 11:36:28,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=4634, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4888, PETRI_PLACES=457, PETRI_TRANSITIONS=337} [2023-08-30 11:36:28,529 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 420 predicate places. [2023-08-30 11:36:28,529 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 337 transitions, 4888 flow [2023-08-30 11:36:28,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 81.06060606060606) internal successors, (5350), 66 states have internal predecessors, (5350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:36:28,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:36:28,530 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1] [2023-08-30 11:36:28,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2023-08-30 11:36:28,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:36:28,737 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:36:28,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:36:28,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1027676297, now seen corresponding path program 11 times [2023-08-30 11:36:28,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:36:28,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898271621] [2023-08-30 11:36:28,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:36:28,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:36:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:36:29,662 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:36:29,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:36:29,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898271621] [2023-08-30 11:36:29,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898271621] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:36:29,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567324477] [2023-08-30 11:36:29,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:36:29,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:36:29,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:36:29,664 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:36:29,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-08-30 11:36:30,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-30 11:36:30,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:36:30,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-30 11:36:30,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:36:30,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 11:36:30,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:36:30,542 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 11:36:30,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:36:30,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:36:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:36:31,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:36:31,468 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3941 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3941) c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 36)) 4294967296)) is different from false [2023-08-30 11:36:31,472 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3941 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3941) c_~A~0.base) (+ c_~A~0.offset 36)) 4294967296)) is different from false [2023-08-30 11:36:31,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:36:31,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 11:36:31,577 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:36:31,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 65 [2023-08-30 11:36:31,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-08-30 11:36:31,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-08-30 11:36:32,115 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:36:32,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567324477] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:36:32,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:36:32,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2023-08-30 11:36:32,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752032849] [2023-08-30 11:36:32,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:36:32,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-08-30 11:36:32,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:36:32,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-08-30 11:36:32,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=4496, Unknown=15, NotChecked=270, Total=4970 [2023-08-30 11:36:32,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:36:32,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 337 transitions, 4888 flow. Second operand has 71 states, 71 states have (on average 78.05633802816901) internal successors, (5542), 71 states have internal predecessors, (5542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:36:32,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:36:32,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:36:32,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:36:40,941 INFO L130 PetriNetUnfolder]: 12966/23480 cut-off events. [2023-08-30 11:36:40,941 INFO L131 PetriNetUnfolder]: For 178887/180585 co-relation queries the response was YES. [2023-08-30 11:36:41,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209966 conditions, 23480 events. 12966/23480 cut-off events. For 178887/180585 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 192986 event pairs, 7291 based on Foata normal form. 1788/25239 useless extension candidates. Maximal degree in co-relation 209882. Up to 6656 conditions per place. [2023-08-30 11:36:41,373 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 566 selfloop transitions, 79 changer transitions 8/655 dead transitions. [2023-08-30 11:36:41,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 655 transitions, 9841 flow [2023-08-30 11:36:41,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 11:36:41,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 11:36:41,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2184 transitions. [2023-08-30 11:36:41,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.340080971659919 [2023-08-30 11:36:41,375 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2184 transitions. [2023-08-30 11:36:41,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2184 transitions. [2023-08-30 11:36:41,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:36:41,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2184 transitions. [2023-08-30 11:36:41,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 84.0) internal successors, (2184), 26 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:36:41,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 247.0) internal successors, (6669), 27 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:36:41,380 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 247.0) internal successors, (6669), 27 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:36:41,380 INFO L175 Difference]: Start difference. First operand has 457 places, 337 transitions, 4888 flow. Second operand 26 states and 2184 transitions. [2023-08-30 11:36:41,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 655 transitions, 9841 flow [2023-08-30 11:36:42,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 655 transitions, 9568 flow, removed 1 selfloop flow, removed 24 redundant places. [2023-08-30 11:36:42,344 INFO L231 Difference]: Finished difference. Result has 460 places, 339 transitions, 4880 flow [2023-08-30 11:36:42,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=4615, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4880, PETRI_PLACES=460, PETRI_TRANSITIONS=339} [2023-08-30 11:36:42,345 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 423 predicate places. [2023-08-30 11:36:42,345 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 339 transitions, 4880 flow [2023-08-30 11:36:42,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 78.05633802816901) internal successors, (5542), 71 states have internal predecessors, (5542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:36:42,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:36:42,346 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1] [2023-08-30 11:36:42,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2023-08-30 11:36:42,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2023-08-30 11:36:42,546 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:36:42,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:36:42,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1027676296, now seen corresponding path program 9 times [2023-08-30 11:36:42,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:36:42,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726041039] [2023-08-30 11:36:42,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:36:42,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:36:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:36:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:36:43,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:36:43,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726041039] [2023-08-30 11:36:43,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726041039] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:36:43,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655355742] [2023-08-30 11:36:43,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:36:43,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:36:43,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:36:43,457 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:36:43,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2023-08-30 11:36:44,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 11:36:44,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:36:44,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-30 11:36:44,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:36:44,457 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 11:36:44,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:36:44,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:36:44,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:36:44,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:36:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:36:45,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:36:46,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:36:46,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-08-30 11:36:46,066 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:36:46,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 159 [2023-08-30 11:36:46,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2023-08-30 11:36:46,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2023-08-30 11:36:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:36:47,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655355742] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:36:47,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:36:47,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2023-08-30 11:36:47,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966094924] [2023-08-30 11:36:47,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:36:47,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-08-30 11:36:47,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:36:47,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-08-30 11:36:47,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=4510, Unknown=2, NotChecked=0, Total=4970 [2023-08-30 11:36:52,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 247 [2023-08-30 11:36:52,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 339 transitions, 4880 flow. Second operand has 71 states, 71 states have (on average 69.05633802816901) internal successors, (4903), 71 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:36:52,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:36:52,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 247 [2023-08-30 11:36:52,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:36:53,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 11:37:46,722 INFO L130 PetriNetUnfolder]: 19187/35049 cut-off events. [2023-08-30 11:37:46,722 INFO L131 PetriNetUnfolder]: For 277128/279938 co-relation queries the response was YES. [2023-08-30 11:37:47,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296728 conditions, 35049 events. 19187/35049 cut-off events. For 277128/279938 co-relation queries the response was YES. Maximal size of possible extension queue 1062. Compared 312267 event pairs, 4876 based on Foata normal form. 4245/39292 useless extension candidates. Maximal degree in co-relation 296642. Up to 7375 conditions per place. [2023-08-30 11:37:47,508 INFO L137 encePairwiseOnDemand]: 237/247 looper letters, 1726 selfloop transitions, 222 changer transitions 384/2334 dead transitions. [2023-08-30 11:37:47,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 2334 transitions, 31785 flow [2023-08-30 11:37:47,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-08-30 11:37:47,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2023-08-30 11:37:47,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 7589 transitions. [2023-08-30 11:37:47,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31035046824520507 [2023-08-30 11:37:47,513 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 7589 transitions. [2023-08-30 11:37:47,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 7589 transitions. [2023-08-30 11:37:47,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:37:47,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 7589 transitions. [2023-08-30 11:37:47,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 76.65656565656566) internal successors, (7589), 99 states have internal predecessors, (7589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:47,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 247.0) internal successors, (24700), 100 states have internal predecessors, (24700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:47,531 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 247.0) internal successors, (24700), 100 states have internal predecessors, (24700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:47,531 INFO L175 Difference]: Start difference. First operand has 460 places, 339 transitions, 4880 flow. Second operand 99 states and 7589 transitions. [2023-08-30 11:37:47,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 2334 transitions, 31785 flow [2023-08-30 11:37:49,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 2334 transitions, 31414 flow, removed 56 selfloop flow, removed 31 redundant places. [2023-08-30 11:37:49,637 INFO L231 Difference]: Finished difference. Result has 549 places, 381 transitions, 5826 flow [2023-08-30 11:37:49,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=4244, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=5826, PETRI_PLACES=549, PETRI_TRANSITIONS=381} [2023-08-30 11:37:49,638 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 512 predicate places. [2023-08-30 11:37:49,638 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 381 transitions, 5826 flow [2023-08-30 11:37:49,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 69.05633802816901) internal successors, (4903), 71 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:49,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:37:49,639 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:37:49,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2023-08-30 11:37:49,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2023-08-30 11:37:49,840 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:37:49,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:37:49,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1360110743, now seen corresponding path program 14 times [2023-08-30 11:37:49,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:37:49,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914679861] [2023-08-30 11:37:49,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:49,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:37:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:50,150 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:50,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:37:50,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914679861] [2023-08-30 11:37:50,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914679861] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:37:50,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877160043] [2023-08-30 11:37:50,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:37:50,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:37:50,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:37:50,151 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:37:50,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2023-08-30 11:37:50,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:37:50,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:37:50,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 11:37:50,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:37:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:51,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:37:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:51,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877160043] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:37:51,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:37:51,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 52 [2023-08-30 11:37:51,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8690483] [2023-08-30 11:37:51,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:37:51,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-08-30 11:37:51,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:37:51,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-08-30 11:37:51,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=2170, Unknown=0, NotChecked=0, Total=2862 [2023-08-30 11:37:51,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 11:37:51,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 381 transitions, 5826 flow. Second operand has 54 states, 54 states have (on average 95.11111111111111) internal successors, (5136), 54 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:51,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:37:51,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 11:37:51,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:37:59,935 INFO L130 PetriNetUnfolder]: 19370/35496 cut-off events. [2023-08-30 11:37:59,935 INFO L131 PetriNetUnfolder]: For 453775/454046 co-relation queries the response was YES. [2023-08-30 11:38:00,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308524 conditions, 35496 events. 19370/35496 cut-off events. For 453775/454046 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 313529 event pairs, 7997 based on Foata normal form. 631/36123 useless extension candidates. Maximal degree in co-relation 308430. Up to 17389 conditions per place. [2023-08-30 11:38:00,784 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 310 selfloop transitions, 19 changer transitions 905/1240 dead transitions. [2023-08-30 11:38:00,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 1240 transitions, 22290 flow [2023-08-30 11:38:00,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 11:38:00,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 11:38:00,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3267 transitions. [2023-08-30 11:38:00,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4008097165991903 [2023-08-30 11:38:00,786 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3267 transitions. [2023-08-30 11:38:00,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3267 transitions. [2023-08-30 11:38:00,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:38:00,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3267 transitions. [2023-08-30 11:38:00,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 99.0) internal successors, (3267), 33 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:00,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 247.0) internal successors, (8398), 34 states have internal predecessors, (8398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:00,793 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 247.0) internal successors, (8398), 34 states have internal predecessors, (8398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:00,793 INFO L175 Difference]: Start difference. First operand has 549 places, 381 transitions, 5826 flow. Second operand 33 states and 3267 transitions. [2023-08-30 11:38:00,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 1240 transitions, 22290 flow [2023-08-30 11:38:02,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 1240 transitions, 19383 flow, removed 93 selfloop flow, removed 43 redundant places. [2023-08-30 11:38:02,870 INFO L231 Difference]: Finished difference. Result has 539 places, 290 transitions, 4102 flow [2023-08-30 11:38:02,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=5129, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4102, PETRI_PLACES=539, PETRI_TRANSITIONS=290} [2023-08-30 11:38:02,871 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 502 predicate places. [2023-08-30 11:38:02,871 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 290 transitions, 4102 flow [2023-08-30 11:38:02,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 95.11111111111111) internal successors, (5136), 54 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:02,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:38:02,871 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2023-08-30 11:38:02,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2023-08-30 11:38:03,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2023-08-30 11:38:03,072 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:38:03,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:38:03,072 INFO L85 PathProgramCache]: Analyzing trace with hash 592198286, now seen corresponding path program 12 times [2023-08-30 11:38:03,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:38:03,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075146147] [2023-08-30 11:38:03,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:38:03,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:38:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:38:03,451 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:38:03,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:38:03,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075146147] [2023-08-30 11:38:03,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075146147] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:38:03,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694816433] [2023-08-30 11:38:03,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:38:03,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:38:03,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:38:03,453 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:38:03,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2023-08-30 11:38:04,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-08-30 11:38:04,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:38:04,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 11:38:04,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:38:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:38:04,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:38:05,163 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:38:05,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694816433] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:38:05,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:38:05,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 57 [2023-08-30 11:38:05,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134957759] [2023-08-30 11:38:05,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:38:05,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-08-30 11:38:05,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:38:05,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-08-30 11:38:05,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=2601, Unknown=0, NotChecked=0, Total=3422 [2023-08-30 11:38:05,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 11:38:05,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 290 transitions, 4102 flow. Second operand has 59 states, 59 states have (on average 95.08474576271186) internal successors, (5610), 59 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:05,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:38:05,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 11:38:05,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:38:11,513 INFO L130 PetriNetUnfolder]: 13055/24478 cut-off events. [2023-08-30 11:38:11,514 INFO L131 PetriNetUnfolder]: For 289626/291607 co-relation queries the response was YES. [2023-08-30 11:38:11,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216049 conditions, 24478 events. 13055/24478 cut-off events. For 289626/291607 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 212979 event pairs, 5994 based on Foata normal form. 2207/26685 useless extension candidates. Maximal degree in co-relation 215955. Up to 10854 conditions per place. [2023-08-30 11:38:11,945 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 513 selfloop transitions, 118 changer transitions 184/816 dead transitions. [2023-08-30 11:38:11,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 816 transitions, 11798 flow [2023-08-30 11:38:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 11:38:11,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 11:38:11,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3625 transitions. [2023-08-30 11:38:11,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076698155645524 [2023-08-30 11:38:11,948 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3625 transitions. [2023-08-30 11:38:11,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3625 transitions. [2023-08-30 11:38:11,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:38:11,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3625 transitions. [2023-08-30 11:38:11,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 100.69444444444444) internal successors, (3625), 36 states have internal predecessors, (3625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:11,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 247.0) internal successors, (9139), 37 states have internal predecessors, (9139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:11,954 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 247.0) internal successors, (9139), 37 states have internal predecessors, (9139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:11,954 INFO L175 Difference]: Start difference. First operand has 539 places, 290 transitions, 4102 flow. Second operand 36 states and 3625 transitions. [2023-08-30 11:38:11,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 816 transitions, 11798 flow [2023-08-30 11:38:15,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 816 transitions, 11017 flow, removed 81 selfloop flow, removed 23 redundant places. [2023-08-30 11:38:15,137 INFO L231 Difference]: Finished difference. Result has 463 places, 285 transitions, 4120 flow [2023-08-30 11:38:15,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=3847, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=4120, PETRI_PLACES=463, PETRI_TRANSITIONS=285} [2023-08-30 11:38:15,137 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 426 predicate places. [2023-08-30 11:38:15,137 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 285 transitions, 4120 flow [2023-08-30 11:38:15,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 95.08474576271186) internal successors, (5610), 59 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:15,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:38:15,138 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:38:15,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2023-08-30 11:38:15,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:38:15,339 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:38:15,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:38:15,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1292260989, now seen corresponding path program 12 times [2023-08-30 11:38:15,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:38:15,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816337054] [2023-08-30 11:38:15,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:38:15,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:38:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:38:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:38:16,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:38:16,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816337054] [2023-08-30 11:38:16,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816337054] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:38:16,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375209246] [2023-08-30 11:38:16,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:38:16,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:38:16,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:38:16,369 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:38:16,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2023-08-30 11:38:17,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-08-30 11:38:17,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:38:17,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-30 11:38:17,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:38:17,980 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 11:38:18,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:38:18,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:38:18,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:38:18,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:38:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:38:18,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:38:19,500 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:38:19,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-08-30 11:38:19,508 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:38:19,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 159 [2023-08-30 11:38:19,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2023-08-30 11:38:19,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2023-08-30 11:38:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:38:20,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375209246] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:38:20,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:38:20,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2023-08-30 11:38:20,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795539158] [2023-08-30 11:38:20,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:38:20,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-08-30 11:38:20,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:38:20,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-08-30 11:38:20,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=4500, Unknown=3, NotChecked=0, Total=4970 [2023-08-30 11:38:25,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 247 [2023-08-30 11:38:25,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 285 transitions, 4120 flow. Second operand has 71 states, 71 states have (on average 69.09859154929578) internal successors, (4906), 71 states have internal predecessors, (4906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:25,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:38:25,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 247 [2023-08-30 11:38:25,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:38:26,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 11:38:47,807 INFO L130 PetriNetUnfolder]: 15279/28358 cut-off events. [2023-08-30 11:38:47,807 INFO L131 PetriNetUnfolder]: For 407352/407352 co-relation queries the response was YES. [2023-08-30 11:38:48,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257479 conditions, 28358 events. 15279/28358 cut-off events. For 407352/407352 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 246348 event pairs, 616 based on Foata normal form. 796/29154 useless extension candidates. Maximal degree in co-relation 257388. Up to 6309 conditions per place. [2023-08-30 11:38:48,183 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 1817 selfloop transitions, 85 changer transitions 645/2553 dead transitions. [2023-08-30 11:38:48,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 2553 transitions, 48299 flow [2023-08-30 11:38:48,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-08-30 11:38:48,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-08-30 11:38:48,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 5911 transitions. [2023-08-30 11:38:48,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3029262542920105 [2023-08-30 11:38:48,187 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 5911 transitions. [2023-08-30 11:38:48,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 5911 transitions. [2023-08-30 11:38:48,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:38:48,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 5911 transitions. [2023-08-30 11:38:48,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 74.82278481012658) internal successors, (5911), 79 states have internal predecessors, (5911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:48,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 247.0) internal successors, (19760), 80 states have internal predecessors, (19760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:48,200 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 247.0) internal successors, (19760), 80 states have internal predecessors, (19760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:48,200 INFO L175 Difference]: Start difference. First operand has 463 places, 285 transitions, 4120 flow. Second operand 79 states and 5911 transitions. [2023-08-30 11:38:48,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 2553 transitions, 48299 flow [2023-08-30 11:38:49,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 2553 transitions, 47002 flow, removed 64 selfloop flow, removed 22 redundant places. [2023-08-30 11:38:49,505 INFO L231 Difference]: Finished difference. Result has 525 places, 339 transitions, 4917 flow [2023-08-30 11:38:49,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=4001, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=4917, PETRI_PLACES=525, PETRI_TRANSITIONS=339} [2023-08-30 11:38:49,506 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 488 predicate places. [2023-08-30 11:38:49,506 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 339 transitions, 4917 flow [2023-08-30 11:38:49,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 69.09859154929578) internal successors, (4906), 71 states have internal predecessors, (4906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:49,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:38:49,507 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:38:49,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2023-08-30 11:38:49,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:38:49,709 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:38:49,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:38:49,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1405382567, now seen corresponding path program 15 times [2023-08-30 11:38:49,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:38:49,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457810659] [2023-08-30 11:38:49,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:38:49,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:38:49,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:38:50,056 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:38:50,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:38:50,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457810659] [2023-08-30 11:38:50,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457810659] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:38:50,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112582795] [2023-08-30 11:38:50,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:38:50,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:38:50,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:38:50,058 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:38:50,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2023-08-30 11:38:50,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 11:38:50,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:38:50,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 11:38:50,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:38:51,138 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:38:51,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:38:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:38:51,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112582795] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:38:51,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:38:51,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 57 [2023-08-30 11:38:51,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710311099] [2023-08-30 11:38:51,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:38:51,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-08-30 11:38:51,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:38:51,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-08-30 11:38:51,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=2601, Unknown=0, NotChecked=0, Total=3422 [2023-08-30 11:38:52,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 11:38:52,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 339 transitions, 4917 flow. Second operand has 59 states, 59 states have (on average 95.10169491525424) internal successors, (5611), 59 states have internal predecessors, (5611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:52,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:38:52,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 11:38:52,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:38:58,781 INFO L130 PetriNetUnfolder]: 15011/28090 cut-off events. [2023-08-30 11:38:58,781 INFO L131 PetriNetUnfolder]: For 436453/436453 co-relation queries the response was YES. [2023-08-30 11:38:59,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270838 conditions, 28090 events. 15011/28090 cut-off events. For 436453/436453 co-relation queries the response was YES. Maximal size of possible extension queue 794. Compared 243004 event pairs, 5782 based on Foata normal form. 268/28358 useless extension candidates. Maximal degree in co-relation 270740. Up to 12431 conditions per place. [2023-08-30 11:38:59,392 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 764 selfloop transitions, 57 changer transitions 497/1324 dead transitions. [2023-08-30 11:38:59,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 1324 transitions, 23711 flow [2023-08-30 11:38:59,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 11:38:59,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 11:38:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3562 transitions. [2023-08-30 11:38:59,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40058479532163743 [2023-08-30 11:38:59,394 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3562 transitions. [2023-08-30 11:38:59,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3562 transitions. [2023-08-30 11:38:59,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:38:59,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3562 transitions. [2023-08-30 11:38:59,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 98.94444444444444) internal successors, (3562), 36 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:59,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 247.0) internal successors, (9139), 37 states have internal predecessors, (9139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:59,401 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 247.0) internal successors, (9139), 37 states have internal predecessors, (9139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:59,401 INFO L175 Difference]: Start difference. First operand has 525 places, 339 transitions, 4917 flow. Second operand 36 states and 3562 transitions. [2023-08-30 11:38:59,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 1324 transitions, 23711 flow [2023-08-30 11:39:01,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 1324 transitions, 23484 flow, removed 34 selfloop flow, removed 25 redundant places. [2023-08-30 11:39:01,341 INFO L231 Difference]: Finished difference. Result has 536 places, 338 transitions, 4785 flow [2023-08-30 11:39:01,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=4668, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=4785, PETRI_PLACES=536, PETRI_TRANSITIONS=338} [2023-08-30 11:39:01,342 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 499 predicate places. [2023-08-30 11:39:01,342 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 338 transitions, 4785 flow [2023-08-30 11:39:01,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 95.10169491525424) internal successors, (5611), 59 states have internal predecessors, (5611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:01,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:39:01,342 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:39:01,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2023-08-30 11:39:01,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:39:01,543 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:39:01,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:39:01,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1292260990, now seen corresponding path program 16 times [2023-08-30 11:39:01,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:39:01,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522749617] [2023-08-30 11:39:01,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:39:01,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:39:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:39:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:39:02,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:39:02,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522749617] [2023-08-30 11:39:02,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522749617] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:39:02,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518841571] [2023-08-30 11:39:02,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:39:02,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:39:02,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:39:02,286 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:39:02,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2023-08-30 11:39:02,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:39:02,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:39:02,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-30 11:39:02,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:39:03,171 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 11:39:03,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:39:03,219 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 11:39:03,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:39:03,261 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 11:39:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:39:03,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:39:04,038 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4345 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4345) c_~A~0.base) (+ c_~A~0.offset 36)) 9223372039002259456)) is different from false [2023-08-30 11:39:04,113 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:39:04,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 11:39:04,119 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:39:04,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 129 [2023-08-30 11:39:04,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-30 11:39:04,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 11:39:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:39:04,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518841571] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:39:04,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:39:04,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 67 [2023-08-30 11:39:04,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568791675] [2023-08-30 11:39:04,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:39:04,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-08-30 11:39:04,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:39:04,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-08-30 11:39:04,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4328, Unknown=10, NotChecked=132, Total=4692 [2023-08-30 11:39:04,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:39:04,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 338 transitions, 4785 flow. Second operand has 69 states, 69 states have (on average 78.10144927536231) internal successors, (5389), 69 states have internal predecessors, (5389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:04,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:39:04,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:39:04,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:39:12,956 INFO L130 PetriNetUnfolder]: 14093/26684 cut-off events. [2023-08-30 11:39:12,956 INFO L131 PetriNetUnfolder]: For 374994/374994 co-relation queries the response was YES. [2023-08-30 11:39:13,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238218 conditions, 26684 events. 14093/26684 cut-off events. For 374994/374994 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 234462 event pairs, 1661 based on Foata normal form. 842/27526 useless extension candidates. Maximal degree in co-relation 238119. Up to 5823 conditions per place. [2023-08-30 11:39:13,490 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 818 selfloop transitions, 40 changer transitions 522/1384 dead transitions. [2023-08-30 11:39:13,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 1384 transitions, 26095 flow [2023-08-30 11:39:13,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 11:39:13,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 11:39:13,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2150 transitions. [2023-08-30 11:39:13,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3347866708190595 [2023-08-30 11:39:13,492 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2150 transitions. [2023-08-30 11:39:13,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2150 transitions. [2023-08-30 11:39:13,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:39:13,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2150 transitions. [2023-08-30 11:39:13,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 82.6923076923077) internal successors, (2150), 26 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:13,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 247.0) internal successors, (6669), 27 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:13,496 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 247.0) internal successors, (6669), 27 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:13,496 INFO L175 Difference]: Start difference. First operand has 536 places, 338 transitions, 4785 flow. Second operand 26 states and 2150 transitions. [2023-08-30 11:39:13,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 1384 transitions, 26095 flow [2023-08-30 11:39:16,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 1384 transitions, 26017 flow, removed 11 selfloop flow, removed 22 redundant places. [2023-08-30 11:39:16,456 INFO L231 Difference]: Finished difference. Result has 539 places, 225 transitions, 3174 flow [2023-08-30 11:39:16,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=4683, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3174, PETRI_PLACES=539, PETRI_TRANSITIONS=225} [2023-08-30 11:39:16,456 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 502 predicate places. [2023-08-30 11:39:16,456 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 225 transitions, 3174 flow [2023-08-30 11:39:16,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 78.10144927536231) internal successors, (5389), 69 states have internal predecessors, (5389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:16,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:39:16,457 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1] [2023-08-30 11:39:16,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2023-08-30 11:39:16,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:39:16,658 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:39:16,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:39:16,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1174051349, now seen corresponding path program 13 times [2023-08-30 11:39:16,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:39:16,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986033489] [2023-08-30 11:39:16,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:39:16,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:39:16,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:39:17,605 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:39:17,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:39:17,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986033489] [2023-08-30 11:39:17,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986033489] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:39:17,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692453520] [2023-08-30 11:39:17,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:39:17,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:39:17,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:39:17,606 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:39:17,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2023-08-30 11:39:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:39:18,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 67 conjunts are in the unsatisfiable core [2023-08-30 11:39:18,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:39:18,540 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 11:39:18,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:39:18,587 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 11:39:18,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:39:18,672 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 11:39:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:39:19,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:39:19,578 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4418 (Array Int Int)) (v_ArrVal_4419 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_4418) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4419) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 40 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-30 11:39:19,584 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:39:19,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 11:39:19,590 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:39:19,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 129 [2023-08-30 11:39:19,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-30 11:39:19,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 11:39:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 11 not checked. [2023-08-30 11:39:20,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692453520] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:39:20,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:39:20,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 74 [2023-08-30 11:39:20,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147174274] [2023-08-30 11:39:20,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:39:20,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-08-30 11:39:20,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:39:20,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-08-30 11:39:20,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=5298, Unknown=27, NotChecked=146, Total=5700 [2023-08-30 11:39:20,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 11:39:20,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 225 transitions, 3174 flow. Second operand has 76 states, 76 states have (on average 78.0657894736842) internal successors, (5933), 76 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 11:39:20,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:39:20,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 11:39:20,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:39:27,216 INFO L130 PetriNetUnfolder]: 9753/18726 cut-off events. [2023-08-30 11:39:27,216 INFO L131 PetriNetUnfolder]: For 196651/197947 co-relation queries the response was YES. [2023-08-30 11:39:27,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174741 conditions, 18726 events. 9753/18726 cut-off events. For 196651/197947 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 159663 event pairs, 4841 based on Foata normal form. 1397/20089 useless extension candidates. Maximal degree in co-relation 174641. Up to 5753 conditions per place. [2023-08-30 11:39:27,670 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 816 selfloop transitions, 67 changer transitions 0/885 dead transitions. [2023-08-30 11:39:27,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 885 transitions, 14740 flow [2023-08-30 11:39:27,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 11:39:27,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 11:39:27,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2337 transitions. [2023-08-30 11:39:27,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33791208791208793 [2023-08-30 11:39:27,673 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2337 transitions. [2023-08-30 11:39:27,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2337 transitions. [2023-08-30 11:39:27,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:39:27,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2337 transitions. [2023-08-30 11:39:27,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 83.46428571428571) internal successors, (2337), 28 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:27,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 247.0) internal successors, (7163), 29 states have internal predecessors, (7163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:27,679 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 247.0) internal successors, (7163), 29 states have internal predecessors, (7163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:27,680 INFO L175 Difference]: Start difference. First operand has 539 places, 225 transitions, 3174 flow. Second operand 28 states and 2337 transitions. [2023-08-30 11:39:27,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 885 transitions, 14740 flow [2023-08-30 11:39:29,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 885 transitions, 13132 flow, removed 337 selfloop flow, removed 50 redundant places. [2023-08-30 11:39:29,192 INFO L231 Difference]: Finished difference. Result has 424 places, 227 transitions, 3170 flow [2023-08-30 11:39:29,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2947, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3170, PETRI_PLACES=424, PETRI_TRANSITIONS=227} [2023-08-30 11:39:29,192 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 387 predicate places. [2023-08-30 11:39:29,193 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 227 transitions, 3170 flow [2023-08-30 11:39:29,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 78.0657894736842) internal successors, (5933), 76 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 11:39:29,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:39:29,193 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 10, 1, 1, 1, 1, 1] [2023-08-30 11:39:29,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2023-08-30 11:39:29,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:39:29,394 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:39:29,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:39:29,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1236533583, now seen corresponding path program 12 times [2023-08-30 11:39:29,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:39:29,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273359426] [2023-08-30 11:39:29,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:39:29,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:39:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:39:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:39:30,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:39:30,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273359426] [2023-08-30 11:39:30,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273359426] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:39:30,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152592508] [2023-08-30 11:39:30,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:39:30,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:39:30,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:39:30,506 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:39:30,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2023-08-30 11:39:31,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-08-30 11:39:31,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:39:31,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 66 conjunts are in the unsatisfiable core [2023-08-30 11:39:31,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:39:31,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 11:39:31,640 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-30 11:39:31,640 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 27 treesize of output 26 [2023-08-30 11:39:31,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:39:31,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:39:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:39:32,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:39:32,911 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 11:39:32,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 39 [2023-08-30 11:39:32,917 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:39:32,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2023-08-30 11:39:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:39:33,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152592508] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:39:33,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:39:33,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2023-08-30 11:39:33,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865817570] [2023-08-30 11:39:33,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:39:33,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-08-30 11:39:33,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:39:33,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-08-30 11:39:33,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=5592, Unknown=27, NotChecked=0, Total=5852 [2023-08-30 11:39:36,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 247 [2023-08-30 11:39:36,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 227 transitions, 3170 flow. Second operand has 77 states, 77 states have (on average 84.05194805194805) internal successors, (6472), 77 states have internal predecessors, (6472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:36,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:39:36,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 247 [2023-08-30 11:39:36,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand