./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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-horseshoe.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 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 15:27:48,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 15:27:48,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 15:27:48,136 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 15:27:48,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 15:27:48,141 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 15:27:48,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 15:27:48,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 15:27:48,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 15:27:48,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 15:27:48,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 15:27:48,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 15:27:48,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 15:27:48,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 15:27:48,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 15:27:48,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 15:27:48,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 15:27:48,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 15:27:48,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 15:27:48,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 15:27:48,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 15:27:48,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 15:27:48,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 15:27:48,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 15:27:48,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 15:27:48,185 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 15:27:48,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 15:27:48,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 15:27:48,187 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 15:27:48,188 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 15:27:48,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 15:27:48,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 15:27:48,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 15:27:48,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 15:27:48,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 15:27:48,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 15:27:48,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 15:27:48,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 15:27:48,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 15:27:48,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 15:27:48,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 15:27:48,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 15:27:48,231 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 15:27:48,231 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 15:27:48,232 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 15:27:48,233 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 15:27:48,233 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 15:27:48,234 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 15:27:48,234 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 15:27:48,234 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 15:27:48,235 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 15:27:48,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 15:27:48,235 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 15:27:48,236 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 15:27:48,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 15:27:48,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 15:27:48,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 15:27:48,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 15:27:48,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 15:27:48,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 15:27:48,237 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 15:27:48,237 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 15:27:48,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 15:27:48,238 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 15:27:48,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 15:27:48,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 15:27:48,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 15:27:48,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 15:27:48,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:27:48,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 15:27:48,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 15:27:48,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 15:27:48,239 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 15:27:48,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 15:27:48,240 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 15:27:48,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 15:27:48,240 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 15:27:48,240 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 15:27:48,241 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 15:27:48,241 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 15:27:48,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 15:27:48,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 15:27:48,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 15:27:48,527 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 15:27:48,527 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 15:27:48,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-08-30 15:27:49,614 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 15:27:49,851 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 15:27:49,852 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-08-30 15:27:49,860 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/189637b12/12ef8a888e614e82b23c2b06d8dae324/FLAG606a1a3a1 [2023-08-30 15:27:49,882 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/189637b12/12ef8a888e614e82b23c2b06d8dae324 [2023-08-30 15:27:49,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 15:27:49,886 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 15:27:49,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 15:27:49,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 15:27:49,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 15:27:49,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:27:49" (1/1) ... [2023-08-30 15:27:49,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64f57e24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:27:49, skipping insertion in model container [2023-08-30 15:27:49,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:27:49" (1/1) ... [2023-08-30 15:27:49,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 15:27:49,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 15:27:50,126 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-horseshoe.wvr.c[3424,3437] [2023-08-30 15:27:50,134 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:27:50,143 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 15:27:50,185 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-horseshoe.wvr.c[3424,3437] [2023-08-30 15:27:50,189 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:27:50,198 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:27:50,199 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:27:50,205 INFO L208 MainTranslator]: Completed translation [2023-08-30 15:27:50,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:27:50 WrapperNode [2023-08-30 15:27:50,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 15:27:50,208 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 15:27:50,208 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 15:27:50,208 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 15:27:50,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:27:50" (1/1) ... [2023-08-30 15:27:50,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:27:50" (1/1) ... [2023-08-30 15:27:50,271 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 278 [2023-08-30 15:27:50,275 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 15:27:50,276 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 15:27:50,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 15:27:50,277 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 15:27:50,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:27:50" (1/1) ... [2023-08-30 15:27:50,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:27:50" (1/1) ... [2023-08-30 15:27:50,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:27:50" (1/1) ... [2023-08-30 15:27:50,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:27:50" (1/1) ... [2023-08-30 15:27:50,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:27:50" (1/1) ... [2023-08-30 15:27:50,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:27:50" (1/1) ... [2023-08-30 15:27:50,324 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:27:50" (1/1) ... [2023-08-30 15:27:50,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:27:50" (1/1) ... [2023-08-30 15:27:50,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 15:27:50,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 15:27:50,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 15:27:50,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 15:27:50,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:27:50" (1/1) ... [2023-08-30 15:27:50,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:27:50,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:27:50,377 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 15:27:50,384 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 15:27:50,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 15:27:50,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 15:27:50,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 15:27:50,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 15:27:50,410 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 15:27:50,410 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 15:27:50,410 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 15:27:50,410 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 15:27:50,411 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 15:27:50,411 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 15:27:50,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 15:27:50,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 15:27:50,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 15:27:50,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 15:27:50,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 15:27:50,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 15:27:50,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 15:27:50,413 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 15:27:50,565 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 15:27:50,567 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 15:27:51,028 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 15:27:51,211 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 15:27:51,215 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-30 15:27:51,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:27:51 BoogieIcfgContainer [2023-08-30 15:27:51,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 15:27:51,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 15:27:51,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 15:27:51,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 15:27:51,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 03:27:49" (1/3) ... [2023-08-30 15:27:51,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f26175a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:27:51, skipping insertion in model container [2023-08-30 15:27:51,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:27:50" (2/3) ... [2023-08-30 15:27:51,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f26175a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:27:51, skipping insertion in model container [2023-08-30 15:27:51,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:27:51" (3/3) ... [2023-08-30 15:27:51,225 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2023-08-30 15:27:51,232 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 15:27:51,240 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 15:27:51,240 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-08-30 15:27:51,240 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 15:27:51,331 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 15:27:51,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 239 transitions, 502 flow [2023-08-30 15:27:51,443 INFO L130 PetriNetUnfolder]: 18/236 cut-off events. [2023-08-30 15:27:51,443 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 15:27:51,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 236 events. 18/236 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 238 event pairs, 0 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 188. Up to 3 conditions per place. [2023-08-30 15:27:51,449 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 239 transitions, 502 flow [2023-08-30 15:27:51,458 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 212 places, 219 transitions, 456 flow [2023-08-30 15:27:51,461 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 15:27:51,474 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 212 places, 219 transitions, 456 flow [2023-08-30 15:27:51,479 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 212 places, 219 transitions, 456 flow [2023-08-30 15:27:51,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 219 transitions, 456 flow [2023-08-30 15:27:51,536 INFO L130 PetriNetUnfolder]: 17/219 cut-off events. [2023-08-30 15:27:51,536 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 15:27:51,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 219 events. 17/219 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 238 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 188. Up to 3 conditions per place. [2023-08-30 15:27:51,539 INFO L119 LiptonReduction]: Number of co-enabled transitions 3440 [2023-08-30 15:27:59,443 INFO L134 LiptonReduction]: Checked pairs total: 7488 [2023-08-30 15:27:59,443 INFO L136 LiptonReduction]: Total number of compositions: 231 [2023-08-30 15:27:59,454 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 15:27:59,460 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;@7917d23a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 15:27:59,460 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-08-30 15:27:59,464 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 15:27:59,464 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 15:27:59,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:27:59,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 15:27:59,465 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:27:59,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:27:59,469 INFO L85 PathProgramCache]: Analyzing trace with hash 35227, now seen corresponding path program 1 times [2023-08-30 15:27:59,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:27:59,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791834761] [2023-08-30 15:27:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:27:59,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:27:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:27:59,770 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 15:27:59,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:27:59,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791834761] [2023-08-30 15:27:59,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791834761] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:27:59,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:27:59,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:27:59,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85033601] [2023-08-30 15:27:59,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:27:59,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:27:59,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:27:59,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:27:59,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:27:59,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 470 [2023-08-30 15:27:59,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:27:59,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:27:59,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 470 [2023-08-30 15:27:59,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:01,256 INFO L130 PetriNetUnfolder]: 7769/10041 cut-off events. [2023-08-30 15:28:01,257 INFO L131 PetriNetUnfolder]: For 274/274 co-relation queries the response was YES. [2023-08-30 15:28:01,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20476 conditions, 10041 events. 7769/10041 cut-off events. For 274/274 co-relation queries the response was YES. Maximal size of possible extension queue 982. Compared 50096 event pairs, 4235 based on Foata normal form. 0/3149 useless extension candidates. Maximal degree in co-relation 9182. Up to 4994 conditions per place. [2023-08-30 15:28:01,327 INFO L137 encePairwiseOnDemand]: 456/470 looper letters, 79 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-08-30 15:28:01,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 86 transitions, 374 flow [2023-08-30 15:28:01,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:28:01,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:28:01,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 687 transitions. [2023-08-30 15:28:01,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48723404255319147 [2023-08-30 15:28:01,348 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 687 transitions. [2023-08-30 15:28:01,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 687 transitions. [2023-08-30 15:28:01,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:01,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 687 transitions. [2023-08-30 15:28:01,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:01,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:01,368 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:01,369 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 124 flow. Second operand 3 states and 687 transitions. [2023-08-30 15:28:01,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 86 transitions, 374 flow [2023-08-30 15:28:01,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 86 transitions, 350 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 15:28:01,398 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 136 flow [2023-08-30 15:28:01,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2023-08-30 15:28:01,406 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -7 predicate places. [2023-08-30 15:28:01,408 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 136 flow [2023-08-30 15:28:01,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:01,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:01,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 15:28:01,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 15:28:01,411 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:28:01,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:01,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1094125, now seen corresponding path program 1 times [2023-08-30 15:28:01,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:01,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938608173] [2023-08-30 15:28:01,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:01,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:01,515 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 15:28:01,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:01,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938608173] [2023-08-30 15:28:01,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938608173] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:28:01,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:28:01,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:28:01,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121032825] [2023-08-30 15:28:01,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:28:01,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:28:01,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:01,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:28:01,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:28:01,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 470 [2023-08-30 15:28:01,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:01,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:01,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 470 [2023-08-30 15:28:01,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:02,542 INFO L130 PetriNetUnfolder]: 7777/10047 cut-off events. [2023-08-30 15:28:02,543 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-30 15:28:02,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20211 conditions, 10047 events. 7777/10047 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 1051. Compared 50689 event pairs, 4236 based on Foata normal form. 0/3105 useless extension candidates. Maximal degree in co-relation 10094. Up to 9991 conditions per place. [2023-08-30 15:28:02,600 INFO L137 encePairwiseOnDemand]: 467/470 looper letters, 44 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-08-30 15:28:02,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 218 flow [2023-08-30 15:28:02,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:28:02,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:28:02,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 632 transitions. [2023-08-30 15:28:02,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482269503546099 [2023-08-30 15:28:02,604 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 632 transitions. [2023-08-30 15:28:02,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 632 transitions. [2023-08-30 15:28:02,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:02,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 632 transitions. [2023-08-30 15:28:02,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:02,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:02,610 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:02,610 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 136 flow. Second operand 3 states and 632 transitions. [2023-08-30 15:28:02,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 218 flow [2023-08-30 15:28:02,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 210 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 15:28:02,613 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 122 flow [2023-08-30 15:28:02,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-08-30 15:28:02,614 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2023-08-30 15:28:02,614 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 122 flow [2023-08-30 15:28:02,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:02,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:02,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 15:28:02,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 15:28:02,615 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:28:02,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:02,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1094140, now seen corresponding path program 1 times [2023-08-30 15:28:02,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:02,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035848651] [2023-08-30 15:28:02,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:02,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:02,697 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 15:28:02,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:02,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035848651] [2023-08-30 15:28:02,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035848651] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:28:02,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637097925] [2023-08-30 15:28:02,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:02,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:02,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:28:02,702 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 15:28:02,726 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 15:28:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:02,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:28:02,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:28:02,855 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 15:28:02,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:28:02,879 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 15:28:02,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637097925] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:28:02,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:28:02,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 15:28:02,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873279324] [2023-08-30 15:28:02,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:28:02,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:28:02,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:02,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:28:02,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 15:28:02,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 470 [2023-08-30 15:28:02,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 122 flow. Second operand has 7 states, 7 states have (on average 197.14285714285714) internal successors, (1380), 7 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:02,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:02,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 470 [2023-08-30 15:28:02,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:05,388 INFO L130 PetriNetUnfolder]: 19409/25081 cut-off events. [2023-08-30 15:28:05,388 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 15:28:05,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50431 conditions, 25081 events. 19409/25081 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 1687. Compared 137497 event pairs, 10586 based on Foata normal form. 0/7948 useless extension candidates. Maximal degree in co-relation 50423. Up to 4997 conditions per place. [2023-08-30 15:28:05,539 INFO L137 encePairwiseOnDemand]: 464/470 looper letters, 185 selfloop transitions, 13 changer transitions 0/201 dead transitions. [2023-08-30 15:28:05,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 201 transitions, 866 flow [2023-08-30 15:28:05,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 15:28:05,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 15:28:05,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1380 transitions. [2023-08-30 15:28:05,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2023-08-30 15:28:05,543 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1380 transitions. [2023-08-30 15:28:05,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1380 transitions. [2023-08-30 15:28:05,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:05,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1380 transitions. [2023-08-30 15:28:05,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:05,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:05,553 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:05,553 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 122 flow. Second operand 6 states and 1380 transitions. [2023-08-30 15:28:05,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 201 transitions, 866 flow [2023-08-30 15:28:05,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 201 transitions, 865 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:28:05,557 INFO L231 Difference]: Finished difference. Result has 55 places, 57 transitions, 214 flow [2023-08-30 15:28:05,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=55, PETRI_TRANSITIONS=57} [2023-08-30 15:28:05,558 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-08-30 15:28:05,558 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 57 transitions, 214 flow [2023-08-30 15:28:05,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 197.14285714285714) internal successors, (1380), 7 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:05,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:05,559 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 15:28:05,572 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 15:28:05,766 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 15:28:05,766 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:28:05,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:05,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1762587094, now seen corresponding path program 2 times [2023-08-30 15:28:05,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:05,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419963834] [2023-08-30 15:28:05,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:05,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:05,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:05,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419963834] [2023-08-30 15:28:05,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419963834] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:28:05,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481416828] [2023-08-30 15:28:05,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:28:05,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:05,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:28:05,897 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 15:28:05,911 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 15:28:05,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:28:05,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:28:05,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 15:28:05,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:28:05,998 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 15:28:05,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:28:05,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481416828] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:28:05,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:28:05,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 15:28:05,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536689780] [2023-08-30 15:28:05,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:28:06,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:28:06,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:06,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:28:06,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 15:28:06,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 470 [2023-08-30 15:28:06,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 57 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:06,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:06,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 470 [2023-08-30 15:28:06,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:07,785 INFO L130 PetriNetUnfolder]: 19441/25111 cut-off events. [2023-08-30 15:28:07,785 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-08-30 15:28:07,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50520 conditions, 25111 events. 19441/25111 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 2003. Compared 139441 event pairs, 10590 based on Foata normal form. 2/7761 useless extension candidates. Maximal degree in co-relation 50508. Up to 24971 conditions per place. [2023-08-30 15:28:07,945 INFO L137 encePairwiseOnDemand]: 467/470 looper letters, 51 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-30 15:28:07,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 298 flow [2023-08-30 15:28:07,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:28:07,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:28:07,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 636 transitions. [2023-08-30 15:28:07,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.451063829787234 [2023-08-30 15:28:07,948 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 636 transitions. [2023-08-30 15:28:07,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 636 transitions. [2023-08-30 15:28:07,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:07,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 636 transitions. [2023-08-30 15:28:07,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:07,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:07,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:07,953 INFO L175 Difference]: Start difference. First operand has 55 places, 57 transitions, 214 flow. Second operand 3 states and 636 transitions. [2023-08-30 15:28:07,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 55 transitions, 298 flow [2023-08-30 15:28:07,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 253 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-08-30 15:28:07,955 INFO L231 Difference]: Finished difference. Result has 50 places, 55 transitions, 151 flow [2023-08-30 15:28:07,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=50, PETRI_TRANSITIONS=55} [2023-08-30 15:28:07,957 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -7 predicate places. [2023-08-30 15:28:07,957 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 55 transitions, 151 flow [2023-08-30 15:28:07,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:07,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:07,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 15:28:07,967 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 15:28:08,164 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,SelfDestructingSolverStorable3 [2023-08-30 15:28:08,164 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:28:08,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:08,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1760136119, now seen corresponding path program 1 times [2023-08-30 15:28:08,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:08,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317459420] [2023-08-30 15:28:08,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:08,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:08,257 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 15:28:08,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:08,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317459420] [2023-08-30 15:28:08,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317459420] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:28:08,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:28:08,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:28:08,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984342136] [2023-08-30 15:28:08,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:28:08,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:28:08,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:08,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:28:08,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 15:28:08,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 470 [2023-08-30 15:28:08,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 55 transitions, 151 flow. Second operand has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:08,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:08,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 470 [2023-08-30 15:28:08,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:10,156 INFO L130 PetriNetUnfolder]: 19451/25221 cut-off events. [2023-08-30 15:28:10,156 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 15:28:10,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50714 conditions, 25221 events. 19451/25221 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 2043. Compared 140790 event pairs, 10605 based on Foata normal form. 139/8225 useless extension candidates. Maximal degree in co-relation 50705. Up to 24925 conditions per place. [2023-08-30 15:28:10,298 INFO L137 encePairwiseOnDemand]: 458/470 looper letters, 75 selfloop transitions, 4 changer transitions 2/84 dead transitions. [2023-08-30 15:28:10,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 84 transitions, 387 flow [2023-08-30 15:28:10,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:28:10,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:28:10,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1044 transitions. [2023-08-30 15:28:10,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4442553191489362 [2023-08-30 15:28:10,302 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1044 transitions. [2023-08-30 15:28:10,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1044 transitions. [2023-08-30 15:28:10,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:10,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1044 transitions. [2023-08-30 15:28:10,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 208.8) internal successors, (1044), 5 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:10,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:10,311 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:10,311 INFO L175 Difference]: Start difference. First operand has 50 places, 55 transitions, 151 flow. Second operand 5 states and 1044 transitions. [2023-08-30 15:28:10,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 84 transitions, 387 flow [2023-08-30 15:28:10,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 84 transitions, 386 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:28:10,315 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 199 flow [2023-08-30 15:28:10,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2023-08-30 15:28:10,317 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-08-30 15:28:10,317 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 199 flow [2023-08-30 15:28:10,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:10,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:10,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:28:10,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 15:28:10,318 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:28:10,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:10,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1196827547, now seen corresponding path program 1 times [2023-08-30 15:28:10,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:10,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756755476] [2023-08-30 15:28:10,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:10,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:10,431 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 15:28:10,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:10,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756755476] [2023-08-30 15:28:10,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756755476] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:28:10,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450947269] [2023-08-30 15:28:10,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:10,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:10,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:28:10,434 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 15:28:10,437 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 15:28:10,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:10,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:28:10,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:28:10,530 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 15:28:10,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:28:10,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450947269] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:28:10,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:28:10,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-30 15:28:10,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141173054] [2023-08-30 15:28:10,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:28:10,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:28:10,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:10,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:28:10,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 15:28:10,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 470 [2023-08-30 15:28:10,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:10,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:10,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 470 [2023-08-30 15:28:10,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:11,633 INFO L130 PetriNetUnfolder]: 12431/16371 cut-off events. [2023-08-30 15:28:11,633 INFO L131 PetriNetUnfolder]: For 5660/5660 co-relation queries the response was YES. [2023-08-30 15:28:11,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44507 conditions, 16371 events. 12431/16371 cut-off events. For 5660/5660 co-relation queries the response was YES. Maximal size of possible extension queue 1336. Compared 89690 event pairs, 6930 based on Foata normal form. 0/6027 useless extension candidates. Maximal degree in co-relation 44495. Up to 16281 conditions per place. [2023-08-30 15:28:11,726 INFO L137 encePairwiseOnDemand]: 466/470 looper letters, 49 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-08-30 15:28:11,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 281 flow [2023-08-30 15:28:11,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:28:11,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:28:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 640 transitions. [2023-08-30 15:28:11,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45390070921985815 [2023-08-30 15:28:11,729 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 640 transitions. [2023-08-30 15:28:11,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 640 transitions. [2023-08-30 15:28:11,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:11,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 640 transitions. [2023-08-30 15:28:11,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:11,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:11,734 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:11,734 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 199 flow. Second operand 3 states and 640 transitions. [2023-08-30 15:28:11,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 281 flow [2023-08-30 15:28:11,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 275 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 15:28:11,737 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 177 flow [2023-08-30 15:28:11,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=51, 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=177, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2023-08-30 15:28:11,739 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2023-08-30 15:28:11,740 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 177 flow [2023-08-30 15:28:11,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:11,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:11,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:28:11,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 15:28:11,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:11,948 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:28:11,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:11,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1196827669, now seen corresponding path program 1 times [2023-08-30 15:28:11,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:11,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606393621] [2023-08-30 15:28:11,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:11,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:11,987 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 15:28:11,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:11,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606393621] [2023-08-30 15:28:11,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606393621] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:28:11,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:28:11,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:28:11,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258369718] [2023-08-30 15:28:11,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:28:11,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:28:11,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:11,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:28:11,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:28:11,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 470 [2023-08-30 15:28:11,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:11,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:11,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 470 [2023-08-30 15:28:11,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:13,509 INFO L130 PetriNetUnfolder]: 16321/22241 cut-off events. [2023-08-30 15:28:13,509 INFO L131 PetriNetUnfolder]: For 4936/4936 co-relation queries the response was YES. [2023-08-30 15:28:13,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54815 conditions, 22241 events. 16321/22241 cut-off events. For 4936/4936 co-relation queries the response was YES. Maximal size of possible extension queue 1781. Compared 140242 event pairs, 7110 based on Foata normal form. 0/9362 useless extension candidates. Maximal degree in co-relation 54802. Up to 14747 conditions per place. [2023-08-30 15:28:13,595 INFO L137 encePairwiseOnDemand]: 466/470 looper letters, 78 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-30 15:28:13,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 82 transitions, 412 flow [2023-08-30 15:28:13,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:28:13,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:28:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 669 transitions. [2023-08-30 15:28:13,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474468085106383 [2023-08-30 15:28:13,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 669 transitions. [2023-08-30 15:28:13,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 669 transitions. [2023-08-30 15:28:13,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:13,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 669 transitions. [2023-08-30 15:28:13,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:13,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:13,601 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:13,601 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 177 flow. Second operand 3 states and 669 transitions. [2023-08-30 15:28:13,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 82 transitions, 412 flow [2023-08-30 15:28:13,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 82 transitions, 411 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:28:13,605 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 194 flow [2023-08-30 15:28:13,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2023-08-30 15:28:13,605 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-08-30 15:28:13,605 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 194 flow [2023-08-30 15:28:13,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:13,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:13,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:28:13,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 15:28:13,606 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:28:13,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:13,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1553045275, now seen corresponding path program 1 times [2023-08-30 15:28:13,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:13,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183568360] [2023-08-30 15:28:13,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:13,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:28:13,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:13,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183568360] [2023-08-30 15:28:13,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183568360] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:28:13,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636952403] [2023-08-30 15:28:13,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:13,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:13,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:28:13,660 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 15:28:13,662 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 15:28:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:13,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:28:13,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:28:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:28:13,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:28:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:28:13,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636952403] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:28:13,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:28:13,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 15:28:13,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419064444] [2023-08-30 15:28:13,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:28:13,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:28:13,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:13,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:28:13,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 15:28:13,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 470 [2023-08-30 15:28:13,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 194 flow. Second operand has 7 states, 7 states have (on average 201.85714285714286) internal successors, (1413), 7 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:13,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:13,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 470 [2023-08-30 15:28:13,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:16,646 INFO L130 PetriNetUnfolder]: 34261/45896 cut-off events. [2023-08-30 15:28:16,647 INFO L131 PetriNetUnfolder]: For 15251/15251 co-relation queries the response was YES. [2023-08-30 15:28:16,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124041 conditions, 45896 events. 34261/45896 cut-off events. For 15251/15251 co-relation queries the response was YES. Maximal size of possible extension queue 2830. Compared 300174 event pairs, 5390 based on Foata normal form. 0/22027 useless extension candidates. Maximal degree in co-relation 124027. Up to 12222 conditions per place. [2023-08-30 15:28:16,897 INFO L137 encePairwiseOnDemand]: 466/470 looper letters, 179 selfloop transitions, 9 changer transitions 0/190 dead transitions. [2023-08-30 15:28:16,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 190 transitions, 936 flow [2023-08-30 15:28:16,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:28:16,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:28:16,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1578 transitions. [2023-08-30 15:28:16,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796352583586626 [2023-08-30 15:28:16,901 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1578 transitions. [2023-08-30 15:28:16,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1578 transitions. [2023-08-30 15:28:16,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:16,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1578 transitions. [2023-08-30 15:28:16,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 225.42857142857142) internal successors, (1578), 7 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:16,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:16,910 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:16,910 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 194 flow. Second operand 7 states and 1578 transitions. [2023-08-30 15:28:16,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 190 transitions, 936 flow [2023-08-30 15:28:16,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 190 transitions, 934 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:28:16,918 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 275 flow [2023-08-30 15:28:16,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=275, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2023-08-30 15:28:16,919 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2023-08-30 15:28:16,919 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 275 flow [2023-08-30 15:28:16,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 201.85714285714286) internal successors, (1413), 7 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:16,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:16,920 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:28:16,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 15:28:17,126 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 15:28:17,126 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:28:17,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:17,127 INFO L85 PathProgramCache]: Analyzing trace with hash -899760642, now seen corresponding path program 1 times [2023-08-30 15:28:17,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:17,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668507424] [2023-08-30 15:28:17,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:17,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:28:17,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:17,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668507424] [2023-08-30 15:28:17,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668507424] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:28:17,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030462981] [2023-08-30 15:28:17,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:17,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:17,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:28:17,220 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 15:28:17,231 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 15:28:17,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:17,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 15:28:17,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:28:17,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:17,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:28:17,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:17,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030462981] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:28:17,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:28:17,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2023-08-30 15:28:17,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487146509] [2023-08-30 15:28:17,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:28:17,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 15:28:17,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:17,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 15:28:17,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-30 15:28:17,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 470 [2023-08-30 15:28:17,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 275 flow. Second operand has 12 states, 12 states have (on average 187.58333333333334) internal successors, (2251), 12 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:17,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:17,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 470 [2023-08-30 15:28:17,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:22,137 INFO L130 PetriNetUnfolder]: 36961/50451 cut-off events. [2023-08-30 15:28:22,137 INFO L131 PetriNetUnfolder]: For 135526/138026 co-relation queries the response was YES. [2023-08-30 15:28:22,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144165 conditions, 50451 events. 36961/50451 cut-off events. For 135526/138026 co-relation queries the response was YES. Maximal size of possible extension queue 2999. Compared 335831 event pairs, 20875 based on Foata normal form. 5540/31157 useless extension candidates. Maximal degree in co-relation 144148. Up to 42173 conditions per place. [2023-08-30 15:28:22,413 INFO L137 encePairwiseOnDemand]: 462/470 looper letters, 131 selfloop transitions, 10 changer transitions 3/147 dead transitions. [2023-08-30 15:28:22,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 147 transitions, 795 flow [2023-08-30 15:28:22,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 15:28:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 15:28:22,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1800 transitions. [2023-08-30 15:28:22,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425531914893617 [2023-08-30 15:28:22,418 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1800 transitions. [2023-08-30 15:28:22,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1800 transitions. [2023-08-30 15:28:22,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:22,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1800 transitions. [2023-08-30 15:28:22,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 200.0) internal successors, (1800), 9 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 15:28:22,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 470.0) internal successors, (4700), 10 states have internal predecessors, (4700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:22,429 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 470.0) internal successors, (4700), 10 states have internal predecessors, (4700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:22,429 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 275 flow. Second operand 9 states and 1800 transitions. [2023-08-30 15:28:22,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 147 transitions, 795 flow [2023-08-30 15:28:22,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 147 transitions, 780 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 15:28:22,468 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 332 flow [2023-08-30 15:28:22,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=332, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2023-08-30 15:28:22,469 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 16 predicate places. [2023-08-30 15:28:22,469 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 332 flow [2023-08-30 15:28:22,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 187.58333333333334) internal successors, (2251), 12 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:22,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:22,471 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:28:22,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 15:28:22,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:22,676 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:28:22,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:22,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1115655072, now seen corresponding path program 2 times [2023-08-30 15:28:22,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:22,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348540448] [2023-08-30 15:28:22,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:22,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:22,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:28:22,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:22,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348540448] [2023-08-30 15:28:22,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348540448] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:28:22,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244210393] [2023-08-30 15:28:22,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:28:22,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:22,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:28:22,753 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 15:28:22,781 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 15:28:22,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:28:22,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:28:22,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:28:22,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:28:22,864 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 15:28:22,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:28:22,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244210393] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:28:22,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:28:22,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-30 15:28:22,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575353419] [2023-08-30 15:28:22,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:28:22,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:28:22,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:22,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:28:22,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 15:28:22,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 470 [2023-08-30 15:28:22,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 332 flow. Second operand has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:22,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:22,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 470 [2023-08-30 15:28:22,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:27,207 INFO L130 PetriNetUnfolder]: 37881/52076 cut-off events. [2023-08-30 15:28:27,207 INFO L131 PetriNetUnfolder]: For 28049/28049 co-relation queries the response was YES. [2023-08-30 15:28:27,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147464 conditions, 52076 events. 37881/52076 cut-off events. For 28049/28049 co-relation queries the response was YES. Maximal size of possible extension queue 3119. Compared 361995 event pairs, 1945 based on Foata normal form. 1280/28063 useless extension candidates. Maximal degree in co-relation 147442. Up to 34140 conditions per place. [2023-08-30 15:28:27,468 INFO L137 encePairwiseOnDemand]: 467/470 looper letters, 102 selfloop transitions, 3 changer transitions 0/107 dead transitions. [2023-08-30 15:28:27,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 107 transitions, 632 flow [2023-08-30 15:28:27,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:28:27,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:28:27,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 885 transitions. [2023-08-30 15:28:27,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47074468085106386 [2023-08-30 15:28:27,471 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 885 transitions. [2023-08-30 15:28:27,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 885 transitions. [2023-08-30 15:28:27,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:27,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 885 transitions. [2023-08-30 15:28:27,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 221.25) internal successors, (885), 4 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:27,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 470.0) internal successors, (2350), 5 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:27,476 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 470.0) internal successors, (2350), 5 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:27,476 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 332 flow. Second operand 4 states and 885 transitions. [2023-08-30 15:28:27,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 107 transitions, 632 flow [2023-08-30 15:28:27,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 107 transitions, 615 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-30 15:28:27,770 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 284 flow [2023-08-30 15:28:27,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2023-08-30 15:28:27,770 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 14 predicate places. [2023-08-30 15:28:27,771 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 284 flow [2023-08-30 15:28:27,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:27,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:27,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:28:27,778 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 15:28:27,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:27,972 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:28:27,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:27,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1897036264, now seen corresponding path program 1 times [2023-08-30 15:28:27,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:27,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492300753] [2023-08-30 15:28:27,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:27,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:28,067 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 15:28:28,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:28,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492300753] [2023-08-30 15:28:28,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492300753] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:28:28,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:28:28,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 15:28:28,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996327528] [2023-08-30 15:28:28,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:28:28,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:28:28,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:28,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:28:28,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 15:28:28,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 470 [2023-08-30 15:28:28,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 284 flow. Second operand has 4 states, 4 states have (on average 194.25) internal successors, (777), 4 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:28,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:28,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 470 [2023-08-30 15:28:28,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:31,097 INFO L130 PetriNetUnfolder]: 26974/37454 cut-off events. [2023-08-30 15:28:31,097 INFO L131 PetriNetUnfolder]: For 85194/87218 co-relation queries the response was YES. [2023-08-30 15:28:31,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108461 conditions, 37454 events. 26974/37454 cut-off events. For 85194/87218 co-relation queries the response was YES. Maximal size of possible extension queue 2375. Compared 254108 event pairs, 18102 based on Foata normal form. 2172/21499 useless extension candidates. Maximal degree in co-relation 108440. Up to 36992 conditions per place. [2023-08-30 15:28:31,284 INFO L137 encePairwiseOnDemand]: 454/470 looper letters, 62 selfloop transitions, 9 changer transitions 6/80 dead transitions. [2023-08-30 15:28:31,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 80 transitions, 579 flow [2023-08-30 15:28:31,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:28:31,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:28:31,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1022 transitions. [2023-08-30 15:28:31,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4348936170212766 [2023-08-30 15:28:31,287 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1022 transitions. [2023-08-30 15:28:31,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1022 transitions. [2023-08-30 15:28:31,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:31,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1022 transitions. [2023-08-30 15:28:31,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 204.4) internal successors, (1022), 5 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:31,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:31,294 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:31,294 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 284 flow. Second operand 5 states and 1022 transitions. [2023-08-30 15:28:31,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 80 transitions, 579 flow [2023-08-30 15:28:31,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 80 transitions, 573 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 15:28:31,325 INFO L231 Difference]: Finished difference. Result has 75 places, 61 transitions, 335 flow [2023-08-30 15:28:31,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=335, PETRI_PLACES=75, PETRI_TRANSITIONS=61} [2023-08-30 15:28:31,326 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2023-08-30 15:28:31,326 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 61 transitions, 335 flow [2023-08-30 15:28:31,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 194.25) internal successors, (777), 4 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:31,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:31,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:28:31,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 15:28:31,327 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:28:31,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:31,328 INFO L85 PathProgramCache]: Analyzing trace with hash -639398407, now seen corresponding path program 1 times [2023-08-30 15:28:31,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:31,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7138322] [2023-08-30 15:28:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:31,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:31,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:31,430 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 15:28:31,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:31,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7138322] [2023-08-30 15:28:31,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7138322] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:28:31,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:28:31,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:28:31,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322629862] [2023-08-30 15:28:31,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:28:31,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:28:31,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:31,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:28:31,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:28:31,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 470 [2023-08-30 15:28:31,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 61 transitions, 335 flow. Second operand has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:31,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:31,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 470 [2023-08-30 15:28:31,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:34,399 INFO L130 PetriNetUnfolder]: 27186/37986 cut-off events. [2023-08-30 15:28:34,399 INFO L131 PetriNetUnfolder]: For 104034/106178 co-relation queries the response was YES. [2023-08-30 15:28:34,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131302 conditions, 37986 events. 27186/37986 cut-off events. For 104034/106178 co-relation queries the response was YES. Maximal size of possible extension queue 2223. Compared 240250 event pairs, 5338 based on Foata normal form. 2944/22150 useless extension candidates. Maximal degree in co-relation 131278. Up to 34169 conditions per place. [2023-08-30 15:28:34,612 INFO L137 encePairwiseOnDemand]: 460/470 looper letters, 70 selfloop transitions, 5 changer transitions 3/81 dead transitions. [2023-08-30 15:28:34,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 81 transitions, 619 flow [2023-08-30 15:28:34,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:28:34,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:28:34,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 651 transitions. [2023-08-30 15:28:34,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46170212765957447 [2023-08-30 15:28:34,614 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 651 transitions. [2023-08-30 15:28:34,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 651 transitions. [2023-08-30 15:28:34,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:34,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 651 transitions. [2023-08-30 15:28:34,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:34,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:34,619 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:34,619 INFO L175 Difference]: Start difference. First operand has 75 places, 61 transitions, 335 flow. Second operand 3 states and 651 transitions. [2023-08-30 15:28:34,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 81 transitions, 619 flow [2023-08-30 15:28:34,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 81 transitions, 598 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 15:28:34,643 INFO L231 Difference]: Finished difference. Result has 75 places, 62 transitions, 340 flow [2023-08-30 15:28:34,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=340, PETRI_PLACES=75, PETRI_TRANSITIONS=62} [2023-08-30 15:28:34,643 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2023-08-30 15:28:34,644 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 62 transitions, 340 flow [2023-08-30 15:28:34,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:34,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:34,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:28:34,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 15:28:34,645 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:28:34,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:34,645 INFO L85 PathProgramCache]: Analyzing trace with hash 366182754, now seen corresponding path program 1 times [2023-08-30 15:28:34,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:34,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984404082] [2023-08-30 15:28:34,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:34,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:34,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 15:28:34,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:34,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984404082] [2023-08-30 15:28:34,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984404082] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:28:34,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:28:34,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:28:34,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873194416] [2023-08-30 15:28:34,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:28:34,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:28:34,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:34,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:28:34,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:28:34,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 470 [2023-08-30 15:28:34,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 62 transitions, 340 flow. Second operand has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:34,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:34,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 470 [2023-08-30 15:28:34,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:37,662 INFO L130 PetriNetUnfolder]: 24131/33774 cut-off events. [2023-08-30 15:28:37,663 INFO L131 PetriNetUnfolder]: For 62589/62669 co-relation queries the response was YES. [2023-08-30 15:28:37,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132157 conditions, 33774 events. 24131/33774 cut-off events. For 62589/62669 co-relation queries the response was YES. Maximal size of possible extension queue 2254. Compared 211014 event pairs, 9756 based on Foata normal form. 120/18202 useless extension candidates. Maximal degree in co-relation 132133. Up to 33655 conditions per place. [2023-08-30 15:28:37,844 INFO L137 encePairwiseOnDemand]: 466/470 looper letters, 59 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2023-08-30 15:28:37,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 482 flow [2023-08-30 15:28:37,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:28:37,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:28:37,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 632 transitions. [2023-08-30 15:28:37,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482269503546099 [2023-08-30 15:28:37,847 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 632 transitions. [2023-08-30 15:28:37,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 632 transitions. [2023-08-30 15:28:37,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:37,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 632 transitions. [2023-08-30 15:28:37,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:37,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:37,851 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:37,851 INFO L175 Difference]: Start difference. First operand has 75 places, 62 transitions, 340 flow. Second operand 3 states and 632 transitions. [2023-08-30 15:28:37,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 482 flow [2023-08-30 15:28:37,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 67 transitions, 455 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-08-30 15:28:37,874 INFO L231 Difference]: Finished difference. Result has 71 places, 62 transitions, 334 flow [2023-08-30 15:28:37,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=334, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2023-08-30 15:28:37,875 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 14 predicate places. [2023-08-30 15:28:37,875 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 334 flow [2023-08-30 15:28:37,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:37,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:37,876 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 15:28:37,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 15:28:37,876 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:28:37,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:37,876 INFO L85 PathProgramCache]: Analyzing trace with hash 2026630147, now seen corresponding path program 2 times [2023-08-30 15:28:37,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:37,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632797998] [2023-08-30 15:28:37,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:37,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:28:37,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:37,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632797998] [2023-08-30 15:28:37,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632797998] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:28:37,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103393449] [2023-08-30 15:28:37,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:28:37,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:37,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:28:37,956 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 15:28:37,959 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 15:28:38,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:28:38,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:28:38,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:28:38,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:28:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-30 15:28:38,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:28:38,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103393449] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:28:38,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:28:38,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-08-30 15:28:38,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605490463] [2023-08-30 15:28:38,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:28:38,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:28:38,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:38,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:28:38,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 15:28:38,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 470 [2023-08-30 15:28:38,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 334 flow. Second operand has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:38,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:38,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 470 [2023-08-30 15:28:38,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:40,891 INFO L130 PetriNetUnfolder]: 22579/31766 cut-off events. [2023-08-30 15:28:40,891 INFO L131 PetriNetUnfolder]: For 53640/53720 co-relation queries the response was YES. [2023-08-30 15:28:40,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119448 conditions, 31766 events. 22579/31766 cut-off events. For 53640/53720 co-relation queries the response was YES. Maximal size of possible extension queue 2122. Compared 199005 event pairs, 12732 based on Foata normal form. 626/17572 useless extension candidates. Maximal degree in co-relation 119424. Up to 31646 conditions per place. [2023-08-30 15:28:41,074 INFO L137 encePairwiseOnDemand]: 468/470 looper letters, 56 selfloop transitions, 1 changer transitions 1/61 dead transitions. [2023-08-30 15:28:41,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 61 transitions, 438 flow [2023-08-30 15:28:41,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:28:41,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:28:41,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 636 transitions. [2023-08-30 15:28:41,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.451063829787234 [2023-08-30 15:28:41,076 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 636 transitions. [2023-08-30 15:28:41,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 636 transitions. [2023-08-30 15:28:41,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:41,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 636 transitions. [2023-08-30 15:28:41,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:41,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:41,080 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:41,080 INFO L175 Difference]: Start difference. First operand has 71 places, 62 transitions, 334 flow. Second operand 3 states and 636 transitions. [2023-08-30 15:28:41,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 61 transitions, 438 flow [2023-08-30 15:28:41,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 61 transitions, 405 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-30 15:28:41,106 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 285 flow [2023-08-30 15:28:41,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=285, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2023-08-30 15:28:41,106 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2023-08-30 15:28:41,106 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 285 flow [2023-08-30 15:28:41,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:41,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:41,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:28:41,113 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 15:28:41,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:41,312 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:28:41,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:41,312 INFO L85 PathProgramCache]: Analyzing trace with hash 672794766, now seen corresponding path program 1 times [2023-08-30 15:28:41,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:41,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529759720] [2023-08-30 15:28:41,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:41,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:42,037 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 15:28:42,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:42,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529759720] [2023-08-30 15:28:42,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529759720] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:28:42,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227353736] [2023-08-30 15:28:42,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:42,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:42,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:28:42,039 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 15:28:42,064 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 15:28:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:42,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 15:28:42,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:28:42,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:28:42,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 15:28:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:28:42,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:28:42,424 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_483 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_483) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483649)) is different from false [2023-08-30 15:28:42,459 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:28:42,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-08-30 15:28:42,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-08-30 15:28:42,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:28:42,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227353736] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:28:42,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:28:42,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 19 [2023-08-30 15:28:42,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859653256] [2023-08-30 15:28:42,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:28:42,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 15:28:42,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:42,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 15:28:42,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=319, Unknown=1, NotChecked=36, Total=420 [2023-08-30 15:28:42,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 470 [2023-08-30 15:28:42,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 285 flow. Second operand has 21 states, 21 states have (on average 140.66666666666666) internal successors, (2954), 21 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:42,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:42,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 470 [2023-08-30 15:28:42,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:47,167 INFO L130 PetriNetUnfolder]: 26081/37081 cut-off events. [2023-08-30 15:28:47,167 INFO L131 PetriNetUnfolder]: For 29800/29908 co-relation queries the response was YES. [2023-08-30 15:28:47,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131205 conditions, 37081 events. 26081/37081 cut-off events. For 29800/29908 co-relation queries the response was YES. Maximal size of possible extension queue 2312. Compared 247281 event pairs, 1588 based on Foata normal form. 108/20529 useless extension candidates. Maximal degree in co-relation 131184. Up to 21825 conditions per place. [2023-08-30 15:28:47,398 INFO L137 encePairwiseOnDemand]: 450/470 looper letters, 203 selfloop transitions, 64 changer transitions 0/269 dead transitions. [2023-08-30 15:28:47,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 269 transitions, 1701 flow [2023-08-30 15:28:47,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 15:28:47,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 15:28:47,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3159 transitions. [2023-08-30 15:28:47,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3200607902735562 [2023-08-30 15:28:47,406 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3159 transitions. [2023-08-30 15:28:47,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3159 transitions. [2023-08-30 15:28:47,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:47,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3159 transitions. [2023-08-30 15:28:47,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 150.42857142857142) internal successors, (3159), 21 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:47,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 470.0) internal successors, (10340), 22 states have internal predecessors, (10340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:47,424 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 470.0) internal successors, (10340), 22 states have internal predecessors, (10340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:47,425 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 285 flow. Second operand 21 states and 3159 transitions. [2023-08-30 15:28:47,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 269 transitions, 1701 flow [2023-08-30 15:28:47,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 269 transitions, 1700 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:28:47,436 INFO L231 Difference]: Finished difference. Result has 98 places, 112 transitions, 847 flow [2023-08-30 15:28:47,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=847, PETRI_PLACES=98, PETRI_TRANSITIONS=112} [2023-08-30 15:28:47,436 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 41 predicate places. [2023-08-30 15:28:47,436 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 112 transitions, 847 flow [2023-08-30 15:28:47,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 140.66666666666666) internal successors, (2954), 21 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:47,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:47,438 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:28:47,445 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 15:28:47,642 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,SelfDestructingSolverStorable14 [2023-08-30 15:28:47,643 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:28:47,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:47,643 INFO L85 PathProgramCache]: Analyzing trace with hash -111879881, now seen corresponding path program 1 times [2023-08-30 15:28:47,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:47,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907660167] [2023-08-30 15:28:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:47,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:28:47,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:47,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907660167] [2023-08-30 15:28:47,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907660167] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:28:47,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564329401] [2023-08-30 15:28:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:47,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:47,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:28:47,774 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 15:28:47,972 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 15:28:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:48,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:28:48,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:28:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 15:28:48,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:28:48,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564329401] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:28:48,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:28:48,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-30 15:28:48,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823960341] [2023-08-30 15:28:48,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:28:48,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:28:48,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:48,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:28:48,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 15:28:48,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 470 [2023-08-30 15:28:48,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 112 transitions, 847 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:48,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:48,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 470 [2023-08-30 15:28:48,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:50,763 INFO L130 PetriNetUnfolder]: 19549/28181 cut-off events. [2023-08-30 15:28:50,763 INFO L131 PetriNetUnfolder]: For 79467/79555 co-relation queries the response was YES. [2023-08-30 15:28:50,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128422 conditions, 28181 events. 19549/28181 cut-off events. For 79467/79555 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 181273 event pairs, 9952 based on Foata normal form. 1320/20425 useless extension candidates. Maximal degree in co-relation 128387. Up to 27757 conditions per place. [2023-08-30 15:28:50,989 INFO L137 encePairwiseOnDemand]: 467/470 looper letters, 103 selfloop transitions, 1 changer transitions 0/108 dead transitions. [2023-08-30 15:28:50,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 108 transitions, 1025 flow [2023-08-30 15:28:50,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:28:50,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:28:50,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 635 transitions. [2023-08-30 15:28:50,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450354609929078 [2023-08-30 15:28:50,991 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 635 transitions. [2023-08-30 15:28:50,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 635 transitions. [2023-08-30 15:28:50,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:50,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 635 transitions. [2023-08-30 15:28:50,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 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 15:28:50,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:50,995 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:50,995 INFO L175 Difference]: Start difference. First operand has 98 places, 112 transitions, 847 flow. Second operand 3 states and 635 transitions. [2023-08-30 15:28:50,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 108 transitions, 1025 flow [2023-08-30 15:28:51,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 108 transitions, 979 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-08-30 15:28:51,084 INFO L231 Difference]: Finished difference. Result has 95 places, 108 transitions, 773 flow [2023-08-30 15:28:51,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=773, PETRI_PLACES=95, PETRI_TRANSITIONS=108} [2023-08-30 15:28:51,085 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2023-08-30 15:28:51,085 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 108 transitions, 773 flow [2023-08-30 15:28:51,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:51,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:51,086 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:28:51,097 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 15:28:51,290 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,SelfDestructingSolverStorable15 [2023-08-30 15:28:51,291 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:28:51,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:51,291 INFO L85 PathProgramCache]: Analyzing trace with hash -111879884, now seen corresponding path program 1 times [2023-08-30 15:28:51,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:51,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781578081] [2023-08-30 15:28:51,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:51,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:28:51,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:51,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781578081] [2023-08-30 15:28:51,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781578081] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:28:51,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072792860] [2023-08-30 15:28:51,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:51,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:51,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:28:51,906 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 15:28:51,920 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 15:28:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:52,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 15:28:52,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:28:52,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:28:52,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 15:28:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 15:28:52,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:28:52,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072792860] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:28:52,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:28:52,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-08-30 15:28:52,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055744792] [2023-08-30 15:28:52,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:28:52,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:28:52,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:52,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:28:52,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-08-30 15:28:52,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 470 [2023-08-30 15:28:52,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 108 transitions, 773 flow. Second operand has 7 states, 7 states have (on average 183.71428571428572) internal successors, (1286), 7 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:52,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:52,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 470 [2023-08-30 15:28:52,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:55,832 INFO L130 PetriNetUnfolder]: 23921/34705 cut-off events. [2023-08-30 15:28:55,833 INFO L131 PetriNetUnfolder]: For 91001/91109 co-relation queries the response was YES. [2023-08-30 15:28:55,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155500 conditions, 34705 events. 23921/34705 cut-off events. For 91001/91109 co-relation queries the response was YES. Maximal size of possible extension queue 2277. Compared 235368 event pairs, 4120 based on Foata normal form. 804/24445 useless extension candidates. Maximal degree in co-relation 155464. Up to 22273 conditions per place. [2023-08-30 15:28:56,085 INFO L137 encePairwiseOnDemand]: 461/470 looper letters, 123 selfloop transitions, 24 changer transitions 0/149 dead transitions. [2023-08-30 15:28:56,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 149 transitions, 1360 flow [2023-08-30 15:28:56,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 15:28:56,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 15:28:56,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1163 transitions. [2023-08-30 15:28:56,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4124113475177305 [2023-08-30 15:28:56,087 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1163 transitions. [2023-08-30 15:28:56,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1163 transitions. [2023-08-30 15:28:56,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:56,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1163 transitions. [2023-08-30 15:28:56,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 193.83333333333334) internal successors, (1163), 6 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:56,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:56,093 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:56,093 INFO L175 Difference]: Start difference. First operand has 95 places, 108 transitions, 773 flow. Second operand 6 states and 1163 transitions. [2023-08-30 15:28:56,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 149 transitions, 1360 flow [2023-08-30 15:28:56,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 149 transitions, 1359 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:28:56,256 INFO L231 Difference]: Finished difference. Result has 102 places, 111 transitions, 907 flow [2023-08-30 15:28:56,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=907, PETRI_PLACES=102, PETRI_TRANSITIONS=111} [2023-08-30 15:28:56,256 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 45 predicate places. [2023-08-30 15:28:56,257 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 111 transitions, 907 flow [2023-08-30 15:28:56,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 183.71428571428572) internal successors, (1286), 7 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:56,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:56,257 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:28:56,265 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 15:28:56,464 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,SelfDestructingSolverStorable16 [2023-08-30 15:28:56,464 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:28:56,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:56,464 INFO L85 PathProgramCache]: Analyzing trace with hash -111879798, now seen corresponding path program 1 times [2023-08-30 15:28:56,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:56,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914932307] [2023-08-30 15:28:56,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:56,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:56,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 15:28:56,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:56,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914932307] [2023-08-30 15:28:56,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914932307] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:28:56,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:28:56,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:28:56,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551734679] [2023-08-30 15:28:56,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:28:56,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:28:56,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:56,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:28:56,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:28:56,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 470 [2023-08-30 15:28:56,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 111 transitions, 907 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:56,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:56,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 470 [2023-08-30 15:28:56,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:59,404 INFO L130 PetriNetUnfolder]: 19661/28789 cut-off events. [2023-08-30 15:28:59,404 INFO L131 PetriNetUnfolder]: For 115421/115509 co-relation queries the response was YES. [2023-08-30 15:28:59,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136116 conditions, 28789 events. 19661/28789 cut-off events. For 115421/115509 co-relation queries the response was YES. Maximal size of possible extension queue 1834. Compared 192580 event pairs, 9704 based on Foata normal form. 88/20785 useless extension candidates. Maximal degree in co-relation 136076. Up to 24209 conditions per place. [2023-08-30 15:28:59,605 INFO L137 encePairwiseOnDemand]: 467/470 looper letters, 109 selfloop transitions, 8 changer transitions 0/121 dead transitions. [2023-08-30 15:28:59,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 121 transitions, 1189 flow [2023-08-30 15:28:59,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:28:59,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:28:59,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 644 transitions. [2023-08-30 15:28:59,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45673758865248226 [2023-08-30 15:28:59,607 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 644 transitions. [2023-08-30 15:28:59,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 644 transitions. [2023-08-30 15:28:59,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:59,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 644 transitions. [2023-08-30 15:28:59,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:59,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:59,610 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:59,610 INFO L175 Difference]: Start difference. First operand has 102 places, 111 transitions, 907 flow. Second operand 3 states and 644 transitions. [2023-08-30 15:28:59,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 121 transitions, 1189 flow [2023-08-30 15:28:59,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 121 transitions, 1163 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 15:28:59,799 INFO L231 Difference]: Finished difference. Result has 101 places, 106 transitions, 849 flow [2023-08-30 15:28:59,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=849, PETRI_PLACES=101, PETRI_TRANSITIONS=106} [2023-08-30 15:28:59,799 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 44 predicate places. [2023-08-30 15:28:59,799 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 106 transitions, 849 flow [2023-08-30 15:28:59,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:59,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:59,800 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:28:59,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 15:28:59,800 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:28:59,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:59,800 INFO L85 PathProgramCache]: Analyzing trace with hash -111879698, now seen corresponding path program 1 times [2023-08-30 15:28:59,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:59,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532213047] [2023-08-30 15:28:59,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:59,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:29:00,746 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 15:29:00,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:29:00,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532213047] [2023-08-30 15:29:00,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532213047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:29:00,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297842169] [2023-08-30 15:29:00,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:29:00,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:29:00,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:29:00,749 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 15:29:00,759 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 15:29:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:29:00,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 15:29:00,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:29:00,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:29:00,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 15:29:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 15:29:01,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:29:01,118 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:29:01,118 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 46 treesize of output 38 [2023-08-30 15:29:01,129 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 11 treesize of output 5 [2023-08-30 15:29:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 15:29:01,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297842169] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 15:29:01,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 15:29:01,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 6] total 19 [2023-08-30 15:29:01,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049757160] [2023-08-30 15:29:01,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:29:01,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:29:01,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:29:01,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:29:01,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=357, Unknown=4, NotChecked=0, Total=420 [2023-08-30 15:29:03,302 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 15:29:03,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 470 [2023-08-30 15:29:03,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 106 transitions, 849 flow. Second operand has 7 states, 7 states have (on average 167.71428571428572) internal successors, (1174), 7 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:03,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:29:03,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 470 [2023-08-30 15:29:03,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:29:06,384 INFO L130 PetriNetUnfolder]: 18677/27505 cut-off events. [2023-08-30 15:29:06,384 INFO L131 PetriNetUnfolder]: For 109013/109121 co-relation queries the response was YES. [2023-08-30 15:29:06,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131360 conditions, 27505 events. 18677/27505 cut-off events. For 109013/109121 co-relation queries the response was YES. Maximal size of possible extension queue 1649. Compared 182879 event pairs, 4456 based on Foata normal form. 364/20853 useless extension candidates. Maximal degree in co-relation 131320. Up to 19129 conditions per place. [2023-08-30 15:29:06,613 INFO L137 encePairwiseOnDemand]: 460/470 looper letters, 109 selfloop transitions, 48 changer transitions 0/159 dead transitions. [2023-08-30 15:29:06,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 159 transitions, 1564 flow [2023-08-30 15:29:06,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:29:06,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:29:06,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1234 transitions. [2023-08-30 15:29:06,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3750759878419453 [2023-08-30 15:29:06,615 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1234 transitions. [2023-08-30 15:29:06,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1234 transitions. [2023-08-30 15:29:06,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:29:06,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1234 transitions. [2023-08-30 15:29:06,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 176.28571428571428) internal successors, (1234), 7 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:06,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:06,620 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:06,620 INFO L175 Difference]: Start difference. First operand has 101 places, 106 transitions, 849 flow. Second operand 7 states and 1234 transitions. [2023-08-30 15:29:06,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 159 transitions, 1564 flow [2023-08-30 15:29:07,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 159 transitions, 1546 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 15:29:07,078 INFO L231 Difference]: Finished difference. Result has 109 places, 120 transitions, 1167 flow [2023-08-30 15:29:07,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1167, PETRI_PLACES=109, PETRI_TRANSITIONS=120} [2023-08-30 15:29:07,078 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 52 predicate places. [2023-08-30 15:29:07,079 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 120 transitions, 1167 flow [2023-08-30 15:29:07,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 167.71428571428572) internal successors, (1174), 7 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:07,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:29:07,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:29:07,083 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 15:29:07,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:29:07,283 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:29:07,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:29:07,283 INFO L85 PathProgramCache]: Analyzing trace with hash -289923211, now seen corresponding path program 1 times [2023-08-30 15:29:07,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:29:07,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113887882] [2023-08-30 15:29:07,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:29:07,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:29:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:29:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:29:07,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:29:07,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113887882] [2023-08-30 15:29:07,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113887882] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:29:07,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840207881] [2023-08-30 15:29:07,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:29:07,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:29:07,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:29:07,585 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 15:29:07,610 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 15:29:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:29:07,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 15:29:07,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:29:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:29:07,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:29:07,876 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 15:29:07,876 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 26 treesize of output 13 [2023-08-30 15:29:07,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:29:07,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840207881] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:29:07,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:29:07,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-30 15:29:07,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47438685] [2023-08-30 15:29:07,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:29:07,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 15:29:07,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:29:07,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 15:29:07,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-08-30 15:29:08,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 470 [2023-08-30 15:29:08,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 120 transitions, 1167 flow. Second operand has 16 states, 16 states have (on average 174.25) internal successors, (2788), 16 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 15:29:08,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:29:08,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 470 [2023-08-30 15:29:08,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:29:11,842 INFO L130 PetriNetUnfolder]: 19397/28585 cut-off events. [2023-08-30 15:29:11,843 INFO L131 PetriNetUnfolder]: For 130033/130141 co-relation queries the response was YES. [2023-08-30 15:29:11,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142696 conditions, 28585 events. 19397/28585 cut-off events. For 130033/130141 co-relation queries the response was YES. Maximal size of possible extension queue 1726. Compared 195447 event pairs, 1428 based on Foata normal form. 200/21613 useless extension candidates. Maximal degree in co-relation 142652. Up to 14121 conditions per place. [2023-08-30 15:29:12,060 INFO L137 encePairwiseOnDemand]: 457/470 looper letters, 187 selfloop transitions, 65 changer transitions 0/254 dead transitions. [2023-08-30 15:29:12,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 254 transitions, 2516 flow [2023-08-30 15:29:12,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 15:29:12,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 15:29:12,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2750 transitions. [2023-08-30 15:29:12,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3900709219858156 [2023-08-30 15:29:12,065 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2750 transitions. [2023-08-30 15:29:12,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2750 transitions. [2023-08-30 15:29:12,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:29:12,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2750 transitions. [2023-08-30 15:29:12,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 183.33333333333334) internal successors, (2750), 15 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:12,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 470.0) internal successors, (7520), 16 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:12,075 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 470.0) internal successors, (7520), 16 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:12,075 INFO L175 Difference]: Start difference. First operand has 109 places, 120 transitions, 1167 flow. Second operand 15 states and 2750 transitions. [2023-08-30 15:29:12,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 254 transitions, 2516 flow [2023-08-30 15:29:12,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 254 transitions, 2479 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-30 15:29:12,763 INFO L231 Difference]: Finished difference. Result has 125 places, 133 transitions, 1513 flow [2023-08-30 15:29:12,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1513, PETRI_PLACES=125, PETRI_TRANSITIONS=133} [2023-08-30 15:29:12,764 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 68 predicate places. [2023-08-30 15:29:12,764 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 133 transitions, 1513 flow [2023-08-30 15:29:12,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 174.25) internal successors, (2788), 16 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 15:29:12,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:29:12,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:29:12,771 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 15:29:12,970 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 15:29:12,972 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:29:12,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:29:12,972 INFO L85 PathProgramCache]: Analyzing trace with hash 672794765, now seen corresponding path program 2 times [2023-08-30 15:29:12,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:29:12,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964300265] [2023-08-30 15:29:12,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:29:12,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:29:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:29:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:29:13,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:29:13,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964300265] [2023-08-30 15:29:13,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964300265] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:29:13,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741749859] [2023-08-30 15:29:13,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:29:13,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:29:13,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:29:13,377 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 15:29:13,404 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 15:29:13,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:29:13,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:29:13,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 15:29:13,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:29:13,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:29:13,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 15:29:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 15:29:13,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:29:13,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741749859] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:29:13,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:29:13,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-08-30 15:29:13,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838777255] [2023-08-30 15:29:13,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:29:13,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:29:13,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:29:13,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:29:13,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-08-30 15:29:13,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 470 [2023-08-30 15:29:13,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 133 transitions, 1513 flow. Second operand has 7 states, 7 states have (on average 183.71428571428572) internal successors, (1286), 7 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:13,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:29:13,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 470 [2023-08-30 15:29:13,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:29:17,088 INFO L130 PetriNetUnfolder]: 19661/29089 cut-off events. [2023-08-30 15:29:17,088 INFO L131 PetriNetUnfolder]: For 192681/192789 co-relation queries the response was YES. [2023-08-30 15:29:17,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156784 conditions, 29089 events. 19661/29089 cut-off events. For 192681/192789 co-relation queries the response was YES. Maximal size of possible extension queue 1768. Compared 198824 event pairs, 5080 based on Foata normal form. 180/22577 useless extension candidates. Maximal degree in co-relation 156735. Up to 17565 conditions per place. [2023-08-30 15:29:17,333 INFO L137 encePairwiseOnDemand]: 461/470 looper letters, 120 selfloop transitions, 46 changer transitions 0/168 dead transitions. [2023-08-30 15:29:17,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 168 transitions, 2084 flow [2023-08-30 15:29:17,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 15:29:17,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 15:29:17,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1165 transitions. [2023-08-30 15:29:17,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41312056737588654 [2023-08-30 15:29:17,334 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1165 transitions. [2023-08-30 15:29:17,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1165 transitions. [2023-08-30 15:29:17,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:29:17,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1165 transitions. [2023-08-30 15:29:17,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 194.16666666666666) internal successors, (1165), 6 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:17,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:17,338 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:17,338 INFO L175 Difference]: Start difference. First operand has 125 places, 133 transitions, 1513 flow. Second operand 6 states and 1165 transitions. [2023-08-30 15:29:17,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 168 transitions, 2084 flow [2023-08-30 15:29:18,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 168 transitions, 1976 flow, removed 22 selfloop flow, removed 7 redundant places. [2023-08-30 15:29:18,314 INFO L231 Difference]: Finished difference. Result has 125 places, 134 transitions, 1611 flow [2023-08-30 15:29:18,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1611, PETRI_PLACES=125, PETRI_TRANSITIONS=134} [2023-08-30 15:29:18,315 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 68 predicate places. [2023-08-30 15:29:18,315 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 134 transitions, 1611 flow [2023-08-30 15:29:18,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 183.71428571428572) internal successors, (1286), 7 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:18,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:29:18,315 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:29:18,321 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 15:29:18,516 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 15:29:18,517 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:29:18,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:29:18,517 INFO L85 PathProgramCache]: Analyzing trace with hash -111879883, now seen corresponding path program 1 times [2023-08-30 15:29:18,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:29:18,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98947033] [2023-08-30 15:29:18,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:29:18,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:29:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:29:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:29:19,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:29:19,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98947033] [2023-08-30 15:29:19,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98947033] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:29:19,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800986248] [2023-08-30 15:29:19,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:29:19,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:29:19,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:29:19,217 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 15:29:19,245 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 15:29:19,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:29:19,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 15:29:19,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:29:19,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:29:19,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 15:29:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 15:29:19,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:29:19,535 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_817 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_817) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483649)) is different from false [2023-08-30 15:29:19,548 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:29:19,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-08-30 15:29:19,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-08-30 15:29:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 15:29:19,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800986248] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 15:29:19,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 15:29:19,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 18 [2023-08-30 15:29:19,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434975563] [2023-08-30 15:29:19,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:29:19,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:29:19,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:29:19,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:29:19,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=290, Unknown=1, NotChecked=34, Total=380 [2023-08-30 15:29:19,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 470 [2023-08-30 15:29:19,645 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 134 transitions, 1611 flow. Second operand has 7 states, 7 states have (on average 169.71428571428572) internal successors, (1188), 7 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:19,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:29:19,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 470 [2023-08-30 15:29:19,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:29:23,057 INFO L130 PetriNetUnfolder]: 19941/29717 cut-off events. [2023-08-30 15:29:23,057 INFO L131 PetriNetUnfolder]: For 221405/221513 co-relation queries the response was YES. [2023-08-30 15:29:23,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165572 conditions, 29717 events. 19941/29717 cut-off events. For 221405/221513 co-relation queries the response was YES. Maximal size of possible extension queue 1691. Compared 206435 event pairs, 1888 based on Foata normal form. 452/23641 useless extension candidates. Maximal degree in co-relation 165523. Up to 18080 conditions per place. [2023-08-30 15:29:23,310 INFO L137 encePairwiseOnDemand]: 454/470 looper letters, 100 selfloop transitions, 79 changer transitions 0/181 dead transitions. [2023-08-30 15:29:23,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 181 transitions, 2355 flow [2023-08-30 15:29:23,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:29:23,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:29:23,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1251 transitions. [2023-08-30 15:29:23,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3802431610942249 [2023-08-30 15:29:23,311 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1251 transitions. [2023-08-30 15:29:23,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1251 transitions. [2023-08-30 15:29:23,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:29:23,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1251 transitions. [2023-08-30 15:29:23,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 178.71428571428572) internal successors, (1251), 7 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:23,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:23,316 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:23,316 INFO L175 Difference]: Start difference. First operand has 125 places, 134 transitions, 1611 flow. Second operand 7 states and 1251 transitions. [2023-08-30 15:29:23,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 181 transitions, 2355 flow [2023-08-30 15:29:24,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 181 transitions, 2280 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-08-30 15:29:24,109 INFO L231 Difference]: Finished difference. Result has 132 places, 150 transitions, 2044 flow [2023-08-30 15:29:24,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=1501, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2044, PETRI_PLACES=132, PETRI_TRANSITIONS=150} [2023-08-30 15:29:24,109 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 75 predicate places. [2023-08-30 15:29:24,110 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 150 transitions, 2044 flow [2023-08-30 15:29:24,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 169.71428571428572) internal successors, (1188), 7 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:24,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:29:24,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:29:24,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-30 15:29:24,313 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 15:29:24,313 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:29:24,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:29:24,313 INFO L85 PathProgramCache]: Analyzing trace with hash -396417577, now seen corresponding path program 1 times [2023-08-30 15:29:24,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:29:24,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144605924] [2023-08-30 15:29:24,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:29:24,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:29:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:29:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:29:24,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:29:24,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144605924] [2023-08-30 15:29:24,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144605924] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:29:24,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97179259] [2023-08-30 15:29:24,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:29:24,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:29:24,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:29:24,685 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 15:29:24,688 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 15:29:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:29:24,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 15:29:24,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:29:24,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:29:24,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:29:24,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:29:24,863 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 15:29:24,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 15:29:24,928 INFO L350 Elim1Store]: Elim1 eliminated variable 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 15:29:25,016 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 15:29:25,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 15:29:25,074 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 18 treesize of output 20 [2023-08-30 15:29:25,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:29:25,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 15:29:25,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:29:25,192 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 18 treesize of output 20 [2023-08-30 15:29:25,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:29:25,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 15:29:25,361 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 15:29:25,362 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 23 treesize of output 10 [2023-08-30 15:29:25,378 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 15:29:25,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:29:25,421 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_879 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_879) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483649)) is different from false [2023-08-30 15:29:25,702 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:29:25,702 INFO L350 Elim1Store]: Elim1 eliminated variable 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 35 treesize of output 36 [2023-08-30 15:29:25,715 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:29:25,715 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 307 treesize of output 299 [2023-08-30 15:29:25,725 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 288 treesize of output 240 [2023-08-30 15:29:25,735 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 240 treesize of output 216 [2023-08-30 15:29:25,744 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 216 treesize of output 204 [2023-08-30 15:29:25,756 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 104 treesize of output 98 [2023-08-30 15:29:26,269 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 15:29:26,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97179259] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:29:26,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:29:26,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2023-08-30 15:29:26,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464812895] [2023-08-30 15:29:26,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:29:26,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 15:29:26,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:29:26,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 15:29:26,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=514, Unknown=7, NotChecked=46, Total=650 [2023-08-30 15:29:26,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 470 [2023-08-30 15:29:26,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 150 transitions, 2044 flow. Second operand has 26 states, 26 states have (on average 139.5) internal successors, (3627), 26 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:26,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:29:26,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 470 [2023-08-30 15:29:26,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:29:34,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 15:29:39,391 INFO L130 PetriNetUnfolder]: 22753/34666 cut-off events. [2023-08-30 15:29:39,391 INFO L131 PetriNetUnfolder]: For 395489/395609 co-relation queries the response was YES. [2023-08-30 15:29:39,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211080 conditions, 34666 events. 22753/34666 cut-off events. For 395489/395609 co-relation queries the response was YES. Maximal size of possible extension queue 1970. Compared 257104 event pairs, 4584 based on Foata normal form. 304/28058 useless extension candidates. Maximal degree in co-relation 211026. Up to 15513 conditions per place. [2023-08-30 15:29:39,697 INFO L137 encePairwiseOnDemand]: 451/470 looper letters, 262 selfloop transitions, 105 changer transitions 0/369 dead transitions. [2023-08-30 15:29:39,698 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 369 transitions, 4561 flow [2023-08-30 15:29:39,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 15:29:39,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 15:29:39,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3680 transitions. [2023-08-30 15:29:39,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3131914893617021 [2023-08-30 15:29:39,702 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3680 transitions. [2023-08-30 15:29:39,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3680 transitions. [2023-08-30 15:29:39,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:29:39,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3680 transitions. [2023-08-30 15:29:39,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 147.2) internal successors, (3680), 25 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:39,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 470.0) internal successors, (12220), 26 states have internal predecessors, (12220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:39,715 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 470.0) internal successors, (12220), 26 states have internal predecessors, (12220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:39,715 INFO L175 Difference]: Start difference. First operand has 132 places, 150 transitions, 2044 flow. Second operand 25 states and 3680 transitions. [2023-08-30 15:29:39,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 369 transitions, 4561 flow [2023-08-30 15:29:42,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 369 transitions, 4457 flow, removed 29 selfloop flow, removed 3 redundant places. [2023-08-30 15:29:42,272 INFO L231 Difference]: Finished difference. Result has 164 places, 207 transitions, 3191 flow [2023-08-30 15:29:42,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=1978, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3191, PETRI_PLACES=164, PETRI_TRANSITIONS=207} [2023-08-30 15:29:42,273 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 107 predicate places. [2023-08-30 15:29:42,273 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 207 transitions, 3191 flow [2023-08-30 15:29:42,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 139.5) internal successors, (3627), 26 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:42,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:29:42,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:29:42,280 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 15:29:42,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:29:42,474 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:29:42,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:29:42,475 INFO L85 PathProgramCache]: Analyzing trace with hash -618093243, now seen corresponding path program 1 times [2023-08-30 15:29:42,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:29:42,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025968046] [2023-08-30 15:29:42,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:29:42,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:29:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:29:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:29:42,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:29:42,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025968046] [2023-08-30 15:29:42,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025968046] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:29:42,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238170477] [2023-08-30 15:29:42,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:29:42,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:29:42,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:29:42,945 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 15:29:42,947 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 15:29:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:29:43,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 15:29:43,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:29:43,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:29:43,263 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 16 treesize of output 18 [2023-08-30 15:29:43,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:29:43,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 15:29:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:29:43,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:29:43,385 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_933 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_933) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483648))) is different from false [2023-08-30 15:29:43,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:29:43,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 80 [2023-08-30 15:29:43,441 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 15:29:43,446 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 15:29:43,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:29:43,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238170477] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:29:43,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:29:43,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2023-08-30 15:29:43,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523265740] [2023-08-30 15:29:43,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:29:43,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 15:29:43,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:29:43,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 15:29:43,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=383, Unknown=5, NotChecked=40, Total=506 [2023-08-30 15:29:43,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 470 [2023-08-30 15:29:43,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 207 transitions, 3191 flow. Second operand has 23 states, 23 states have (on average 145.69565217391303) internal successors, (3351), 23 states have internal predecessors, (3351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:43,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:29:43,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 470 [2023-08-30 15:29:43,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:29:52,164 WARN L222 SmtUtils]: Spent 8.21s on a formula simplification. DAG size of input: 65 DAG size of output: 55 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 15:29:57,957 INFO L130 PetriNetUnfolder]: 23773/36306 cut-off events. [2023-08-30 15:29:57,957 INFO L131 PetriNetUnfolder]: For 481328/481448 co-relation queries the response was YES. [2023-08-30 15:29:58,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256381 conditions, 36306 events. 23773/36306 cut-off events. For 481328/481448 co-relation queries the response was YES. Maximal size of possible extension queue 1996. Compared 270979 event pairs, 2556 based on Foata normal form. 508/30238 useless extension candidates. Maximal degree in co-relation 256316. Up to 15505 conditions per place. [2023-08-30 15:29:58,333 INFO L137 encePairwiseOnDemand]: 457/470 looper letters, 251 selfloop transitions, 120 changer transitions 0/373 dead transitions. [2023-08-30 15:29:58,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 373 transitions, 5525 flow [2023-08-30 15:29:58,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 15:29:58,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 15:29:58,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3074 transitions. [2023-08-30 15:29:58,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3270212765957447 [2023-08-30 15:29:58,336 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3074 transitions. [2023-08-30 15:29:58,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3074 transitions. [2023-08-30 15:29:58,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:29:58,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3074 transitions. [2023-08-30 15:29:58,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 153.7) internal successors, (3074), 20 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:58,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 470.0) internal successors, (9870), 21 states have internal predecessors, (9870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:58,344 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 470.0) internal successors, (9870), 21 states have internal predecessors, (9870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:58,344 INFO L175 Difference]: Start difference. First operand has 164 places, 207 transitions, 3191 flow. Second operand 20 states and 3074 transitions. [2023-08-30 15:29:58,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 373 transitions, 5525 flow [2023-08-30 15:30:01,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 373 transitions, 5427 flow, removed 41 selfloop flow, removed 4 redundant places. [2023-08-30 15:30:01,547 INFO L231 Difference]: Finished difference. Result has 185 places, 226 transitions, 3866 flow [2023-08-30 15:30:01,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=3057, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3866, PETRI_PLACES=185, PETRI_TRANSITIONS=226} [2023-08-30 15:30:01,548 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 128 predicate places. [2023-08-30 15:30:01,548 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 226 transitions, 3866 flow [2023-08-30 15:30:01,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 145.69565217391303) internal successors, (3351), 23 states have internal predecessors, (3351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:30:01,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:30:01,549 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:30:01,557 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 15:30:01,756 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,SelfDestructingSolverStorable23 [2023-08-30 15:30:01,757 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:30:01,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:30:01,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1995015138, now seen corresponding path program 1 times [2023-08-30 15:30:01,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:30:01,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318134372] [2023-08-30 15:30:01,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:30:01,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:30:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:30:02,917 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 15:30:02,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:30:02,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318134372] [2023-08-30 15:30:02,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318134372] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:30:02,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115358486] [2023-08-30 15:30:02,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:30:02,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:30:02,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:30:02,919 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 15:30:02,920 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 15:30:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:30:03,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 15:30:03,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:30:03,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:30:03,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 15:30:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 15:30:03,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:30:03,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:30:03,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2023-08-30 15:30:03,280 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 11 treesize of output 5 [2023-08-30 15:30:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 15:30:03,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115358486] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 15:30:03,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 15:30:03,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 6] total 20 [2023-08-30 15:30:03,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878124996] [2023-08-30 15:30:03,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:30:03,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:30:03,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:30:03,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:30:03,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=398, Unknown=3, NotChecked=0, Total=462 [2023-08-30 15:30:03,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 470 [2023-08-30 15:30:03,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 226 transitions, 3866 flow. Second operand has 7 states, 7 states have (on average 167.85714285714286) internal successors, (1175), 7 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 15:30:03,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:30:03,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 470 [2023-08-30 15:30:03,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:30:09,621 INFO L130 PetriNetUnfolder]: 25489/39158 cut-off events. [2023-08-30 15:30:09,621 INFO L131 PetriNetUnfolder]: For 723522/723642 co-relation queries the response was YES. [2023-08-30 15:30:09,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303769 conditions, 39158 events. 25489/39158 cut-off events. For 723522/723642 co-relation queries the response was YES. Maximal size of possible extension queue 1982. Compared 295428 event pairs, 4324 based on Foata normal form. 576/33374 useless extension candidates. Maximal degree in co-relation 303697. Up to 23133 conditions per place. [2023-08-30 15:30:10,092 INFO L137 encePairwiseOnDemand]: 460/470 looper letters, 195 selfloop transitions, 83 changer transitions 0/280 dead transitions. [2023-08-30 15:30:10,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 280 transitions, 5067 flow [2023-08-30 15:30:10,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:30:10,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:30:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1237 transitions. [2023-08-30 15:30:10,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3759878419452888 [2023-08-30 15:30:10,094 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1237 transitions. [2023-08-30 15:30:10,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1237 transitions. [2023-08-30 15:30:10,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:30:10,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1237 transitions. [2023-08-30 15:30:10,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 176.71428571428572) internal successors, (1237), 7 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:30:10,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:30:10,097 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:30:10,097 INFO L175 Difference]: Start difference. First operand has 185 places, 226 transitions, 3866 flow. Second operand 7 states and 1237 transitions. [2023-08-30 15:30:10,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 280 transitions, 5067 flow [2023-08-30 15:30:16,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 280 transitions, 4911 flow, removed 41 selfloop flow, removed 9 redundant places. [2023-08-30 15:30:16,466 INFO L231 Difference]: Finished difference. Result has 185 places, 230 transitions, 4103 flow [2023-08-30 15:30:16,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=3681, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4103, PETRI_PLACES=185, PETRI_TRANSITIONS=230} [2023-08-30 15:30:16,467 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 128 predicate places. [2023-08-30 15:30:16,467 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 230 transitions, 4103 flow [2023-08-30 15:30:16,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 167.85714285714286) internal successors, (1175), 7 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 15:30:16,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:30:16,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:30:16,472 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 15:30:16,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:30:16,668 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:30:16,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:30:16,669 INFO L85 PathProgramCache]: Analyzing trace with hash -365187866, now seen corresponding path program 2 times [2023-08-30 15:30:16,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:30:16,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177989019] [2023-08-30 15:30:16,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:30:16,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:30:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:30:17,356 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 15:30:17,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:30:17,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177989019] [2023-08-30 15:30:17,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177989019] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:30:17,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878540459] [2023-08-30 15:30:17,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:30:17,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:30:17,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:30:17,357 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 15:30:17,359 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 15:30:17,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:30:17,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:30:17,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 15:30:17,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:30:17,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:30:17,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 15:30:17,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:30:17,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 15:30:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 15:30:17,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:30:17,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878540459] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:30:17,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:30:17,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 15 [2023-08-30 15:30:17,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366514304] [2023-08-30 15:30:17,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:30:17,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 15:30:17,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:30:17,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 15:30:17,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-08-30 15:30:17,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 470 [2023-08-30 15:30:17,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 230 transitions, 4103 flow. Second operand has 8 states, 8 states have (on average 179.625) internal successors, (1437), 8 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:30:17,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:30:17,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 470 [2023-08-30 15:30:17,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:30:23,950 INFO L130 PetriNetUnfolder]: 25457/39542 cut-off events. [2023-08-30 15:30:23,950 INFO L131 PetriNetUnfolder]: For 754876/754996 co-relation queries the response was YES. [2023-08-30 15:30:24,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295326 conditions, 39542 events. 25457/39542 cut-off events. For 754876/754996 co-relation queries the response was YES. Maximal size of possible extension queue 2033. Compared 301214 event pairs, 5892 based on Foata normal form. 1200/33530 useless extension candidates. Maximal degree in co-relation 295251. Up to 24001 conditions per place. [2023-08-30 15:30:24,480 INFO L137 encePairwiseOnDemand]: 462/470 looper letters, 219 selfloop transitions, 59 changer transitions 0/280 dead transitions. [2023-08-30 15:30:24,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 280 transitions, 5305 flow [2023-08-30 15:30:24,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 15:30:24,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 15:30:24,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1143 transitions. [2023-08-30 15:30:24,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053191489361702 [2023-08-30 15:30:24,481 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1143 transitions. [2023-08-30 15:30:24,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1143 transitions. [2023-08-30 15:30:24,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:30:24,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1143 transitions. [2023-08-30 15:30:24,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 190.5) internal successors, (1143), 6 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:30:24,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:30:24,486 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:30:24,486 INFO L175 Difference]: Start difference. First operand has 185 places, 230 transitions, 4103 flow. Second operand 6 states and 1143 transitions. [2023-08-30 15:30:24,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 280 transitions, 5305 flow [2023-08-30 15:30:31,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 280 transitions, 5094 flow, removed 13 selfloop flow, removed 6 redundant places. [2023-08-30 15:30:31,433 INFO L231 Difference]: Finished difference. Result has 186 places, 235 transitions, 4252 flow [2023-08-30 15:30:31,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=3842, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4252, PETRI_PLACES=186, PETRI_TRANSITIONS=235} [2023-08-30 15:30:31,433 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 129 predicate places. [2023-08-30 15:30:31,433 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 235 transitions, 4252 flow [2023-08-30 15:30:31,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 179.625) internal successors, (1437), 8 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:30:31,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:30:31,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:30:31,439 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 15:30:31,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:30:31,641 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:30:31,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:30:31,642 INFO L85 PathProgramCache]: Analyzing trace with hash -618093057, now seen corresponding path program 1 times [2023-08-30 15:30:31,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:30:31,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407289612] [2023-08-30 15:30:31,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:30:31,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:30:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:30:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:30:32,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:30:32,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407289612] [2023-08-30 15:30:32,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407289612] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:30:32,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584739322] [2023-08-30 15:30:32,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:30:32,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:30:32,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:30:32,072 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 15:30:32,092 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 15:30:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:30:32,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 15:30:32,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:30:32,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:30:32,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:30:32,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:30:32,277 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 15:30:32,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 15:30:32,324 INFO L350 Elim1Store]: Elim1 eliminated variable 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 15:30:32,416 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 15:30:32,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 15:30:32,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 15:30:32,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:30:32,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 15:30:32,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:30:32,670 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 18 treesize of output 20 [2023-08-30 15:30:32,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:30:32,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 15:30:32,785 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 15:30:32,785 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 23 treesize of output 10 [2023-08-30 15:30:32,805 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 15:30:32,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:30:33,211 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:30:33,211 INFO L350 Elim1Store]: Elim1 eliminated variable 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 37 treesize of output 38 [2023-08-30 15:30:33,223 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:30:33,224 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 677 treesize of output 661 [2023-08-30 15:30:33,247 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 320 treesize of output 272 [2023-08-30 15:30:33,258 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 133 treesize of output 127 [2023-08-30 15:30:33,267 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 266 treesize of output 242 [2023-08-30 15:30:33,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 114 [2023-08-30 15:30:33,665 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 15:30:33,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584739322] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:30:33,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:30:33,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2023-08-30 15:30:33,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409126658] [2023-08-30 15:30:33,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:30:33,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 15:30:33,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:30:33,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 15:30:33,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=600, Unknown=10, NotChecked=0, Total=702 [2023-08-30 15:30:36,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:30:37,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 470 [2023-08-30 15:30:37,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 235 transitions, 4252 flow. Second operand has 27 states, 27 states have (on average 137.44444444444446) internal successors, (3711), 27 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 15:30:37,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:30:37,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 470 [2023-08-30 15:30:37,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:30:46,353 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (and (forall ((v_ArrVal_1106 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1106) c_~q1~0.base) .cse0)) 2147483648)) (or (<= c_~n1~0 c_~q1_back~0) (< c_~q1_back~0 0) (forall ((v_ArrVal_1106 (Array Int Int)) (v_ArrVal_1105 (Array Int Int))) (< (+ c_~s~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1105) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1106) c_~q1~0.base) .cse0)) 2147483648))))) is different from false [2023-08-30 15:30:49,153 WARN L539 Checker$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 15:30:51,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:31:26,426 WARN L222 SmtUtils]: Spent 32.31s on a formula simplification. DAG size of input: 80 DAG size of output: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 15:31:28,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:31:30,866 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 15:31:36,698 INFO L130 PetriNetUnfolder]: 26164/40636 cut-off events. [2023-08-30 15:31:36,698 INFO L131 PetriNetUnfolder]: For 725382/725502 co-relation queries the response was YES. [2023-08-30 15:31:37,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311259 conditions, 40636 events. 26164/40636 cut-off events. For 725382/725502 co-relation queries the response was YES. Maximal size of possible extension queue 1958. Compared 314983 event pairs, 10402 based on Foata normal form. 145/33629 useless extension candidates. Maximal degree in co-relation 311184. Up to 29307 conditions per place. [2023-08-30 15:31:37,367 INFO L137 encePairwiseOnDemand]: 456/470 looper letters, 340 selfloop transitions, 107 changer transitions 1/450 dead transitions. [2023-08-30 15:31:37,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 450 transitions, 7910 flow [2023-08-30 15:31:37,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 15:31:37,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 15:31:37,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3299 transitions. [2023-08-30 15:31:37,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3051803885291397 [2023-08-30 15:31:37,372 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3299 transitions. [2023-08-30 15:31:37,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3299 transitions. [2023-08-30 15:31:37,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:31:37,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3299 transitions. [2023-08-30 15:31:37,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 143.43478260869566) internal successors, (3299), 23 states have internal predecessors, (3299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:31:37,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 470.0) internal successors, (11280), 24 states have internal predecessors, (11280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:31:37,384 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 470.0) internal successors, (11280), 24 states have internal predecessors, (11280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:31:37,384 INFO L175 Difference]: Start difference. First operand has 186 places, 235 transitions, 4252 flow. Second operand 23 states and 3299 transitions. [2023-08-30 15:31:37,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 450 transitions, 7910 flow [2023-08-30 15:31:43,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 450 transitions, 7865 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 15:31:43,080 INFO L231 Difference]: Finished difference. Result has 215 places, 304 transitions, 6284 flow [2023-08-30 15:31:43,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=4198, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=6284, PETRI_PLACES=215, PETRI_TRANSITIONS=304} [2023-08-30 15:31:43,080 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 158 predicate places. [2023-08-30 15:31:43,080 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 304 transitions, 6284 flow [2023-08-30 15:31:43,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 137.44444444444446) internal successors, (3711), 27 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 15:31:43,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:31:43,081 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:31:43,085 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 15:31:43,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:31:43,281 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:31:43,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:31:43,282 INFO L85 PathProgramCache]: Analyzing trace with hash 592919062, now seen corresponding path program 1 times [2023-08-30 15:31:43,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:31:43,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338222189] [2023-08-30 15:31:43,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:31:43,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:31:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:31:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 15:31:43,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:31:43,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338222189] [2023-08-30 15:31:43,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338222189] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:31:43,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754099631] [2023-08-30 15:31:43,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:31:43,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:31:43,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:31:43,364 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 15:31:43,401 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 15:31:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:31:43,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 15:31:43,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:31:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:31:43,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:31:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:31:43,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754099631] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:31:43,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:31:43,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2023-08-30 15:31:43,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260381718] [2023-08-30 15:31:43,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:31:43,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 15:31:43,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:31:43,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 15:31:43,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-08-30 15:31:43,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 470 [2023-08-30 15:31:43,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 304 transitions, 6284 flow. Second operand has 12 states, 12 states have (on average 182.66666666666666) internal successors, (2192), 12 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:31:43,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:31:43,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 470 [2023-08-30 15:31:43,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:31:53,528 INFO L130 PetriNetUnfolder]: 34116/52331 cut-off events. [2023-08-30 15:31:53,528 INFO L131 PetriNetUnfolder]: For 1050295/1050546 co-relation queries the response was YES. [2023-08-30 15:31:54,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 396086 conditions, 52331 events. 34116/52331 cut-off events. For 1050295/1050546 co-relation queries the response was YES. Maximal size of possible extension queue 2214. Compared 405117 event pairs, 11863 based on Foata normal form. 1841/43321 useless extension candidates. Maximal degree in co-relation 396001. Up to 23458 conditions per place. [2023-08-30 15:31:54,800 INFO L137 encePairwiseOnDemand]: 457/470 looper letters, 436 selfloop transitions, 253 changer transitions 0/696 dead transitions. [2023-08-30 15:31:54,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 696 transitions, 15143 flow [2023-08-30 15:31:54,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 15:31:54,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 15:31:54,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2903 transitions. [2023-08-30 15:31:54,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4117730496453901 [2023-08-30 15:31:54,812 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2903 transitions. [2023-08-30 15:31:54,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2903 transitions. [2023-08-30 15:31:54,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:31:54,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2903 transitions. [2023-08-30 15:31:54,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 193.53333333333333) internal successors, (2903), 15 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:31:54,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 470.0) internal successors, (7520), 16 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:31:54,822 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 470.0) internal successors, (7520), 16 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:31:54,822 INFO L175 Difference]: Start difference. First operand has 215 places, 304 transitions, 6284 flow. Second operand 15 states and 2903 transitions. [2023-08-30 15:31:54,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 696 transitions, 15143 flow [2023-08-30 15:32:02,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 696 transitions, 14845 flow, removed 72 selfloop flow, removed 14 redundant places. [2023-08-30 15:32:02,125 INFO L231 Difference]: Finished difference. Result has 224 places, 464 transitions, 11274 flow [2023-08-30 15:32:02,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=5866, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=11274, PETRI_PLACES=224, PETRI_TRANSITIONS=464} [2023-08-30 15:32:02,126 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 167 predicate places. [2023-08-30 15:32:02,126 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 464 transitions, 11274 flow [2023-08-30 15:32:02,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 182.66666666666666) internal successors, (2192), 12 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:32:02,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:32:02,127 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:32:02,134 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 15:32:02,331 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,SelfDestructingSolverStorable27 [2023-08-30 15:32:02,332 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:32:02,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:32:02,332 INFO L85 PathProgramCache]: Analyzing trace with hash 475891200, now seen corresponding path program 1 times [2023-08-30 15:32:02,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:32:02,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062501088] [2023-08-30 15:32:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:32:02,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:32:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:32:02,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:32:02,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:32:02,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062501088] [2023-08-30 15:32:02,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062501088] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:32:02,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591790778] [2023-08-30 15:32:02,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:32:02,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:32:02,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:32:02,772 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 15:32:02,774 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 15:32:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:32:02,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 15:32:02,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:32:02,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:32:02,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 15:32:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 15:32:03,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:32:03,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:32:03,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-08-30 15:32:03,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-08-30 15:32:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 15:32:03,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591790778] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 15:32:03,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 15:32:03,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 18 [2023-08-30 15:32:03,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443151814] [2023-08-30 15:32:03,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:32:03,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:32:03,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:32:03,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:32:03,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=321, Unknown=2, NotChecked=0, Total=380 [2023-08-30 15:32:03,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 470 [2023-08-30 15:32:03,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 464 transitions, 11274 flow. Second operand has 7 states, 7 states have (on average 169.85714285714286) internal successors, (1189), 7 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:32:03,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:32:03,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 470 [2023-08-30 15:32:03,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:32:14,003 INFO L130 PetriNetUnfolder]: 34502/52669 cut-off events. [2023-08-30 15:32:14,003 INFO L131 PetriNetUnfolder]: For 1262015/1262135 co-relation queries the response was YES. [2023-08-30 15:32:14,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447242 conditions, 52669 events. 34502/52669 cut-off events. For 1262015/1262135 co-relation queries the response was YES. Maximal size of possible extension queue 2106. Compared 403802 event pairs, 6241 based on Foata normal form. 165/42046 useless extension candidates. Maximal degree in co-relation 447150. Up to 32317 conditions per place. [2023-08-30 15:32:14,762 INFO L137 encePairwiseOnDemand]: 459/470 looper letters, 330 selfloop transitions, 187 changer transitions 0/519 dead transitions. [2023-08-30 15:32:14,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 519 transitions, 13068 flow [2023-08-30 15:32:14,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 15:32:14,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 15:32:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1075 transitions. [2023-08-30 15:32:14,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38120567375886527 [2023-08-30 15:32:14,764 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1075 transitions. [2023-08-30 15:32:14,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1075 transitions. [2023-08-30 15:32:14,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:32:14,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1075 transitions. [2023-08-30 15:32:14,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:32:14,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:32:14,767 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:32:14,768 INFO L175 Difference]: Start difference. First operand has 224 places, 464 transitions, 11274 flow. Second operand 6 states and 1075 transitions. [2023-08-30 15:32:14,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 519 transitions, 13068 flow [2023-08-30 15:32:25,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 519 transitions, 12714 flow, removed 168 selfloop flow, removed 4 redundant places. [2023-08-30 15:32:25,702 INFO L231 Difference]: Finished difference. Result has 227 places, 465 transitions, 11652 flow [2023-08-30 15:32:25,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=11002, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11652, PETRI_PLACES=227, PETRI_TRANSITIONS=465} [2023-08-30 15:32:25,703 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 170 predicate places. [2023-08-30 15:32:25,703 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 465 transitions, 11652 flow [2023-08-30 15:32:25,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 169.85714285714286) internal successors, (1189), 7 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:32:25,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:32:25,704 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:32:25,709 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 15:32:25,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 15:32:25,905 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:32:25,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:32:25,906 INFO L85 PathProgramCache]: Analyzing trace with hash 573891224, now seen corresponding path program 2 times [2023-08-30 15:32:25,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:32:25,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132980404] [2023-08-30 15:32:25,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:32:25,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:32:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:32:26,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:32:26,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:32:26,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132980404] [2023-08-30 15:32:26,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132980404] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:32:26,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055565881] [2023-08-30 15:32:26,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:32:26,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:32:26,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:32:26,497 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 15:32:26,501 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 15:32:26,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:32:26,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:32:26,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 15:32:26,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:32:26,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:32:26,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 15:32:26,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:32:26,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 15:32:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 15:32:26,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:32:26,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055565881] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:32:26,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:32:26,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2023-08-30 15:32:26,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899137067] [2023-08-30 15:32:26,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:32:26,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 15:32:26,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:32:26,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 15:32:26,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-08-30 15:32:26,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 470 [2023-08-30 15:32:26,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 465 transitions, 11652 flow. Second operand has 8 states, 8 states have (on average 180.625) internal successors, (1445), 8 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:32:26,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:32:26,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 470 [2023-08-30 15:32:26,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:32:37,438 INFO L130 PetriNetUnfolder]: 34130/52166 cut-off events. [2023-08-30 15:32:37,438 INFO L131 PetriNetUnfolder]: For 1435647/1435767 co-relation queries the response was YES. [2023-08-30 15:32:37,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450025 conditions, 52166 events. 34130/52166 cut-off events. For 1435647/1435767 co-relation queries the response was YES. Maximal size of possible extension queue 2065. Compared 401475 event pairs, 9969 based on Foata normal form. 387/41864 useless extension candidates. Maximal degree in co-relation 449930. Up to 34234 conditions per place. [2023-08-30 15:32:38,416 INFO L137 encePairwiseOnDemand]: 461/470 looper letters, 406 selfloop transitions, 94 changer transitions 0/502 dead transitions. [2023-08-30 15:32:38,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 502 transitions, 12876 flow [2023-08-30 15:32:38,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 15:32:38,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 15:32:38,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1140 transitions. [2023-08-30 15:32:38,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40425531914893614 [2023-08-30 15:32:38,418 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1140 transitions. [2023-08-30 15:32:38,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1140 transitions. [2023-08-30 15:32:38,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:32:38,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1140 transitions. [2023-08-30 15:32:38,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 190.0) internal successors, (1140), 6 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:32:38,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:32:38,421 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:32:38,421 INFO L175 Difference]: Start difference. First operand has 227 places, 465 transitions, 11652 flow. Second operand 6 states and 1140 transitions. [2023-08-30 15:32:38,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 502 transitions, 12876 flow [2023-08-30 15:32:50,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 502 transitions, 12090 flow, removed 16 selfloop flow, removed 9 redundant places. [2023-08-30 15:32:50,862 INFO L231 Difference]: Finished difference. Result has 225 places, 455 transitions, 10878 flow [2023-08-30 15:32:50,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=10109, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10878, PETRI_PLACES=225, PETRI_TRANSITIONS=455} [2023-08-30 15:32:50,863 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 168 predicate places. [2023-08-30 15:32:50,863 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 455 transitions, 10878 flow [2023-08-30 15:32:50,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 180.625) internal successors, (1445), 8 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:32:50,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:32:50,863 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:32:50,868 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 15:32:51,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:32:51,064 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:32:51,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:32:51,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1129295809, now seen corresponding path program 2 times [2023-08-30 15:32:51,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:32:51,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397469748] [2023-08-30 15:32:51,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:32:51,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:32:51,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:32:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:32:52,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:32:52,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397469748] [2023-08-30 15:32:52,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397469748] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:32:52,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037747637] [2023-08-30 15:32:52,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:32:52,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:32:52,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:32:52,397 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 15:32:52,402 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 15:32:52,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:32:52,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:32:52,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 15:32:52,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:32:52,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:32:52,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 15:32:52,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:32:52,746 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 18 treesize of output 20 [2023-08-30 15:32:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 15:32:52,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:32:52,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037747637] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:32:52,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:32:52,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 17 [2023-08-30 15:32:52,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843050866] [2023-08-30 15:32:52,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:32:52,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 15:32:52,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:32:52,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 15:32:52,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2023-08-30 15:32:52,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 470 [2023-08-30 15:32:52,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 455 transitions, 10878 flow. Second operand has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:32:52,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:32:52,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 470 [2023-08-30 15:32:52,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:33:03,043 INFO L130 PetriNetUnfolder]: 33982/51934 cut-off events. [2023-08-30 15:33:03,043 INFO L131 PetriNetUnfolder]: For 1291173/1291293 co-relation queries the response was YES. [2023-08-30 15:33:03,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438772 conditions, 51934 events. 33982/51934 cut-off events. For 1291173/1291293 co-relation queries the response was YES. Maximal size of possible extension queue 2045. Compared 398281 event pairs, 13912 based on Foata normal form. 160/41501 useless extension candidates. Maximal degree in co-relation 438679. Up to 47113 conditions per place. [2023-08-30 15:33:03,793 INFO L137 encePairwiseOnDemand]: 464/470 looper letters, 416 selfloop transitions, 62 changer transitions 0/480 dead transitions. [2023-08-30 15:33:03,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 480 transitions, 11927 flow [2023-08-30 15:33:03,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 15:33:03,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 15:33:03,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1131 transitions. [2023-08-30 15:33:03,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40106382978723404 [2023-08-30 15:33:03,795 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1131 transitions. [2023-08-30 15:33:03,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1131 transitions. [2023-08-30 15:33:03,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:33:03,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1131 transitions. [2023-08-30 15:33:03,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 188.5) internal successors, (1131), 6 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:33:03,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:33:03,798 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:33:03,798 INFO L175 Difference]: Start difference. First operand has 225 places, 455 transitions, 10878 flow. Second operand 6 states and 1131 transitions. [2023-08-30 15:33:03,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 480 transitions, 11927 flow [2023-08-30 15:33:18,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 480 transitions, 11782 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-08-30 15:33:18,953 INFO L231 Difference]: Finished difference. Result has 227 places, 451 transitions, 10729 flow [2023-08-30 15:33:18,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=10605, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10729, PETRI_PLACES=227, PETRI_TRANSITIONS=451} [2023-08-30 15:33:18,953 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 170 predicate places. [2023-08-30 15:33:18,953 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 451 transitions, 10729 flow [2023-08-30 15:33:18,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:33:18,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:33:18,954 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:33:18,958 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 15:33:19,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:33:19,154 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 15:33:19,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:33:19,155 INFO L85 PathProgramCache]: Analyzing trace with hash 2064274532, now seen corresponding path program 1 times [2023-08-30 15:33:19,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:33:19,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873577002] [2023-08-30 15:33:19,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:33:19,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:33:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:33:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:33:19,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:33:19,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873577002] [2023-08-30 15:33:19,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873577002] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:33:19,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845404787] [2023-08-30 15:33:19,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:33:19,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:33:19,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:33:19,645 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 15:33:19,647 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 15:33:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:33:19,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 15:33:19,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:33:19,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:33:19,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 15:33:20,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:33:20,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 15:33:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:33:20,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:33:20,120 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1389 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1389) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483648))) is different from false [2023-08-30 15:33:20,190 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:33:20,191 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 174 treesize of output 158 [2023-08-30 15:33:20,195 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 31 treesize of output 25 [2023-08-30 15:33:20,209 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 15:33:20,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:33:20,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845404787] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:33:20,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:33:20,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-08-30 15:33:20,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128418419] [2023-08-30 15:33:20,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:33:20,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 15:33:20,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:33:20,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 15:33:20,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=583, Unknown=2, NotChecked=50, Total=756 [2023-08-30 15:33:20,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 470 [2023-08-30 15:33:20,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 451 transitions, 10729 flow. Second operand has 28 states, 28 states have (on average 145.60714285714286) internal successors, (4077), 28 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:33:20,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:33:20,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 470 [2023-08-30 15:33:20,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand