./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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-queue-add-2.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 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 08:27:47,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 08:27:47,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 08:27:47,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 08:27:47,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 08:27:47,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 08:27:47,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 08:27:47,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 08:27:47,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 08:27:47,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 08:27:47,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 08:27:47,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 08:27:47,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 08:27:47,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 08:27:47,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 08:27:47,268 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 08:27:47,269 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 08:27:47,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 08:27:47,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 08:27:47,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 08:27:47,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 08:27:47,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 08:27:47,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 08:27:47,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 08:27:47,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 08:27:47,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 08:27:47,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 08:27:47,289 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 08:27:47,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 08:27:47,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 08:27:47,293 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 08:27:47,294 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 08:27:47,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 08:27:47,295 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 08:27:47,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 08:27:47,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 08:27:47,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 08:27:47,297 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 08:27:47,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 08:27:47,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 08:27:47,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 08:27:47,299 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 08:27:47,321 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 08:27:47,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 08:27:47,322 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 08:27:47,322 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 08:27:47,323 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 08:27:47,323 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 08:27:47,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 08:27:47,324 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 08:27:47,324 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 08:27:47,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 08:27:47,325 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 08:27:47,325 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 08:27:47,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 08:27:47,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 08:27:47,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 08:27:47,326 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 08:27:47,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 08:27:47,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 08:27:47,326 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 08:27:47,326 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 08:27:47,327 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 08:27:47,327 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 08:27:47,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 08:27:47,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 08:27:47,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 08:27:47,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 08:27:47,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:27:47,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 08:27:47,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 08:27:47,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 08:27:47,328 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 08:27:47,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 08:27:47,329 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 08:27:47,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 08:27:47,329 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 08:27:47,329 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 08:27:47,329 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 08:27:47,330 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 08:27:47,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 08:27:47,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 08:27:47,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 08:27:47,629 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 08:27:47,629 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 08:27:47,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-09-01 08:27:48,601 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 08:27:48,764 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 08:27:48,764 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-09-01 08:27:48,769 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/040be9e1e/0fc0d9511708424bbd37abaedd68b1d7/FLAGf3363b03b [2023-09-01 08:27:48,778 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/040be9e1e/0fc0d9511708424bbd37abaedd68b1d7 [2023-09-01 08:27:48,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 08:27:48,782 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 08:27:48,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 08:27:48,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 08:27:48,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 08:27:48,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:27:48" (1/1) ... [2023-09-01 08:27:48,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bc8f9e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:27:48, skipping insertion in model container [2023-09-01 08:27:48,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:27:48" (1/1) ... [2023-09-01 08:27:48,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 08:27:48,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 08:27:48,975 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-queue-add-2.wvr.c[2696,2709] [2023-09-01 08:27:48,984 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:27:48,993 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 08:27:49,022 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-queue-add-2.wvr.c[2696,2709] [2023-09-01 08:27:49,032 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:27:49,037 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:27:49,038 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:27:49,043 INFO L208 MainTranslator]: Completed translation [2023-09-01 08:27:49,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:27:49 WrapperNode [2023-09-01 08:27:49,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 08:27:49,045 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 08:27:49,045 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 08:27:49,045 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 08:27:49,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:27:49" (1/1) ... [2023-09-01 08:27:49,065 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:27:49" (1/1) ... [2023-09-01 08:27:49,090 INFO L138 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 170 [2023-09-01 08:27:49,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 08:27:49,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 08:27:49,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 08:27:49,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 08:27:49,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:27:49" (1/1) ... [2023-09-01 08:27:49,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:27:49" (1/1) ... [2023-09-01 08:27:49,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:27:49" (1/1) ... [2023-09-01 08:27:49,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:27:49" (1/1) ... [2023-09-01 08:27:49,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:27:49" (1/1) ... [2023-09-01 08:27:49,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:27:49" (1/1) ... [2023-09-01 08:27:49,145 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:27:49" (1/1) ... [2023-09-01 08:27:49,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:27:49" (1/1) ... [2023-09-01 08:27:49,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 08:27:49,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 08:27:49,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 08:27:49,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 08:27:49,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:27:49" (1/1) ... [2023-09-01 08:27:49,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:27:49,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:27:49,211 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) [2023-09-01 08:27:49,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 08:27:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 08:27:49,255 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 08:27:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 08:27:49,255 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 08:27:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 08:27:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 08:27:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 08:27:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 08:27:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 08:27:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 08:27:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 08:27:49,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 08:27:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 08:27:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 08:27:49,245 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 [2023-09-01 08:27:49,257 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 08:27:49,361 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 08:27:49,362 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 08:27:49,597 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 08:27:49,740 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 08:27:49,741 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 08:27:49,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:27:49 BoogieIcfgContainer [2023-09-01 08:27:49,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 08:27:49,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 08:27:49,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 08:27:49,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 08:27:49,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 08:27:48" (1/3) ... [2023-09-01 08:27:49,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ee6e18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:27:49, skipping insertion in model container [2023-09-01 08:27:49,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:27:49" (2/3) ... [2023-09-01 08:27:49,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ee6e18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:27:49, skipping insertion in model container [2023-09-01 08:27:49,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:27:49" (3/3) ... [2023-09-01 08:27:49,748 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2023-09-01 08:27:49,753 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 08:27:49,758 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 08:27:49,759 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-09-01 08:27:49,759 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 08:27:49,825 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 08:27:49,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 144 transitions, 304 flow [2023-09-01 08:27:49,917 INFO L130 PetriNetUnfolder]: 11/142 cut-off events. [2023-09-01 08:27:49,917 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 08:27:49,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 142 events. 11/142 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 142 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 105. Up to 3 conditions per place. [2023-09-01 08:27:49,921 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 144 transitions, 304 flow [2023-09-01 08:27:49,926 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 126 transitions, 261 flow [2023-09-01 08:27:49,928 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 08:27:49,933 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 123 places, 126 transitions, 261 flow [2023-09-01 08:27:49,935 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 123 places, 126 transitions, 261 flow [2023-09-01 08:27:49,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 126 transitions, 261 flow [2023-09-01 08:27:49,954 INFO L130 PetriNetUnfolder]: 10/126 cut-off events. [2023-09-01 08:27:49,954 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 08:27:49,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 126 events. 10/126 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 142 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 105. Up to 3 conditions per place. [2023-09-01 08:27:49,956 INFO L119 LiptonReduction]: Number of co-enabled transitions 1142 [2023-09-01 08:27:54,070 INFO L134 LiptonReduction]: Checked pairs total: 1426 [2023-09-01 08:27:54,071 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-09-01 08:27:54,081 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 08:27:54,090 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;@7255a323, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 08:27:54,090 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2023-09-01 08:27:54,094 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 08:27:54,094 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 08:27:54,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:27:54,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 08:27:54,096 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:27:54,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:27:54,100 INFO L85 PathProgramCache]: Analyzing trace with hash 21333, now seen corresponding path program 1 times [2023-09-01 08:27:54,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:27:54,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729715587] [2023-09-01 08:27:54,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:27:54,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:27:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:27:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:27:54,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:27:54,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729715587] [2023-09-01 08:27:54,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729715587] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:27:54,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:27:54,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:27:54,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333309446] [2023-09-01 08:27:54,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:27:54,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:27:54,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:27:54,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:27:54,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:27:54,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 277 [2023-09-01 08:27:54,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:54,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:27:54,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 277 [2023-09-01 08:27:54,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:27:54,517 INFO L130 PetriNetUnfolder]: 480/706 cut-off events. [2023-09-01 08:27:54,518 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-09-01 08:27:54,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1445 conditions, 706 events. 480/706 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 3190 event pairs, 219 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 651. Up to 350 conditions per place. [2023-09-01 08:27:54,522 INFO L137 encePairwiseOnDemand]: 270/277 looper letters, 39 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-09-01 08:27:54,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 43 transitions, 186 flow [2023-09-01 08:27:54,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:27:54,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:27:54,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 406 transitions. [2023-09-01 08:27:54,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48856799037304455 [2023-09-01 08:27:54,532 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 406 transitions. [2023-09-01 08:27:54,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 406 transitions. [2023-09-01 08:27:54,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:27:54,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 406 transitions. [2023-09-01 08:27:54,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:54,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:54,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:54,541 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 63 flow. Second operand 3 states and 406 transitions. [2023-09-01 08:27:54,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 43 transitions, 186 flow [2023-09-01 08:27:54,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 43 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 08:27:54,545 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 66 flow [2023-09-01 08:27:54,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-09-01 08:27:54,548 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2023-09-01 08:27:54,549 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 66 flow [2023-09-01 08:27:54,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:54,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:27:54,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 08:27:54,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 08:27:54,550 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:27:54,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:27:54,550 INFO L85 PathProgramCache]: Analyzing trace with hash 661979, now seen corresponding path program 1 times [2023-09-01 08:27:54,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:27:54,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043403841] [2023-09-01 08:27:54,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:27:54,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:27:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:27:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:27:54,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:27:54,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043403841] [2023-09-01 08:27:54,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043403841] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:27:54,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203035977] [2023-09-01 08:27:54,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:27:54,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:27:54,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:27:54,627 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) [2023-09-01 08:27:54,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 08:27:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:27:54,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:27:54,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:27:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:27:54,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:27:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:27:54,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203035977] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:27:54,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:27:54,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-09-01 08:27:54,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106745113] [2023-09-01 08:27:54,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:27:54,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:27:54,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:27:54,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:27:54,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 08:27:54,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 277 [2023-09-01 08:27:54,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 120.14285714285714) internal successors, (841), 7 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:54,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:27:54,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 277 [2023-09-01 08:27:54,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:27:55,056 INFO L130 PetriNetUnfolder]: 1185/1747 cut-off events. [2023-09-01 08:27:55,056 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-09-01 08:27:55,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3546 conditions, 1747 events. 1185/1747 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 9162 event pairs, 546 based on Foata normal form. 0/601 useless extension candidates. Maximal degree in co-relation 2815. Up to 350 conditions per place. [2023-09-01 08:27:55,063 INFO L137 encePairwiseOnDemand]: 273/277 looper letters, 92 selfloop transitions, 9 changer transitions 0/103 dead transitions. [2023-09-01 08:27:55,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 103 transitions, 452 flow [2023-09-01 08:27:55,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 08:27:55,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 08:27:55,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 937 transitions. [2023-09-01 08:27:55,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48323878287777206 [2023-09-01 08:27:55,067 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 937 transitions. [2023-09-01 08:27:55,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 937 transitions. [2023-09-01 08:27:55,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:27:55,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 937 transitions. [2023-09-01 08:27:55,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 133.85714285714286) internal successors, (937), 7 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:55,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:55,073 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:55,073 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 66 flow. Second operand 7 states and 937 transitions. [2023-09-01 08:27:55,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 103 transitions, 452 flow [2023-09-01 08:27:55,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 103 transitions, 450 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:27:55,075 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 123 flow [2023-09-01 08:27:55,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=123, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-09-01 08:27:55,076 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2023-09-01 08:27:55,076 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 123 flow [2023-09-01 08:27:55,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.14285714285714) internal successors, (841), 7 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:55,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:27:55,076 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-09-01 08:27:55,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 08:27:55,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:27:55,284 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:27:55,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:27:55,284 INFO L85 PathProgramCache]: Analyzing trace with hash 20522004, now seen corresponding path program 1 times [2023-09-01 08:27:55,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:27:55,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519298560] [2023-09-01 08:27:55,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:27:55,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:27:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:27:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:27:55,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:27:55,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519298560] [2023-09-01 08:27:55,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519298560] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:27:55,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169752335] [2023-09-01 08:27:55,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:27:55,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:27:55,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:27:55,379 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) [2023-09-01 08:27:55,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 08:27:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:27:55,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 08:27:55,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:27:55,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:27:55,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:27:55,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169752335] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:27:55,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:27:55,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-09-01 08:27:55,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212792103] [2023-09-01 08:27:55,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:27:55,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 08:27:55,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:27:55,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 08:27:55,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 08:27:55,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 277 [2023-09-01 08:27:55,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:55,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:27:55,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 277 [2023-09-01 08:27:55,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:27:55,667 INFO L130 PetriNetUnfolder]: 1182/1743 cut-off events. [2023-09-01 08:27:55,667 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 08:27:55,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3548 conditions, 1743 events. 1182/1743 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 9183 event pairs, 546 based on Foata normal form. 2/604 useless extension candidates. Maximal degree in co-relation 2127. Up to 1016 conditions per place. [2023-09-01 08:27:55,677 INFO L137 encePairwiseOnDemand]: 274/277 looper letters, 58 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2023-09-01 08:27:55,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 63 transitions, 298 flow [2023-09-01 08:27:55,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 08:27:55,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 08:27:55,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 656 transitions. [2023-09-01 08:27:55,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4736462093862816 [2023-09-01 08:27:55,681 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 656 transitions. [2023-09-01 08:27:55,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 656 transitions. [2023-09-01 08:27:55,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:27:55,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 656 transitions. [2023-09-01 08:27:55,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.2) internal successors, (656), 5 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:55,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:55,687 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:55,687 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 123 flow. Second operand 5 states and 656 transitions. [2023-09-01 08:27:55,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 63 transitions, 298 flow [2023-09-01 08:27:55,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 63 transitions, 290 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 08:27:55,691 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 94 flow [2023-09-01 08:27:55,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2023-09-01 08:27:55,692 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-09-01 08:27:55,694 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 94 flow [2023-09-01 08:27:55,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:55,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:27:55,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 08:27:55,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 08:27:55,905 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,SelfDestructingSolverStorable2 [2023-09-01 08:27:55,905 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:27:55,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:27:55,905 INFO L85 PathProgramCache]: Analyzing trace with hash 636294945, now seen corresponding path program 1 times [2023-09-01 08:27:55,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:27:55,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872180851] [2023-09-01 08:27:55,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:27:55,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:27:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:27:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:27:55,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:27:55,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872180851] [2023-09-01 08:27:55,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872180851] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:27:55,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:27:55,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:27:55,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781841095] [2023-09-01 08:27:55,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:27:55,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:27:55,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:27:55,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:27:55,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 08:27:56,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 277 [2023-09-01 08:27:56,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:56,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:27:56,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 277 [2023-09-01 08:27:56,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:27:56,159 INFO L130 PetriNetUnfolder]: 937/1394 cut-off events. [2023-09-01 08:27:56,160 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 08:27:56,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2843 conditions, 1394 events. 937/1394 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 7192 event pairs, 436 based on Foata normal form. 4/498 useless extension candidates. Maximal degree in co-relation 2801. Up to 1355 conditions per place. [2023-09-01 08:27:56,166 INFO L137 encePairwiseOnDemand]: 263/277 looper letters, 23 selfloop transitions, 2 changer transitions 5/32 dead transitions. [2023-09-01 08:27:56,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 32 transitions, 167 flow [2023-09-01 08:27:56,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:27:56,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:27:56,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 502 transitions. [2023-09-01 08:27:56,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45306859205776173 [2023-09-01 08:27:56,168 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 502 transitions. [2023-09-01 08:27:56,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 502 transitions. [2023-09-01 08:27:56,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:27:56,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 502 transitions. [2023-09-01 08:27:56,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.5) internal successors, (502), 4 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:56,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 277.0) internal successors, (1385), 5 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:56,172 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 277.0) internal successors, (1385), 5 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:56,172 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 94 flow. Second operand 4 states and 502 transitions. [2023-09-01 08:27:56,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 32 transitions, 167 flow [2023-09-01 08:27:56,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 08:27:56,174 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 119 flow [2023-09-01 08:27:56,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=119, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-09-01 08:27:56,175 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 8 predicate places. [2023-09-01 08:27:56,175 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 119 flow [2023-09-01 08:27:56,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:56,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:27:56,176 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 08:27:56,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 08:27:56,177 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:27:56,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:27:56,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1753168683, now seen corresponding path program 2 times [2023-09-01 08:27:56,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:27:56,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336511930] [2023-09-01 08:27:56,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:27:56,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:27:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:27:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:27:56,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:27:56,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336511930] [2023-09-01 08:27:56,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336511930] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:27:56,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361055660] [2023-09-01 08:27:56,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:27:56,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:27:56,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:27:56,303 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) [2023-09-01 08:27:56,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 08:27:56,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:27:56,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:27:56,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 08:27:56,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:27:56,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:27:56,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:27:56,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361055660] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:27:56,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:27:56,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-09-01 08:27:56,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295067008] [2023-09-01 08:27:56,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:27:56,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:27:56,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:27:56,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:27:56,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 08:27:56,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 277 [2023-09-01 08:27:56,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:56,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:27:56,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 277 [2023-09-01 08:27:56,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:27:56,496 INFO L130 PetriNetUnfolder]: 981/1430 cut-off events. [2023-09-01 08:27:56,496 INFO L131 PetriNetUnfolder]: For 127/127 co-relation queries the response was YES. [2023-09-01 08:27:56,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4065 conditions, 1430 events. 981/1430 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 7247 event pairs, 440 based on Foata normal form. 1/467 useless extension candidates. Maximal degree in co-relation 4045. Up to 1402 conditions per place. [2023-09-01 08:27:56,501 INFO L137 encePairwiseOnDemand]: 275/277 looper letters, 23 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-09-01 08:27:56,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 26 transitions, 157 flow [2023-09-01 08:27:56,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:27:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:27:56,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-09-01 08:27:56,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584837545126354 [2023-09-01 08:27:56,503 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-09-01 08:27:56,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-09-01 08:27:56,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:27:56,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-09-01 08:27:56,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:56,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:56,506 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:56,506 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 119 flow. Second operand 3 states and 381 transitions. [2023-09-01 08:27:56,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 26 transitions, 157 flow [2023-09-01 08:27:56,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 26 transitions, 141 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-09-01 08:27:56,507 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 95 flow [2023-09-01 08:27:56,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2023-09-01 08:27:56,507 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2023-09-01 08:27:56,508 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 95 flow [2023-09-01 08:27:56,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:56,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:27:56,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 08:27:56,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 08:27:56,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:27:56,713 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:27:56,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:27:56,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1753056498, now seen corresponding path program 1 times [2023-09-01 08:27:56,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:27:56,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494217796] [2023-09-01 08:27:56,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:27:56,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:27:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:27:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:27:56,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:27:56,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494217796] [2023-09-01 08:27:56,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494217796] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:27:56,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:27:56,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:27:56,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909416820] [2023-09-01 08:27:56,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:27:56,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:27:56,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:27:56,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:27:56,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:27:56,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 277 [2023-09-01 08:27:56,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:56,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:27:56,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 277 [2023-09-01 08:27:56,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:27:56,935 INFO L130 PetriNetUnfolder]: 1329/2050 cut-off events. [2023-09-01 08:27:56,935 INFO L131 PetriNetUnfolder]: For 88/88 co-relation queries the response was YES. [2023-09-01 08:27:56,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5738 conditions, 2050 events. 1329/2050 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 12087 event pairs, 472 based on Foata normal form. 0/814 useless extension candidates. Maximal degree in co-relation 5728. Up to 1537 conditions per place. [2023-09-01 08:27:56,943 INFO L137 encePairwiseOnDemand]: 273/277 looper letters, 37 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-09-01 08:27:56,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 222 flow [2023-09-01 08:27:56,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:27:56,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:27:56,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2023-09-01 08:27:56,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777376654632972 [2023-09-01 08:27:56,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2023-09-01 08:27:56,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2023-09-01 08:27:56,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:27:56,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2023-09-01 08:27:56,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:56,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:56,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:56,948 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 95 flow. Second operand 3 states and 397 transitions. [2023-09-01 08:27:56,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 222 flow [2023-09-01 08:27:56,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 221 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:27:56,949 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 110 flow [2023-09-01 08:27:56,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2023-09-01 08:27:56,950 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2023-09-01 08:27:56,950 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 110 flow [2023-09-01 08:27:56,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:56,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:27:56,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 08:27:56,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 08:27:56,951 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:27:56,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:27:56,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1753056549, now seen corresponding path program 1 times [2023-09-01 08:27:56,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:27:56,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371269021] [2023-09-01 08:27:56,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:27:56,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:27:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:27:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:27:57,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:27:57,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371269021] [2023-09-01 08:27:57,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371269021] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:27:57,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096196536] [2023-09-01 08:27:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:27:57,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:27:57,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:27:57,009 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) [2023-09-01 08:27:57,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 08:27:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:27:57,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:27:57,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:27:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:27:57,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:27:57,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096196536] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:27:57,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:27:57,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-09-01 08:27:57,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724595728] [2023-09-01 08:27:57,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:27:57,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:27:57,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:27:57,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:27:57,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 08:27:57,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 277 [2023-09-01 08:27:57,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:57,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:27:57,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 277 [2023-09-01 08:27:57,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:27:57,166 INFO L130 PetriNetUnfolder]: 597/978 cut-off events. [2023-09-01 08:27:57,167 INFO L131 PetriNetUnfolder]: For 348/420 co-relation queries the response was YES. [2023-09-01 08:27:57,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2943 conditions, 978 events. 597/978 cut-off events. For 348/420 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 5302 event pairs, 344 based on Foata normal form. 40/570 useless extension candidates. Maximal degree in co-relation 2932. Up to 958 conditions per place. [2023-09-01 08:27:57,170 INFO L137 encePairwiseOnDemand]: 273/277 looper letters, 21 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-09-01 08:27:57,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 24 transitions, 142 flow [2023-09-01 08:27:57,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:27:57,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:27:57,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2023-09-01 08:27:57,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.457280385078219 [2023-09-01 08:27:57,172 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 380 transitions. [2023-09-01 08:27:57,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 380 transitions. [2023-09-01 08:27:57,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:27:57,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 380 transitions. [2023-09-01 08:27:57,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:57,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:57,174 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:57,175 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 110 flow. Second operand 3 states and 380 transitions. [2023-09-01 08:27:57,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 24 transitions, 142 flow [2023-09-01 08:27:57,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 24 transitions, 140 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:27:57,175 INFO L231 Difference]: Finished difference. Result has 33 places, 24 transitions, 98 flow [2023-09-01 08:27:57,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=33, PETRI_TRANSITIONS=24} [2023-09-01 08:27:57,176 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2023-09-01 08:27:57,176 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 24 transitions, 98 flow [2023-09-01 08:27:57,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:57,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:27:57,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:27:57,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 08:27:57,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:27:57,381 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:27:57,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:27:57,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1489824558, now seen corresponding path program 1 times [2023-09-01 08:27:57,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:27:57,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48047839] [2023-09-01 08:27:57,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:27:57,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:27:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:27:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:27:57,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:27:57,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48047839] [2023-09-01 08:27:57,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48047839] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:27:57,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340188077] [2023-09-01 08:27:57,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:27:57,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:27:57,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:27:57,473 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) [2023-09-01 08:27:57,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 08:27:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:27:57,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:27:57,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:27:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:27:57,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:27:57,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340188077] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:27:57,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:27:57,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2023-09-01 08:27:57,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280022883] [2023-09-01 08:27:57,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:27:57,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:27:57,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:27:57,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:27:57,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-09-01 08:27:57,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 277 [2023-09-01 08:27:57,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 24 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:57,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:27:57,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 277 [2023-09-01 08:27:57,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:27:57,683 INFO L130 PetriNetUnfolder]: 665/1042 cut-off events. [2023-09-01 08:27:57,684 INFO L131 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2023-09-01 08:27:57,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3076 conditions, 1042 events. 665/1042 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 5440 event pairs, 16 based on Foata normal form. 0/618 useless extension candidates. Maximal degree in co-relation 3064. Up to 737 conditions per place. [2023-09-01 08:27:57,687 INFO L137 encePairwiseOnDemand]: 274/277 looper letters, 37 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-09-01 08:27:57,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 227 flow [2023-09-01 08:27:57,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:27:57,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:27:57,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 516 transitions. [2023-09-01 08:27:57,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4657039711191336 [2023-09-01 08:27:57,689 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 516 transitions. [2023-09-01 08:27:57,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 516 transitions. [2023-09-01 08:27:57,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:27:57,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 516 transitions. [2023-09-01 08:27:57,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:57,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 277.0) internal successors, (1385), 5 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:57,692 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 277.0) internal successors, (1385), 5 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:57,692 INFO L175 Difference]: Start difference. First operand has 33 places, 24 transitions, 98 flow. Second operand 4 states and 516 transitions. [2023-09-01 08:27:57,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 227 flow [2023-09-01 08:27:57,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:27:57,693 INFO L231 Difference]: Finished difference. Result has 34 places, 23 transitions, 95 flow [2023-09-01 08:27:57,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=34, PETRI_TRANSITIONS=23} [2023-09-01 08:27:57,694 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2023-09-01 08:27:57,694 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 23 transitions, 95 flow [2023-09-01 08:27:57,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:57,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:27:57,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:27:57,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 08:27:57,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:27:57,900 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:27:57,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:27:57,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1489824575, now seen corresponding path program 1 times [2023-09-01 08:27:57,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:27:57,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474303193] [2023-09-01 08:27:57,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:27:57,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:27:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:27:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:27:57,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:27:57,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474303193] [2023-09-01 08:27:57,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474303193] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:27:57,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767091985] [2023-09-01 08:27:57,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:27:57,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:27:57,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:27:57,931 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) [2023-09-01 08:27:57,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 08:27:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:27:57,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 08:27:57,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:27:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:27:58,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:27:58,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:27:58,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767091985] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:27:58,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:27:58,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2023-09-01 08:27:58,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860864088] [2023-09-01 08:27:58,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:27:58,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 08:27:58,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:27:58,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 08:27:58,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-09-01 08:27:58,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 277 [2023-09-01 08:27:58,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 23 transitions, 95 flow. Second operand has 11 states, 11 states have (on average 111.72727272727273) internal successors, (1229), 11 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:58,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:27:58,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 277 [2023-09-01 08:27:58,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:27:58,404 INFO L130 PetriNetUnfolder]: 745/1191 cut-off events. [2023-09-01 08:27:58,404 INFO L131 PetriNetUnfolder]: For 324/324 co-relation queries the response was YES. [2023-09-01 08:27:58,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3562 conditions, 1191 events. 745/1191 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 6288 event pairs, 167 based on Foata normal form. 40/759 useless extension candidates. Maximal degree in co-relation 3550. Up to 836 conditions per place. [2023-09-01 08:27:58,412 INFO L137 encePairwiseOnDemand]: 266/277 looper letters, 62 selfloop transitions, 17 changer transitions 5/85 dead transitions. [2023-09-01 08:27:58,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 85 transitions, 485 flow [2023-09-01 08:27:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 08:27:58,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 08:27:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1298 transitions. [2023-09-01 08:27:58,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4259927797833935 [2023-09-01 08:27:58,416 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1298 transitions. [2023-09-01 08:27:58,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1298 transitions. [2023-09-01 08:27:58,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:27:58,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1298 transitions. [2023-09-01 08:27:58,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 118.0) internal successors, (1298), 11 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:58,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 277.0) internal successors, (3324), 12 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:58,422 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 277.0) internal successors, (3324), 12 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:58,422 INFO L175 Difference]: Start difference. First operand has 34 places, 23 transitions, 95 flow. Second operand 11 states and 1298 transitions. [2023-09-01 08:27:58,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 85 transitions, 485 flow [2023-09-01 08:27:58,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 85 transitions, 477 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 08:27:58,424 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 233 flow [2023-09-01 08:27:58,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=233, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2023-09-01 08:27:58,425 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 17 predicate places. [2023-09-01 08:27:58,425 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 233 flow [2023-09-01 08:27:58,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 111.72727272727273) internal successors, (1229), 11 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:58,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:27:58,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:27:58,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 08:27:58,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:27:58,632 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:27:58,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:27:58,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1056042577, now seen corresponding path program 1 times [2023-09-01 08:27:58,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:27:58,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712938031] [2023-09-01 08:27:58,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:27:58,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:27:58,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:27:58,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:27:58,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:27:58,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712938031] [2023-09-01 08:27:58,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712938031] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:27:58,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:27:58,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:27:58,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002438757] [2023-09-01 08:27:58,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:27:58,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:27:58,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:27:58,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:27:58,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:27:58,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 277 [2023-09-01 08:27:58,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 35 transitions, 233 flow. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:58,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:27:58,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 277 [2023-09-01 08:27:58,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:27:58,791 INFO L130 PetriNetUnfolder]: 593/966 cut-off events. [2023-09-01 08:27:58,791 INFO L131 PetriNetUnfolder]: For 1204/1218 co-relation queries the response was YES. [2023-09-01 08:27:58,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4308 conditions, 966 events. 593/966 cut-off events. For 1204/1218 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 4777 event pairs, 176 based on Foata normal form. 18/582 useless extension candidates. Maximal degree in co-relation 4289. Up to 933 conditions per place. [2023-09-01 08:27:58,798 INFO L137 encePairwiseOnDemand]: 270/277 looper letters, 24 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2023-09-01 08:27:58,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 32 transitions, 257 flow [2023-09-01 08:27:58,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:27:58,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:27:58,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 379 transitions. [2023-09-01 08:27:58,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45607701564380265 [2023-09-01 08:27:58,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 379 transitions. [2023-09-01 08:27:58,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 379 transitions. [2023-09-01 08:27:58,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:27:58,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 379 transitions. [2023-09-01 08:27:58,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:58,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:58,802 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:58,802 INFO L175 Difference]: Start difference. First operand has 48 places, 35 transitions, 233 flow. Second operand 3 states and 379 transitions. [2023-09-01 08:27:58,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 32 transitions, 257 flow [2023-09-01 08:27:58,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 32 transitions, 232 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-09-01 08:27:58,806 INFO L231 Difference]: Finished difference. Result has 46 places, 29 transitions, 191 flow [2023-09-01 08:27:58,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=46, PETRI_TRANSITIONS=29} [2023-09-01 08:27:58,807 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 15 predicate places. [2023-09-01 08:27:58,807 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 29 transitions, 191 flow [2023-09-01 08:27:58,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:58,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:27:58,808 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-09-01 08:27:58,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 08:27:58,808 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:27:58,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:27:58,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1737438939, now seen corresponding path program 2 times [2023-09-01 08:27:58,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:27:58,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553494645] [2023-09-01 08:27:58,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:27:58,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:27:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:27:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:27:58,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:27:58,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553494645] [2023-09-01 08:27:58,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553494645] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:27:58,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392020134] [2023-09-01 08:27:58,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:27:58,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:27:58,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:27:58,875 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) [2023-09-01 08:27:58,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 08:27:58,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:27:58,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:27:58,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:27:58,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:27:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:27:58,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:27:58,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392020134] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:27:58,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:27:58,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-09-01 08:27:58,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98206032] [2023-09-01 08:27:58,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:27:58,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:27:58,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:27:58,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:27:58,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 08:27:58,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 277 [2023-09-01 08:27:58,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 29 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:58,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:27:58,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 277 [2023-09-01 08:27:58,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:27:59,019 INFO L130 PetriNetUnfolder]: 486/823 cut-off events. [2023-09-01 08:27:59,019 INFO L131 PetriNetUnfolder]: For 1285/1297 co-relation queries the response was YES. [2023-09-01 08:27:59,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4001 conditions, 823 events. 486/823 cut-off events. For 1285/1297 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 4350 event pairs, 257 based on Foata normal form. 12/521 useless extension candidates. Maximal degree in co-relation 3981. Up to 807 conditions per place. [2023-09-01 08:27:59,023 INFO L137 encePairwiseOnDemand]: 275/277 looper letters, 23 selfloop transitions, 1 changer transitions 1/28 dead transitions. [2023-09-01 08:27:59,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 28 transitions, 231 flow [2023-09-01 08:27:59,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:27:59,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:27:59,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2023-09-01 08:27:59,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45246690734055356 [2023-09-01 08:27:59,024 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2023-09-01 08:27:59,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2023-09-01 08:27:59,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:27:59,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2023-09-01 08:27:59,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:59,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:59,027 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:59,027 INFO L175 Difference]: Start difference. First operand has 46 places, 29 transitions, 191 flow. Second operand 3 states and 376 transitions. [2023-09-01 08:27:59,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 28 transitions, 231 flow [2023-09-01 08:27:59,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 28 transitions, 200 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-09-01 08:27:59,030 INFO L231 Difference]: Finished difference. Result has 45 places, 27 transitions, 146 flow [2023-09-01 08:27:59,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=45, PETRI_TRANSITIONS=27} [2023-09-01 08:27:59,031 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 14 predicate places. [2023-09-01 08:27:59,031 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 27 transitions, 146 flow [2023-09-01 08:27:59,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:59,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:27:59,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:27:59,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 08:27:59,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:27:59,236 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:27:59,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:27:59,237 INFO L85 PathProgramCache]: Analyzing trace with hash -831438277, now seen corresponding path program 1 times [2023-09-01 08:27:59,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:27:59,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725056201] [2023-09-01 08:27:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:27:59,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:27:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:27:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:27:59,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:27:59,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725056201] [2023-09-01 08:27:59,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725056201] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:27:59,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414597879] [2023-09-01 08:27:59,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:27:59,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:27:59,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:27:59,575 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) [2023-09-01 08:27:59,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 08:27:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:27:59,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 08:27:59,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:27:59,709 INFO L350 Elim1Store]: Elim1 eliminated variable 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 [2023-09-01 08:27:59,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:27:59,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:27:59,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:27:59,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2023-09-01 08:27:59,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:27:59,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:28:00,119 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:28:00,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-09-01 08:28:00,128 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:28:00,129 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 173 treesize of output 157 [2023-09-01 08:28:00,138 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 [2023-09-01 08:28:00,172 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 [2023-09-01 08:28:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:00,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414597879] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:28:00,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:28:00,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-09-01 08:28:00,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974490404] [2023-09-01 08:28:00,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:28:00,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 08:28:00,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:28:00,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 08:28:00,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=218, Unknown=4, NotChecked=0, Total=272 [2023-09-01 08:28:00,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 277 [2023-09-01 08:28:00,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 27 transitions, 146 flow. Second operand has 17 states, 17 states have (on average 81.41176470588235) internal successors, (1384), 17 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:00,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:28:00,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 277 [2023-09-01 08:28:00,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:28:03,195 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] [2023-09-01 08:28:03,581 INFO L130 PetriNetUnfolder]: 396/699 cut-off events. [2023-09-01 08:28:03,581 INFO L131 PetriNetUnfolder]: For 823/837 co-relation queries the response was YES. [2023-09-01 08:28:03,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2607 conditions, 699 events. 396/699 cut-off events. For 823/837 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3376 event pairs, 124 based on Foata normal form. 18/521 useless extension candidates. Maximal degree in co-relation 2587. Up to 572 conditions per place. [2023-09-01 08:28:03,585 INFO L137 encePairwiseOnDemand]: 268/277 looper letters, 42 selfloop transitions, 22 changer transitions 6/73 dead transitions. [2023-09-01 08:28:03,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 73 transitions, 484 flow [2023-09-01 08:28:03,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 08:28:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 08:28:03,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1190 transitions. [2023-09-01 08:28:03,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30685920577617326 [2023-09-01 08:28:03,588 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1190 transitions. [2023-09-01 08:28:03,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1190 transitions. [2023-09-01 08:28:03,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:28:03,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1190 transitions. [2023-09-01 08:28:03,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 85.0) internal successors, (1190), 14 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:03,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 277.0) internal successors, (4155), 15 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:03,595 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 277.0) internal successors, (4155), 15 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:03,595 INFO L175 Difference]: Start difference. First operand has 45 places, 27 transitions, 146 flow. Second operand 14 states and 1190 transitions. [2023-09-01 08:28:03,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 73 transitions, 484 flow [2023-09-01 08:28:03,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 73 transitions, 483 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:28:03,598 INFO L231 Difference]: Finished difference. Result has 63 places, 42 transitions, 339 flow [2023-09-01 08:28:03,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=339, PETRI_PLACES=63, PETRI_TRANSITIONS=42} [2023-09-01 08:28:03,598 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2023-09-01 08:28:03,598 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 42 transitions, 339 flow [2023-09-01 08:28:03,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 81.41176470588235) internal successors, (1384), 17 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:03,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:28:03,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:28:03,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 08:28:03,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 08:28:03,805 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:28:03,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:28:03,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1245191853, now seen corresponding path program 1 times [2023-09-01 08:28:03,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:28:03,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772988146] [2023-09-01 08:28:03,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:28:03,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:28:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:28:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:04,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:28:04,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772988146] [2023-09-01 08:28:04,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772988146] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:28:04,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714020096] [2023-09-01 08:28:04,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:28:04,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:28:04,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:28:04,083 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) [2023-09-01 08:28:04,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 08:28:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:28:04,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 08:28:04,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:28:04,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 08:28:04,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:28:04,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:28:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:04,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:28:04,566 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:28:04,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2023-09-01 08:28:04,581 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:28:04,581 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 152 treesize of output 144 [2023-09-01 08:28:04,590 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:28:04,591 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 136 treesize of output 120 [2023-09-01 08:28:04,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:28:04,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 81 [2023-09-01 08:28:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:04,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714020096] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:28:04,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:28:04,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 16 [2023-09-01 08:28:04,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636151851] [2023-09-01 08:28:04,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:28:04,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 08:28:04,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:28:04,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 08:28:04,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=226, Unknown=1, NotChecked=0, Total=306 [2023-09-01 08:28:05,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 277 [2023-09-01 08:28:05,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 42 transitions, 339 flow. Second operand has 18 states, 18 states have (on average 73.5) internal successors, (1323), 18 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:05,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:28:05,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 277 [2023-09-01 08:28:05,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:28:08,088 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] [2023-09-01 08:28:08,212 INFO L130 PetriNetUnfolder]: 609/1094 cut-off events. [2023-09-01 08:28:08,213 INFO L131 PetriNetUnfolder]: For 4439/4439 co-relation queries the response was YES. [2023-09-01 08:28:08,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5446 conditions, 1094 events. 609/1094 cut-off events. For 4439/4439 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5906 event pairs, 90 based on Foata normal form. 2/934 useless extension candidates. Maximal degree in co-relation 5418. Up to 675 conditions per place. [2023-09-01 08:28:08,217 INFO L137 encePairwiseOnDemand]: 266/277 looper letters, 65 selfloop transitions, 53 changer transitions 0/119 dead transitions. [2023-09-01 08:28:08,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 119 transitions, 1068 flow [2023-09-01 08:28:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 08:28:08,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 08:28:08,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1539 transitions. [2023-09-01 08:28:08,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27779783393501806 [2023-09-01 08:28:08,221 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1539 transitions. [2023-09-01 08:28:08,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1539 transitions. [2023-09-01 08:28:08,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:28:08,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1539 transitions. [2023-09-01 08:28:08,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 76.95) internal successors, (1539), 20 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:08,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 277.0) internal successors, (5817), 21 states have internal predecessors, (5817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:08,229 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 277.0) internal successors, (5817), 21 states have internal predecessors, (5817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:08,229 INFO L175 Difference]: Start difference. First operand has 63 places, 42 transitions, 339 flow. Second operand 20 states and 1539 transitions. [2023-09-01 08:28:08,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 119 transitions, 1068 flow [2023-09-01 08:28:08,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 119 transitions, 991 flow, removed 34 selfloop flow, removed 5 redundant places. [2023-09-01 08:28:08,238 INFO L231 Difference]: Finished difference. Result has 81 places, 82 transitions, 761 flow [2023-09-01 08:28:08,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=761, PETRI_PLACES=81, PETRI_TRANSITIONS=82} [2023-09-01 08:28:08,239 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 50 predicate places. [2023-09-01 08:28:08,239 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 82 transitions, 761 flow [2023-09-01 08:28:08,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 73.5) internal successors, (1323), 18 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:08,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:28:08,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:28:08,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-09-01 08:28:08,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 08:28:08,445 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:28:08,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:28:08,445 INFO L85 PathProgramCache]: Analyzing trace with hash -827744237, now seen corresponding path program 2 times [2023-09-01 08:28:08,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:28:08,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475529787] [2023-09-01 08:28:08,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:28:08,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:28:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:28:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:08,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:28:08,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475529787] [2023-09-01 08:28:08,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475529787] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:28:08,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695739417] [2023-09-01 08:28:08,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:28:08,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:28:08,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:28:08,772 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) [2023-09-01 08:28:08,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 08:28:08,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:28:08,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:28:08,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 08:28:08,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:28:08,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:28:08,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2023-09-01 08:28:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:28:09,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:28:09,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695739417] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:28:09,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:28:09,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2023-09-01 08:28:09,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568490239] [2023-09-01 08:28:09,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:28:09,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:28:09,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:28:09,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:28:09,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-09-01 08:28:09,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 277 [2023-09-01 08:28:09,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 761 flow. Second operand has 7 states, 7 states have (on average 105.28571428571429) internal successors, (737), 7 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:09,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:28:09,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 277 [2023-09-01 08:28:09,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:28:09,318 INFO L130 PetriNetUnfolder]: 554/1036 cut-off events. [2023-09-01 08:28:09,319 INFO L131 PetriNetUnfolder]: For 5760/5760 co-relation queries the response was YES. [2023-09-01 08:28:09,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5577 conditions, 1036 events. 554/1036 cut-off events. For 5760/5760 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5578 event pairs, 72 based on Foata normal form. 60/1090 useless extension candidates. Maximal degree in co-relation 5543. Up to 724 conditions per place. [2023-09-01 08:28:09,323 INFO L137 encePairwiseOnDemand]: 269/277 looper letters, 60 selfloop transitions, 40 changer transitions 0/101 dead transitions. [2023-09-01 08:28:09,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 101 transitions, 1096 flow [2023-09-01 08:28:09,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 08:28:09,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 08:28:09,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 657 transitions. [2023-09-01 08:28:09,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953068592057762 [2023-09-01 08:28:09,325 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 657 transitions. [2023-09-01 08:28:09,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 657 transitions. [2023-09-01 08:28:09,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:28:09,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 657 transitions. [2023-09-01 08:28:09,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 109.5) internal successors, (657), 6 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:09,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 277.0) internal successors, (1939), 7 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:09,329 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 277.0) internal successors, (1939), 7 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:09,329 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 761 flow. Second operand 6 states and 657 transitions. [2023-09-01 08:28:09,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 101 transitions, 1096 flow [2023-09-01 08:28:09,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 101 transitions, 983 flow, removed 43 selfloop flow, removed 10 redundant places. [2023-09-01 08:28:09,343 INFO L231 Difference]: Finished difference. Result has 76 places, 87 transitions, 829 flow [2023-09-01 08:28:09,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=829, PETRI_PLACES=76, PETRI_TRANSITIONS=87} [2023-09-01 08:28:09,344 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 45 predicate places. [2023-09-01 08:28:09,344 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 87 transitions, 829 flow [2023-09-01 08:28:09,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 105.28571428571429) internal successors, (737), 7 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:09,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:28:09,344 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:28:09,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 08:28:09,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 08:28:09,549 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:28:09,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:28:09,550 INFO L85 PathProgramCache]: Analyzing trace with hash -453845015, now seen corresponding path program 1 times [2023-09-01 08:28:09,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:28:09,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278805553] [2023-09-01 08:28:09,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:28:09,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:28:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:28:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:10,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:28:10,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278805553] [2023-09-01 08:28:10,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278805553] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:28:10,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320317169] [2023-09-01 08:28:10,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:28:10,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:28:10,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:28:10,373 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) [2023-09-01 08:28:10,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 08:28:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:28:10,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 08:28:10,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:28:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:28:10,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:28:10,621 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:28:10,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-09-01 08:28:10,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:28:10,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320317169] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 08:28:10,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 08:28:10,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 6] total 17 [2023-09-01 08:28:10,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874371707] [2023-09-01 08:28:10,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:28:10,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 08:28:10,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:28:10,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 08:28:10,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-09-01 08:28:10,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 277 [2023-09-01 08:28:10,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 87 transitions, 829 flow. Second operand has 6 states, 6 states have (on average 107.5) internal successors, (645), 6 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:10,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:28:10,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 277 [2023-09-01 08:28:10,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:28:10,925 INFO L130 PetriNetUnfolder]: 480/926 cut-off events. [2023-09-01 08:28:10,925 INFO L131 PetriNetUnfolder]: For 4727/4729 co-relation queries the response was YES. [2023-09-01 08:28:10,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5098 conditions, 926 events. 480/926 cut-off events. For 4727/4729 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4922 event pairs, 34 based on Foata normal form. 45/965 useless extension candidates. Maximal degree in co-relation 5066. Up to 490 conditions per place. [2023-09-01 08:28:10,930 INFO L137 encePairwiseOnDemand]: 270/277 looper letters, 71 selfloop transitions, 42 changer transitions 0/114 dead transitions. [2023-09-01 08:28:10,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 114 transitions, 1273 flow [2023-09-01 08:28:10,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 08:28:10,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 08:28:10,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 675 transitions. [2023-09-01 08:28:10,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40613718411552346 [2023-09-01 08:28:10,932 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 675 transitions. [2023-09-01 08:28:10,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 675 transitions. [2023-09-01 08:28:10,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:28:10,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 675 transitions. [2023-09-01 08:28:10,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 112.5) internal successors, (675), 6 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:10,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 277.0) internal successors, (1939), 7 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:10,935 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 277.0) internal successors, (1939), 7 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:10,935 INFO L175 Difference]: Start difference. First operand has 76 places, 87 transitions, 829 flow. Second operand 6 states and 675 transitions. [2023-09-01 08:28:10,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 114 transitions, 1273 flow [2023-09-01 08:28:10,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 114 transitions, 1186 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-09-01 08:28:10,946 INFO L231 Difference]: Finished difference. Result has 78 places, 96 transitions, 985 flow [2023-09-01 08:28:10,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=985, PETRI_PLACES=78, PETRI_TRANSITIONS=96} [2023-09-01 08:28:10,946 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 47 predicate places. [2023-09-01 08:28:10,946 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 96 transitions, 985 flow [2023-09-01 08:28:10,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 107.5) internal successors, (645), 6 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:10,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:28:10,947 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:28:10,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 08:28:11,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 08:28:11,153 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:28:11,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:28:11,153 INFO L85 PathProgramCache]: Analyzing trace with hash -863771889, now seen corresponding path program 1 times [2023-09-01 08:28:11,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:28:11,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279247359] [2023-09-01 08:28:11,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:28:11,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:28:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:28:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:11,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:28:11,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279247359] [2023-09-01 08:28:11,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279247359] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:28:11,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074072939] [2023-09-01 08:28:11,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:28:11,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:28:11,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:28:11,786 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) [2023-09-01 08:28:11,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 08:28:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:28:11,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 08:28:11,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:28:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:28:11,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:28:11,951 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:28:11,952 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 27 treesize of output 19 [2023-09-01 08:28:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:28:12,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074072939] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 08:28:12,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 08:28:12,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7, 4] total 13 [2023-09-01 08:28:12,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571808394] [2023-09-01 08:28:12,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:28:12,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:28:12,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:28:12,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:28:12,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-09-01 08:28:12,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 277 [2023-09-01 08:28:12,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 96 transitions, 985 flow. Second operand has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:12,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:28:12,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 277 [2023-09-01 08:28:12,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:28:12,165 INFO L130 PetriNetUnfolder]: 462/890 cut-off events. [2023-09-01 08:28:12,166 INFO L131 PetriNetUnfolder]: For 5666/5676 co-relation queries the response was YES. [2023-09-01 08:28:12,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5153 conditions, 890 events. 462/890 cut-off events. For 5666/5676 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4694 event pairs, 50 based on Foata normal form. 21/899 useless extension candidates. Maximal degree in co-relation 5121. Up to 641 conditions per place. [2023-09-01 08:28:12,181 INFO L137 encePairwiseOnDemand]: 271/277 looper letters, 60 selfloop transitions, 35 changer transitions 0/102 dead transitions. [2023-09-01 08:28:12,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 102 transitions, 1186 flow [2023-09-01 08:28:12,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:28:12,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:28:12,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 475 transitions. [2023-09-01 08:28:12,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4287003610108303 [2023-09-01 08:28:12,183 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 475 transitions. [2023-09-01 08:28:12,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 475 transitions. [2023-09-01 08:28:12,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:28:12,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 475 transitions. [2023-09-01 08:28:12,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:12,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 277.0) internal successors, (1385), 5 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:12,186 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 277.0) internal successors, (1385), 5 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:12,186 INFO L175 Difference]: Start difference. First operand has 78 places, 96 transitions, 985 flow. Second operand 4 states and 475 transitions. [2023-09-01 08:28:12,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 102 transitions, 1186 flow [2023-09-01 08:28:12,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 102 transitions, 1141 flow, removed 15 selfloop flow, removed 1 redundant places. [2023-09-01 08:28:12,194 INFO L231 Difference]: Finished difference. Result has 80 places, 94 transitions, 983 flow [2023-09-01 08:28:12,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=913, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=983, PETRI_PLACES=80, PETRI_TRANSITIONS=94} [2023-09-01 08:28:12,195 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 49 predicate places. [2023-09-01 08:28:12,195 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 94 transitions, 983 flow [2023-09-01 08:28:12,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:12,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:28:12,195 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:28:12,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 08:28:12,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 08:28:12,401 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:28:12,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:28:12,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1633192239, now seen corresponding path program 1 times [2023-09-01 08:28:12,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:28:12,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916016867] [2023-09-01 08:28:12,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:28:12,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:28:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:28:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:28:12,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:28:12,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916016867] [2023-09-01 08:28:12,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916016867] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:28:12,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198220621] [2023-09-01 08:28:12,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:28:12,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:28:12,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:28:12,465 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) [2023-09-01 08:28:12,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 08:28:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:28:12,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 08:28:12,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:28:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:28:12,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:28:12,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198220621] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:28:12,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:28:12,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 3 [2023-09-01 08:28:12,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627304665] [2023-09-01 08:28:12,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:28:12,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:28:12,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:28:12,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:28:12,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 08:28:12,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 277 [2023-09-01 08:28:12,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 94 transitions, 983 flow. Second operand has 4 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:12,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:28:12,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 277 [2023-09-01 08:28:12,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:28:12,697 INFO L130 PetriNetUnfolder]: 483/985 cut-off events. [2023-09-01 08:28:12,698 INFO L131 PetriNetUnfolder]: For 6478/6488 co-relation queries the response was YES. [2023-09-01 08:28:12,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5628 conditions, 985 events. 483/985 cut-off events. For 6478/6488 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5560 event pairs, 56 based on Foata normal form. 109/1084 useless extension candidates. Maximal degree in co-relation 5595. Up to 564 conditions per place. [2023-09-01 08:28:12,703 INFO L137 encePairwiseOnDemand]: 271/277 looper letters, 67 selfloop transitions, 34 changer transitions 16/123 dead transitions. [2023-09-01 08:28:12,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 123 transitions, 1539 flow [2023-09-01 08:28:12,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:28:12,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:28:12,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 506 transitions. [2023-09-01 08:28:12,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4566787003610108 [2023-09-01 08:28:12,705 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 506 transitions. [2023-09-01 08:28:12,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 506 transitions. [2023-09-01 08:28:12,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:28:12,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 506 transitions. [2023-09-01 08:28:12,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:12,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 277.0) internal successors, (1385), 5 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:12,708 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 277.0) internal successors, (1385), 5 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:12,708 INFO L175 Difference]: Start difference. First operand has 80 places, 94 transitions, 983 flow. Second operand 4 states and 506 transitions. [2023-09-01 08:28:12,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 123 transitions, 1539 flow [2023-09-01 08:28:12,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 123 transitions, 1451 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 08:28:12,718 INFO L231 Difference]: Finished difference. Result has 80 places, 95 transitions, 1186 flow [2023-09-01 08:28:12,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1186, PETRI_PLACES=80, PETRI_TRANSITIONS=95} [2023-09-01 08:28:12,719 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 49 predicate places. [2023-09-01 08:28:12,719 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 95 transitions, 1186 flow [2023-09-01 08:28:12,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:12,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:28:12,720 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:28:12,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 08:28:12,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 08:28:12,925 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:28:12,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:28:12,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1059529365, now seen corresponding path program 2 times [2023-09-01 08:28:12,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:28:12,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280949135] [2023-09-01 08:28:12,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:28:12,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:28:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:28:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:13,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:28:13,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280949135] [2023-09-01 08:28:13,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280949135] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:28:13,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283087624] [2023-09-01 08:28:13,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:28:13,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:28:13,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:28:13,320 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) [2023-09-01 08:28:13,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 08:28:13,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:28:13,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:28:13,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 08:28:13,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:28:13,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:28:13,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:28:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:28:13,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:28:13,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283087624] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:28:13,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:28:13,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-09-01 08:28:13,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193153258] [2023-09-01 08:28:13,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:28:13,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 08:28:13,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:28:13,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 08:28:13,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-09-01 08:28:13,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 277 [2023-09-01 08:28:13,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 95 transitions, 1186 flow. Second operand has 6 states, 6 states have (on average 108.33333333333333) internal successors, (650), 6 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:13,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:28:13,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 277 [2023-09-01 08:28:13,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:28:13,707 INFO L130 PetriNetUnfolder]: 423/867 cut-off events. [2023-09-01 08:28:13,707 INFO L131 PetriNetUnfolder]: For 8358/8369 co-relation queries the response was YES. [2023-09-01 08:28:13,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5605 conditions, 867 events. 423/867 cut-off events. For 8358/8369 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4774 event pairs, 105 based on Foata normal form. 28/891 useless extension candidates. Maximal degree in co-relation 5570. Up to 789 conditions per place. [2023-09-01 08:28:13,711 INFO L137 encePairwiseOnDemand]: 271/277 looper letters, 84 selfloop transitions, 10 changer transitions 2/102 dead transitions. [2023-09-01 08:28:13,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 102 transitions, 1411 flow [2023-09-01 08:28:13,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:28:13,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:28:13,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 455 transitions. [2023-09-01 08:28:13,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41064981949458484 [2023-09-01 08:28:13,713 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 455 transitions. [2023-09-01 08:28:13,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 455 transitions. [2023-09-01 08:28:13,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:28:13,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 455 transitions. [2023-09-01 08:28:13,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.75) internal successors, (455), 4 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:13,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 277.0) internal successors, (1385), 5 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:13,715 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 277.0) internal successors, (1385), 5 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:13,715 INFO L175 Difference]: Start difference. First operand has 80 places, 95 transitions, 1186 flow. Second operand 4 states and 455 transitions. [2023-09-01 08:28:13,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 102 transitions, 1411 flow [2023-09-01 08:28:13,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 102 transitions, 1302 flow, removed 44 selfloop flow, removed 3 redundant places. [2023-09-01 08:28:13,729 INFO L231 Difference]: Finished difference. Result has 75 places, 93 transitions, 1085 flow [2023-09-01 08:28:13,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1085, PETRI_PLACES=75, PETRI_TRANSITIONS=93} [2023-09-01 08:28:13,730 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 44 predicate places. [2023-09-01 08:28:13,730 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 93 transitions, 1085 flow [2023-09-01 08:28:13,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 108.33333333333333) internal successors, (650), 6 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:13,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:28:13,730 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:28:13,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 08:28:13,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:28:13,935 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:28:13,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:28:13,936 INFO L85 PathProgramCache]: Analyzing trace with hash -950917243, now seen corresponding path program 1 times [2023-09-01 08:28:13,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:28:13,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730946501] [2023-09-01 08:28:13,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:28:13,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:28:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:28:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:14,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:28:14,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730946501] [2023-09-01 08:28:14,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730946501] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:28:14,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765183134] [2023-09-01 08:28:14,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:28:14,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:28:14,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:28:14,628 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) [2023-09-01 08:28:14,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 08:28:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:28:14,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 08:28:14,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:28:14,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:28:14,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2023-09-01 08:28:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:28:14,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:28:14,918 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_539 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_539) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))) 2147483648)) is different from false [2023-09-01 08:28:14,933 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:28:14,933 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 [2023-09-01 08:28:14,937 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 [2023-09-01 08:28:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:28:15,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765183134] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:28:15,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:28:15,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 20 [2023-09-01 08:28:15,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367548279] [2023-09-01 08:28:15,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:28:15,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 08:28:15,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:28:15,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 08:28:15,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=365, Unknown=1, NotChecked=38, Total=462 [2023-09-01 08:28:15,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 277 [2023-09-01 08:28:15,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 93 transitions, 1085 flow. Second operand has 22 states, 22 states have (on average 73.54545454545455) internal successors, (1618), 22 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:15,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:28:15,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 277 [2023-09-01 08:28:15,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:28:16,505 INFO L130 PetriNetUnfolder]: 382/809 cut-off events. [2023-09-01 08:28:16,506 INFO L131 PetriNetUnfolder]: For 6328/6340 co-relation queries the response was YES. [2023-09-01 08:28:16,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4719 conditions, 809 events. 382/809 cut-off events. For 6328/6340 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4462 event pairs, 30 based on Foata normal form. 53/862 useless extension candidates. Maximal degree in co-relation 4683. Up to 346 conditions per place. [2023-09-01 08:28:16,510 INFO L137 encePairwiseOnDemand]: 268/277 looper letters, 71 selfloop transitions, 67 changer transitions 10/149 dead transitions. [2023-09-01 08:28:16,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 149 transitions, 1744 flow [2023-09-01 08:28:16,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 08:28:16,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 08:28:16,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1609 transitions. [2023-09-01 08:28:16,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2766030599965618 [2023-09-01 08:28:16,512 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1609 transitions. [2023-09-01 08:28:16,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1609 transitions. [2023-09-01 08:28:16,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:28:16,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1609 transitions. [2023-09-01 08:28:16,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 76.61904761904762) internal successors, (1609), 21 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:16,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 277.0) internal successors, (6094), 22 states have internal predecessors, (6094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:16,520 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 277.0) internal successors, (6094), 22 states have internal predecessors, (6094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:16,520 INFO L175 Difference]: Start difference. First operand has 75 places, 93 transitions, 1085 flow. Second operand 21 states and 1609 transitions. [2023-09-01 08:28:16,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 149 transitions, 1744 flow [2023-09-01 08:28:16,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 149 transitions, 1719 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 08:28:16,530 INFO L231 Difference]: Finished difference. Result has 96 places, 103 transitions, 1343 flow [2023-09-01 08:28:16,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1343, PETRI_PLACES=96, PETRI_TRANSITIONS=103} [2023-09-01 08:28:16,531 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 65 predicate places. [2023-09-01 08:28:16,531 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 103 transitions, 1343 flow [2023-09-01 08:28:16,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 73.54545454545455) internal successors, (1618), 22 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:16,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:28:16,531 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:28:16,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 08:28:16,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:28:16,737 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:28:16,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:28:16,738 INFO L85 PathProgramCache]: Analyzing trace with hash -2139376093, now seen corresponding path program 1 times [2023-09-01 08:28:16,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:28:16,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160466581] [2023-09-01 08:28:16,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:28:16,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:28:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:28:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:16,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:28:16,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160466581] [2023-09-01 08:28:16,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160466581] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:28:16,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993965309] [2023-09-01 08:28:16,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:28:16,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:28:16,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:28:16,845 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) [2023-09-01 08:28:16,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 08:28:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:28:16,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 08:28:16,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:28:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:16,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:28:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:17,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993965309] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:28:17,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:28:17,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-09-01 08:28:17,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630874063] [2023-09-01 08:28:17,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:28:17,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 08:28:17,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:28:17,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 08:28:17,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2023-09-01 08:28:17,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 277 [2023-09-01 08:28:17,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 103 transitions, 1343 flow. Second operand has 18 states, 18 states have (on average 113.77777777777777) internal successors, (2048), 18 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:17,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:28:17,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 277 [2023-09-01 08:28:17,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:28:17,361 INFO L130 PetriNetUnfolder]: 360/794 cut-off events. [2023-09-01 08:28:17,362 INFO L131 PetriNetUnfolder]: For 7079/7093 co-relation queries the response was YES. [2023-09-01 08:28:17,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4931 conditions, 794 events. 360/794 cut-off events. For 7079/7093 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4586 event pairs, 163 based on Foata normal form. 65/859 useless extension candidates. Maximal degree in co-relation 4892. Up to 607 conditions per place. [2023-09-01 08:28:17,366 INFO L137 encePairwiseOnDemand]: 272/277 looper letters, 100 selfloop transitions, 15 changer transitions 1/122 dead transitions. [2023-09-01 08:28:17,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 122 transitions, 1761 flow [2023-09-01 08:28:17,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 08:28:17,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 08:28:17,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 935 transitions. [2023-09-01 08:28:17,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42193140794223827 [2023-09-01 08:28:17,368 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 935 transitions. [2023-09-01 08:28:17,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 935 transitions. [2023-09-01 08:28:17,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:28:17,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 935 transitions. [2023-09-01 08:28:17,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 116.875) internal successors, (935), 8 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:17,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 277.0) internal successors, (2493), 9 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:17,371 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 277.0) internal successors, (2493), 9 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:17,371 INFO L175 Difference]: Start difference. First operand has 96 places, 103 transitions, 1343 flow. Second operand 8 states and 935 transitions. [2023-09-01 08:28:17,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 122 transitions, 1761 flow [2023-09-01 08:28:17,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 122 transitions, 1579 flow, removed 53 selfloop flow, removed 13 redundant places. [2023-09-01 08:28:17,383 INFO L231 Difference]: Finished difference. Result has 91 places, 106 transitions, 1280 flow [2023-09-01 08:28:17,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1280, PETRI_PLACES=91, PETRI_TRANSITIONS=106} [2023-09-01 08:28:17,384 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 60 predicate places. [2023-09-01 08:28:17,384 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 106 transitions, 1280 flow [2023-09-01 08:28:17,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 113.77777777777777) internal successors, (2048), 18 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:17,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:28:17,385 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:28:17,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 08:28:17,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:28:17,590 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:28:17,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:28:17,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1234431, now seen corresponding path program 2 times [2023-09-01 08:28:17,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:28:17,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596077292] [2023-09-01 08:28:17,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:28:17,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:28:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:28:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:18,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:28:18,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596077292] [2023-09-01 08:28:18,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596077292] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:28:18,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939758319] [2023-09-01 08:28:18,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:28:18,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:28:18,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:28:18,573 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) [2023-09-01 08:28:18,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 08:28:18,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:28:18,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:28:18,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 08:28:18,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:28:18,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:28:18,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2023-09-01 08:28:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:28:18,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:28:18,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939758319] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:28:18,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:28:18,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2023-09-01 08:28:18,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592402934] [2023-09-01 08:28:18,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:28:18,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 08:28:18,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:28:18,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 08:28:18,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-09-01 08:28:18,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 277 [2023-09-01 08:28:18,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 106 transitions, 1280 flow. Second operand has 6 states, 6 states have (on average 108.33333333333333) internal successors, (650), 6 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:18,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:28:18,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 277 [2023-09-01 08:28:18,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:28:18,993 INFO L130 PetriNetUnfolder]: 357/785 cut-off events. [2023-09-01 08:28:18,993 INFO L131 PetriNetUnfolder]: For 5671/5681 co-relation queries the response was YES. [2023-09-01 08:28:18,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4796 conditions, 785 events. 357/785 cut-off events. For 5671/5681 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4445 event pairs, 91 based on Foata normal form. 12/794 useless extension candidates. Maximal degree in co-relation 4760. Up to 722 conditions per place. [2023-09-01 08:28:18,997 INFO L137 encePairwiseOnDemand]: 273/277 looper letters, 91 selfloop transitions, 8 changer transitions 6/111 dead transitions. [2023-09-01 08:28:18,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 111 transitions, 1495 flow [2023-09-01 08:28:18,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:28:18,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:28:18,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 453 transitions. [2023-09-01 08:28:18,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40884476534296027 [2023-09-01 08:28:18,999 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 453 transitions. [2023-09-01 08:28:18,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 453 transitions. [2023-09-01 08:28:18,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:28:18,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 453 transitions. [2023-09-01 08:28:19,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.25) internal successors, (453), 4 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:19,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 277.0) internal successors, (1385), 5 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:19,001 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 277.0) internal successors, (1385), 5 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:19,001 INFO L175 Difference]: Start difference. First operand has 91 places, 106 transitions, 1280 flow. Second operand 4 states and 453 transitions. [2023-09-01 08:28:19,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 111 transitions, 1495 flow [2023-09-01 08:28:19,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 111 transitions, 1478 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-09-01 08:28:19,016 INFO L231 Difference]: Finished difference. Result has 89 places, 103 transitions, 1241 flow [2023-09-01 08:28:19,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1241, PETRI_PLACES=89, PETRI_TRANSITIONS=103} [2023-09-01 08:28:19,017 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 58 predicate places. [2023-09-01 08:28:19,017 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 103 transitions, 1241 flow [2023-09-01 08:28:19,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 108.33333333333333) internal successors, (650), 6 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:19,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:28:19,018 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:28:19,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 08:28:19,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:28:19,223 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:28:19,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:28:19,223 INFO L85 PathProgramCache]: Analyzing trace with hash -207559473, now seen corresponding path program 1 times [2023-09-01 08:28:19,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:28:19,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932693724] [2023-09-01 08:28:19,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:28:19,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:28:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:28:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:19,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:28:19,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932693724] [2023-09-01 08:28:19,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932693724] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:28:19,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083421124] [2023-09-01 08:28:19,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:28:19,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:28:19,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:28:19,764 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) [2023-09-01 08:28:19,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 08:28:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:28:19,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 50 conjunts are in the unsatisfiable core [2023-09-01 08:28:19,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:28:20,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:28:20,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2023-09-01 08:28:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:20,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:28:20,236 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_651 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_651) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ c_~s~0 (select .cse0 (+ .cse1 c_~q~0.offset 4)) (select .cse0 (+ .cse1 c_~q~0.offset)))) 2147483648)) is different from false [2023-09-01 08:28:20,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:28:20,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 79 [2023-09-01 08:28:20,361 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:28:20,361 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 19 treesize of output 6 [2023-09-01 08:28:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:20,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083421124] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:28:20,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:28:20,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-09-01 08:28:20,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281531251] [2023-09-01 08:28:20,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:28:20,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 08:28:20,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:28:20,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 08:28:20,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=596, Unknown=1, NotChecked=50, Total=756 [2023-09-01 08:28:20,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 277 [2023-09-01 08:28:20,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 103 transitions, 1241 flow. Second operand has 28 states, 28 states have (on average 73.28571428571429) internal successors, (2052), 28 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:20,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:28:20,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 277 [2023-09-01 08:28:20,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:28:23,957 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] [2023-09-01 08:28:25,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:28:28,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:28:28,930 INFO L130 PetriNetUnfolder]: 484/1004 cut-off events. [2023-09-01 08:28:28,930 INFO L131 PetriNetUnfolder]: For 6857/6858 co-relation queries the response was YES. [2023-09-01 08:28:28,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6219 conditions, 1004 events. 484/1004 cut-off events. For 6857/6858 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5770 event pairs, 22 based on Foata normal form. 27/1031 useless extension candidates. Maximal degree in co-relation 6183. Up to 359 conditions per place. [2023-09-01 08:28:28,935 INFO L137 encePairwiseOnDemand]: 264/277 looper letters, 108 selfloop transitions, 110 changer transitions 1/220 dead transitions. [2023-09-01 08:28:28,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 220 transitions, 2694 flow [2023-09-01 08:28:28,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 08:28:28,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 08:28:28,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2232 transitions. [2023-09-01 08:28:28,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.277853852856965 [2023-09-01 08:28:28,938 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2232 transitions. [2023-09-01 08:28:28,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2232 transitions. [2023-09-01 08:28:28,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:28:28,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2232 transitions. [2023-09-01 08:28:28,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 76.96551724137932) internal successors, (2232), 29 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:28,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 277.0) internal successors, (8310), 30 states have internal predecessors, (8310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:28,948 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 277.0) internal successors, (8310), 30 states have internal predecessors, (8310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:28,948 INFO L175 Difference]: Start difference. First operand has 89 places, 103 transitions, 1241 flow. Second operand 29 states and 2232 transitions. [2023-09-01 08:28:28,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 220 transitions, 2694 flow [2023-09-01 08:28:28,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 220 transitions, 2616 flow, removed 30 selfloop flow, removed 4 redundant places. [2023-09-01 08:28:28,966 INFO L231 Difference]: Finished difference. Result has 122 places, 157 transitions, 2273 flow [2023-09-01 08:28:28,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2273, PETRI_PLACES=122, PETRI_TRANSITIONS=157} [2023-09-01 08:28:28,967 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 91 predicate places. [2023-09-01 08:28:28,967 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 157 transitions, 2273 flow [2023-09-01 08:28:28,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 73.28571428571429) internal successors, (2052), 28 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:28,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:28:28,967 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:28:28,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 08:28:29,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:28:29,177 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:28:29,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:28:29,177 INFO L85 PathProgramCache]: Analyzing trace with hash -207559517, now seen corresponding path program 1 times [2023-09-01 08:28:29,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:28:29,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417763833] [2023-09-01 08:28:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:28:29,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:28:29,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:28:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:29,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:28:29,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417763833] [2023-09-01 08:28:29,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417763833] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:28:29,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28998921] [2023-09-01 08:28:29,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:28:29,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:28:29,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:28:29,593 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) [2023-09-01 08:28:29,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 08:28:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:28:29,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 53 conjunts are in the unsatisfiable core [2023-09-01 08:28:29,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:28:29,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:28:29,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:28:29,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2023-09-01 08:28:29,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:28:29,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2023-09-01 08:28:30,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:30,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:28:30,367 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:28:30,368 INFO L350 Elim1Store]: Elim1 eliminated variable 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 88 treesize of output 64 [2023-09-01 08:28:30,386 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:28:30,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 159 treesize of output 170 [2023-09-01 08:28:30,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 71 [2023-09-01 08:28:30,407 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:28:30,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 65 [2023-09-01 08:28:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:30,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28998921] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:28:30,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:28:30,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-09-01 08:28:30,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937210500] [2023-09-01 08:28:30,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:28:30,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 08:28:30,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:28:31,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 08:28:31,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=644, Unknown=4, NotChecked=0, Total=756 [2023-09-01 08:28:33,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:28:35,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:28:38,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:28:38,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 277 [2023-09-01 08:28:38,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 157 transitions, 2273 flow. Second operand has 28 states, 28 states have (on average 73.28571428571429) internal successors, (2052), 28 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:38,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:28:38,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 277 [2023-09-01 08:28:38,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:28:41,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:28:43,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:28:45,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:28:47,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:28:49,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:28:50,733 INFO L130 PetriNetUnfolder]: 498/1030 cut-off events. [2023-09-01 08:28:50,733 INFO L131 PetriNetUnfolder]: For 9783/9784 co-relation queries the response was YES. [2023-09-01 08:28:50,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7402 conditions, 1030 events. 498/1030 cut-off events. For 9783/9784 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5980 event pairs, 68 based on Foata normal form. 31/1061 useless extension candidates. Maximal degree in co-relation 7356. Up to 622 conditions per place. [2023-09-01 08:28:50,741 INFO L137 encePairwiseOnDemand]: 266/277 looper letters, 120 selfloop transitions, 98 changer transitions 0/219 dead transitions. [2023-09-01 08:28:50,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 219 transitions, 3221 flow [2023-09-01 08:28:50,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 08:28:50,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 08:28:50,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1988 transitions. [2023-09-01 08:28:50,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2760344348792002 [2023-09-01 08:28:50,744 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1988 transitions. [2023-09-01 08:28:50,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1988 transitions. [2023-09-01 08:28:50,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:28:50,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1988 transitions. [2023-09-01 08:28:50,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 76.46153846153847) internal successors, (1988), 26 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:50,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 277.0) internal successors, (7479), 27 states have internal predecessors, (7479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:50,753 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 277.0) internal successors, (7479), 27 states have internal predecessors, (7479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:50,754 INFO L175 Difference]: Start difference. First operand has 122 places, 157 transitions, 2273 flow. Second operand 26 states and 1988 transitions. [2023-09-01 08:28:50,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 219 transitions, 3221 flow [2023-09-01 08:28:50,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 219 transitions, 2878 flow, removed 158 selfloop flow, removed 8 redundant places. [2023-09-01 08:28:50,794 INFO L231 Difference]: Finished difference. Result has 146 places, 173 transitions, 2552 flow [2023-09-01 08:28:50,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2552, PETRI_PLACES=146, PETRI_TRANSITIONS=173} [2023-09-01 08:28:50,795 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 115 predicate places. [2023-09-01 08:28:50,795 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 173 transitions, 2552 flow [2023-09-01 08:28:50,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 73.28571428571429) internal successors, (2052), 28 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:50,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:28:50,796 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:28:50,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 08:28:51,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:28:51,001 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:28:51,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:28:51,002 INFO L85 PathProgramCache]: Analyzing trace with hash -322076077, now seen corresponding path program 2 times [2023-09-01 08:28:51,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:28:51,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668816794] [2023-09-01 08:28:51,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:28:51,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:28:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:28:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:51,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:28:51,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668816794] [2023-09-01 08:28:51,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668816794] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:28:51,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316518536] [2023-09-01 08:28:51,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:28:51,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:28:51,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:28:51,499 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) [2023-09-01 08:28:51,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 08:28:51,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:28:51,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:28:51,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 39 conjunts are in the unsatisfiable core [2023-09-01 08:28:51,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:28:51,651 INFO L350 Elim1Store]: Elim1 eliminated variable 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 [2023-09-01 08:28:51,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:28:51,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:28:51,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 08:28:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:51,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:28:51,891 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_727 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_727) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 1)) is different from false [2023-09-01 08:28:52,054 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:28:52,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 46 [2023-09-01 08:28:52,062 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:28:52,062 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 186 treesize of output 170 [2023-09-01 08:28:52,075 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:28:52,076 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 53 treesize of output 50 [2023-09-01 08:28:52,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2023-09-01 08:28:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:52,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316518536] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:28:52,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:28:52,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-09-01 08:28:52,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728135272] [2023-09-01 08:28:52,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:28:52,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 08:28:52,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:28:52,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 08:28:52,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=505, Unknown=1, NotChecked=46, Total=650 [2023-09-01 08:28:52,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 277 [2023-09-01 08:28:52,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 173 transitions, 2552 flow. Second operand has 26 states, 26 states have (on average 81.26923076923077) internal successors, (2113), 26 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:52,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:28:52,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 277 [2023-09-01 08:28:52,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:28:53,178 INFO L130 PetriNetUnfolder]: 363/761 cut-off events. [2023-09-01 08:28:53,178 INFO L131 PetriNetUnfolder]: For 8710/8723 co-relation queries the response was YES. [2023-09-01 08:28:53,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5436 conditions, 761 events. 363/761 cut-off events. For 8710/8723 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4188 event pairs, 105 based on Foata normal form. 24/778 useless extension candidates. Maximal degree in co-relation 5384. Up to 584 conditions per place. [2023-09-01 08:28:53,182 INFO L137 encePairwiseOnDemand]: 270/277 looper letters, 141 selfloop transitions, 20 changer transitions 15/183 dead transitions. [2023-09-01 08:28:53,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 183 transitions, 2819 flow [2023-09-01 08:28:53,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 08:28:53,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 08:28:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1014 transitions. [2023-09-01 08:28:53,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30505415162454874 [2023-09-01 08:28:53,185 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1014 transitions. [2023-09-01 08:28:53,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1014 transitions. [2023-09-01 08:28:53,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:28:53,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1014 transitions. [2023-09-01 08:28:53,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 84.5) internal successors, (1014), 12 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:53,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 277.0) internal successors, (3601), 13 states have internal predecessors, (3601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:53,189 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 277.0) internal successors, (3601), 13 states have internal predecessors, (3601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:53,189 INFO L175 Difference]: Start difference. First operand has 146 places, 173 transitions, 2552 flow. Second operand 12 states and 1014 transitions. [2023-09-01 08:28:53,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 183 transitions, 2819 flow [2023-09-01 08:28:53,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 183 transitions, 2652 flow, removed 51 selfloop flow, removed 15 redundant places. [2023-09-01 08:28:53,210 INFO L231 Difference]: Finished difference. Result has 142 places, 156 transitions, 2107 flow [2023-09-01 08:28:53,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=2210, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2107, PETRI_PLACES=142, PETRI_TRANSITIONS=156} [2023-09-01 08:28:53,211 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 111 predicate places. [2023-09-01 08:28:53,211 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 156 transitions, 2107 flow [2023-09-01 08:28:53,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 81.26923076923077) internal successors, (2113), 26 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:53,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:28:53,211 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:28:53,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 08:28:53,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-09-01 08:28:53,412 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:28:53,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:28:53,412 INFO L85 PathProgramCache]: Analyzing trace with hash -444421173, now seen corresponding path program 2 times [2023-09-01 08:28:53,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:28:53,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516602906] [2023-09-01 08:28:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:28:53,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:28:53,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:28:53,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:53,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:28:53,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516602906] [2023-09-01 08:28:53,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516602906] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:28:53,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463472263] [2023-09-01 08:28:53,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:28:53,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:28:53,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:28:53,915 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) [2023-09-01 08:28:53,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 08:28:54,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:28:54,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:28:54,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 40 conjunts are in the unsatisfiable core [2023-09-01 08:28:54,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:28:54,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:28:54,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 08:28:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:28:54,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:28:54,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:28:54,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 100 [2023-09-01 08:28:54,398 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:28:54,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 47 [2023-09-01 08:28:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:28:54,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463472263] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:28:54,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:28:54,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 23 [2023-09-01 08:28:54,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381369951] [2023-09-01 08:28:54,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:28:54,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 08:28:54,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:28:54,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 08:28:54,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=519, Unknown=3, NotChecked=0, Total=600 [2023-09-01 08:28:56,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 277 [2023-09-01 08:28:56,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 156 transitions, 2107 flow. Second operand has 25 states, 25 states have (on average 73.4) internal successors, (1835), 25 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:56,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:28:56,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 277 [2023-09-01 08:28:56,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:29:00,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:29:15,947 WARN L222 SmtUtils]: Spent 8.19s on a formula simplification. DAG size of input: 57 DAG size of output: 55 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:29:18,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:29:18,253 INFO L130 PetriNetUnfolder]: 561/1051 cut-off events. [2023-09-01 08:29:18,253 INFO L131 PetriNetUnfolder]: For 9375/9376 co-relation queries the response was YES. [2023-09-01 08:29:18,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7549 conditions, 1051 events. 561/1051 cut-off events. For 9375/9376 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5440 event pairs, 2 based on Foata normal form. 19/1063 useless extension candidates. Maximal degree in co-relation 7500. Up to 321 conditions per place. [2023-09-01 08:29:18,259 INFO L137 encePairwiseOnDemand]: 267/277 looper letters, 105 selfloop transitions, 181 changer transitions 10/297 dead transitions. [2023-09-01 08:29:18,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 297 transitions, 4315 flow [2023-09-01 08:29:18,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 08:29:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 08:29:18,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2522 transitions. [2023-09-01 08:29:18,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2758997921452795 [2023-09-01 08:29:18,262 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2522 transitions. [2023-09-01 08:29:18,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2522 transitions. [2023-09-01 08:29:18,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:29:18,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2522 transitions. [2023-09-01 08:29:18,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 76.42424242424242) internal successors, (2522), 33 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:18,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 277.0) internal successors, (9418), 34 states have internal predecessors, (9418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:18,274 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 277.0) internal successors, (9418), 34 states have internal predecessors, (9418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:18,275 INFO L175 Difference]: Start difference. First operand has 142 places, 156 transitions, 2107 flow. Second operand 33 states and 2522 transitions. [2023-09-01 08:29:18,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 297 transitions, 4315 flow [2023-09-01 08:29:18,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 297 transitions, 4250 flow, removed 11 selfloop flow, removed 9 redundant places. [2023-09-01 08:29:18,302 INFO L231 Difference]: Finished difference. Result has 167 places, 228 transitions, 3758 flow [2023-09-01 08:29:18,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3758, PETRI_PLACES=167, PETRI_TRANSITIONS=228} [2023-09-01 08:29:18,302 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 136 predicate places. [2023-09-01 08:29:18,302 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 228 transitions, 3758 flow [2023-09-01 08:29:18,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 73.4) internal successors, (1835), 25 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:18,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:29:18,303 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:29:18,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 08:29:18,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-09-01 08:29:18,509 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:29:18,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:29:18,509 INFO L85 PathProgramCache]: Analyzing trace with hash 172323129, now seen corresponding path program 2 times [2023-09-01 08:29:18,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:29:18,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758673022] [2023-09-01 08:29:18,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:29:18,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:29:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:29:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:29:18,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:29:18,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758673022] [2023-09-01 08:29:18,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758673022] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:29:18,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025793886] [2023-09-01 08:29:18,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:29:18,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:29:18,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:29:18,826 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) [2023-09-01 08:29:18,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 08:29:18,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:29:18,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:29:18,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 55 conjunts are in the unsatisfiable core [2023-09-01 08:29:18,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:29:18,979 INFO L350 Elim1Store]: Elim1 eliminated variable 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 [2023-09-01 08:29:19,016 INFO L350 Elim1Store]: Elim1 eliminated variable 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 [2023-09-01 08:29:19,071 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-09-01 08:29:19,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2023-09-01 08:29:19,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:29:19,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2023-09-01 08:29:19,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:29:19,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2023-09-01 08:29:19,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:29:19,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:29:20,226 INFO L321 Elim1Store]: treesize reduction 52, result has 49.5 percent of original size [2023-09-01 08:29:20,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 105 [2023-09-01 08:29:20,271 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:29:20,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 430 treesize of output 442 [2023-09-01 08:29:20,304 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:29:20,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 107 treesize of output 106 [2023-09-01 08:29:20,327 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:29:20,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 93 [2023-09-01 08:29:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:29:22,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025793886] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:29:22,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:29:22,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2023-09-01 08:29:22,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681423409] [2023-09-01 08:29:22,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:29:22,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 08:29:22,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:29:22,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 08:29:22,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=892, Unknown=7, NotChecked=0, Total=1056 [2023-09-01 08:29:23,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 277 [2023-09-01 08:29:23,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 228 transitions, 3758 flow. Second operand has 33 states, 33 states have (on average 73.27272727272727) internal successors, (2418), 33 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:23,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:29:23,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 277 [2023-09-01 08:29:23,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:29:27,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:29:29,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:29:35,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:29:45,460 WARN L222 SmtUtils]: Spent 6.54s on a formula simplification. DAG size of input: 88 DAG size of output: 74 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:29:48,388 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] [2023-09-01 08:29:48,929 INFO L130 PetriNetUnfolder]: 1034/1906 cut-off events. [2023-09-01 08:29:48,930 INFO L131 PetriNetUnfolder]: For 28148/28148 co-relation queries the response was YES. [2023-09-01 08:29:48,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16324 conditions, 1906 events. 1034/1906 cut-off events. For 28148/28148 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11107 event pairs, 76 based on Foata normal form. 104/2006 useless extension candidates. Maximal degree in co-relation 16267. Up to 795 conditions per place. [2023-09-01 08:29:48,941 INFO L137 encePairwiseOnDemand]: 266/277 looper letters, 223 selfloop transitions, 306 changer transitions 0/530 dead transitions. [2023-09-01 08:29:48,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 530 transitions, 9260 flow [2023-09-01 08:29:48,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-09-01 08:29:48,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-09-01 08:29:48,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3797 transitions. [2023-09-01 08:29:48,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.279746555661976 [2023-09-01 08:29:48,945 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3797 transitions. [2023-09-01 08:29:48,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3797 transitions. [2023-09-01 08:29:48,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:29:48,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3797 transitions. [2023-09-01 08:29:48,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 77.48979591836735) internal successors, (3797), 49 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:48,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 277.0) internal successors, (13850), 50 states have internal predecessors, (13850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:48,959 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 277.0) internal successors, (13850), 50 states have internal predecessors, (13850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:48,959 INFO L175 Difference]: Start difference. First operand has 167 places, 228 transitions, 3758 flow. Second operand 49 states and 3797 transitions. [2023-09-01 08:29:48,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 530 transitions, 9260 flow [2023-09-01 08:29:49,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 530 transitions, 7876 flow, removed 588 selfloop flow, removed 18 redundant places. [2023-09-01 08:29:49,052 INFO L231 Difference]: Finished difference. Result has 205 places, 422 transitions, 7350 flow [2023-09-01 08:29:49,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=3017, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=7350, PETRI_PLACES=205, PETRI_TRANSITIONS=422} [2023-09-01 08:29:49,053 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 174 predicate places. [2023-09-01 08:29:49,053 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 422 transitions, 7350 flow [2023-09-01 08:29:49,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 73.27272727272727) internal successors, (2418), 33 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:49,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:29:49,054 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:29:49,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 08:29:49,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-09-01 08:29:49,254 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:29:49,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:29:49,254 INFO L85 PathProgramCache]: Analyzing trace with hash 586337123, now seen corresponding path program 3 times [2023-09-01 08:29:49,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:29:49,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470717925] [2023-09-01 08:29:49,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:29:49,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:29:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:29:49,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:29:49,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:29:49,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470717925] [2023-09-01 08:29:49,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470717925] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:29:49,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54963308] [2023-09-01 08:29:49,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:29:49,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:29:49,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:29:49,594 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) [2023-09-01 08:29:49,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 08:29:49,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 08:29:49,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:29:49,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 08:29:49,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:29:49,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:29:49,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:29:49,802 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 08:29:49,802 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 25 treesize of output 13 [2023-09-01 08:29:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:29:49,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54963308] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:29:49,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:29:49,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 14 [2023-09-01 08:29:49,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443455453] [2023-09-01 08:29:49,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:29:49,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 08:29:49,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:29:49,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 08:29:49,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-09-01 08:29:50,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 277 [2023-09-01 08:29:50,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 422 transitions, 7350 flow. Second operand has 16 states, 16 states have (on average 105.5625) internal successors, (1689), 16 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:50,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:29:50,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 277 [2023-09-01 08:29:50,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:29:50,603 INFO L130 PetriNetUnfolder]: 1035/1927 cut-off events. [2023-09-01 08:29:50,604 INFO L131 PetriNetUnfolder]: For 26726/26738 co-relation queries the response was YES. [2023-09-01 08:29:50,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15859 conditions, 1927 events. 1035/1927 cut-off events. For 26726/26738 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 11329 event pairs, 155 based on Foata normal form. 35/1949 useless extension candidates. Maximal degree in co-relation 15791. Up to 1566 conditions per place. [2023-09-01 08:29:50,615 INFO L137 encePairwiseOnDemand]: 268/277 looper letters, 368 selfloop transitions, 85 changer transitions 0/462 dead transitions. [2023-09-01 08:29:50,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 462 transitions, 8548 flow [2023-09-01 08:29:50,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 08:29:50,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 08:29:50,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1639 transitions. [2023-09-01 08:29:50,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3944645006016847 [2023-09-01 08:29:50,617 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1639 transitions. [2023-09-01 08:29:50,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1639 transitions. [2023-09-01 08:29:50,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:29:50,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1639 transitions. [2023-09-01 08:29:50,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 109.26666666666667) internal successors, (1639), 15 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:50,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 277.0) internal successors, (4432), 16 states have internal predecessors, (4432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:50,622 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 277.0) internal successors, (4432), 16 states have internal predecessors, (4432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:50,622 INFO L175 Difference]: Start difference. First operand has 205 places, 422 transitions, 7350 flow. Second operand 15 states and 1639 transitions. [2023-09-01 08:29:50,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 462 transitions, 8548 flow [2023-09-01 08:29:50,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 462 transitions, 7166 flow, removed 669 selfloop flow, removed 11 redundant places. [2023-09-01 08:29:50,753 INFO L231 Difference]: Finished difference. Result has 211 places, 434 transitions, 6382 flow [2023-09-01 08:29:50,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=5970, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6382, PETRI_PLACES=211, PETRI_TRANSITIONS=434} [2023-09-01 08:29:50,753 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 180 predicate places. [2023-09-01 08:29:50,753 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 434 transitions, 6382 flow [2023-09-01 08:29:50,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 105.5625) internal successors, (1689), 16 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:50,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:29:50,754 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:29:50,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 08:29:50,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:29:50,954 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:29:50,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:29:50,955 INFO L85 PathProgramCache]: Analyzing trace with hash 586456243, now seen corresponding path program 3 times [2023-09-01 08:29:50,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:29:50,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732201546] [2023-09-01 08:29:50,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:29:50,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:29:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:29:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:29:51,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:29:51,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732201546] [2023-09-01 08:29:51,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732201546] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:29:51,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069008872] [2023-09-01 08:29:51,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:29:51,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:29:51,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:29:51,668 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) [2023-09-01 08:29:51,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 08:29:51,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 08:29:51,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:29:51,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 08:29:51,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:29:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:29:51,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:29:51,981 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 08:29:51,983 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 27 treesize of output 15 [2023-09-01 08:29:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:29:52,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069008872] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:29:52,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:29:52,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 4] total 18 [2023-09-01 08:29:52,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506391901] [2023-09-01 08:29:52,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:29:52,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 08:29:52,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:29:52,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 08:29:52,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2023-09-01 08:29:52,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 277 [2023-09-01 08:29:52,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 434 transitions, 6382 flow. Second operand has 20 states, 20 states have (on average 99.75) internal successors, (1995), 20 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:52,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:29:52,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 277 [2023-09-01 08:29:52,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:29:54,058 INFO L130 PetriNetUnfolder]: 1122/2074 cut-off events. [2023-09-01 08:29:54,058 INFO L131 PetriNetUnfolder]: For 22900/22900 co-relation queries the response was YES. [2023-09-01 08:29:54,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14903 conditions, 2074 events. 1122/2074 cut-off events. For 22900/22900 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 12134 event pairs, 153 based on Foata normal form. 38/2055 useless extension candidates. Maximal degree in co-relation 14832. Up to 1256 conditions per place. [2023-09-01 08:29:54,070 INFO L137 encePairwiseOnDemand]: 267/277 looper letters, 327 selfloop transitions, 167 changer transitions 21/516 dead transitions. [2023-09-01 08:29:54,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 516 transitions, 8206 flow [2023-09-01 08:29:54,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 08:29:54,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 08:29:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2275 transitions. [2023-09-01 08:29:54,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37331801772234985 [2023-09-01 08:29:54,074 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2275 transitions. [2023-09-01 08:29:54,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2275 transitions. [2023-09-01 08:29:54,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:29:54,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2275 transitions. [2023-09-01 08:29:54,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 103.4090909090909) internal successors, (2275), 22 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:54,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 277.0) internal successors, (6371), 23 states have internal predecessors, (6371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:54,080 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 277.0) internal successors, (6371), 23 states have internal predecessors, (6371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:54,080 INFO L175 Difference]: Start difference. First operand has 211 places, 434 transitions, 6382 flow. Second operand 22 states and 2275 transitions. [2023-09-01 08:29:54,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 516 transitions, 8206 flow [2023-09-01 08:29:54,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 516 transitions, 8002 flow, removed 15 selfloop flow, removed 11 redundant places. [2023-09-01 08:29:54,201 INFO L231 Difference]: Finished difference. Result has 224 places, 441 transitions, 6759 flow [2023-09-01 08:29:54,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=6112, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6759, PETRI_PLACES=224, PETRI_TRANSITIONS=441} [2023-09-01 08:29:54,202 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 193 predicate places. [2023-09-01 08:29:54,202 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 441 transitions, 6759 flow [2023-09-01 08:29:54,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 99.75) internal successors, (1995), 20 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:54,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:29:54,202 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:29:54,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-09-01 08:29:54,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-09-01 08:29:54,408 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:29:54,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:29:54,408 INFO L85 PathProgramCache]: Analyzing trace with hash 587050933, now seen corresponding path program 3 times [2023-09-01 08:29:54,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:29:54,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784130092] [2023-09-01 08:29:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:29:54,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:29:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:29:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:29:54,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:29:54,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784130092] [2023-09-01 08:29:54,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784130092] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:29:54,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910232384] [2023-09-01 08:29:54,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:29:54,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:29:54,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:29:54,957 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:29:54,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 08:29:55,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 08:29:55,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:29:55,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 08:29:55,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:29:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:29:55,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:29:55,285 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:29:55,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 51 [2023-09-01 08:29:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:29:55,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910232384] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:29:55,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:29:55,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 16 [2023-09-01 08:29:55,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262031109] [2023-09-01 08:29:55,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:29:55,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 08:29:55,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:29:55,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 08:29:55,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-09-01 08:29:55,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 277 [2023-09-01 08:29:55,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 441 transitions, 6759 flow. Second operand has 18 states, 18 states have (on average 105.77777777777777) internal successors, (1904), 18 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:55,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:29:55,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 277 [2023-09-01 08:29:55,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:29:56,813 INFO L130 PetriNetUnfolder]: 1178/2159 cut-off events. [2023-09-01 08:29:56,813 INFO L131 PetriNetUnfolder]: For 25894/25903 co-relation queries the response was YES. [2023-09-01 08:29:56,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15960 conditions, 2159 events. 1178/2159 cut-off events. For 25894/25903 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 12783 event pairs, 324 based on Foata normal form. 43/2142 useless extension candidates. Maximal degree in co-relation 15888. Up to 1686 conditions per place. [2023-09-01 08:29:56,827 INFO L137 encePairwiseOnDemand]: 268/277 looper letters, 412 selfloop transitions, 113 changer transitions 1/535 dead transitions. [2023-09-01 08:29:56,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 535 transitions, 8887 flow [2023-09-01 08:29:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 08:29:56,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 08:29:56,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2183 transitions. [2023-09-01 08:29:56,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.394043321299639 [2023-09-01 08:29:56,830 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2183 transitions. [2023-09-01 08:29:56,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2183 transitions. [2023-09-01 08:29:56,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:29:56,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2183 transitions. [2023-09-01 08:29:56,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 109.15) internal successors, (2183), 20 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:56,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 277.0) internal successors, (5817), 21 states have internal predecessors, (5817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:56,835 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 277.0) internal successors, (5817), 21 states have internal predecessors, (5817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:56,835 INFO L175 Difference]: Start difference. First operand has 224 places, 441 transitions, 6759 flow. Second operand 20 states and 2183 transitions. [2023-09-01 08:29:56,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 535 transitions, 8887 flow [2023-09-01 08:29:56,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 535 transitions, 8408 flow, removed 139 selfloop flow, removed 19 redundant places. [2023-09-01 08:29:56,981 INFO L231 Difference]: Finished difference. Result has 227 places, 475 transitions, 7234 flow [2023-09-01 08:29:56,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=6332, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7234, PETRI_PLACES=227, PETRI_TRANSITIONS=475} [2023-09-01 08:29:56,982 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 196 predicate places. [2023-09-01 08:29:56,983 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 475 transitions, 7234 flow [2023-09-01 08:29:56,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 105.77777777777777) internal successors, (1904), 18 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:56,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:29:56,983 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:29:56,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-09-01 08:29:57,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 08:29:57,185 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:29:57,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:29:57,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1941623111, now seen corresponding path program 1 times [2023-09-01 08:29:57,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:29:57,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989269748] [2023-09-01 08:29:57,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:29:57,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:29:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:29:57,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:29:57,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:29:57,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989269748] [2023-09-01 08:29:57,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989269748] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:29:57,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171205178] [2023-09-01 08:29:57,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:29:57,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:29:57,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:29:57,773 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:29:57,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 08:29:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:29:57,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 08:29:57,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:29:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:29:57,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:29:57,974 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:29:57,974 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 27 treesize of output 19 [2023-09-01 08:29:58,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:29:58,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171205178] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:29:58,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:29:58,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 4] total 15 [2023-09-01 08:29:58,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764560304] [2023-09-01 08:29:58,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:29:58,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 08:29:58,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:29:58,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 08:29:58,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-09-01 08:29:58,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 277 [2023-09-01 08:29:58,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 475 transitions, 7234 flow. Second operand has 17 states, 17 states have (on average 100.52941176470588) internal successors, (1709), 17 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:58,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:29:58,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 277 [2023-09-01 08:29:58,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:29:59,580 INFO L130 PetriNetUnfolder]: 1135/2120 cut-off events. [2023-09-01 08:29:59,580 INFO L131 PetriNetUnfolder]: For 25166/25172 co-relation queries the response was YES. [2023-09-01 08:29:59,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15388 conditions, 2120 events. 1135/2120 cut-off events. For 25166/25172 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 12816 event pairs, 169 based on Foata normal form. 121/2190 useless extension candidates. Maximal degree in co-relation 15313. Up to 1475 conditions per place. [2023-09-01 08:29:59,595 INFO L137 encePairwiseOnDemand]: 268/277 looper letters, 358 selfloop transitions, 158 changer transitions 10/535 dead transitions. [2023-09-01 08:29:59,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 535 transitions, 8719 flow [2023-09-01 08:29:59,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 08:29:59,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 08:29:59,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2402 transitions. [2023-09-01 08:29:59,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3770208758436666 [2023-09-01 08:29:59,597 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2402 transitions. [2023-09-01 08:29:59,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2402 transitions. [2023-09-01 08:29:59,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:29:59,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2402 transitions. [2023-09-01 08:29:59,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 104.43478260869566) internal successors, (2402), 23 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:59,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 277.0) internal successors, (6648), 24 states have internal predecessors, (6648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:59,604 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 277.0) internal successors, (6648), 24 states have internal predecessors, (6648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:59,604 INFO L175 Difference]: Start difference. First operand has 227 places, 475 transitions, 7234 flow. Second operand 23 states and 2402 transitions. [2023-09-01 08:29:59,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 535 transitions, 8719 flow [2023-09-01 08:29:59,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 535 transitions, 8619 flow, removed 16 selfloop flow, removed 11 redundant places. [2023-09-01 08:29:59,731 INFO L231 Difference]: Finished difference. Result has 239 places, 465 transitions, 7273 flow [2023-09-01 08:29:59,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=6766, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7273, PETRI_PLACES=239, PETRI_TRANSITIONS=465} [2023-09-01 08:29:59,732 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 208 predicate places. [2023-09-01 08:29:59,732 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 465 transitions, 7273 flow [2023-09-01 08:29:59,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 100.52941176470588) internal successors, (1709), 17 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:29:59,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:29:59,732 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:29:59,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-09-01 08:29:59,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:29:59,933 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:29:59,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:29:59,933 INFO L85 PathProgramCache]: Analyzing trace with hash 582852537, now seen corresponding path program 4 times [2023-09-01 08:29:59,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:29:59,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601728304] [2023-09-01 08:29:59,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:29:59,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:29:59,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:30:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:30:00,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:30:00,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601728304] [2023-09-01 08:30:00,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601728304] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:30:00,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309959709] [2023-09-01 08:30:00,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:30:00,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:30:00,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:30:00,680 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:30:00,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 08:30:00,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:30:00,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:30:00,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 42 conjunts are in the unsatisfiable core [2023-09-01 08:30:00,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:30:00,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:30:00,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 08:30:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:30:01,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:30:01,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:30:01,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 100 [2023-09-01 08:30:01,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:30:01,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 47 [2023-09-01 08:30:01,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:30:01,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309959709] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:30:01,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:30:01,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 25 [2023-09-01 08:30:01,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990884137] [2023-09-01 08:30:01,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:30:01,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 08:30:01,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:30:01,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 08:30:01,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=614, Unknown=3, NotChecked=0, Total=702 [2023-09-01 08:30:02,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 277 [2023-09-01 08:30:02,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 465 transitions, 7273 flow. Second operand has 27 states, 27 states have (on average 76.37037037037037) internal successors, (2062), 27 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:02,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:30:02,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 277 [2023-09-01 08:30:02,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:30:09,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:30:20,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:30:22,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:30:30,252 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] [2023-09-01 08:30:38,577 WARN L222 SmtUtils]: Spent 8.10s on a formula simplification. DAG size of input: 61 DAG size of output: 58 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:30:51,033 WARN L222 SmtUtils]: Spent 8.15s on a formula simplification. DAG size of input: 57 DAG size of output: 55 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:30:51,407 INFO L130 PetriNetUnfolder]: 1224/2230 cut-off events. [2023-09-01 08:30:51,407 INFO L131 PetriNetUnfolder]: For 25597/25597 co-relation queries the response was YES. [2023-09-01 08:30:51,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16436 conditions, 2230 events. 1224/2230 cut-off events. For 25597/25597 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13038 event pairs, 2 based on Foata normal form. 42/2234 useless extension candidates. Maximal degree in co-relation 16360. Up to 652 conditions per place. [2023-09-01 08:30:51,425 INFO L137 encePairwiseOnDemand]: 267/277 looper letters, 283 selfloop transitions, 315 changer transitions 4/603 dead transitions. [2023-09-01 08:30:51,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 603 transitions, 9624 flow [2023-09-01 08:30:51,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-09-01 08:30:51,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-09-01 08:30:51,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3183 transitions. [2023-09-01 08:30:51,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2872743682310469 [2023-09-01 08:30:51,429 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3183 transitions. [2023-09-01 08:30:51,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3183 transitions. [2023-09-01 08:30:51,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:30:51,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3183 transitions. [2023-09-01 08:30:51,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 79.575) internal successors, (3183), 40 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:51,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 277.0) internal successors, (11357), 41 states have internal predecessors, (11357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:51,438 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 277.0) internal successors, (11357), 41 states have internal predecessors, (11357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:51,438 INFO L175 Difference]: Start difference. First operand has 239 places, 465 transitions, 7273 flow. Second operand 40 states and 3183 transitions. [2023-09-01 08:30:51,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 603 transitions, 9624 flow [2023-09-01 08:30:51,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 603 transitions, 9214 flow, removed 43 selfloop flow, removed 16 redundant places. [2023-09-01 08:30:51,574 INFO L231 Difference]: Finished difference. Result has 266 places, 499 transitions, 8135 flow [2023-09-01 08:30:51,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=6730, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=8135, PETRI_PLACES=266, PETRI_TRANSITIONS=499} [2023-09-01 08:30:51,575 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 235 predicate places. [2023-09-01 08:30:51,575 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 499 transitions, 8135 flow [2023-09-01 08:30:51,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 76.37037037037037) internal successors, (2062), 27 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:51,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:30:51,575 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:30:51,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-09-01 08:30:51,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:30:51,781 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:30:51,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:30:51,782 INFO L85 PathProgramCache]: Analyzing trace with hash -2139375783, now seen corresponding path program 5 times [2023-09-01 08:30:51,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:30:51,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376295570] [2023-09-01 08:30:51,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:30:51,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:30:51,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:30:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:30:51,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:30:51,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376295570] [2023-09-01 08:30:51,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376295570] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:30:51,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4397351] [2023-09-01 08:30:51,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 08:30:51,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:30:51,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:30:51,857 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:30:51,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 08:30:51,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:30:51,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:30:51,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 08:30:51,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:30:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:30:52,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:30:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:30:52,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4397351] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:30:52,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:30:52,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 18 [2023-09-01 08:30:52,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227139207] [2023-09-01 08:30:52,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:30:52,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 08:30:52,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:30:52,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 08:30:52,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2023-09-01 08:30:52,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 277 [2023-09-01 08:30:52,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 499 transitions, 8135 flow. Second operand has 20 states, 20 states have (on average 111.75) internal successors, (2235), 20 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:52,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:30:52,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 277 [2023-09-01 08:30:52,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:30:52,933 INFO L130 PetriNetUnfolder]: 1533/2817 cut-off events. [2023-09-01 08:30:52,933 INFO L131 PetriNetUnfolder]: For 37479/37484 co-relation queries the response was YES. [2023-09-01 08:30:52,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21812 conditions, 2817 events. 1533/2817 cut-off events. For 37479/37484 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 17791 event pairs, 128 based on Foata normal form. 120/2904 useless extension candidates. Maximal degree in co-relation 21736. Up to 1707 conditions per place. [2023-09-01 08:30:52,954 INFO L137 encePairwiseOnDemand]: 269/277 looper letters, 341 selfloop transitions, 262 changer transitions 40/650 dead transitions. [2023-09-01 08:30:52,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 650 transitions, 11774 flow [2023-09-01 08:30:52,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 08:30:52,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 08:30:52,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1497 transitions. [2023-09-01 08:30:52,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41571785615106915 [2023-09-01 08:30:52,956 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1497 transitions. [2023-09-01 08:30:52,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1497 transitions. [2023-09-01 08:30:52,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:30:52,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1497 transitions. [2023-09-01 08:30:52,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 115.15384615384616) internal successors, (1497), 13 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:52,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 277.0) internal successors, (3878), 14 states have internal predecessors, (3878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:52,961 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 277.0) internal successors, (3878), 14 states have internal predecessors, (3878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:52,961 INFO L175 Difference]: Start difference. First operand has 266 places, 499 transitions, 8135 flow. Second operand 13 states and 1497 transitions. [2023-09-01 08:30:52,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 650 transitions, 11774 flow [2023-09-01 08:30:53,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 650 transitions, 11396 flow, removed 102 selfloop flow, removed 20 redundant places. [2023-09-01 08:30:53,152 INFO L231 Difference]: Finished difference. Result has 260 places, 596 transitions, 10933 flow [2023-09-01 08:30:53,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=7706, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10933, PETRI_PLACES=260, PETRI_TRANSITIONS=596} [2023-09-01 08:30:53,152 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 229 predicate places. [2023-09-01 08:30:53,153 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 596 transitions, 10933 flow [2023-09-01 08:30:53,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 111.75) internal successors, (2235), 20 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:53,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:30:53,153 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:30:53,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-09-01 08:30:53,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:30:53,354 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:30:53,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:30:53,354 INFO L85 PathProgramCache]: Analyzing trace with hash 705203169, now seen corresponding path program 2 times [2023-09-01 08:30:53,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:30:53,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194024364] [2023-09-01 08:30:53,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:30:53,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:30:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:30:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:30:53,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:30:53,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194024364] [2023-09-01 08:30:53,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194024364] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:30:53,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781150632] [2023-09-01 08:30:53,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:30:53,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:30:53,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:30:53,774 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:30:53,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 08:30:53,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:30:53,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:30:53,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 08:30:53,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:30:53,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:30:53,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 08:30:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:30:54,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:30:54,095 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:30:54,095 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 48 treesize of output 41 [2023-09-01 08:30:54,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2023-09-01 08:30:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:30:54,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781150632] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:30:54,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:30:54,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 23 [2023-09-01 08:30:54,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492724279] [2023-09-01 08:30:54,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:30:54,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 08:30:54,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:30:54,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 08:30:54,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=525, Unknown=1, NotChecked=0, Total=600 [2023-09-01 08:30:54,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 277 [2023-09-01 08:30:54,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 596 transitions, 10933 flow. Second operand has 25 states, 25 states have (on average 84.36) internal successors, (2109), 25 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:54,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:30:54,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 277 [2023-09-01 08:30:54,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:30:55,146 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset 4))) (and (forall ((v_ArrVal_1074 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1074) c_~q~0.base) .cse0) 1))) (< 0 (+ (select (select |c_#memory_int| c_~q~0.base) .cse0) 1)))) is different from false [2023-09-01 08:30:55,993 INFO L130 PetriNetUnfolder]: 1712/3127 cut-off events. [2023-09-01 08:30:55,993 INFO L131 PetriNetUnfolder]: For 47904/47914 co-relation queries the response was YES. [2023-09-01 08:30:56,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26841 conditions, 3127 events. 1712/3127 cut-off events. For 47904/47914 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 20246 event pairs, 155 based on Foata normal form. 83/3182 useless extension candidates. Maximal degree in co-relation 26763. Up to 2158 conditions per place. [2023-09-01 08:30:56,015 INFO L137 encePairwiseOnDemand]: 266/277 looper letters, 534 selfloop transitions, 250 changer transitions 0/791 dead transitions. [2023-09-01 08:30:56,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 791 transitions, 15991 flow [2023-09-01 08:30:56,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 08:30:56,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 08:30:56,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1587 transitions. [2023-09-01 08:30:56,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31829121540312877 [2023-09-01 08:30:56,017 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1587 transitions. [2023-09-01 08:30:56,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1587 transitions. [2023-09-01 08:30:56,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:30:56,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1587 transitions. [2023-09-01 08:30:56,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 88.16666666666667) internal successors, (1587), 18 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:56,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 277.0) internal successors, (5263), 19 states have internal predecessors, (5263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:56,021 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 277.0) internal successors, (5263), 19 states have internal predecessors, (5263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:56,021 INFO L175 Difference]: Start difference. First operand has 260 places, 596 transitions, 10933 flow. Second operand 18 states and 1587 transitions. [2023-09-01 08:30:56,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 791 transitions, 15991 flow [2023-09-01 08:30:56,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 791 transitions, 15252 flow, removed 254 selfloop flow, removed 12 redundant places. [2023-09-01 08:30:56,299 INFO L231 Difference]: Finished difference. Result has 250 places, 696 transitions, 13387 flow [2023-09-01 08:30:56,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=10068, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=13387, PETRI_PLACES=250, PETRI_TRANSITIONS=696} [2023-09-01 08:30:56,300 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 219 predicate places. [2023-09-01 08:30:56,300 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 696 transitions, 13387 flow [2023-09-01 08:30:56,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.36) internal successors, (2109), 25 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:56,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:30:56,300 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:30:56,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-09-01 08:30:56,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:30:56,501 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:30:56,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:30:56,501 INFO L85 PathProgramCache]: Analyzing trace with hash 705203213, now seen corresponding path program 4 times [2023-09-01 08:30:56,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:30:56,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670449074] [2023-09-01 08:30:56,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:30:56,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:30:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:30:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:30:57,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:30:57,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670449074] [2023-09-01 08:30:57,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670449074] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:30:57,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23524870] [2023-09-01 08:30:57,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:30:57,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:30:57,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:30:57,021 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:30:57,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-09-01 08:30:57,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:30:57,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:30:57,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 08:30:57,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:30:57,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:30:57,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 08:30:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:30:57,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:30:57,290 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1113 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1113) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 1)) is different from false [2023-09-01 08:30:57,297 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:30:57,298 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 44 treesize of output 37 [2023-09-01 08:30:57,303 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 10 treesize of output 3 [2023-09-01 08:30:57,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:30:57,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23524870] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:30:57,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:30:57,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 21 [2023-09-01 08:30:57,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395273769] [2023-09-01 08:30:57,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:30:57,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 08:30:57,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:30:57,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 08:30:57,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=402, Unknown=1, NotChecked=40, Total=506 [2023-09-01 08:30:57,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 277 [2023-09-01 08:30:57,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 696 transitions, 13387 flow. Second operand has 23 states, 23 states have (on average 84.3913043478261) internal successors, (1941), 23 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:57,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:30:57,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 277 [2023-09-01 08:30:57,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:30:58,562 INFO L130 PetriNetUnfolder]: 1706/3115 cut-off events. [2023-09-01 08:30:58,562 INFO L131 PetriNetUnfolder]: For 48931/48939 co-relation queries the response was YES. [2023-09-01 08:30:58,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27457 conditions, 3115 events. 1706/3115 cut-off events. For 48931/48939 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20210 event pairs, 279 based on Foata normal form. 13/3096 useless extension candidates. Maximal degree in co-relation 27381. Up to 2851 conditions per place. [2023-09-01 08:30:58,584 INFO L137 encePairwiseOnDemand]: 270/277 looper letters, 630 selfloop transitions, 66 changer transitions 18/721 dead transitions. [2023-09-01 08:30:58,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 721 transitions, 14919 flow [2023-09-01 08:30:58,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 08:30:58,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 08:30:58,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1314 transitions. [2023-09-01 08:30:58,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31624548736462094 [2023-09-01 08:30:58,586 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1314 transitions. [2023-09-01 08:30:58,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1314 transitions. [2023-09-01 08:30:58,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:30:58,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1314 transitions. [2023-09-01 08:30:58,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 87.6) internal successors, (1314), 15 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:58,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 277.0) internal successors, (4432), 16 states have internal predecessors, (4432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:58,589 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 277.0) internal successors, (4432), 16 states have internal predecessors, (4432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:58,589 INFO L175 Difference]: Start difference. First operand has 250 places, 696 transitions, 13387 flow. Second operand 15 states and 1314 transitions. [2023-09-01 08:30:58,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 721 transitions, 14919 flow [2023-09-01 08:30:58,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 721 transitions, 14753 flow, removed 36 selfloop flow, removed 11 redundant places. [2023-09-01 08:30:58,823 INFO L231 Difference]: Finished difference. Result has 253 places, 687 transitions, 13155 flow [2023-09-01 08:30:58,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=13193, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=13155, PETRI_PLACES=253, PETRI_TRANSITIONS=687} [2023-09-01 08:30:58,824 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 222 predicate places. [2023-09-01 08:30:58,824 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 687 transitions, 13155 flow [2023-09-01 08:30:58,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 84.3913043478261) internal successors, (1941), 23 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:58,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:30:58,824 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:30:58,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-09-01 08:30:59,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-09-01 08:30:59,025 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:30:59,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:30:59,025 INFO L85 PathProgramCache]: Analyzing trace with hash 943788909, now seen corresponding path program 4 times [2023-09-01 08:30:59,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:30:59,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944121249] [2023-09-01 08:30:59,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:30:59,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:30:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:30:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:30:59,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:30:59,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944121249] [2023-09-01 08:30:59,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944121249] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:30:59,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521769893] [2023-09-01 08:30:59,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:30:59,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:30:59,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:30:59,778 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:30:59,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-09-01 08:30:59,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:30:59,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:30:59,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 39 conjunts are in the unsatisfiable core [2023-09-01 08:30:59,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:31:00,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:31:00,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:31:00,307 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 08:31:00,307 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 27 treesize of output 15 [2023-09-01 08:31:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:31:00,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521769893] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:31:00,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:31:00,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-09-01 08:31:00,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306668670] [2023-09-01 08:31:00,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:31:00,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 08:31:00,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:31:00,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 08:31:00,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2023-09-01 08:31:02,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 277 [2023-09-01 08:31:02,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 687 transitions, 13155 flow. Second operand has 35 states, 35 states have (on average 95.28571428571429) internal successors, (3335), 35 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:31:02,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:31:02,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 277 [2023-09-01 08:31:02,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:31:06,515 INFO L130 PetriNetUnfolder]: 1821/3400 cut-off events. [2023-09-01 08:31:06,516 INFO L131 PetriNetUnfolder]: For 59176/59177 co-relation queries the response was YES. [2023-09-01 08:31:06,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30894 conditions, 3400 events. 1821/3400 cut-off events. For 59176/59177 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 22814 event pairs, 212 based on Foata normal form. 190/3564 useless extension candidates. Maximal degree in co-relation 30820. Up to 985 conditions per place. [2023-09-01 08:31:06,545 INFO L137 encePairwiseOnDemand]: 267/277 looper letters, 497 selfloop transitions, 340 changer transitions 0/838 dead transitions. [2023-09-01 08:31:06,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 838 transitions, 17582 flow [2023-09-01 08:31:06,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-09-01 08:31:06,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-09-01 08:31:06,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3864 transitions. [2023-09-01 08:31:06,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35767842266037214 [2023-09-01 08:31:06,549 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3864 transitions. [2023-09-01 08:31:06,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3864 transitions. [2023-09-01 08:31:06,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:31:06,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3864 transitions. [2023-09-01 08:31:06,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 99.07692307692308) internal successors, (3864), 39 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:31:06,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 277.0) internal successors, (11080), 40 states have internal predecessors, (11080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:31:06,618 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 277.0) internal successors, (11080), 40 states have internal predecessors, (11080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:31:06,619 INFO L175 Difference]: Start difference. First operand has 253 places, 687 transitions, 13155 flow. Second operand 39 states and 3864 transitions. [2023-09-01 08:31:06,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 838 transitions, 17582 flow [2023-09-01 08:31:06,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 838 transitions, 17322 flow, removed 29 selfloop flow, removed 15 redundant places. [2023-09-01 08:31:06,923 INFO L231 Difference]: Finished difference. Result has 278 places, 732 transitions, 15762 flow [2023-09-01 08:31:06,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=11632, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=15762, PETRI_PLACES=278, PETRI_TRANSITIONS=732} [2023-09-01 08:31:06,923 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 247 predicate places. [2023-09-01 08:31:06,924 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 732 transitions, 15762 flow [2023-09-01 08:31:06,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 95.28571428571429) internal successors, (3335), 35 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:31:06,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:31:06,924 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:31:06,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-09-01 08:31:07,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:31:07,125 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:31:07,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:31:07,126 INFO L85 PathProgramCache]: Analyzing trace with hash -236143955, now seen corresponding path program 5 times [2023-09-01 08:31:07,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:31:07,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566278270] [2023-09-01 08:31:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:31:07,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:31:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:31:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:31:07,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:31:07,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566278270] [2023-09-01 08:31:07,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566278270] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:31:07,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686615186] [2023-09-01 08:31:07,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 08:31:07,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:31:07,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:31:07,666 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:31:07,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-09-01 08:31:07,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 08:31:07,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:31:07,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 57 conjunts are in the unsatisfiable core [2023-09-01 08:31:07,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:31:07,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-09-01 08:31:07,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-09-01 08:31:07,896 INFO L350 Elim1Store]: Elim1 eliminated variable 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 [2023-09-01 08:31:07,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:31:08,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:31:08,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-09-01 08:31:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:31:08,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:31:10,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:31:10,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 179 treesize of output 105 [2023-09-01 08:31:10,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:31:10,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 176 treesize of output 178 [2023-09-01 08:31:10,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 67 [2023-09-01 08:31:10,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:31:10,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 99 [2023-09-01 08:31:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:31:11,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686615186] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:31:11,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:31:11,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-09-01 08:31:11,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560580855] [2023-09-01 08:31:11,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:31:11,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 08:31:11,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:31:11,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 08:31:11,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=818, Unknown=10, NotChecked=0, Total=992 [2023-09-01 08:31:14,033 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] [2023-09-01 08:31:14,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 277 [2023-09-01 08:31:14,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 732 transitions, 15762 flow. Second operand has 32 states, 32 states have (on average 81.21875) internal successors, (2599), 32 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:31:14,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:31:14,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 277 [2023-09-01 08:31:14,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:31:17,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:31:19,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:31:22,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:31:24,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:31:26,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:31:27,480 INFO L130 PetriNetUnfolder]: 1909/3588 cut-off events. [2023-09-01 08:31:27,481 INFO L131 PetriNetUnfolder]: For 71561/71573 co-relation queries the response was YES. [2023-09-01 08:31:27,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34503 conditions, 3588 events. 1909/3588 cut-off events. For 71561/71573 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24467 event pairs, 266 based on Foata normal form. 25/3575 useless extension candidates. Maximal degree in co-relation 34419. Up to 2861 conditions per place. [2023-09-01 08:31:27,512 INFO L137 encePairwiseOnDemand]: 268/277 looper letters, 649 selfloop transitions, 170 changer transitions 0/826 dead transitions. [2023-09-01 08:31:27,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 826 transitions, 18580 flow [2023-09-01 08:31:27,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 08:31:27,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 08:31:27,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2196 transitions. [2023-09-01 08:31:27,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.304915301305193 [2023-09-01 08:31:27,516 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2196 transitions. [2023-09-01 08:31:27,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2196 transitions. [2023-09-01 08:31:27,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:31:27,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2196 transitions. [2023-09-01 08:31:27,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 84.46153846153847) internal successors, (2196), 26 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:31:27,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 277.0) internal successors, (7479), 27 states have internal predecessors, (7479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:31:27,522 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 277.0) internal successors, (7479), 27 states have internal predecessors, (7479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:31:27,522 INFO L175 Difference]: Start difference. First operand has 278 places, 732 transitions, 15762 flow. Second operand 26 states and 2196 transitions. [2023-09-01 08:31:27,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 826 transitions, 18580 flow [2023-09-01 08:31:28,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 826 transitions, 17702 flow, removed 400 selfloop flow, removed 11 redundant places. [2023-09-01 08:31:28,017 INFO L231 Difference]: Finished difference. Result has 299 places, 760 transitions, 15935 flow [2023-09-01 08:31:28,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=14876, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=15935, PETRI_PLACES=299, PETRI_TRANSITIONS=760} [2023-09-01 08:31:28,017 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 268 predicate places. [2023-09-01 08:31:28,017 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 760 transitions, 15935 flow [2023-09-01 08:31:28,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 81.21875) internal successors, (2599), 32 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:31:28,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:31:28,018 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:31:28,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-09-01 08:31:28,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:31:28,218 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:31:28,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:31:28,219 INFO L85 PathProgramCache]: Analyzing trace with hash 943785109, now seen corresponding path program 6 times [2023-09-01 08:31:28,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:31:28,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553549477] [2023-09-01 08:31:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:31:28,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:31:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:31:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:31:28,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:31:28,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553549477] [2023-09-01 08:31:28,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553549477] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:31:28,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967890904] [2023-09-01 08:31:28,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 08:31:28,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:31:28,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:31:28,517 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:31:28,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-09-01 08:31:28,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 08:31:28,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:31:28,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 42 conjunts are in the unsatisfiable core [2023-09-01 08:31:28,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:31:28,723 INFO L350 Elim1Store]: Elim1 eliminated variable 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 [2023-09-01 08:31:28,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:31:28,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:31:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:31:28,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:31:29,519 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:31:29,519 INFO L350 Elim1Store]: Elim1 eliminated variable 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 60 treesize of output 48 [2023-09-01 08:31:29,531 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 08:31:29,532 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 140 treesize of output 127 [2023-09-01 08:31:29,540 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:31:29,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 85 [2023-09-01 08:31:29,554 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 08:31:29,554 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 112 treesize of output 88 [2023-09-01 08:31:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:31:29,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967890904] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:31:29,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:31:29,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-09-01 08:31:29,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682800664] [2023-09-01 08:31:29,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:31:29,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 08:31:29,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:31:29,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 08:31:29,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=810, Unknown=4, NotChecked=0, Total=992 [2023-09-01 08:31:31,950 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] [2023-09-01 08:31:34,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:31:36,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:31:38,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:31:40,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:31:42,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:31:44,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:31:45,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 277 [2023-09-01 08:31:45,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 760 transitions, 15935 flow. Second operand has 32 states, 32 states have (on average 81.3125) internal successors, (2602), 32 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:31:45,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:31:45,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 277 [2023-09-01 08:31:45,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:31:47,055 INFO L130 PetriNetUnfolder]: 1601/3023 cut-off events. [2023-09-01 08:31:47,055 INFO L131 PetriNetUnfolder]: For 64572/64584 co-relation queries the response was YES. [2023-09-01 08:31:47,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29502 conditions, 3023 events. 1601/3023 cut-off events. For 64572/64584 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19877 event pairs, 269 based on Foata normal form. 139/3125 useless extension candidates. Maximal degree in co-relation 29410. Up to 1649 conditions per place. [2023-09-01 08:31:47,082 INFO L137 encePairwiseOnDemand]: 269/277 looper letters, 488 selfloop transitions, 219 changer transitions 37/751 dead transitions. [2023-09-01 08:31:47,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 751 transitions, 16808 flow [2023-09-01 08:31:47,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 08:31:47,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 08:31:47,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2203 transitions. [2023-09-01 08:31:47,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30588725354068314 [2023-09-01 08:31:47,084 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2203 transitions. [2023-09-01 08:31:47,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2203 transitions. [2023-09-01 08:31:47,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:31:47,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2203 transitions. [2023-09-01 08:31:47,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 84.73076923076923) internal successors, (2203), 26 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:31:47,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 277.0) internal successors, (7479), 27 states have internal predecessors, (7479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:31:47,090 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 277.0) internal successors, (7479), 27 states have internal predecessors, (7479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:31:47,090 INFO L175 Difference]: Start difference. First operand has 299 places, 760 transitions, 15935 flow. Second operand 26 states and 2203 transitions. [2023-09-01 08:31:47,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 751 transitions, 16808 flow [2023-09-01 08:31:47,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 751 transitions, 16462 flow, removed 67 selfloop flow, removed 18 redundant places. [2023-09-01 08:31:47,461 INFO L231 Difference]: Finished difference. Result has 312 places, 656 transitions, 14383 flow [2023-09-01 08:31:47,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=13674, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=14383, PETRI_PLACES=312, PETRI_TRANSITIONS=656} [2023-09-01 08:31:47,462 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 281 predicate places. [2023-09-01 08:31:47,462 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 656 transitions, 14383 flow [2023-09-01 08:31:47,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 81.3125) internal successors, (2602), 32 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:31:47,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:31:47,463 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:31:47,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-09-01 08:31:47,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-09-01 08:31:47,668 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:31:47,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:31:47,668 INFO L85 PathProgramCache]: Analyzing trace with hash 943788953, now seen corresponding path program 6 times [2023-09-01 08:31:47,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:31:47,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292169412] [2023-09-01 08:31:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:31:47,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:31:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:31:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:31:48,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:31:48,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292169412] [2023-09-01 08:31:48,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292169412] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:31:48,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702687592] [2023-09-01 08:31:48,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 08:31:48,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:31:48,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:31:48,337 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:31:48,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-09-01 08:31:48,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 08:31:48,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:31:48,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 60 conjunts are in the unsatisfiable core [2023-09-01 08:31:48,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:31:48,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:31:48,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 08:31:48,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:31:48,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:31:49,351 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:31:49,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 150 treesize of output 182 [2023-09-01 08:31:49,386 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:31:49,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 104 [2023-09-01 08:31:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:31:50,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702687592] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:31:50,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:31:50,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 35 [2023-09-01 08:31:50,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610979516] [2023-09-01 08:31:50,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:31:50,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-09-01 08:31:50,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:31:50,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-09-01 08:31:50,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1129, Unknown=1, NotChecked=0, Total=1332 [2023-09-01 08:31:50,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 277 [2023-09-01 08:31:50,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 656 transitions, 14383 flow. Second operand has 37 states, 37 states have (on average 76.21621621621621) internal successors, (2820), 37 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) [2023-09-01 08:31:50,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:31:50,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 277 [2023-09-01 08:31:50,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:32:00,986 INFO L130 PetriNetUnfolder]: 1736/3209 cut-off events. [2023-09-01 08:32:00,986 INFO L131 PetriNetUnfolder]: For 68247/68248 co-relation queries the response was YES. [2023-09-01 08:32:01,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32275 conditions, 3209 events. 1736/3209 cut-off events. For 68247/68248 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20759 event pairs, 60 based on Foata normal form. 43/3252 useless extension candidates. Maximal degree in co-relation 32177. Up to 856 conditions per place. [2023-09-01 08:32:01,018 INFO L137 encePairwiseOnDemand]: 266/277 looper letters, 356 selfloop transitions, 463 changer transitions 10/830 dead transitions. [2023-09-01 08:32:01,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 830 transitions, 18502 flow [2023-09-01 08:32:01,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-09-01 08:32:01,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-09-01 08:32:01,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3493 transitions. [2023-09-01 08:32:01,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28659337052838857 [2023-09-01 08:32:01,021 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3493 transitions. [2023-09-01 08:32:01,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3493 transitions. [2023-09-01 08:32:01,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:32:01,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3493 transitions. [2023-09-01 08:32:01,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 79.38636363636364) internal successors, (3493), 44 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:01,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 277.0) internal successors, (12465), 45 states have internal predecessors, (12465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:01,031 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 277.0) internal successors, (12465), 45 states have internal predecessors, (12465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:01,031 INFO L175 Difference]: Start difference. First operand has 312 places, 656 transitions, 14383 flow. Second operand 44 states and 3493 transitions. [2023-09-01 08:32:01,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 830 transitions, 18502 flow [2023-09-01 08:32:01,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 830 transitions, 17945 flow, removed 143 selfloop flow, removed 16 redundant places. [2023-09-01 08:32:01,545 INFO L231 Difference]: Finished difference. Result has 341 places, 723 transitions, 16682 flow [2023-09-01 08:32:01,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=13845, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=388, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=16682, PETRI_PLACES=341, PETRI_TRANSITIONS=723} [2023-09-01 08:32:01,546 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 310 predicate places. [2023-09-01 08:32:01,546 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 723 transitions, 16682 flow [2023-09-01 08:32:01,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 76.21621621621621) internal successors, (2820), 37 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) [2023-09-01 08:32:01,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:32:01,546 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:32:01,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-09-01 08:32:01,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-09-01 08:32:01,751 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:32:01,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:32:01,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1775379475, now seen corresponding path program 5 times [2023-09-01 08:32:01,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:32:01,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656762815] [2023-09-01 08:32:01,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:01,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:32:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:02,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:02,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:32:02,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656762815] [2023-09-01 08:32:02,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656762815] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:32:02,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530160116] [2023-09-01 08:32:02,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 08:32:02,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:32:02,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:32:02,472 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:32:02,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-09-01 08:32:02,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 08:32:02,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:32:02,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 39 conjunts are in the unsatisfiable core [2023-09-01 08:32:02,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:32:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:02,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:32:02,960 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 08:32:02,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-09-01 08:32:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:03,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530160116] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:32:03,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:32:03,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-09-01 08:32:03,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377267251] [2023-09-01 08:32:03,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:32:03,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 08:32:03,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:32:03,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 08:32:03,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2023-09-01 08:32:05,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 277 [2023-09-01 08:32:05,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 723 transitions, 16682 flow. Second operand has 35 states, 35 states have (on average 95.28571428571429) internal successors, (3335), 35 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:05,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:32:05,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 277 [2023-09-01 08:32:05,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:32:08,287 INFO L130 PetriNetUnfolder]: 1770/3316 cut-off events. [2023-09-01 08:32:08,288 INFO L131 PetriNetUnfolder]: For 77400/77401 co-relation queries the response was YES. [2023-09-01 08:32:08,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34354 conditions, 3316 events. 1770/3316 cut-off events. For 77400/77401 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 21632 event pairs, 124 based on Foata normal form. 29/3345 useless extension candidates. Maximal degree in co-relation 34249. Up to 885 conditions per place. [2023-09-01 08:32:08,323 INFO L137 encePairwiseOnDemand]: 267/277 looper letters, 361 selfloop transitions, 455 changer transitions 11/828 dead transitions. [2023-09-01 08:32:08,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 828 transitions, 19612 flow [2023-09-01 08:32:08,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 08:32:08,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 08:32:08,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3365 transitions. [2023-09-01 08:32:08,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35729454236568275 [2023-09-01 08:32:08,326 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3365 transitions. [2023-09-01 08:32:08,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3365 transitions. [2023-09-01 08:32:08,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:32:08,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3365 transitions. [2023-09-01 08:32:08,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 98.97058823529412) internal successors, (3365), 34 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:08,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 277.0) internal successors, (9695), 35 states have internal predecessors, (9695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:08,334 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 277.0) internal successors, (9695), 35 states have internal predecessors, (9695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:08,334 INFO L175 Difference]: Start difference. First operand has 341 places, 723 transitions, 16682 flow. Second operand 34 states and 3365 transitions. [2023-09-01 08:32:08,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 828 transitions, 19612 flow [2023-09-01 08:32:08,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 828 transitions, 19103 flow, removed 154 selfloop flow, removed 23 redundant places. [2023-09-01 08:32:08,887 INFO L231 Difference]: Finished difference. Result has 349 places, 743 transitions, 17761 flow [2023-09-01 08:32:08,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=16164, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=425, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=17761, PETRI_PLACES=349, PETRI_TRANSITIONS=743} [2023-09-01 08:32:08,888 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 318 predicate places. [2023-09-01 08:32:08,888 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 743 transitions, 17761 flow [2023-09-01 08:32:08,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 95.28571428571429) internal successors, (3335), 35 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:08,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:32:08,889 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:32:08,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-09-01 08:32:09,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-09-01 08:32:09,090 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:32:09,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:32:09,090 INFO L85 PathProgramCache]: Analyzing trace with hash 524519999, now seen corresponding path program 7 times [2023-09-01 08:32:09,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:32:09,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330159326] [2023-09-01 08:32:09,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:09,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:32:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:09,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:32:09,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330159326] [2023-09-01 08:32:09,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330159326] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:32:09,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049047684] [2023-09-01 08:32:09,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 08:32:09,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:32:09,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:32:09,783 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:32:09,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-09-01 08:32:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:09,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 63 conjunts are in the unsatisfiable core [2023-09-01 08:32:09,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:32:10,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:32:10,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2023-09-01 08:32:10,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:10,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:32:10,533 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1355 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1355) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ c_~s~0 (select .cse0 (+ .cse1 c_~q~0.offset 8)) (select .cse0 (+ .cse1 c_~q~0.offset)) (select .cse0 (+ .cse1 c_~q~0.offset 4)))) 2147483648)) is different from false [2023-09-01 08:32:10,732 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-09-01 08:32:10,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 107 treesize of output 140 [2023-09-01 08:32:10,744 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:32:10,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 7 [2023-09-01 08:32:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:11,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049047684] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:32:11,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:32:11,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 35 [2023-09-01 08:32:11,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965095103] [2023-09-01 08:32:11,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:32:11,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-09-01 08:32:11,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:32:11,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-09-01 08:32:11,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1079, Unknown=1, NotChecked=68, Total=1332 [2023-09-01 08:32:11,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 277 [2023-09-01 08:32:11,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 743 transitions, 17761 flow. Second operand has 37 states, 37 states have (on average 76.21621621621621) internal successors, (2820), 37 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) [2023-09-01 08:32:11,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:32:11,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 277 [2023-09-01 08:32:11,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:32:15,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:32:19,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:32:21,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:32:24,355 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] [2023-09-01 08:32:24,708 INFO L130 PetriNetUnfolder]: 1730/3252 cut-off events. [2023-09-01 08:32:24,708 INFO L131 PetriNetUnfolder]: For 81984/81985 co-relation queries the response was YES. [2023-09-01 08:32:24,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34746 conditions, 3252 events. 1730/3252 cut-off events. For 81984/81985 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 21287 event pairs, 133 based on Foata normal form. 25/3275 useless extension candidates. Maximal degree in co-relation 34638. Up to 887 conditions per place. [2023-09-01 08:32:24,741 INFO L137 encePairwiseOnDemand]: 266/277 looper letters, 388 selfloop transitions, 403 changer transitions 0/792 dead transitions. [2023-09-01 08:32:24,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 792 transitions, 19827 flow [2023-09-01 08:32:24,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 08:32:24,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 08:32:24,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1911 transitions. [2023-09-01 08:32:24,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28745487364620936 [2023-09-01 08:32:24,744 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1911 transitions. [2023-09-01 08:32:24,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1911 transitions. [2023-09-01 08:32:24,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:32:24,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1911 transitions. [2023-09-01 08:32:24,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 79.625) internal successors, (1911), 24 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:24,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 277.0) internal successors, (6925), 25 states have internal predecessors, (6925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:24,748 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 277.0) internal successors, (6925), 25 states have internal predecessors, (6925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:24,748 INFO L175 Difference]: Start difference. First operand has 349 places, 743 transitions, 17761 flow. Second operand 24 states and 1911 transitions. [2023-09-01 08:32:24,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 792 transitions, 19827 flow [2023-09-01 08:32:25,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 792 transitions, 19106 flow, removed 179 selfloop flow, removed 23 redundant places. [2023-09-01 08:32:25,318 INFO L231 Difference]: Finished difference. Result has 349 places, 746 transitions, 18019 flow [2023-09-01 08:32:25,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=16982, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=18019, PETRI_PLACES=349, PETRI_TRANSITIONS=746} [2023-09-01 08:32:25,319 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 318 predicate places. [2023-09-01 08:32:25,319 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 746 transitions, 18019 flow [2023-09-01 08:32:25,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 76.21621621621621) internal successors, (2820), 37 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) [2023-09-01 08:32:25,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:32:25,319 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:32:25,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-09-01 08:32:25,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-09-01 08:32:25,522 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:32:25,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:32:25,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1891632877, now seen corresponding path program 6 times [2023-09-01 08:32:25,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:32:25,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447905440] [2023-09-01 08:32:25,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:25,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:32:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:32:25,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:32:25,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447905440] [2023-09-01 08:32:25,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447905440] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:32:25,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818742945] [2023-09-01 08:32:25,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 08:32:25,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:32:25,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:32:25,590 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:32:25,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-09-01 08:32:25,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 08:32:25,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:32:25,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 08:32:25,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:32:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:32:25,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:32:26,067 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:32:26,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818742945] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:32:26,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:32:26,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 9] total 22 [2023-09-01 08:32:26,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356939920] [2023-09-01 08:32:26,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:32:26,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 08:32:26,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:32:26,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 08:32:26,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2023-09-01 08:32:26,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 277 [2023-09-01 08:32:26,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 746 transitions, 18019 flow. Second operand has 24 states, 24 states have (on average 111.70833333333333) internal successors, (2681), 24 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:26,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:32:26,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 277 [2023-09-01 08:32:26,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:32:27,543 INFO L130 PetriNetUnfolder]: 2036/3805 cut-off events. [2023-09-01 08:32:27,543 INFO L131 PetriNetUnfolder]: For 106997/107007 co-relation queries the response was YES. [2023-09-01 08:32:27,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41728 conditions, 3805 events. 2036/3805 cut-off events. For 106997/107007 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 26154 event pairs, 86 based on Foata normal form. 246/4046 useless extension candidates. Maximal degree in co-relation 41621. Up to 1306 conditions per place. [2023-09-01 08:32:27,583 INFO L137 encePairwiseOnDemand]: 269/277 looper letters, 285 selfloop transitions, 470 changer transitions 123/886 dead transitions. [2023-09-01 08:32:27,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 886 transitions, 22465 flow [2023-09-01 08:32:27,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 08:32:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 08:32:27,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2310 transitions. [2023-09-01 08:32:27,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41696750902527074 [2023-09-01 08:32:27,586 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2310 transitions. [2023-09-01 08:32:27,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2310 transitions. [2023-09-01 08:32:27,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:32:27,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2310 transitions. [2023-09-01 08:32:27,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 115.5) internal successors, (2310), 20 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:27,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 277.0) internal successors, (5817), 21 states have internal predecessors, (5817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:27,601 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 277.0) internal successors, (5817), 21 states have internal predecessors, (5817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:27,601 INFO L175 Difference]: Start difference. First operand has 349 places, 746 transitions, 18019 flow. Second operand 20 states and 2310 transitions. [2023-09-01 08:32:27,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 886 transitions, 22465 flow [2023-09-01 08:32:28,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 886 transitions, 21764 flow, removed 19 selfloop flow, removed 20 redundant places. [2023-09-01 08:32:28,178 INFO L231 Difference]: Finished difference. Result has 352 places, 714 transitions, 18741 flow [2023-09-01 08:32:28,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=14457, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=18741, PETRI_PLACES=352, PETRI_TRANSITIONS=714} [2023-09-01 08:32:28,179 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 321 predicate places. [2023-09-01 08:32:28,179 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 714 transitions, 18741 flow [2023-09-01 08:32:28,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 111.70833333333333) internal successors, (2681), 24 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:28,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:32:28,180 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:32:28,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-09-01 08:32:28,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:32:28,381 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:32:28,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:32:28,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1898819199, now seen corresponding path program 7 times [2023-09-01 08:32:28,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:32:28,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100457184] [2023-09-01 08:32:28,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:28,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:32:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:28,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:32:28,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100457184] [2023-09-01 08:32:28,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100457184] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:32:28,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112969946] [2023-09-01 08:32:28,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 08:32:28,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:32:28,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:32:28,955 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:32:28,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-09-01 08:32:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:29,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 08:32:29,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:32:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:32:29,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:32:29,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:32:29,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-09-01 08:32:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:32:29,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112969946] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:32:29,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:32:29,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 29 [2023-09-01 08:32:29,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431373406] [2023-09-01 08:32:29,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:32:29,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 08:32:29,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:32:29,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 08:32:29,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2023-09-01 08:32:31,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 277 [2023-09-01 08:32:31,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 714 transitions, 18741 flow. Second operand has 31 states, 31 states have (on average 97.41935483870968) internal successors, (3020), 31 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:31,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:32:31,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 277 [2023-09-01 08:32:31,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:32:35,874 INFO L130 PetriNetUnfolder]: 2392/4304 cut-off events. [2023-09-01 08:32:35,875 INFO L131 PetriNetUnfolder]: For 133681/133682 co-relation queries the response was YES. [2023-09-01 08:32:35,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51819 conditions, 4304 events. 2392/4304 cut-off events. For 133681/133682 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 28526 event pairs, 154 based on Foata normal form. 59/4363 useless extension candidates. Maximal degree in co-relation 51710. Up to 1660 conditions per place. [2023-09-01 08:32:35,924 INFO L137 encePairwiseOnDemand]: 267/277 looper letters, 490 selfloop transitions, 580 changer transitions 2/1073 dead transitions. [2023-09-01 08:32:35,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1073 transitions, 28552 flow [2023-09-01 08:32:35,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-09-01 08:32:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-09-01 08:32:35,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 6725 transitions. [2023-09-01 08:32:35,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.362357885661943 [2023-09-01 08:32:35,929 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 6725 transitions. [2023-09-01 08:32:35,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 6725 transitions. [2023-09-01 08:32:35,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:32:35,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 6725 transitions. [2023-09-01 08:32:35,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 100.3731343283582) internal successors, (6725), 67 states have internal predecessors, (6725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:35,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 277.0) internal successors, (18836), 68 states have internal predecessors, (18836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:35,942 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 277.0) internal successors, (18836), 68 states have internal predecessors, (18836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:35,943 INFO L175 Difference]: Start difference. First operand has 352 places, 714 transitions, 18741 flow. Second operand 67 states and 6725 transitions. [2023-09-01 08:32:35,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1073 transitions, 28552 flow [2023-09-01 08:32:36,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 1073 transitions, 25881 flow, removed 676 selfloop flow, removed 50 redundant places. [2023-09-01 08:32:36,854 INFO L231 Difference]: Finished difference. Result has 347 places, 939 transitions, 24124 flow [2023-09-01 08:32:36,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=16701, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=24124, PETRI_PLACES=347, PETRI_TRANSITIONS=939} [2023-09-01 08:32:36,855 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 316 predicate places. [2023-09-01 08:32:36,856 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 939 transitions, 24124 flow [2023-09-01 08:32:36,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 97.41935483870968) internal successors, (3020), 31 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:36,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:32:36,856 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:32:36,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-09-01 08:32:37,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-09-01 08:32:37,062 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:32:37,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:32:37,063 INFO L85 PathProgramCache]: Analyzing trace with hash -863224389, now seen corresponding path program 3 times [2023-09-01 08:32:37,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:32:37,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927963180] [2023-09-01 08:32:37,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:37,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:32:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:37,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:32:37,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927963180] [2023-09-01 08:32:37,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927963180] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:32:37,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068877262] [2023-09-01 08:32:37,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:32:37,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:32:37,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:32:37,674 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:32:37,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-09-01 08:32:37,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 08:32:37,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:32:37,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 08:32:37,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:32:37,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:32:37,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 08:32:38,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:32:38,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:32:38,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:32:38,270 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 48 treesize of output 41 [2023-09-01 08:32:38,274 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 12 treesize of output 5 [2023-09-01 08:32:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:32:38,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068877262] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:32:38,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:32:38,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 26 [2023-09-01 08:32:38,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281800113] [2023-09-01 08:32:38,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:32:38,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 08:32:38,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:32:38,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 08:32:38,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2023-09-01 08:32:39,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 277 [2023-09-01 08:32:39,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 939 transitions, 24124 flow. Second operand has 28 states, 28 states have (on average 98.39285714285714) internal successors, (2755), 28 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:39,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:32:39,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 277 [2023-09-01 08:32:39,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:32:42,535 INFO L130 PetriNetUnfolder]: 3016/5407 cut-off events. [2023-09-01 08:32:42,535 INFO L131 PetriNetUnfolder]: For 132381/132382 co-relation queries the response was YES. [2023-09-01 08:32:42,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59755 conditions, 5407 events. 3016/5407 cut-off events. For 132381/132382 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 37520 event pairs, 65 based on Foata normal form. 97/5504 useless extension candidates. Maximal degree in co-relation 59657. Up to 2623 conditions per place. [2023-09-01 08:32:42,585 INFO L137 encePairwiseOnDemand]: 268/277 looper letters, 582 selfloop transitions, 668 changer transitions 0/1251 dead transitions. [2023-09-01 08:32:42,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 1251 transitions, 33465 flow [2023-09-01 08:32:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 08:32:42,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 08:32:42,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2646 transitions. [2023-09-01 08:32:42,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673979450152735 [2023-09-01 08:32:42,587 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2646 transitions. [2023-09-01 08:32:42,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2646 transitions. [2023-09-01 08:32:42,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:32:42,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2646 transitions. [2023-09-01 08:32:42,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 101.76923076923077) internal successors, (2646), 26 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:42,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 277.0) internal successors, (7479), 27 states have internal predecessors, (7479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:42,593 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 277.0) internal successors, (7479), 27 states have internal predecessors, (7479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:42,593 INFO L175 Difference]: Start difference. First operand has 347 places, 939 transitions, 24124 flow. Second operand 26 states and 2646 transitions. [2023-09-01 08:32:42,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 1251 transitions, 33465 flow [2023-09-01 08:32:43,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 1251 transitions, 31377 flow, removed 511 selfloop flow, removed 28 redundant places. [2023-09-01 08:32:43,562 INFO L231 Difference]: Finished difference. Result has 348 places, 1116 transitions, 28684 flow [2023-09-01 08:32:43,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=21825, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=923, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=493, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=28684, PETRI_PLACES=348, PETRI_TRANSITIONS=1116} [2023-09-01 08:32:43,563 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 317 predicate places. [2023-09-01 08:32:43,563 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 1116 transitions, 28684 flow [2023-09-01 08:32:43,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 98.39285714285714) internal successors, (2755), 28 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:43,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:32:43,564 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:32:43,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-09-01 08:32:43,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-09-01 08:32:43,764 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:32:43,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:32:43,765 INFO L85 PathProgramCache]: Analyzing trace with hash -487881059, now seen corresponding path program 8 times [2023-09-01 08:32:43,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:32:43,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997603308] [2023-09-01 08:32:43,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:43,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:32:43,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:45,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:32:45,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997603308] [2023-09-01 08:32:45,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997603308] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:32:45,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44377555] [2023-09-01 08:32:45,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:32:45,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:32:45,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:32:45,285 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:32:45,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-09-01 08:32:45,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:32:45,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:32:45,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 08:32:45,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:32:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:32:45,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:32:45,659 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 08:32:45,659 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 27 treesize of output 15 [2023-09-01 08:32:45,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:32:45,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44377555] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:32:45,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:32:45,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 27 [2023-09-01 08:32:45,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13994502] [2023-09-01 08:32:45,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:32:45,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 08:32:45,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:32:45,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 08:32:45,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2023-09-01 08:32:48,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 277 [2023-09-01 08:32:48,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 1116 transitions, 28684 flow. Second operand has 29 states, 29 states have (on average 94.37931034482759) internal successors, (2737), 29 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:48,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:32:48,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 277 [2023-09-01 08:32:48,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:32:52,177 INFO L130 PetriNetUnfolder]: 3256/5872 cut-off events. [2023-09-01 08:32:52,177 INFO L131 PetriNetUnfolder]: For 158256/158257 co-relation queries the response was YES. [2023-09-01 08:32:52,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64538 conditions, 5872 events. 3256/5872 cut-off events. For 158256/158257 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 41704 event pairs, 135 based on Foata normal form. 177/6041 useless extension candidates. Maximal degree in co-relation 64437. Up to 1775 conditions per place. [2023-09-01 08:32:52,231 INFO L137 encePairwiseOnDemand]: 267/277 looper letters, 313 selfloop transitions, 1062 changer transitions 0/1376 dead transitions. [2023-09-01 08:32:52,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1376 transitions, 36159 flow [2023-09-01 08:32:52,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-09-01 08:32:52,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-09-01 08:32:52,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 4409 transitions. [2023-09-01 08:32:52,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35371038908945046 [2023-09-01 08:32:52,234 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 4409 transitions. [2023-09-01 08:32:52,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 4409 transitions. [2023-09-01 08:32:52,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:32:52,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 4409 transitions. [2023-09-01 08:32:52,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 97.97777777777777) internal successors, (4409), 45 states have internal predecessors, (4409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:52,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 277.0) internal successors, (12742), 46 states have internal predecessors, (12742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:52,243 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 277.0) internal successors, (12742), 46 states have internal predecessors, (12742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:52,243 INFO L175 Difference]: Start difference. First operand has 348 places, 1116 transitions, 28684 flow. Second operand 45 states and 4409 transitions. [2023-09-01 08:32:52,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1376 transitions, 36159 flow [2023-09-01 08:32:53,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1376 transitions, 35890 flow, removed 48 selfloop flow, removed 15 redundant places. [2023-09-01 08:32:53,398 INFO L231 Difference]: Finished difference. Result has 386 places, 1256 transitions, 35411 flow [2023-09-01 08:32:53,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=28138, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=928, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=35411, PETRI_PLACES=386, PETRI_TRANSITIONS=1256} [2023-09-01 08:32:53,399 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 355 predicate places. [2023-09-01 08:32:53,399 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 1256 transitions, 35411 flow [2023-09-01 08:32:53,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 94.37931034482759) internal successors, (2737), 29 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:53,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:32:53,400 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:32:53,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-09-01 08:32:53,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-09-01 08:32:53,600 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:32:53,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:32:53,600 INFO L85 PathProgramCache]: Analyzing trace with hash 943794409, now seen corresponding path program 7 times [2023-09-01 08:32:53,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:32:53,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146695693] [2023-09-01 08:32:53,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:53,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:32:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:54,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:32:54,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146695693] [2023-09-01 08:32:54,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146695693] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:32:54,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085742322] [2023-09-01 08:32:54,000 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 08:32:54,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:32:54,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:32:54,002 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:32:54,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-09-01 08:32:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:54,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 08:32:54,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:32:54,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:54,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:32:54,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:32:54,440 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 18 [2023-09-01 08:32:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:54,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085742322] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:32:54,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:32:54,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-09-01 08:32:54,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590221794] [2023-09-01 08:32:54,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:32:54,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 08:32:54,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:32:54,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 08:32:54,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2023-09-01 08:32:55,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 277 [2023-09-01 08:32:55,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1256 transitions, 35411 flow. Second operand has 32 states, 32 states have (on average 103.3125) internal successors, (3306), 32 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:55,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:32:55,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 277 [2023-09-01 08:32:55,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:32:58,965 INFO L130 PetriNetUnfolder]: 3230/5818 cut-off events. [2023-09-01 08:32:58,965 INFO L131 PetriNetUnfolder]: For 179549/179557 co-relation queries the response was YES. [2023-09-01 08:32:58,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68739 conditions, 5818 events. 3230/5818 cut-off events. For 179549/179557 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 41303 event pairs, 218 based on Foata normal form. 32/5841 useless extension candidates. Maximal degree in co-relation 68628. Up to 4577 conditions per place. [2023-09-01 08:32:59,029 INFO L137 encePairwiseOnDemand]: 270/277 looper letters, 869 selfloop transitions, 411 changer transitions 29/1318 dead transitions. [2023-09-01 08:32:59,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1318 transitions, 38617 flow [2023-09-01 08:32:59,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 08:32:59,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 08:32:59,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2753 transitions. [2023-09-01 08:32:59,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38225492918633713 [2023-09-01 08:32:59,032 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2753 transitions. [2023-09-01 08:32:59,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2753 transitions. [2023-09-01 08:32:59,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:32:59,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2753 transitions. [2023-09-01 08:32:59,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 105.88461538461539) internal successors, (2753), 26 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:59,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 277.0) internal successors, (7479), 27 states have internal predecessors, (7479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:59,037 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 277.0) internal successors, (7479), 27 states have internal predecessors, (7479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:59,037 INFO L175 Difference]: Start difference. First operand has 386 places, 1256 transitions, 35411 flow. Second operand 26 states and 2753 transitions. [2023-09-01 08:32:59,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1318 transitions, 38617 flow [2023-09-01 08:33:00,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 1318 transitions, 37007 flow, removed 440 selfloop flow, removed 19 redundant places. [2023-09-01 08:33:00,873 INFO L231 Difference]: Finished difference. Result has 394 places, 1253 transitions, 35195 flow [2023-09-01 08:33:00,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=33642, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=838, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=35195, PETRI_PLACES=394, PETRI_TRANSITIONS=1253} [2023-09-01 08:33:00,874 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 363 predicate places. [2023-09-01 08:33:00,874 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 1253 transitions, 35195 flow [2023-09-01 08:33:00,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 103.3125) internal successors, (3306), 32 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:33:00,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:00,875 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:00,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-09-01 08:33:01,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:01,080 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:33:01,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:01,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1878820777, now seen corresponding path program 8 times [2023-09-01 08:33:01,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:01,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763277823] [2023-09-01 08:33:01,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:01,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:01,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:01,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:01,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763277823] [2023-09-01 08:33:01,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763277823] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:01,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800608412] [2023-09-01 08:33:01,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:33:01,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:01,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:01,617 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:33:01,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-09-01 08:33:01,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:33:01,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:33:01,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 74 conjunts are in the unsatisfiable core [2023-09-01 08:33:01,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:01,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:33:01,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:33:01,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:33:02,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:33:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:02,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:33:03,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:03,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 227 treesize of output 132 [2023-09-01 08:33:03,255 INFO L321 Elim1Store]: treesize reduction 36, result has 65.0 percent of original size [2023-09-01 08:33:03,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 364 treesize of output 379 [2023-09-01 08:33:03,321 INFO L321 Elim1Store]: treesize reduction 36, result has 65.0 percent of original size [2023-09-01 08:33:03,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 313 treesize of output 301 [2023-09-01 08:33:03,392 INFO L321 Elim1Store]: treesize reduction 36, result has 65.0 percent of original size [2023-09-01 08:33:03,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 206 treesize of output 233 [2023-09-01 08:33:08,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:08,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800608412] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:33:08,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:33:08,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2023-09-01 08:33:08,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424534432] [2023-09-01 08:33:08,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:33:08,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-09-01 08:33:08,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:08,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-09-01 08:33:08,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=885, Unknown=2, NotChecked=0, Total=1122 [2023-09-01 08:33:09,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 277 [2023-09-01 08:33:09,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1253 transitions, 35195 flow. Second operand has 34 states, 34 states have (on average 81.23529411764706) internal successors, (2762), 34 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:33:09,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:09,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 277 [2023-09-01 08:33:09,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:12,728 INFO L130 PetriNetUnfolder]: 3210/5767 cut-off events. [2023-09-01 08:33:12,728 INFO L131 PetriNetUnfolder]: For 175091/175097 co-relation queries the response was YES. [2023-09-01 08:33:12,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67616 conditions, 5767 events. 3210/5767 cut-off events. For 175091/175097 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 40725 event pairs, 870 based on Foata normal form. 5/5767 useless extension candidates. Maximal degree in co-relation 67506. Up to 5498 conditions per place. [2023-09-01 08:33:12,788 INFO L137 encePairwiseOnDemand]: 269/277 looper letters, 1204 selfloop transitions, 58 changer transitions 28/1298 dead transitions. [2023-09-01 08:33:12,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 1298 transitions, 38398 flow [2023-09-01 08:33:12,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 08:33:12,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 08:33:12,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1993 transitions. [2023-09-01 08:33:12,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29978941034897716 [2023-09-01 08:33:12,790 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1993 transitions. [2023-09-01 08:33:12,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1993 transitions. [2023-09-01 08:33:12,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:12,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1993 transitions. [2023-09-01 08:33:12,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 83.04166666666667) internal successors, (1993), 24 states have internal predecessors, (1993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:33:12,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 277.0) internal successors, (6925), 25 states have internal predecessors, (6925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:33:12,795 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 277.0) internal successors, (6925), 25 states have internal predecessors, (6925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:33:12,795 INFO L175 Difference]: Start difference. First operand has 394 places, 1253 transitions, 35195 flow. Second operand 24 states and 1993 transitions. [2023-09-01 08:33:12,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 1298 transitions, 38398 flow [2023-09-01 08:33:14,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1298 transitions, 37682 flow, removed 6 selfloop flow, removed 19 redundant places. [2023-09-01 08:33:14,335 INFO L231 Difference]: Finished difference. Result has 386 places, 1240 transitions, 34398 flow [2023-09-01 08:33:14,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=34492, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=34398, PETRI_PLACES=386, PETRI_TRANSITIONS=1240} [2023-09-01 08:33:14,336 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 355 predicate places. [2023-09-01 08:33:14,336 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 1240 transitions, 34398 flow [2023-09-01 08:33:14,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 81.23529411764706) internal successors, (2762), 34 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:33:14,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:14,336 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:14,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-09-01 08:33:14,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:14,537 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:33:14,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:14,537 INFO L85 PathProgramCache]: Analyzing trace with hash 943794533, now seen corresponding path program 9 times [2023-09-01 08:33:14,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:14,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377806353] [2023-09-01 08:33:14,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:14,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:14,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:15,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:15,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377806353] [2023-09-01 08:33:15,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377806353] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:15,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108130738] [2023-09-01 08:33:15,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:33:15,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:15,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:15,168 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:33:15,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-09-01 08:33:15,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 08:33:15,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:33:15,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 65 conjunts are in the unsatisfiable core [2023-09-01 08:33:15,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:15,421 INFO L350 Elim1Store]: Elim1 eliminated variable 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 [2023-09-01 08:33:15,459 INFO L350 Elim1Store]: Elim1 eliminated variable 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 [2023-09-01 08:33:15,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:33:15,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:33:15,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2023-09-01 08:33:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:15,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:33:18,869 INFO L321 Elim1Store]: treesize reduction 16, result has 65.2 percent of original size [2023-09-01 08:33:18,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 217 treesize of output 132 [2023-09-01 08:33:18,995 INFO L321 Elim1Store]: treesize reduction 42, result has 73.9 percent of original size [2023-09-01 08:33:18,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 655 treesize of output 673 [2023-09-01 08:33:19,036 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:33:19,038 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:33:19,039 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:33:19,041 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:33:19,042 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:33:19,072 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:19,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 202 treesize of output 230 [2023-09-01 08:33:19,132 INFO L321 Elim1Store]: treesize reduction 26, result has 60.0 percent of original size [2023-09-01 08:33:19,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 185 treesize of output 159 [2023-09-01 08:33:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:33,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108130738] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:33:33,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:33:33,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 34 [2023-09-01 08:33:33,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781390987] [2023-09-01 08:33:33,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:33:33,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-09-01 08:33:33,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:33,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-09-01 08:33:33,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1024, Unknown=3, NotChecked=0, Total=1260 [2023-09-01 08:33:35,393 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] [2023-09-01 08:33:38,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:33:40,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:33:42,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:33:42,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 277 [2023-09-01 08:33:42,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1240 transitions, 34398 flow. Second operand has 36 states, 36 states have (on average 76.25) internal successors, (2745), 36 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:33:42,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:42,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 277 [2023-09-01 08:33:42,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:50,720 INFO L130 PetriNetUnfolder]: 3199/5709 cut-off events. [2023-09-01 08:33:50,720 INFO L131 PetriNetUnfolder]: For 165273/165280 co-relation queries the response was YES. [2023-09-01 08:33:50,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65849 conditions, 5709 events. 3199/5709 cut-off events. For 165273/165280 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 40029 event pairs, 872 based on Foata normal form. 5/5683 useless extension candidates. Maximal degree in co-relation 65745. Up to 5516 conditions per place. [2023-09-01 08:33:50,778 INFO L137 encePairwiseOnDemand]: 267/277 looper letters, 1210 selfloop transitions, 50 changer transitions 15/1276 dead transitions. [2023-09-01 08:33:50,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 1276 transitions, 37438 flow [2023-09-01 08:33:50,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 08:33:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 08:33:50,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1640 transitions. [2023-09-01 08:33:50,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28193226749183425 [2023-09-01 08:33:50,780 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1640 transitions. [2023-09-01 08:33:50,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1640 transitions. [2023-09-01 08:33:50,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:50,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1640 transitions. [2023-09-01 08:33:50,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 78.0952380952381) internal successors, (1640), 21 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:33:50,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 277.0) internal successors, (6094), 22 states have internal predecessors, (6094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:33:50,784 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 277.0) internal successors, (6094), 22 states have internal predecessors, (6094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:33:50,784 INFO L175 Difference]: Start difference. First operand has 386 places, 1240 transitions, 34398 flow. Second operand 21 states and 1640 transitions. [2023-09-01 08:33:50,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 1276 transitions, 37438 flow [2023-09-01 08:33:52,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 1276 transitions, 36814 flow, removed 4 selfloop flow, removed 25 redundant places. [2023-09-01 08:33:52,439 INFO L231 Difference]: Finished difference. Result has 374 places, 1228 transitions, 33713 flow [2023-09-01 08:33:52,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=33756, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=33713, PETRI_PLACES=374, PETRI_TRANSITIONS=1228} [2023-09-01 08:33:52,440 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 343 predicate places. [2023-09-01 08:33:52,440 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 1228 transitions, 33713 flow [2023-09-01 08:33:52,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 76.25) internal successors, (2745), 36 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:33:52,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:52,441 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:52,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-09-01 08:33:52,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-09-01 08:33:52,645 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:33:52,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:52,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1269472527, now seen corresponding path program 4 times [2023-09-01 08:33:52,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:52,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959240336] [2023-09-01 08:33:52,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:52,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:53,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:53,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959240336] [2023-09-01 08:33:53,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959240336] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:53,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772922699] [2023-09-01 08:33:53,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:33:53,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:53,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:53,284 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:33:53,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-09-01 08:33:53,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:33:53,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:33:53,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 42 conjunts are in the unsatisfiable core [2023-09-01 08:33:53,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:53,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:33:53,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:33:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:53,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:33:53,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:53,904 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 48 treesize of output 41 [2023-09-01 08:33:53,910 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 12 treesize of output 5 [2023-09-01 08:33:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:54,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772922699] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:33:54,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:33:54,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-09-01 08:33:54,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249784231] [2023-09-01 08:33:54,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:33:54,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 08:33:54,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:54,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 08:33:54,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1034, Unknown=6, NotChecked=0, Total=1190 [2023-09-01 08:33:55,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 277 [2023-09-01 08:33:55,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 1228 transitions, 33713 flow. Second operand has 35 states, 35 states have (on average 93.2) internal successors, (3262), 35 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:33:55,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:55,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 277 [2023-09-01 08:33:55,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:59,939 INFO L130 PetriNetUnfolder]: 4046/7267 cut-off events. [2023-09-01 08:33:59,939 INFO L131 PetriNetUnfolder]: For 200427/200437 co-relation queries the response was YES. [2023-09-01 08:33:59,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82546 conditions, 7267 events. 4046/7267 cut-off events. For 200427/200437 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 52346 event pairs, 381 based on Foata normal form. 65/7327 useless extension candidates. Maximal degree in co-relation 82445. Up to 2488 conditions per place. [2023-09-01 08:34:00,019 INFO L137 encePairwiseOnDemand]: 267/277 looper letters, 690 selfloop transitions, 908 changer transitions 22/1628 dead transitions. [2023-09-01 08:34:00,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1628 transitions, 46566 flow [2023-09-01 08:34:00,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 08:34:00,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 08:34:00,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2883 transitions. [2023-09-01 08:34:00,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34693140794223826 [2023-09-01 08:34:00,023 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2883 transitions. [2023-09-01 08:34:00,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2883 transitions. [2023-09-01 08:34:00,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:34:00,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2883 transitions. [2023-09-01 08:34:00,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 96.1) internal successors, (2883), 30 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:00,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 277.0) internal successors, (8587), 31 states have internal predecessors, (8587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:00,031 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 277.0) internal successors, (8587), 31 states have internal predecessors, (8587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:00,032 INFO L175 Difference]: Start difference. First operand has 374 places, 1228 transitions, 33713 flow. Second operand 30 states and 2883 transitions. [2023-09-01 08:34:00,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1628 transitions, 46566 flow [2023-09-01 08:34:02,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 1628 transitions, 46473 flow, removed 0 selfloop flow, removed 17 redundant places. [2023-09-01 08:34:02,267 INFO L231 Difference]: Finished difference. Result has 385 places, 1517 transitions, 45695 flow [2023-09-01 08:34:02,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=33482, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=603, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=45695, PETRI_PLACES=385, PETRI_TRANSITIONS=1517} [2023-09-01 08:34:02,268 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 354 predicate places. [2023-09-01 08:34:02,272 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 1517 transitions, 45695 flow [2023-09-01 08:34:02,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 93.2) internal successors, (3262), 35 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:02,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:34:02,273 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:34:02,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-09-01 08:34:02,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-09-01 08:34:02,475 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:34:02,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:34:02,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1771741891, now seen corresponding path program 10 times [2023-09-01 08:34:02,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:34:02,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877985301] [2023-09-01 08:34:02,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:34:02,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:34:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:34:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:34:03,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:34:03,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877985301] [2023-09-01 08:34:03,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877985301] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:34:03,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660565375] [2023-09-01 08:34:03,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:34:03,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:34:03,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:34:03,127 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:34:03,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-09-01 08:34:03,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:34:03,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:34:03,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 69 conjunts are in the unsatisfiable core [2023-09-01 08:34:03,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:34:03,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-09-01 08:34:03,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-09-01 08:34:03,357 INFO L350 Elim1Store]: Elim1 eliminated variable 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 [2023-09-01 08:34:03,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:34:03,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:34:03,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2023-09-01 08:34:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:34:03,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:34:04,869 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:34:04,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 268 treesize of output 138 [2023-09-01 08:34:04,946 INFO L321 Elim1Store]: treesize reduction 24, result has 78.0 percent of original size [2023-09-01 08:34:04,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 516 treesize of output 516 [2023-09-01 08:34:04,966 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:34:04,967 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:34:04,969 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:34:05,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:34:05,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 162 treesize of output 208 [2023-09-01 08:34:05,032 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:34:05,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 127 treesize of output 103 [2023-09-01 08:34:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:34:08,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660565375] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:34:08,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:34:08,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 35 [2023-09-01 08:34:08,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473821527] [2023-09-01 08:34:08,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:34:08,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-09-01 08:34:08,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:34:08,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-09-01 08:34:08,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1128, Unknown=6, NotChecked=0, Total=1332 [2023-09-01 08:34:09,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 277 [2023-09-01 08:34:09,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 1517 transitions, 45695 flow. Second operand has 37 states, 37 states have (on average 73.21621621621621) internal successors, (2709), 37 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:09,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:34:09,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 277 [2023-09-01 08:34:09,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:34:13,948 INFO L130 PetriNetUnfolder]: 4045/7243 cut-off events. [2023-09-01 08:34:13,948 INFO L131 PetriNetUnfolder]: For 232222/232229 co-relation queries the response was YES. [2023-09-01 08:34:13,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88293 conditions, 7243 events. 4045/7243 cut-off events. For 232222/232229 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 51811 event pairs, 524 based on Foata normal form. 3/7218 useless extension candidates. Maximal degree in co-relation 88185. Up to 3705 conditions per place. [2023-09-01 08:34:14,030 INFO L137 encePairwiseOnDemand]: 267/277 looper letters, 788 selfloop transitions, 729 changer transitions 14/1532 dead transitions. [2023-09-01 08:34:14,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1532 transitions, 48833 flow [2023-09-01 08:34:14,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 08:34:14,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 08:34:14,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1205 transitions. [2023-09-01 08:34:14,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27188628158844763 [2023-09-01 08:34:14,032 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1205 transitions. [2023-09-01 08:34:14,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1205 transitions. [2023-09-01 08:34:14,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:34:14,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1205 transitions. [2023-09-01 08:34:14,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 75.3125) internal successors, (1205), 16 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:14,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 277.0) internal successors, (4709), 17 states have internal predecessors, (4709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:14,035 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 277.0) internal successors, (4709), 17 states have internal predecessors, (4709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:14,035 INFO L175 Difference]: Start difference. First operand has 385 places, 1517 transitions, 45695 flow. Second operand 16 states and 1205 transitions. [2023-09-01 08:34:14,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1532 transitions, 48833 flow [2023-09-01 08:34:16,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1532 transitions, 48009 flow, removed 135 selfloop flow, removed 17 redundant places. [2023-09-01 08:34:16,997 INFO L231 Difference]: Finished difference. Result has 358 places, 1507 transitions, 46192 flow [2023-09-01 08:34:16,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=44866, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=729, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=787, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=46192, PETRI_PLACES=358, PETRI_TRANSITIONS=1507} [2023-09-01 08:34:16,998 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 327 predicate places. [2023-09-01 08:34:16,998 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 1507 transitions, 46192 flow [2023-09-01 08:34:16,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 73.21621621621621) internal successors, (2709), 37 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:16,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:34:16,999 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:34:17,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-09-01 08:34:17,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-09-01 08:34:17,200 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:34:17,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:34:17,200 INFO L85 PathProgramCache]: Analyzing trace with hash -286096561, now seen corresponding path program 11 times [2023-09-01 08:34:17,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:34:17,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956923053] [2023-09-01 08:34:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:34:17,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:34:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:34:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:34:18,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:34:18,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956923053] [2023-09-01 08:34:18,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956923053] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:34:18,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270295653] [2023-09-01 08:34:18,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 08:34:18,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:34:18,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:34:18,244 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:34:18,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-09-01 08:34:18,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 08:34:18,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:34:18,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 50 conjunts are in the unsatisfiable core [2023-09-01 08:34:18,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:34:18,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:34:18,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-09-01 08:34:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:34:18,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:34:18,773 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1782 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1782) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ c_~s~0 (select .cse0 (+ .cse1 c_~q~0.offset 4)) (select .cse0 (+ .cse1 c_~q~0.offset)))) 2147483648)) is different from false [2023-09-01 08:34:18,837 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:34:18,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 79 [2023-09-01 08:34:18,872 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:34:18,873 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 19 treesize of output 6 [2023-09-01 08:34:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-09-01 08:34:18,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270295653] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:34:18,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:34:18,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 7] total 31 [2023-09-01 08:34:18,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989669297] [2023-09-01 08:34:18,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:34:18,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 08:34:18,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:34:18,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 08:34:18,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=870, Unknown=1, NotChecked=60, Total=1056 [2023-09-01 08:34:19,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 277 [2023-09-01 08:34:19,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 1507 transitions, 46192 flow. Second operand has 33 states, 33 states have (on average 76.3030303030303) internal successors, (2518), 33 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:19,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:34:19,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 277 [2023-09-01 08:34:19,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:34:24,349 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_1782 (Array Int Int))) (< (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1782) c_~q~0.base)) (.cse2 (* c_~q_front~0 4))) (+ c_~s~0 (select .cse1 (+ .cse2 c_~q~0.offset 4)) (select .cse1 (+ .cse2 c_~q~0.offset)))) 2147483648)))) (and (or (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (<= c_~N~0 |c_thread1Thread1of1ForFork0_~i~0#1|) .cse0) .cse0)) is different from false [2023-09-01 08:34:27,305 INFO L130 PetriNetUnfolder]: 4014/7196 cut-off events. [2023-09-01 08:34:27,305 INFO L131 PetriNetUnfolder]: For 256583/256586 co-relation queries the response was YES. [2023-09-01 08:34:27,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88614 conditions, 7196 events. 4014/7196 cut-off events. For 256583/256586 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 51692 event pairs, 68 based on Foata normal form. 49/7241 useless extension candidates. Maximal degree in co-relation 88507. Up to 2246 conditions per place. [2023-09-01 08:34:27,384 INFO L137 encePairwiseOnDemand]: 267/277 looper letters, 546 selfloop transitions, 1012 changer transitions 0/1559 dead transitions. [2023-09-01 08:34:27,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 1559 transitions, 49910 flow [2023-09-01 08:34:27,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 08:34:27,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 08:34:27,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1892 transitions. [2023-09-01 08:34:27,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28459687123947053 [2023-09-01 08:34:27,386 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1892 transitions. [2023-09-01 08:34:27,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1892 transitions. [2023-09-01 08:34:27,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:34:27,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1892 transitions. [2023-09-01 08:34:27,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 78.83333333333333) internal successors, (1892), 24 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:27,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 277.0) internal successors, (6925), 25 states have internal predecessors, (6925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:27,391 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 277.0) internal successors, (6925), 25 states have internal predecessors, (6925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:27,391 INFO L175 Difference]: Start difference. First operand has 358 places, 1507 transitions, 46192 flow. Second operand 24 states and 1892 transitions. [2023-09-01 08:34:27,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 1559 transitions, 49910 flow [2023-09-01 08:34:30,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1559 transitions, 48134 flow, removed 19 selfloop flow, removed 11 redundant places. [2023-09-01 08:34:30,712 INFO L231 Difference]: Finished difference. Result has 354 places, 1506 transitions, 46821 flow [2023-09-01 08:34:30,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=43780, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=989, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=46821, PETRI_PLACES=354, PETRI_TRANSITIONS=1506} [2023-09-01 08:34:30,715 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 323 predicate places. [2023-09-01 08:34:30,715 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 1506 transitions, 46821 flow [2023-09-01 08:34:30,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 76.3030303030303) internal successors, (2518), 33 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:30,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:34:30,716 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:34:30,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-09-01 08:34:30,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:34:30,921 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:34:30,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:34:30,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1104722069, now seen corresponding path program 8 times [2023-09-01 08:34:30,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:34:30,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001261686] [2023-09-01 08:34:30,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:34:30,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:34:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:34:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:34:32,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:34:32,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001261686] [2023-09-01 08:34:32,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001261686] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:34:32,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706034780] [2023-09-01 08:34:32,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:34:32,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:34:32,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:34:32,147 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:34:32,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-09-01 08:34:32,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:34:32,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:34:32,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 08:34:32,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:34:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:34:32,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:34:32,510 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 08:34:32,511 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 25 treesize of output 13 [2023-09-01 08:34:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:34:32,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706034780] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:34:32,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:34:32,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 24 [2023-09-01 08:34:32,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094623988] [2023-09-01 08:34:32,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:34:32,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 08:34:32,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:34:32,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 08:34:32,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2023-09-01 08:34:33,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 277 [2023-09-01 08:34:33,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 1506 transitions, 46821 flow. Second operand has 26 states, 26 states have (on average 100.34615384615384) internal successors, (2609), 26 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:33,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:34:33,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 277 [2023-09-01 08:34:33,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:34:37,712 INFO L130 PetriNetUnfolder]: 3977/7139 cut-off events. [2023-09-01 08:34:37,712 INFO L131 PetriNetUnfolder]: For 254169/254179 co-relation queries the response was YES. [2023-09-01 08:34:37,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90362 conditions, 7139 events. 3977/7139 cut-off events. For 254169/254179 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 51132 event pairs, 207 based on Foata normal form. 54/7185 useless extension candidates. Maximal degree in co-relation 90254. Up to 4536 conditions per place. [2023-09-01 08:34:37,784 INFO L137 encePairwiseOnDemand]: 268/277 looper letters, 861 selfloop transitions, 546 changer transitions 144/1558 dead transitions. [2023-09-01 08:34:37,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 1558 transitions, 50235 flow [2023-09-01 08:34:37,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 08:34:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 08:34:37,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2283 transitions. [2023-09-01 08:34:37,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3746307843780768 [2023-09-01 08:34:37,786 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2283 transitions. [2023-09-01 08:34:37,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2283 transitions. [2023-09-01 08:34:37,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:34:37,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2283 transitions. [2023-09-01 08:34:37,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 103.77272727272727) internal successors, (2283), 22 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:37,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 277.0) internal successors, (6371), 23 states have internal predecessors, (6371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:37,791 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 277.0) internal successors, (6371), 23 states have internal predecessors, (6371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:37,791 INFO L175 Difference]: Start difference. First operand has 354 places, 1506 transitions, 46821 flow. Second operand 22 states and 2283 transitions. [2023-09-01 08:34:37,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 1558 transitions, 50235 flow [2023-09-01 08:34:40,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1558 transitions, 49254 flow, removed 44 selfloop flow, removed 17 redundant places. [2023-09-01 08:34:40,644 INFO L231 Difference]: Finished difference. Result has 359 places, 1374 transitions, 42113 flow [2023-09-01 08:34:40,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=45662, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=540, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=955, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=42113, PETRI_PLACES=359, PETRI_TRANSITIONS=1374} [2023-09-01 08:34:40,645 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 328 predicate places. [2023-09-01 08:34:40,645 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 1374 transitions, 42113 flow [2023-09-01 08:34:40,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 100.34615384615384) internal successors, (2609), 26 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:40,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:34:40,646 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:34:40,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-09-01 08:34:40,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:34:40,846 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:34:40,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:34:40,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1101027985, now seen corresponding path program 12 times [2023-09-01 08:34:40,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:34:40,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052169580] [2023-09-01 08:34:40,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:34:40,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:34:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:34:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:34:41,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:34:41,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052169580] [2023-09-01 08:34:41,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052169580] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:34:41,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719715837] [2023-09-01 08:34:41,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 08:34:41,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:34:41,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:34:41,788 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:34:41,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-09-01 08:34:41,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 08:34:41,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:34:41,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 51 conjunts are in the unsatisfiable core [2023-09-01 08:34:41,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:34:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:34:42,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:34:42,594 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:34:42,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 104 [2023-09-01 08:34:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:34:42,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719715837] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:34:42,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:34:42,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 30 [2023-09-01 08:34:42,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214023633] [2023-09-01 08:34:42,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:34:42,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 08:34:42,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:34:42,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 08:34:42,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2023-09-01 08:34:44,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 277 [2023-09-01 08:34:44,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 1374 transitions, 42113 flow. Second operand has 32 states, 32 states have (on average 99.40625) internal successors, (3181), 32 states have internal predecessors, (3181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:44,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:34:44,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 277 [2023-09-01 08:34:44,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:34:49,176 INFO L130 PetriNetUnfolder]: 3984/7073 cut-off events. [2023-09-01 08:34:49,176 INFO L131 PetriNetUnfolder]: For 242688/242691 co-relation queries the response was YES. [2023-09-01 08:34:49,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86659 conditions, 7073 events. 3984/7073 cut-off events. For 242688/242691 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 50206 event pairs, 246 based on Foata normal form. 163/7232 useless extension candidates. Maximal degree in co-relation 86547. Up to 2301 conditions per place. [2023-09-01 08:34:49,254 INFO L137 encePairwiseOnDemand]: 267/277 looper letters, 775 selfloop transitions, 932 changer transitions 0/1708 dead transitions. [2023-09-01 08:34:49,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 1708 transitions, 51727 flow [2023-09-01 08:34:49,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-09-01 08:34:49,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-09-01 08:34:49,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 5322 transitions. [2023-09-01 08:34:49,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36948069980560955 [2023-09-01 08:34:49,257 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 5322 transitions. [2023-09-01 08:34:49,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 5322 transitions. [2023-09-01 08:34:49,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:34:49,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 5322 transitions. [2023-09-01 08:34:49,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 102.34615384615384) internal successors, (5322), 52 states have internal predecessors, (5322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:49,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 277.0) internal successors, (14681), 53 states have internal predecessors, (14681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:49,268 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 277.0) internal successors, (14681), 53 states have internal predecessors, (14681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:49,268 INFO L175 Difference]: Start difference. First operand has 359 places, 1374 transitions, 42113 flow. Second operand 52 states and 5322 transitions. [2023-09-01 08:34:49,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 1708 transitions, 51727 flow [2023-09-01 08:34:51,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 1708 transitions, 50802 flow, removed 69 selfloop flow, removed 12 redundant places. [2023-09-01 08:34:51,643 INFO L231 Difference]: Finished difference. Result has 407 places, 1555 transitions, 48518 flow [2023-09-01 08:34:51,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=41249, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=776, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=48518, PETRI_PLACES=407, PETRI_TRANSITIONS=1555} [2023-09-01 08:34:51,645 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 376 predicate places. [2023-09-01 08:34:51,645 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 1555 transitions, 48518 flow [2023-09-01 08:34:51,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 99.40625) internal successors, (3181), 32 states have internal predecessors, (3181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:51,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:34:51,646 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:34:51,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-09-01 08:34:51,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:34:51,854 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:34:51,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:34:51,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1212565675, now seen corresponding path program 13 times [2023-09-01 08:34:51,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:34:51,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802405122] [2023-09-01 08:34:51,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:34:51,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:34:51,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:34:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:34:52,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:34:52,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802405122] [2023-09-01 08:34:52,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802405122] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:34:52,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30705820] [2023-09-01 08:34:52,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 08:34:52,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:34:52,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:34:52,677 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:34:52,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-09-01 08:34:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:34:52,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 51 conjunts are in the unsatisfiable core [2023-09-01 08:34:52,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:34:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:34:53,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:34:53,432 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:34:53,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 104 [2023-09-01 08:34:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:34:53,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30705820] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:34:53,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:34:53,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 30 [2023-09-01 08:34:53,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776362402] [2023-09-01 08:34:53,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:34:53,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 08:34:53,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:34:53,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 08:34:53,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2023-09-01 08:34:56,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 277 [2023-09-01 08:34:56,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 1555 transitions, 48518 flow. Second operand has 32 states, 32 states have (on average 99.40625) internal successors, (3181), 32 states have internal predecessors, (3181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:34:56,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:34:56,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 277 [2023-09-01 08:34:56,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:35:02,003 INFO L130 PetriNetUnfolder]: 4853/8506 cut-off events. [2023-09-01 08:35:02,003 INFO L131 PetriNetUnfolder]: For 319546/319549 co-relation queries the response was YES. [2023-09-01 08:35:02,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106458 conditions, 8506 events. 4853/8506 cut-off events. For 319546/319549 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 60861 event pairs, 376 based on Foata normal form. 241/8743 useless extension candidates. Maximal degree in co-relation 106335. Up to 2787 conditions per place. [2023-09-01 08:35:02,125 INFO L137 encePairwiseOnDemand]: 267/277 looper letters, 750 selfloop transitions, 1284 changer transitions 6/2041 dead transitions. [2023-09-01 08:35:02,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 2041 transitions, 64763 flow [2023-09-01 08:35:02,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-09-01 08:35:02,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-09-01 08:35:02,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 4397 transitions. [2023-09-01 08:35:02,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691545630089833 [2023-09-01 08:35:02,128 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 4397 transitions. [2023-09-01 08:35:02,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 4397 transitions. [2023-09-01 08:35:02,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:35:02,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 4397 transitions. [2023-09-01 08:35:02,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 102.25581395348837) internal successors, (4397), 43 states have internal predecessors, (4397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:35:02,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 277.0) internal successors, (12188), 44 states have internal predecessors, (12188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:35:02,138 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 277.0) internal successors, (12188), 44 states have internal predecessors, (12188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:35:02,138 INFO L175 Difference]: Start difference. First operand has 407 places, 1555 transitions, 48518 flow. Second operand 43 states and 4397 transitions. [2023-09-01 08:35:02,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 2041 transitions, 64763 flow [2023-09-01 08:35:06,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 2041 transitions, 62272 flow, removed 688 selfloop flow, removed 24 redundant places. [2023-09-01 08:35:06,102 INFO L231 Difference]: Finished difference. Result has 438 places, 1903 transitions, 60353 flow [2023-09-01 08:35:06,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=46529, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=984, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=60353, PETRI_PLACES=438, PETRI_TRANSITIONS=1903} [2023-09-01 08:35:06,103 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 407 predicate places. [2023-09-01 08:35:06,104 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 1903 transitions, 60353 flow [2023-09-01 08:35:06,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 99.40625) internal successors, (3181), 32 states have internal predecessors, (3181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:35:06,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:35:06,104 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:35:06,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-09-01 08:35:06,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-09-01 08:35:06,317 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:35:06,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:35:06,317 INFO L85 PathProgramCache]: Analyzing trace with hash -990150335, now seen corresponding path program 9 times [2023-09-01 08:35:06,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:35:06,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637777595] [2023-09-01 08:35:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:35:06,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:35:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:35:07,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:35:07,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:35:07,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637777595] [2023-09-01 08:35:07,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637777595] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:35:07,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021536647] [2023-09-01 08:35:07,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:35:07,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:35:07,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:35:07,249 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:35:07,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-09-01 08:35:07,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 08:35:07,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:35:07,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 08:35:07,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:35:07,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:35:07,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 08:35:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:35:07,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:35:07,731 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:35:07,732 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 44 treesize of output 37 [2023-09-01 08:35:07,735 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 10 treesize of output 3 [2023-09-01 08:35:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:35:07,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021536647] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:35:07,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:35:07,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 28 [2023-09-01 08:35:07,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27430855] [2023-09-01 08:35:07,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:35:07,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 08:35:07,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:35:07,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 08:35:07,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=781, Unknown=5, NotChecked=0, Total=870 [2023-09-01 08:35:08,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 277 [2023-09-01 08:35:08,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 1903 transitions, 60353 flow. Second operand has 30 states, 30 states have (on average 81.3) internal successors, (2439), 30 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:35:08,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:35:08,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 277 [2023-09-01 08:35:08,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:35:14,583 INFO L130 PetriNetUnfolder]: 4831/8460 cut-off events. [2023-09-01 08:35:14,583 INFO L131 PetriNetUnfolder]: For 317255/317259 co-relation queries the response was YES. [2023-09-01 08:35:14,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110290 conditions, 8460 events. 4831/8460 cut-off events. For 317255/317259 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 60099 event pairs, 322 based on Foata normal form. 14/8471 useless extension candidates. Maximal degree in co-relation 110157. Up to 6230 conditions per place. [2023-09-01 08:35:14,680 INFO L137 encePairwiseOnDemand]: 269/277 looper letters, 1252 selfloop transitions, 667 changer transitions 19/1945 dead transitions. [2023-09-01 08:35:14,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 1945 transitions, 64485 flow [2023-09-01 08:35:14,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 08:35:14,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 08:35:14,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1774 transitions. [2023-09-01 08:35:14,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30496819666494757 [2023-09-01 08:35:14,682 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1774 transitions. [2023-09-01 08:35:14,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1774 transitions. [2023-09-01 08:35:14,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:35:14,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1774 transitions. [2023-09-01 08:35:14,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 84.47619047619048) internal successors, (1774), 21 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:35:14,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 277.0) internal successors, (6094), 22 states have internal predecessors, (6094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:35:14,687 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 277.0) internal successors, (6094), 22 states have internal predecessors, (6094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:35:14,687 INFO L175 Difference]: Start difference. First operand has 438 places, 1903 transitions, 60353 flow. Second operand 21 states and 1774 transitions. [2023-09-01 08:35:14,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 1945 transitions, 64485 flow [2023-09-01 08:35:18,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1945 transitions, 62942 flow, removed 505 selfloop flow, removed 18 redundant places. [2023-09-01 08:35:18,860 INFO L231 Difference]: Finished difference. Result has 442 places, 1894 transitions, 59859 flow [2023-09-01 08:35:18,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=58810, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1903, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=667, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=59859, PETRI_PLACES=442, PETRI_TRANSITIONS=1894} [2023-09-01 08:35:18,861 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 411 predicate places. [2023-09-01 08:35:18,861 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 1894 transitions, 59859 flow [2023-09-01 08:35:18,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.3) internal successors, (2439), 30 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:35:18,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:35:18,862 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:35:18,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-09-01 08:35:19,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-09-01 08:35:19,062 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:35:19,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:35:19,063 INFO L85 PathProgramCache]: Analyzing trace with hash -376337745, now seen corresponding path program 14 times [2023-09-01 08:35:19,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:35:19,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660848019] [2023-09-01 08:35:19,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:35:19,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:35:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:35:20,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:35:20,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:35:20,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660848019] [2023-09-01 08:35:20,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660848019] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:35:20,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458610044] [2023-09-01 08:35:20,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:35:20,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:35:20,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:35:20,180 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:35:20,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-09-01 08:35:20,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:35:20,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:35:20,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 08:35:20,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:35:20,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:35:20,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-09-01 08:35:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:35:20,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:35:23,067 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:35:23,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 129 treesize of output 161 [2023-09-01 08:35:23,085 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:35:23,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 58 [2023-09-01 08:35:23,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:35:23,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458610044] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:35:23,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:35:23,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 31 [2023-09-01 08:35:23,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610847483] [2023-09-01 08:35:23,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:35:23,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 08:35:23,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:35:23,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 08:35:23,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=936, Unknown=7, NotChecked=0, Total=1056 [2023-09-01 08:35:25,838 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] [2023-09-01 08:35:28,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:35:30,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:35:32,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:35:35,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:35:37,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:35:37,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 277 [2023-09-01 08:35:37,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 1894 transitions, 59859 flow. Second operand has 33 states, 33 states have (on average 84.27272727272727) internal successors, (2781), 33 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:35:37,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:35:37,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 277 [2023-09-01 08:35:37,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:35:44,578 WARN L222 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:35:48,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:35:50,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:35:57,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:35:59,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:36:01,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:36:03,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:36:05,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:36:07,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:36:09,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:36:13,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:36:15,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:36:17,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:36:19,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:36:21,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:36:27,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:36:31,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:36:34,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:36:44,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:36:46,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:36:48,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:36:50,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:36:52,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:36:54,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:36:56,729 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] [2023-09-01 08:37:01,214 INFO L130 PetriNetUnfolder]: 5317/9218 cut-off events. [2023-09-01 08:37:01,215 INFO L131 PetriNetUnfolder]: For 354393/354407 co-relation queries the response was YES. [2023-09-01 08:37:01,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118755 conditions, 9218 events. 5317/9218 cut-off events. For 354393/354407 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 65559 event pairs, 131 based on Foata normal form. 132/9344 useless extension candidates. Maximal degree in co-relation 118619. Up to 5788 conditions per place. [2023-09-01 08:37:01,341 INFO L137 encePairwiseOnDemand]: 268/277 looper letters, 1399 selfloop transitions, 794 changer transitions 0/2200 dead transitions. [2023-09-01 08:37:01,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 2200 transitions, 70645 flow [2023-09-01 08:37:01,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 08:37:01,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 08:37:01,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3081 transitions. [2023-09-01 08:37:01,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.317792676637442 [2023-09-01 08:37:01,344 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3081 transitions. [2023-09-01 08:37:01,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3081 transitions. [2023-09-01 08:37:01,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:37:01,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3081 transitions. [2023-09-01 08:37:01,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 88.02857142857142) internal successors, (3081), 35 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:37:01,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 277.0) internal successors, (9972), 36 states have internal predecessors, (9972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:37:01,351 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 277.0) internal successors, (9972), 36 states have internal predecessors, (9972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:37:01,351 INFO L175 Difference]: Start difference. First operand has 442 places, 1894 transitions, 59859 flow. Second operand 35 states and 3081 transitions. [2023-09-01 08:37:01,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 2200 transitions, 70645 flow [2023-09-01 08:37:06,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 2200 transitions, 69650 flow, removed 25 selfloop flow, removed 14 redundant places. [2023-09-01 08:37:06,520 INFO L231 Difference]: Finished difference. Result has 471 places, 2054 transitions, 66038 flow [2023-09-01 08:37:06,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=58883, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=656, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=66038, PETRI_PLACES=471, PETRI_TRANSITIONS=2054} [2023-09-01 08:37:06,522 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 440 predicate places. [2023-09-01 08:37:06,522 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 2054 transitions, 66038 flow [2023-09-01 08:37:06,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 84.27272727272727) internal successors, (2781), 33 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:37:06,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:37:06,522 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:37:06,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-09-01 08:37:06,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:37:06,732 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:37:06,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:37:06,732 INFO L85 PathProgramCache]: Analyzing trace with hash -487881015, now seen corresponding path program 15 times [2023-09-01 08:37:06,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:37:06,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130606564] [2023-09-01 08:37:06,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:37:06,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:37:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:37:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:37:07,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:37:07,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130606564] [2023-09-01 08:37:07,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130606564] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:37:07,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145084163] [2023-09-01 08:37:07,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:37:07,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:37:07,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:37:07,654 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:37:07,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-09-01 08:37:07,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 08:37:07,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:37:07,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 44 conjunts are in the unsatisfiable core [2023-09-01 08:37:07,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:37:08,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:37:08,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2023-09-01 08:37:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:37:08,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:37:10,475 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:37:10,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 129 treesize of output 161 [2023-09-01 08:37:10,493 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:37:10,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 58 [2023-09-01 08:37:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:37:10,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145084163] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:37:10,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:37:10,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 28 [2023-09-01 08:37:10,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107912585] [2023-09-01 08:37:10,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:37:10,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 08:37:10,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:37:10,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 08:37:10,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=775, Unknown=9, NotChecked=0, Total=870 [2023-09-01 08:37:13,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 277 [2023-09-01 08:37:13,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 2054 transitions, 66038 flow. Second operand has 30 states, 30 states have (on average 84.3) internal successors, (2529), 30 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:37:13,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:37:13,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 277 [2023-09-01 08:37:13,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:37:20,148 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] [2023-09-01 08:37:22,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:37:28,486 WARN L222 SmtUtils]: Spent 6.08s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:37:30,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:37:32,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:37:34,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:37:36,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:37:38,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:37:40,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:37:42,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:37:49,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:37:51,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:37:51,346 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~q_front~0 4))) (let ((.cse6 (+ .cse1 c_~q~0.offset)) (.cse0 (select |c_#memory_int| c_~q~0.base)) (.cse7 (+ .cse1 c_~q~0.offset 4))) (let ((.cse5 (+ .cse1 c_~q~0.offset 8)) (.cse2 (select .cse0 .cse7)) (.cse4 (+ c_~q~0.offset (* 4 c_~q_back~0))) (.cse8 (select .cse0 .cse6))) (and (= (select .cse0 .cse1) 1) (= (select .cse0 (+ .cse1 4)) 1) (= .cse2 1) (= c_~q~0.offset 0) (forall ((v_ArrVal_2037 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2037) c_~q~0.base))) (or (not (= (select .cse3 .cse4) 1)) (< (+ c_~s~0 (select .cse3 .cse5) (select .cse3 .cse6) (select .cse3 .cse7)) 2147483648)))) (or (< (+ c_~s~0 .cse8 (select .cse0 .cse5) .cse2) 2147483648) (not (= (select .cse0 .cse4) 1))) (<= c_~s~0 1) (= .cse8 1) (= (select .cse0 (+ .cse1 c_~q~0.offset (- 4))) 1))))) is different from false [2023-09-01 08:37:55,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:37:57,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:38:05,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:38:08,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:38:10,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:38:16,180 INFO L130 PetriNetUnfolder]: 6222/10764 cut-off events. [2023-09-01 08:38:16,180 INFO L131 PetriNetUnfolder]: For 451211/451225 co-relation queries the response was YES. [2023-09-01 08:38:16,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143575 conditions, 10764 events. 6222/10764 cut-off events. For 451211/451225 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 77973 event pairs, 165 based on Foata normal form. 322/11080 useless extension candidates. Maximal degree in co-relation 143427. Up to 6142 conditions per place. [2023-09-01 08:38:16,332 INFO L137 encePairwiseOnDemand]: 267/277 looper letters, 1391 selfloop transitions, 1143 changer transitions 29/2570 dead transitions. [2023-09-01 08:38:16,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 2570 transitions, 84034 flow [2023-09-01 08:38:16,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-09-01 08:38:16,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-09-01 08:38:16,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3864 transitions. [2023-09-01 08:38:16,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3170331473580571 [2023-09-01 08:38:16,335 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3864 transitions. [2023-09-01 08:38:16,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3864 transitions. [2023-09-01 08:38:16,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:38:16,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3864 transitions. [2023-09-01 08:38:16,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 87.81818181818181) internal successors, (3864), 44 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:38:16,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 277.0) internal successors, (12465), 45 states have internal predecessors, (12465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:38:16,343 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 277.0) internal successors, (12465), 45 states have internal predecessors, (12465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:38:16,343 INFO L175 Difference]: Start difference. First operand has 471 places, 2054 transitions, 66038 flow. Second operand 44 states and 3864 transitions. [2023-09-01 08:38:16,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 2570 transitions, 84034 flow [2023-09-01 08:38:23,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 2570 transitions, 82952 flow, removed 450 selfloop flow, removed 13 redundant places. [2023-09-01 08:38:23,685 INFO L231 Difference]: Finished difference. Result has 513 places, 2335 transitions, 76695 flow [2023-09-01 08:38:23,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=65100, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2049, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=886, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=961, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=76695, PETRI_PLACES=513, PETRI_TRANSITIONS=2335} [2023-09-01 08:38:23,687 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 482 predicate places. [2023-09-01 08:38:23,687 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 2335 transitions, 76695 flow [2023-09-01 08:38:23,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 84.3) internal successors, (2529), 30 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:38:23,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:38:23,687 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:38:23,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-09-01 08:38:23,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-09-01 08:38:23,888 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:38:23,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:38:23,888 INFO L85 PathProgramCache]: Analyzing trace with hash -487875435, now seen corresponding path program 16 times [2023-09-01 08:38:23,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:38:23,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808211387] [2023-09-01 08:38:23,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:38:23,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:38:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:38:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:38:25,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:38:25,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808211387] [2023-09-01 08:38:25,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808211387] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:38:25,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940940577] [2023-09-01 08:38:25,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:38:25,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:38:25,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:38:25,032 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:38:25,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-09-01 08:38:25,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:38:25,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:38:25,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 56 conjunts are in the unsatisfiable core [2023-09-01 08:38:25,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:38:25,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:38:25,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-09-01 08:38:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:38:25,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:38:28,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:38:28,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 129 treesize of output 161 [2023-09-01 08:38:28,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:38:28,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 58 [2023-09-01 08:38:28,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:38:28,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940940577] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:38:28,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:38:28,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 33 [2023-09-01 08:38:28,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812373433] [2023-09-01 08:38:28,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:38:28,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 08:38:28,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:38:28,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 08:38:28,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1065, Unknown=7, NotChecked=0, Total=1190 [2023-09-01 08:38:31,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:38:33,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:38:35,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:38:37,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:38:40,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:38:42,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:38:44,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:38:46,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:38:49,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:38:51,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:38:53,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:38:56,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:38:56,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 277 [2023-09-01 08:38:56,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 2335 transitions, 76695 flow. Second operand has 35 states, 35 states have (on average 76.28571428571429) internal successors, (2670), 35 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:38:56,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:38:56,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 277 [2023-09-01 08:38:56,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:39:03,241 WARN L222 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:39:25,801 WARN L222 SmtUtils]: Spent 22.44s on a formula simplification. DAG size of input: 73 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:39:27,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:39:38,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:39:46,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:39:49,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:39:51,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:39:53,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:39:55,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:39:57,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:39:59,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:40:10,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:40:12,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:40:14,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:40:16,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:40:25,270 WARN L222 SmtUtils]: Spent 8.22s on a formula simplification. DAG size of input: 82 DAG size of output: 79 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:40:27,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:40:29,883 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] [2023-09-01 08:41:02,703 WARN L222 SmtUtils]: Spent 32.46s on a formula simplification. DAG size of input: 78 DAG size of output: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:41:10,089 INFO L130 PetriNetUnfolder]: 7193/12424 cut-off events. [2023-09-01 08:41:10,090 INFO L131 PetriNetUnfolder]: For 564242/564245 co-relation queries the response was YES. [2023-09-01 08:41:10,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172245 conditions, 12424 events. 7193/12424 cut-off events. For 564242/564245 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 91524 event pairs, 13 based on Foata normal form. 216/12636 useless extension candidates. Maximal degree in co-relation 172084. Up to 3730 conditions per place. [2023-09-01 08:41:10,263 INFO L137 encePairwiseOnDemand]: 267/277 looper letters, 630 selfloop transitions, 2280 changer transitions 9/2920 dead transitions. [2023-09-01 08:41:10,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 2920 transitions, 98203 flow [2023-09-01 08:41:10,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-09-01 08:41:10,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-09-01 08:41:10,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4202 transitions. [2023-09-01 08:41:10,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2862202847217492 [2023-09-01 08:41:10,267 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4202 transitions. [2023-09-01 08:41:10,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4202 transitions. [2023-09-01 08:41:10,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:41:10,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4202 transitions. [2023-09-01 08:41:10,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 79.28301886792453) internal successors, (4202), 53 states have internal predecessors, (4202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:41:10,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 277.0) internal successors, (14958), 54 states have internal predecessors, (14958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:41:10,277 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 277.0) internal successors, (14958), 54 states have internal predecessors, (14958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:41:10,277 INFO L175 Difference]: Start difference. First operand has 513 places, 2335 transitions, 76695 flow. Second operand 53 states and 4202 transitions. [2023-09-01 08:41:10,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 2920 transitions, 98203 flow [2023-09-01 08:41:20,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 2920 transitions, 96868 flow, removed 404 selfloop flow, removed 22 redundant places. [2023-09-01 08:41:20,356 INFO L231 Difference]: Finished difference. Result has 551 places, 2758 transitions, 95272 flow [2023-09-01 08:41:20,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=75424, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1890, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=95272, PETRI_PLACES=551, PETRI_TRANSITIONS=2758} [2023-09-01 08:41:20,358 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 520 predicate places. [2023-09-01 08:41:20,358 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 2758 transitions, 95272 flow [2023-09-01 08:41:20,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 76.28571428571429) internal successors, (2670), 35 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:41:20,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:41:20,359 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:41:20,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-09-01 08:41:20,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-09-01 08:41:20,564 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:41:20,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:41:20,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1735102907, now seen corresponding path program 17 times [2023-09-01 08:41:20,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:41:20,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428682868] [2023-09-01 08:41:20,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:41:20,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:41:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:41:21,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:41:21,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:41:21,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428682868] [2023-09-01 08:41:21,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428682868] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:41:21,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733885753] [2023-09-01 08:41:21,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 08:41:21,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:41:21,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:41:21,628 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:41:21,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-09-01 08:41:21,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 08:41:21,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:41:21,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-09-01 08:41:21,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:41:22,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:41:22,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2023-09-01 08:41:22,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:41:22,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:41:22,277 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2123 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2123) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ c_~s~0 (select .cse0 (+ .cse1 c_~q~0.offset)) (select .cse0 (+ .cse1 c_~q~0.offset 4)) (select .cse0 (+ .cse1 c_~q~0.offset 8)))) 2147483648)) is different from false [2023-09-01 08:41:22,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:41:22,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 140 [2023-09-01 08:41:22,510 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:41:22,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 7 [2023-09-01 08:41:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:41:22,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733885753] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:41:22,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:41:22,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 33 [2023-09-01 08:41:22,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278326186] [2023-09-01 08:41:22,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:41:22,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 08:41:22,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:41:22,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 08:41:22,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=999, Unknown=1, NotChecked=64, Total=1190 [2023-09-01 08:41:22,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 277 [2023-09-01 08:41:22,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 2758 transitions, 95272 flow. Second operand has 35 states, 35 states have (on average 73.28571428571429) internal successors, (2565), 35 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:41:22,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:41:22,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 277 [2023-09-01 08:41:22,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:41:31,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:41:31,270 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_2123 (Array Int Int))) (< (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2123) c_~q~0.base)) (.cse2 (* c_~q_front~0 4))) (+ c_~s~0 (select .cse1 (+ .cse2 c_~q~0.offset)) (select .cse1 (+ .cse2 c_~q~0.offset 4)) (select .cse1 (+ .cse2 c_~q~0.offset 8)))) 2147483648)))) (and .cse0 (or (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (<= c_~N~0 |c_thread1Thread1of1ForFork0_~i~0#1|) .cse0))) is different from false [2023-09-01 08:41:37,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:41:37,622 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~q_front~0 4))) (let ((.cse2 (+ .cse4 c_~q~0.offset))) (let ((.cse1 (select |c_#memory_int| c_~q~0.base)) (.cse0 (forall ((v_ArrVal_2123 (Array Int Int))) (< (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2123) c_~q~0.base))) (+ c_~s~0 (select .cse3 .cse2) (select .cse3 (+ .cse4 c_~q~0.offset 4)) (select .cse3 (+ .cse4 c_~q~0.offset 8)))) 2147483648)))) (and .cse0 (< (+ c_~s~0 (select .cse1 .cse2)) 2147483648) (or (not (= (select .cse1 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (<= c_~N~0 |c_thread1Thread1of1ForFork0_~i~0#1|) .cse0))))) is different from false Killed by 15