./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.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 d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 12:01:07,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 12:01:07,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 12:01:07,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 12:01:07,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 12:01:07,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 12:01:07,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 12:01:07,865 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 12:01:07,869 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 12:01:07,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 12:01:07,875 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 12:01:07,877 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 12:01:07,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 12:01:07,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 12:01:07,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 12:01:07,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 12:01:07,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 12:01:07,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 12:01:07,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 12:01:07,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 12:01:07,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 12:01:07,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 12:01:07,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 12:01:07,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 12:01:07,905 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 12:01:07,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 12:01:07,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 12:01:07,907 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 12:01:07,908 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 12:01:07,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 12:01:07,909 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 12:01:07,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 12:01:07,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 12:01:07,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 12:01:07,918 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 12:01:07,919 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 12:01:07,919 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 12:01:07,919 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 12:01:07,920 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 12:01:07,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 12:01:07,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 12:01:07,922 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 12:01:07,958 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 12:01:07,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 12:01:07,959 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 12:01:07,959 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 12:01:07,960 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 12:01:07,961 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 12:01:07,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 12:01:07,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 12:01:07,961 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 12:01:07,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 12:01:07,962 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 12:01:07,963 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 12:01:07,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 12:01:07,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 12:01:07,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 12:01:07,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 12:01:07,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 12:01:07,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 12:01:07,964 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 12:01:07,964 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 12:01:07,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 12:01:07,965 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 12:01:07,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 12:01:07,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 12:01:07,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 12:01:07,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 12:01:07,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 12:01:07,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 12:01:07,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 12:01:07,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 12:01:07,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 12:01:07,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 12:01:07,967 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 12:01:07,967 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 12:01:07,967 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 12:01:07,967 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 12:01:07,968 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 12:01:07,968 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 12:01:08,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 12:01:08,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 12:01:08,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 12:01:08,321 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 12:01:08,322 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 12:01:08,323 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-30 12:01:09,504 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 12:01:09,732 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 12:01:09,732 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-30 12:01:09,744 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e9671759/07e40e37b5734a8fb17bcd2678a4b215/FLAG40e30bd23 [2023-08-30 12:01:09,794 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e9671759/07e40e37b5734a8fb17bcd2678a4b215 [2023-08-30 12:01:09,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 12:01:09,799 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 12:01:09,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 12:01:09,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 12:01:09,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 12:01:09,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:01:09" (1/1) ... [2023-08-30 12:01:09,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10229d92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:09, skipping insertion in model container [2023-08-30 12:01:09,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:01:09" (1/1) ... [2023-08-30 12:01:09,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 12:01:09,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 12:01:09,974 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-send-receive-alt.wvr.c[2650,2663] [2023-08-30 12:01:09,979 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 12:01:09,987 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 12:01:10,021 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-send-receive-alt.wvr.c[2650,2663] [2023-08-30 12:01:10,029 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 12:01:10,036 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 12:01:10,038 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 12:01:10,043 INFO L208 MainTranslator]: Completed translation [2023-08-30 12:01:10,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:10 WrapperNode [2023-08-30 12:01:10,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 12:01:10,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 12:01:10,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 12:01:10,046 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 12:01:10,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:10" (1/1) ... [2023-08-30 12:01:10,069 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:10" (1/1) ... [2023-08-30 12:01:10,101 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 157 [2023-08-30 12:01:10,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 12:01:10,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 12:01:10,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 12:01:10,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 12:01:10,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:10" (1/1) ... [2023-08-30 12:01:10,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:10" (1/1) ... [2023-08-30 12:01:10,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:10" (1/1) ... [2023-08-30 12:01:10,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:10" (1/1) ... [2023-08-30 12:01:10,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:10" (1/1) ... [2023-08-30 12:01:10,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:10" (1/1) ... [2023-08-30 12:01:10,148 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:10" (1/1) ... [2023-08-30 12:01:10,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:10" (1/1) ... [2023-08-30 12:01:10,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 12:01:10,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 12:01:10,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 12:01:10,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 12:01:10,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:10" (1/1) ... [2023-08-30 12:01:10,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 12:01:10,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:01:10,194 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 12:01:10,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 12:01:10,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 12:01:10,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 12:01:10,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 12:01:10,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 12:01:10,234 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 12:01:10,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 12:01:10,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 12:01:10,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 12:01:10,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 12:01:10,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 12:01:10,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 12:01:10,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 12:01:10,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 12:01:10,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 12:01:10,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 12:01:10,237 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 12:01:10,359 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 12:01:10,362 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 12:01:10,685 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 12:01:10,823 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 12:01:10,823 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 12:01:10,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:01:10 BoogieIcfgContainer [2023-08-30 12:01:10,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 12:01:10,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 12:01:10,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 12:01:10,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 12:01:10,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:01:09" (1/3) ... [2023-08-30 12:01:10,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e99b5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:01:10, skipping insertion in model container [2023-08-30 12:01:10,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:10" (2/3) ... [2023-08-30 12:01:10,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e99b5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:01:10, skipping insertion in model container [2023-08-30 12:01:10,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:01:10" (3/3) ... [2023-08-30 12:01:10,833 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2023-08-30 12:01:10,840 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 12:01:10,851 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 12:01:10,852 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-30 12:01:10,852 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 12:01:10,948 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 12:01:10,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 137 transitions, 290 flow [2023-08-30 12:01:11,083 INFO L130 PetriNetUnfolder]: 11/135 cut-off events. [2023-08-30 12:01:11,084 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 12:01:11,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 135 events. 11/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 131 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-08-30 12:01:11,089 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 137 transitions, 290 flow [2023-08-30 12:01:11,095 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 119 transitions, 247 flow [2023-08-30 12:01:11,099 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 12:01:11,117 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 116 places, 119 transitions, 247 flow [2023-08-30 12:01:11,120 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 116 places, 119 transitions, 247 flow [2023-08-30 12:01:11,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 119 transitions, 247 flow [2023-08-30 12:01:11,161 INFO L130 PetriNetUnfolder]: 10/119 cut-off events. [2023-08-30 12:01:11,162 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 12:01:11,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 119 events. 10/119 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 123 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-08-30 12:01:11,166 INFO L119 LiptonReduction]: Number of co-enabled transitions 1184 [2023-08-30 12:01:16,101 INFO L134 LiptonReduction]: Checked pairs total: 1313 [2023-08-30 12:01:16,101 INFO L136 LiptonReduction]: Total number of compositions: 137 [2023-08-30 12:01:16,114 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 12:01:16,120 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;@1319777, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 12:01:16,120 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-08-30 12:01:16,122 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 12:01:16,123 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 12:01:16,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:01:16,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 12:01:16,124 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:01:16,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:01:16,129 INFO L85 PathProgramCache]: Analyzing trace with hash 20161, now seen corresponding path program 1 times [2023-08-30 12:01:16,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:01:16,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309555035] [2023-08-30 12:01:16,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:16,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:01:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:16,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:01:16,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309555035] [2023-08-30 12:01:16,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309555035] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:01:16,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 12:01:16,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 12:01:16,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025382176] [2023-08-30 12:01:16,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:01:16,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 12:01:16,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:01:16,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 12:01:16,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 12:01:16,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 274 [2023-08-30 12:01:16,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:16,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:01:16,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 274 [2023-08-30 12:01:16,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:01:16,647 INFO L130 PetriNetUnfolder]: 215/361 cut-off events. [2023-08-30 12:01:16,647 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-30 12:01:16,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 361 events. 215/361 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 1511 event pairs, 126 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 305. Up to 178 conditions per place. [2023-08-30 12:01:16,654 INFO L137 encePairwiseOnDemand]: 267/274 looper letters, 35 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-08-30 12:01:16,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 38 transitions, 168 flow [2023-08-30 12:01:16,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 12:01:16,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 12:01:16,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-08-30 12:01:16,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45985401459854014 [2023-08-30 12:01:16,706 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-08-30 12:01:16,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-08-30 12:01:16,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:01:16,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-08-30 12:01:16,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:16,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:16,729 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:16,731 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 57 flow. Second operand 3 states and 378 transitions. [2023-08-30 12:01:16,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 38 transitions, 168 flow [2023-08-30 12:01:16,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 38 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 12:01:16,752 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 60 flow [2023-08-30 12:01:16,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2023-08-30 12:01:16,762 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2023-08-30 12:01:16,770 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 60 flow [2023-08-30 12:01:16,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:16,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:01:16,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 12:01:16,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 12:01:16,777 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:01:16,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:01:16,778 INFO L85 PathProgramCache]: Analyzing trace with hash 626251, now seen corresponding path program 1 times [2023-08-30 12:01:16,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:01:16,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288315939] [2023-08-30 12:01:16,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:16,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:01:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:16,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:01:16,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288315939] [2023-08-30 12:01:16,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288315939] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:01:16,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105422295] [2023-08-30 12:01:16,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:16,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:01:16,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:01:16,851 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:01:16,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 12:01:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:16,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 12:01:16,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:01:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:17,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:01:17,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:17,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105422295] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:01:17,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:01:17,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 12:01:17,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492406446] [2023-08-30 12:01:17,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:01:17,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 12:01:17,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:01:17,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 12:01:17,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 12:01:17,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 274 [2023-08-30 12:01:17,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 60 flow. Second operand has 7 states, 7 states have (on average 112.14285714285714) internal successors, (785), 7 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:17,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:01:17,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 274 [2023-08-30 12:01:17,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:01:17,354 INFO L130 PetriNetUnfolder]: 539/901 cut-off events. [2023-08-30 12:01:17,354 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 12:01:17,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1848 conditions, 901 events. 539/901 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 4607 event pairs, 315 based on Foata normal form. 0/386 useless extension candidates. Maximal degree in co-relation 1475. Up to 177 conditions per place. [2023-08-30 12:01:17,364 INFO L137 encePairwiseOnDemand]: 270/274 looper letters, 82 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2023-08-30 12:01:17,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 92 transitions, 410 flow [2023-08-30 12:01:17,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 12:01:17,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 12:01:17,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 871 transitions. [2023-08-30 12:01:17,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.454118873826903 [2023-08-30 12:01:17,369 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 871 transitions. [2023-08-30 12:01:17,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 871 transitions. [2023-08-30 12:01:17,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:01:17,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 871 transitions. [2023-08-30 12:01:17,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.42857142857143) internal successors, (871), 7 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:17,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 274.0) internal successors, (2192), 8 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:17,385 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 274.0) internal successors, (2192), 8 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:17,386 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 60 flow. Second operand 7 states and 871 transitions. [2023-08-30 12:01:17,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 92 transitions, 410 flow [2023-08-30 12:01:17,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 92 transitions, 408 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 12:01:17,388 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 117 flow [2023-08-30 12:01:17,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=117, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-08-30 12:01:17,389 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2023-08-30 12:01:17,389 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 117 flow [2023-08-30 12:01:17,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 112.14285714285714) internal successors, (785), 7 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:17,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:01:17,390 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-08-30 12:01:17,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 12:01:17,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:01:17,599 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:01:17,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:01:17,600 INFO L85 PathProgramCache]: Analyzing trace with hash 19414753, now seen corresponding path program 1 times [2023-08-30 12:01:17,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:01:17,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602911878] [2023-08-30 12:01:17,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:17,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:01:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:01:17,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:01:17,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602911878] [2023-08-30 12:01:17,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602911878] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:01:17,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 12:01:17,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 12:01:17,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999783054] [2023-08-30 12:01:17,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:01:17,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 12:01:17,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:01:17,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 12:01:17,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 12:01:17,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 274 [2023-08-30 12:01:17,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:17,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:01:17,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 274 [2023-08-30 12:01:17,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:01:17,832 INFO L130 PetriNetUnfolder]: 536/897 cut-off events. [2023-08-30 12:01:17,833 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 12:01:17,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1850 conditions, 897 events. 536/897 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 4628 event pairs, 315 based on Foata normal form. 2/369 useless extension candidates. Maximal degree in co-relation 1100. Up to 872 conditions per place. [2023-08-30 12:01:17,838 INFO L137 encePairwiseOnDemand]: 272/274 looper letters, 22 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-08-30 12:01:17,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 24 transitions, 136 flow [2023-08-30 12:01:17,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 12:01:17,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 12:01:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2023-08-30 12:01:17,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42944038929440387 [2023-08-30 12:01:17,840 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2023-08-30 12:01:17,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2023-08-30 12:01:17,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:01:17,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2023-08-30 12:01:17,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:17,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:17,844 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:17,844 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 117 flow. Second operand 3 states and 353 transitions. [2023-08-30 12:01:17,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 24 transitions, 136 flow [2023-08-30 12:01:17,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 24 transitions, 128 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 12:01:17,846 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 84 flow [2023-08-30 12:01:17,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=30, 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=84, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-08-30 12:01:17,848 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2023-08-30 12:01:17,848 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 84 flow [2023-08-30 12:01:17,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:17,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:01:17,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 12:01:17,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 12:01:17,850 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:01:17,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:01:17,851 INFO L85 PathProgramCache]: Analyzing trace with hash 19393452, now seen corresponding path program 1 times [2023-08-30 12:01:17,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:01:17,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841630234] [2023-08-30 12:01:17,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:17,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:01:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:17,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:01:17,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841630234] [2023-08-30 12:01:17,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841630234] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:01:17,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 12:01:17,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 12:01:17,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457679220] [2023-08-30 12:01:17,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:01:17,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 12:01:17,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:01:17,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 12:01:17,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 12:01:17,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 274 [2023-08-30 12:01:17,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:17,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:01:17,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 274 [2023-08-30 12:01:17,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:01:18,121 INFO L130 PetriNetUnfolder]: 476/877 cut-off events. [2023-08-30 12:01:18,121 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-30 12:01:18,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1793 conditions, 877 events. 476/877 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 4820 event pairs, 195 based on Foata normal form. 0/437 useless extension candidates. Maximal degree in co-relation 1781. Up to 611 conditions per place. [2023-08-30 12:01:18,125 INFO L137 encePairwiseOnDemand]: 268/274 looper letters, 28 selfloop transitions, 2 changer transitions 1/32 dead transitions. [2023-08-30 12:01:18,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 163 flow [2023-08-30 12:01:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 12:01:18,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 12:01:18,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 355 transitions. [2023-08-30 12:01:18,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318734793187348 [2023-08-30 12:01:18,128 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 355 transitions. [2023-08-30 12:01:18,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 355 transitions. [2023-08-30 12:01:18,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:01:18,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 355 transitions. [2023-08-30 12:01:18,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:18,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:18,131 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:18,132 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 84 flow. Second operand 3 states and 355 transitions. [2023-08-30 12:01:18,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 163 flow [2023-08-30 12:01:18,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 32 transitions, 162 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 12:01:18,134 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 101 flow [2023-08-30 12:01:18,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=83, 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=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-08-30 12:01:18,136 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2023-08-30 12:01:18,136 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 101 flow [2023-08-30 12:01:18,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:18,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:01:18,137 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 12:01:18,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 12:01:18,137 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:01:18,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:01:18,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1477748490, now seen corresponding path program 2 times [2023-08-30 12:01:18,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:01:18,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971375977] [2023-08-30 12:01:18,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:18,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:01:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:18,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:01:18,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971375977] [2023-08-30 12:01:18,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971375977] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:01:18,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428842501] [2023-08-30 12:01:18,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 12:01:18,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:01:18,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:01:18,205 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:01:18,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 12:01:18,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 12:01:18,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:01:18,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 12:01:18,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:01:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 12:01:18,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 12:01:18,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428842501] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:01:18,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 12:01:18,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 12:01:18,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48188778] [2023-08-30 12:01:18,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:01:18,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 12:01:18,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:01:18,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 12:01:18,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 12:01:18,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 274 [2023-08-30 12:01:18,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:18,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:01:18,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 274 [2023-08-30 12:01:18,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:01:18,426 INFO L130 PetriNetUnfolder]: 476/876 cut-off events. [2023-08-30 12:01:18,427 INFO L131 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2023-08-30 12:01:18,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2069 conditions, 876 events. 476/876 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 4867 event pairs, 375 based on Foata normal form. 1/557 useless extension candidates. Maximal degree in co-relation 2055. Up to 866 conditions per place. [2023-08-30 12:01:18,431 INFO L137 encePairwiseOnDemand]: 272/274 looper letters, 22 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-08-30 12:01:18,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 24 transitions, 137 flow [2023-08-30 12:01:18,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 12:01:18,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 12:01:18,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 355 transitions. [2023-08-30 12:01:18,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318734793187348 [2023-08-30 12:01:18,433 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 355 transitions. [2023-08-30 12:01:18,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 355 transitions. [2023-08-30 12:01:18,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:01:18,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 355 transitions. [2023-08-30 12:01:18,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:18,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:18,436 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:18,437 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 101 flow. Second operand 3 states and 355 transitions. [2023-08-30 12:01:18,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 24 transitions, 137 flow [2023-08-30 12:01:18,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 24 transitions, 125 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-30 12:01:18,440 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 81 flow [2023-08-30 12:01:18,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=28, 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=81, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-08-30 12:01:18,443 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2023-08-30 12:01:18,446 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 81 flow [2023-08-30 12:01:18,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:18,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:01:18,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:01:18,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 12:01:18,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:01:18,654 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:01:18,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:01:18,655 INFO L85 PathProgramCache]: Analyzing trace with hash -2069859903, now seen corresponding path program 1 times [2023-08-30 12:01:18,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:01:18,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202188305] [2023-08-30 12:01:18,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:18,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:01:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:18,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:01:18,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202188305] [2023-08-30 12:01:18,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202188305] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:01:18,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 12:01:18,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 12:01:18,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692832693] [2023-08-30 12:01:18,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:01:18,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 12:01:18,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:01:18,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 12:01:18,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 12:01:18,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 274 [2023-08-30 12:01:18,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 81 flow. Second operand has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:18,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:01:18,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 274 [2023-08-30 12:01:18,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:01:18,884 INFO L130 PetriNetUnfolder]: 390/730 cut-off events. [2023-08-30 12:01:18,885 INFO L131 PetriNetUnfolder]: For 86/86 co-relation queries the response was YES. [2023-08-30 12:01:18,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1689 conditions, 730 events. 390/730 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 3929 event pairs, 309 based on Foata normal form. 4/492 useless extension candidates. Maximal degree in co-relation 1678. Up to 694 conditions per place. [2023-08-30 12:01:18,888 INFO L137 encePairwiseOnDemand]: 268/274 looper letters, 21 selfloop transitions, 2 changer transitions 9/33 dead transitions. [2023-08-30 12:01:18,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 167 flow [2023-08-30 12:01:18,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 12:01:18,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 12:01:18,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 463 transitions. [2023-08-30 12:01:18,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42244525547445255 [2023-08-30 12:01:18,891 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 463 transitions. [2023-08-30 12:01:18,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 463 transitions. [2023-08-30 12:01:18,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:01:18,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 463 transitions. [2023-08-30 12:01:18,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:18,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:18,895 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:18,895 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 81 flow. Second operand 4 states and 463 transitions. [2023-08-30 12:01:18,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 167 flow [2023-08-30 12:01:18,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 33 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 12:01:18,897 INFO L231 Difference]: Finished difference. Result has 34 places, 24 transitions, 94 flow [2023-08-30 12:01:18,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=34, PETRI_TRANSITIONS=24} [2023-08-30 12:01:18,898 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2023-08-30 12:01:18,898 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 24 transitions, 94 flow [2023-08-30 12:01:18,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:18,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:01:18,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:01:18,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 12:01:18,899 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:01:18,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:01:18,899 INFO L85 PathProgramCache]: Analyzing trace with hash 2141698787, now seen corresponding path program 1 times [2023-08-30 12:01:18,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:01:18,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355935156] [2023-08-30 12:01:18,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:18,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:01:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:18,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:01:18,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355935156] [2023-08-30 12:01:18,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355935156] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:01:18,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285084140] [2023-08-30 12:01:18,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:18,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:01:18,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:01:18,985 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:01:19,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 12:01:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:19,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 12:01:19,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:01:19,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:01:19,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 12:01:19,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285084140] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:01:19,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 12:01:19,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-30 12:01:19,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297400053] [2023-08-30 12:01:19,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:01:19,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 12:01:19,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:01:19,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 12:01:19,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 12:01:19,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 274 [2023-08-30 12:01:19,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 24 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:19,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:01:19,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 274 [2023-08-30 12:01:19,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:01:19,159 INFO L130 PetriNetUnfolder]: 173/334 cut-off events. [2023-08-30 12:01:19,160 INFO L131 PetriNetUnfolder]: For 160/160 co-relation queries the response was YES. [2023-08-30 12:01:19,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 839 conditions, 334 events. 173/334 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1446 event pairs, 116 based on Foata normal form. 56/342 useless extension candidates. Maximal degree in co-relation 825. Up to 326 conditions per place. [2023-08-30 12:01:19,161 INFO L137 encePairwiseOnDemand]: 270/274 looper letters, 16 selfloop transitions, 1 changer transitions 3/21 dead transitions. [2023-08-30 12:01:19,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 21 transitions, 122 flow [2023-08-30 12:01:19,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 12:01:19,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 12:01:19,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 354 transitions. [2023-08-30 12:01:19,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4306569343065693 [2023-08-30 12:01:19,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 354 transitions. [2023-08-30 12:01:19,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 354 transitions. [2023-08-30 12:01:19,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:01:19,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 354 transitions. [2023-08-30 12:01:19,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:19,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:19,167 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:19,167 INFO L175 Difference]: Start difference. First operand has 34 places, 24 transitions, 94 flow. Second operand 3 states and 354 transitions. [2023-08-30 12:01:19,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 21 transitions, 122 flow [2023-08-30 12:01:19,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 21 transitions, 114 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 12:01:19,170 INFO L231 Difference]: Finished difference. Result has 29 places, 18 transitions, 69 flow [2023-08-30 12:01:19,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=29, PETRI_TRANSITIONS=18} [2023-08-30 12:01:19,171 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2023-08-30 12:01:19,171 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 18 transitions, 69 flow [2023-08-30 12:01:19,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:19,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:01:19,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:01:19,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 12:01:19,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:01:19,378 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:01:19,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:01:19,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1968153553, now seen corresponding path program 1 times [2023-08-30 12:01:19,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:01:19,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597131972] [2023-08-30 12:01:19,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:19,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:01:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:19,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:01:19,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597131972] [2023-08-30 12:01:19,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597131972] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:01:19,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022551676] [2023-08-30 12:01:19,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:19,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:01:19,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:01:19,974 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:01:19,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 12:01:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:20,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 12:01:20,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:01:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:20,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:01:20,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:01:20,412 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 60 treesize of output 44 [2023-08-30 12:01:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:20,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022551676] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:01:20,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:01:20,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-08-30 12:01:20,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426519313] [2023-08-30 12:01:20,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:01:20,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 12:01:20,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:01:20,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 12:01:20,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-08-30 12:01:21,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 274 [2023-08-30 12:01:21,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 18 transitions, 69 flow. Second operand has 15 states, 15 states have (on average 91.6) internal successors, (1374), 15 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:21,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:01:21,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 274 [2023-08-30 12:01:21,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:01:21,542 INFO L130 PetriNetUnfolder]: 157/282 cut-off events. [2023-08-30 12:01:21,543 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-30 12:01:21,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 744 conditions, 282 events. 157/282 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1009 event pairs, 10 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 731. Up to 153 conditions per place. [2023-08-30 12:01:21,545 INFO L137 encePairwiseOnDemand]: 267/274 looper letters, 31 selfloop transitions, 14 changer transitions 1/47 dead transitions. [2023-08-30 12:01:21,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 47 transitions, 250 flow [2023-08-30 12:01:21,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 12:01:21,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 12:01:21,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 948 transitions. [2023-08-30 12:01:21,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.345985401459854 [2023-08-30 12:01:21,549 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 948 transitions. [2023-08-30 12:01:21,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 948 transitions. [2023-08-30 12:01:21,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:01:21,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 948 transitions. [2023-08-30 12:01:21,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 94.8) internal successors, (948), 10 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:21,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 274.0) internal successors, (3014), 11 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:21,555 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 274.0) internal successors, (3014), 11 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:21,556 INFO L175 Difference]: Start difference. First operand has 29 places, 18 transitions, 69 flow. Second operand 10 states and 948 transitions. [2023-08-30 12:01:21,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 47 transitions, 250 flow [2023-08-30 12:01:21,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 47 transitions, 249 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 12:01:21,557 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 180 flow [2023-08-30 12:01:21,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=180, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-08-30 12:01:21,558 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 12 predicate places. [2023-08-30 12:01:21,558 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 180 flow [2023-08-30 12:01:21,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 91.6) internal successors, (1374), 15 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:21,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:01:21,559 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:01:21,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 12:01:21,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:01:21,772 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:01:21,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:01:21,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1609976147, now seen corresponding path program 1 times [2023-08-30 12:01:21,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:01:21,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837636201] [2023-08-30 12:01:21,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:21,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:01:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:21,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:01:21,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837636201] [2023-08-30 12:01:21,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837636201] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:01:21,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879667101] [2023-08-30 12:01:21,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:21,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:01:21,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:01:21,949 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:01:21,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 12:01:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:22,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 12:01:22,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:01:22,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 98 [2023-08-30 12:01:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:22,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:01:22,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 110 [2023-08-30 12:01:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:22,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879667101] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:01:22,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:01:22,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 12:01:22,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826882448] [2023-08-30 12:01:22,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:01:22,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 12:01:22,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:01:22,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 12:01:22,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-30 12:01:22,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 274 [2023-08-30 12:01:22,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 180 flow. Second operand has 12 states, 12 states have (on average 105.83333333333333) internal successors, (1270), 12 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:22,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:01:22,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 274 [2023-08-30 12:01:22,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:01:22,664 INFO L130 PetriNetUnfolder]: 113/214 cut-off events. [2023-08-30 12:01:22,665 INFO L131 PetriNetUnfolder]: For 273/273 co-relation queries the response was YES. [2023-08-30 12:01:22,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 793 conditions, 214 events. 113/214 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 707 event pairs, 52 based on Foata normal form. 8/208 useless extension candidates. Maximal degree in co-relation 773. Up to 167 conditions per place. [2023-08-30 12:01:22,666 INFO L137 encePairwiseOnDemand]: 270/274 looper letters, 26 selfloop transitions, 5 changer transitions 1/33 dead transitions. [2023-08-30 12:01:22,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 33 transitions, 240 flow [2023-08-30 12:01:22,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 12:01:22,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 12:01:22,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 651 transitions. [2023-08-30 12:01:22,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.395985401459854 [2023-08-30 12:01:22,669 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 651 transitions. [2023-08-30 12:01:22,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 651 transitions. [2023-08-30 12:01:22,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:01:22,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 651 transitions. [2023-08-30 12:01:22,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 108.5) internal successors, (651), 6 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:22,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 274.0) internal successors, (1918), 7 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:22,674 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 274.0) internal successors, (1918), 7 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:22,674 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 180 flow. Second operand 6 states and 651 transitions. [2023-08-30 12:01:22,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 33 transitions, 240 flow [2023-08-30 12:01:22,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 224 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-30 12:01:22,676 INFO L231 Difference]: Finished difference. Result has 41 places, 25 transitions, 145 flow [2023-08-30 12:01:22,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=145, PETRI_PLACES=41, PETRI_TRANSITIONS=25} [2023-08-30 12:01:22,677 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 13 predicate places. [2023-08-30 12:01:22,677 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 25 transitions, 145 flow [2023-08-30 12:01:22,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 105.83333333333333) internal successors, (1270), 12 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:22,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:01:22,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:01:22,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 12:01:22,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:01:22,885 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:01:22,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:01:22,885 INFO L85 PathProgramCache]: Analyzing trace with hash 883218656, now seen corresponding path program 2 times [2023-08-30 12:01:22,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:01:22,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056742532] [2023-08-30 12:01:22,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:22,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:01:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:23,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:01:23,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056742532] [2023-08-30 12:01:23,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056742532] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:01:23,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208491315] [2023-08-30 12:01:23,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 12:01:23,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:01:23,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:01:23,109 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:01:23,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 12:01:23,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 12:01:23,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:01:23,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 12:01:23,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:01:23,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:23,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:01:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:23,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208491315] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:01:23,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:01:23,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-30 12:01:23,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359768122] [2023-08-30 12:01:23,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:01:23,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 12:01:23,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:01:23,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 12:01:23,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-08-30 12:01:23,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 274 [2023-08-30 12:01:23,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 25 transitions, 145 flow. Second operand has 17 states, 17 states have (on average 103.58823529411765) internal successors, (1761), 17 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:23,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:01:23,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 274 [2023-08-30 12:01:23,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:01:23,824 INFO L130 PetriNetUnfolder]: 101/194 cut-off events. [2023-08-30 12:01:23,824 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2023-08-30 12:01:23,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 699 conditions, 194 events. 101/194 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 620 event pairs, 46 based on Foata normal form. 12/192 useless extension candidates. Maximal degree in co-relation 679. Up to 167 conditions per place. [2023-08-30 12:01:23,825 INFO L137 encePairwiseOnDemand]: 267/274 looper letters, 16 selfloop transitions, 3 changer transitions 12/32 dead transitions. [2023-08-30 12:01:23,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 32 transitions, 214 flow [2023-08-30 12:01:23,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 12:01:23,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 12:01:23,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 743 transitions. [2023-08-30 12:01:23,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38738269030239836 [2023-08-30 12:01:23,828 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 743 transitions. [2023-08-30 12:01:23,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 743 transitions. [2023-08-30 12:01:23,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:01:23,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 743 transitions. [2023-08-30 12:01:23,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 106.14285714285714) internal successors, (743), 7 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:23,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 274.0) internal successors, (2192), 8 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:23,834 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 274.0) internal successors, (2192), 8 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:23,834 INFO L175 Difference]: Start difference. First operand has 41 places, 25 transitions, 145 flow. Second operand 7 states and 743 transitions. [2023-08-30 12:01:23,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 32 transitions, 214 flow [2023-08-30 12:01:23,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 32 transitions, 203 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-30 12:01:23,836 INFO L231 Difference]: Finished difference. Result has 42 places, 20 transitions, 111 flow [2023-08-30 12:01:23,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=111, PETRI_PLACES=42, PETRI_TRANSITIONS=20} [2023-08-30 12:01:23,836 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 14 predicate places. [2023-08-30 12:01:23,836 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 20 transitions, 111 flow [2023-08-30 12:01:23,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 103.58823529411765) internal successors, (1761), 17 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:23,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:01:23,837 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:01:23,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 12:01:24,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:01:24,044 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:01:24,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:01:24,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1451554975, now seen corresponding path program 3 times [2023-08-30 12:01:24,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:01:24,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228115434] [2023-08-30 12:01:24,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:24,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:01:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:24,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:01:24,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:01:24,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228115434] [2023-08-30 12:01:24,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228115434] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:01:24,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 12:01:24,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 12:01:24,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760518088] [2023-08-30 12:01:24,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:01:24,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 12:01:24,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:01:24,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 12:01:24,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 12:01:24,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 274 [2023-08-30 12:01:24,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 20 transitions, 111 flow. Second operand has 4 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:24,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:01:24,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 274 [2023-08-30 12:01:24,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:01:24,256 INFO L130 PetriNetUnfolder]: 184/321 cut-off events. [2023-08-30 12:01:24,257 INFO L131 PetriNetUnfolder]: For 498/498 co-relation queries the response was YES. [2023-08-30 12:01:24,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1172 conditions, 321 events. 184/321 cut-off events. For 498/498 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1153 event pairs, 33 based on Foata normal form. 36/327 useless extension candidates. Maximal degree in co-relation 1152. Up to 181 conditions per place. [2023-08-30 12:01:24,259 INFO L137 encePairwiseOnDemand]: 269/274 looper letters, 23 selfloop transitions, 6 changer transitions 1/31 dead transitions. [2023-08-30 12:01:24,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 31 transitions, 231 flow [2023-08-30 12:01:24,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 12:01:24,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 12:01:24,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 464 transitions. [2023-08-30 12:01:24,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4233576642335766 [2023-08-30 12:01:24,261 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 464 transitions. [2023-08-30 12:01:24,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 464 transitions. [2023-08-30 12:01:24,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:01:24,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 464 transitions. [2023-08-30 12:01:24,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:24,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:24,265 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:24,265 INFO L175 Difference]: Start difference. First operand has 42 places, 20 transitions, 111 flow. Second operand 4 states and 464 transitions. [2023-08-30 12:01:24,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 31 transitions, 231 flow [2023-08-30 12:01:24,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 31 transitions, 201 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-08-30 12:01:24,268 INFO L231 Difference]: Finished difference. Result has 34 places, 24 transitions, 148 flow [2023-08-30 12:01:24,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=34, PETRI_TRANSITIONS=24} [2023-08-30 12:01:24,268 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2023-08-30 12:01:24,269 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 24 transitions, 148 flow [2023-08-30 12:01:24,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:24,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:01:24,269 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:01:24,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 12:01:24,270 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:01:24,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:01:24,270 INFO L85 PathProgramCache]: Analyzing trace with hash -878108369, now seen corresponding path program 1 times [2023-08-30 12:01:24,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:01:24,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983862348] [2023-08-30 12:01:24,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:24,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:01:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:25,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:01:25,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983862348] [2023-08-30 12:01:25,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983862348] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:01:25,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239460714] [2023-08-30 12:01:25,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:25,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:01:25,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:01:25,159 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:01:25,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 12:01:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:25,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 12:01:25,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:01:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:01:25,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:01:25,432 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:01:25,433 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 61 treesize of output 45 [2023-08-30 12:01:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:01:25,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239460714] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 12:01:25,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 12:01:25,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7, 3] total 12 [2023-08-30 12:01:25,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725538286] [2023-08-30 12:01:25,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:01:25,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 12:01:25,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:01:25,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 12:01:25,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-08-30 12:01:25,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 274 [2023-08-30 12:01:25,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 24 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:25,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:01:25,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 274 [2023-08-30 12:01:25,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:01:25,627 INFO L130 PetriNetUnfolder]: 160/297 cut-off events. [2023-08-30 12:01:25,628 INFO L131 PetriNetUnfolder]: For 423/423 co-relation queries the response was YES. [2023-08-30 12:01:25,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1138 conditions, 297 events. 160/297 cut-off events. For 423/423 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1111 event pairs, 15 based on Foata normal form. 24/315 useless extension candidates. Maximal degree in co-relation 1120. Up to 163 conditions per place. [2023-08-30 12:01:25,630 INFO L137 encePairwiseOnDemand]: 269/274 looper letters, 22 selfloop transitions, 5 changer transitions 1/29 dead transitions. [2023-08-30 12:01:25,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 29 transitions, 219 flow [2023-08-30 12:01:25,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 12:01:25,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 12:01:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 436 transitions. [2023-08-30 12:01:25,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978102189781022 [2023-08-30 12:01:25,633 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 436 transitions. [2023-08-30 12:01:25,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 436 transitions. [2023-08-30 12:01:25,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:01:25,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 436 transitions. [2023-08-30 12:01:25,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:25,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:25,636 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:25,636 INFO L175 Difference]: Start difference. First operand has 34 places, 24 transitions, 148 flow. Second operand 4 states and 436 transitions. [2023-08-30 12:01:25,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 29 transitions, 219 flow [2023-08-30 12:01:25,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 29 transitions, 219 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 12:01:25,639 INFO L231 Difference]: Finished difference. Result has 37 places, 23 transitions, 152 flow [2023-08-30 12:01:25,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=37, PETRI_TRANSITIONS=23} [2023-08-30 12:01:25,640 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2023-08-30 12:01:25,640 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 23 transitions, 152 flow [2023-08-30 12:01:25,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:25,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:01:25,641 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:01:25,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 12:01:25,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:01:25,851 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:01:25,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:01:25,852 INFO L85 PathProgramCache]: Analyzing trace with hash -2048529678, now seen corresponding path program 4 times [2023-08-30 12:01:25,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:01:25,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899624492] [2023-08-30 12:01:25,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:25,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:01:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:27,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:01:27,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899624492] [2023-08-30 12:01:27,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899624492] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:01:27,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803205766] [2023-08-30 12:01:27,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 12:01:27,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:01:27,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:01:27,162 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:01:27,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 12:01:27,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 12:01:27,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:01:27,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 12:01:27,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:01:27,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 12:01:27,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:01:27,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 12:01:27,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:01:27,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 12:01:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:27,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:01:28,633 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:01:28,634 INFO L350 Elim1Store]: Elim1 eliminated variable 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 124 treesize of output 88 [2023-08-30 12:01:28,681 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:01:28,681 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 283 treesize of output 313 [2023-08-30 12:01:28,716 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:01:28,717 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 236 treesize of output 220 [2023-08-30 12:01:28,753 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:01:28,754 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 155 treesize of output 165 [2023-08-30 12:01:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:35,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803205766] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:01:35,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:01:35,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 12:01:35,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010758580] [2023-08-30 12:01:35,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:01:35,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 12:01:35,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:01:35,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 12:01:35,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=653, Unknown=1, NotChecked=0, Total=812 [2023-08-30 12:01:36,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 274 [2023-08-30 12:01:36,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 23 transitions, 152 flow. Second operand has 29 states, 29 states have (on average 73.24137931034483) internal successors, (2124), 29 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:36,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:01:36,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 274 [2023-08-30 12:01:36,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:01:44,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:01:45,159 INFO L130 PetriNetUnfolder]: 511/903 cut-off events. [2023-08-30 12:01:45,159 INFO L131 PetriNetUnfolder]: For 2103/2103 co-relation queries the response was YES. [2023-08-30 12:01:45,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3581 conditions, 903 events. 511/903 cut-off events. For 2103/2103 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4163 event pairs, 32 based on Foata normal form. 52/955 useless extension candidates. Maximal degree in co-relation 3561. Up to 501 conditions per place. [2023-08-30 12:01:45,166 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 104 selfloop transitions, 82 changer transitions 6/192 dead transitions. [2023-08-30 12:01:45,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 192 transitions, 1439 flow [2023-08-30 12:01:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-30 12:01:45,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-30 12:01:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3417 transitions. [2023-08-30 12:01:45,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27712895377128954 [2023-08-30 12:01:45,179 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3417 transitions. [2023-08-30 12:01:45,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3417 transitions. [2023-08-30 12:01:45,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:01:45,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3417 transitions. [2023-08-30 12:01:45,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 75.93333333333334) internal successors, (3417), 45 states have internal predecessors, (3417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:45,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 274.0) internal successors, (12604), 46 states have internal predecessors, (12604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:45,206 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 274.0) internal successors, (12604), 46 states have internal predecessors, (12604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:45,206 INFO L175 Difference]: Start difference. First operand has 37 places, 23 transitions, 152 flow. Second operand 45 states and 3417 transitions. [2023-08-30 12:01:45,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 192 transitions, 1439 flow [2023-08-30 12:01:45,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 192 transitions, 1433 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 12:01:45,212 INFO L231 Difference]: Finished difference. Result has 91 places, 111 transitions, 1140 flow [2023-08-30 12:01:45,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1140, PETRI_PLACES=91, PETRI_TRANSITIONS=111} [2023-08-30 12:01:45,214 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 63 predicate places. [2023-08-30 12:01:45,214 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 111 transitions, 1140 flow [2023-08-30 12:01:45,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 73.24137931034483) internal successors, (2124), 29 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:45,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:01:45,215 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:01:45,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 12:01:45,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 12:01:45,422 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:01:45,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:01:45,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2048529677, now seen corresponding path program 1 times [2023-08-30 12:01:45,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:01:45,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082133549] [2023-08-30 12:01:45,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:45,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:01:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:46,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:01:46,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082133549] [2023-08-30 12:01:46,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082133549] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:01:46,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137745976] [2023-08-30 12:01:46,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:46,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:01:46,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:01:46,681 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:01:46,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 12:01:46,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:46,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 12:01:46,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:01:46,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 12:01:46,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-08-30 12:01:46,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:01:46,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 12:01:47,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:01:47,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 12:01:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:47,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:01:48,301 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:01:48,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 155 treesize of output 100 [2023-08-30 12:01:48,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:01:48,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 573 treesize of output 569 [2023-08-30 12:01:48,388 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:01:48,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 180 treesize of output 190 [2023-08-30 12:01:48,423 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:01:48,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 163 [2023-08-30 12:01:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:52,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137745976] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:01:52,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:01:52,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 12:01:52,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943721477] [2023-08-30 12:01:52,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:01:52,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 12:01:52,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:01:52,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 12:01:52,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=640, Unknown=2, NotChecked=0, Total=812 [2023-08-30 12:01:52,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 274 [2023-08-30 12:01:52,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 111 transitions, 1140 flow. Second operand has 29 states, 29 states have (on average 73.24137931034483) internal successors, (2124), 29 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:52,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:01:52,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 274 [2023-08-30 12:01:52,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:01:56,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:01:59,539 INFO L130 PetriNetUnfolder]: 557/1005 cut-off events. [2023-08-30 12:01:59,539 INFO L131 PetriNetUnfolder]: For 5639/5639 co-relation queries the response was YES. [2023-08-30 12:01:59,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5166 conditions, 1005 events. 557/1005 cut-off events. For 5639/5639 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 4982 event pairs, 30 based on Foata normal form. 36/1041 useless extension candidates. Maximal degree in co-relation 5134. Up to 547 conditions per place. [2023-08-30 12:01:59,551 INFO L137 encePairwiseOnDemand]: 264/274 looper letters, 123 selfloop transitions, 68 changer transitions 7/198 dead transitions. [2023-08-30 12:01:59,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 198 transitions, 2072 flow [2023-08-30 12:01:59,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 12:01:59,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 12:01:59,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2487 transitions. [2023-08-30 12:01:59,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27504976775049766 [2023-08-30 12:01:59,559 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2487 transitions. [2023-08-30 12:01:59,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2487 transitions. [2023-08-30 12:01:59,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:01:59,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2487 transitions. [2023-08-30 12:01:59,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 75.36363636363636) internal successors, (2487), 33 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:59,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 274.0) internal successors, (9316), 34 states have internal predecessors, (9316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:59,620 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 274.0) internal successors, (9316), 34 states have internal predecessors, (9316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:59,620 INFO L175 Difference]: Start difference. First operand has 91 places, 111 transitions, 1140 flow. Second operand 33 states and 2487 transitions. [2023-08-30 12:01:59,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 198 transitions, 2072 flow [2023-08-30 12:01:59,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 198 transitions, 1734 flow, removed 163 selfloop flow, removed 6 redundant places. [2023-08-30 12:01:59,646 INFO L231 Difference]: Finished difference. Result has 123 places, 131 transitions, 1273 flow [2023-08-30 12:01:59,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1273, PETRI_PLACES=123, PETRI_TRANSITIONS=131} [2023-08-30 12:01:59,647 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 95 predicate places. [2023-08-30 12:01:59,647 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 131 transitions, 1273 flow [2023-08-30 12:01:59,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 73.24137931034483) internal successors, (2124), 29 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:59,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:01:59,649 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:01:59,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 12:01:59,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 12:01:59,856 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:01:59,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:01:59,857 INFO L85 PathProgramCache]: Analyzing trace with hash -2048502708, now seen corresponding path program 5 times [2023-08-30 12:01:59,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:01:59,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737711175] [2023-08-30 12:01:59,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:59,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:01:59,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:02:00,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:02:00,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737711175] [2023-08-30 12:02:00,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737711175] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:02:00,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984367363] [2023-08-30 12:02:00,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 12:02:00,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:00,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:02:00,984 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:02:00,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 12:02:01,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 12:02:01,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:02:01,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 12:02:01,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:02:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:02:01,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:02:01,648 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 12:02:01,649 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 213 treesize of output 184 [2023-08-30 12:02:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:02:02,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984367363] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:02:02,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:02:02,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 24 [2023-08-30 12:02:02,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470098840] [2023-08-30 12:02:02,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:02:02,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 12:02:02,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:02:02,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 12:02:02,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2023-08-30 12:02:03,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 274 [2023-08-30 12:02:03,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 131 transitions, 1273 flow. Second operand has 26 states, 26 states have (on average 87.38461538461539) internal successors, (2272), 26 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:03,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:02:03,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 274 [2023-08-30 12:02:03,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:02:04,415 INFO L130 PetriNetUnfolder]: 659/1151 cut-off events. [2023-08-30 12:02:04,415 INFO L131 PetriNetUnfolder]: For 8649/8649 co-relation queries the response was YES. [2023-08-30 12:02:04,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5815 conditions, 1151 events. 659/1151 cut-off events. For 8649/8649 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5789 event pairs, 42 based on Foata normal form. 32/1183 useless extension candidates. Maximal degree in co-relation 5778. Up to 449 conditions per place. [2023-08-30 12:02:04,425 INFO L137 encePairwiseOnDemand]: 266/274 looper letters, 133 selfloop transitions, 82 changer transitions 4/219 dead transitions. [2023-08-30 12:02:04,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 219 transitions, 2305 flow [2023-08-30 12:02:04,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 12:02:04,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 12:02:04,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2163 transitions. [2023-08-30 12:02:04,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3289233576642336 [2023-08-30 12:02:04,430 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2163 transitions. [2023-08-30 12:02:04,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2163 transitions. [2023-08-30 12:02:04,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:02:04,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2163 transitions. [2023-08-30 12:02:04,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 90.125) internal successors, (2163), 24 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:04,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 274.0) internal successors, (6850), 25 states have internal predecessors, (6850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:04,441 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 274.0) internal successors, (6850), 25 states have internal predecessors, (6850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:04,441 INFO L175 Difference]: Start difference. First operand has 123 places, 131 transitions, 1273 flow. Second operand 24 states and 2163 transitions. [2023-08-30 12:02:04,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 219 transitions, 2305 flow [2023-08-30 12:02:04,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 219 transitions, 2162 flow, removed 38 selfloop flow, removed 22 redundant places. [2023-08-30 12:02:04,473 INFO L231 Difference]: Finished difference. Result has 129 places, 158 transitions, 1693 flow [2023-08-30 12:02:04,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1693, PETRI_PLACES=129, PETRI_TRANSITIONS=158} [2023-08-30 12:02:04,474 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 101 predicate places. [2023-08-30 12:02:04,474 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 158 transitions, 1693 flow [2023-08-30 12:02:04,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 87.38461538461539) internal successors, (2272), 26 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:04,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:02:04,475 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:02:04,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 12:02:04,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 12:02:04,681 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:02:04,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:02:04,682 INFO L85 PathProgramCache]: Analyzing trace with hash -2048502707, now seen corresponding path program 2 times [2023-08-30 12:02:04,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:02:04,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595819236] [2023-08-30 12:02:04,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:04,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:02:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:02:05,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:02:05,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595819236] [2023-08-30 12:02:05,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595819236] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:02:05,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11713590] [2023-08-30 12:02:05,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 12:02:05,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:05,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:02:05,665 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:02:05,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 12:02:05,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 12:02:05,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:02:05,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 12:02:05,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:02:05,869 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 12:02:05,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 12:02:05,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 12:02:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:02:06,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:02:07,376 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:02:07,376 INFO L350 Elim1Store]: Elim1 eliminated variable 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 151 treesize of output 103 [2023-08-30 12:02:07,406 INFO L321 Elim1Store]: treesize reduction 31, result has 31.1 percent of original size [2023-08-30 12:02:07,406 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 699 treesize of output 630 [2023-08-30 12:02:07,426 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:02:07,427 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:02:07,428 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:02:07,428 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:02:07,434 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:02:07,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 183 [2023-08-30 12:02:07,457 INFO L321 Elim1Store]: treesize reduction 37, result has 17.8 percent of original size [2023-08-30 12:02:07,457 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 209 treesize of output 155 [2023-08-30 12:02:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:02:07,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11713590] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:02:07,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:02:07,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 12:02:07,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441388093] [2023-08-30 12:02:07,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:02:07,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 12:02:07,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:02:07,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 12:02:07,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=619, Unknown=3, NotChecked=0, Total=812 [2023-08-30 12:02:08,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 274 [2023-08-30 12:02:08,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 158 transitions, 1693 flow. Second operand has 29 states, 29 states have (on average 73.24137931034483) internal successors, (2124), 29 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:08,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:02:08,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 274 [2023-08-30 12:02:08,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:02:10,683 INFO L130 PetriNetUnfolder]: 463/839 cut-off events. [2023-08-30 12:02:10,683 INFO L131 PetriNetUnfolder]: For 5317/5317 co-relation queries the response was YES. [2023-08-30 12:02:10,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4420 conditions, 839 events. 463/839 cut-off events. For 5317/5317 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3683 event pairs, 56 based on Foata normal form. 30/869 useless extension candidates. Maximal degree in co-relation 4379. Up to 618 conditions per place. [2023-08-30 12:02:10,691 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 98 selfloop transitions, 43 changer transitions 16/157 dead transitions. [2023-08-30 12:02:10,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 157 transitions, 1669 flow [2023-08-30 12:02:10,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 12:02:10,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 12:02:10,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1813 transitions. [2023-08-30 12:02:10,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2756995133819951 [2023-08-30 12:02:10,696 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1813 transitions. [2023-08-30 12:02:10,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1813 transitions. [2023-08-30 12:02:10,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:02:10,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1813 transitions. [2023-08-30 12:02:10,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 75.54166666666667) internal successors, (1813), 24 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:10,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 274.0) internal successors, (6850), 25 states have internal predecessors, (6850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:10,706 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 274.0) internal successors, (6850), 25 states have internal predecessors, (6850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:10,706 INFO L175 Difference]: Start difference. First operand has 129 places, 158 transitions, 1693 flow. Second operand 24 states and 1813 transitions. [2023-08-30 12:02:10,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 157 transitions, 1669 flow [2023-08-30 12:02:10,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 157 transitions, 1512 flow, removed 56 selfloop flow, removed 14 redundant places. [2023-08-30 12:02:10,727 INFO L231 Difference]: Finished difference. Result has 131 places, 121 transitions, 1225 flow [2023-08-30 12:02:10,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1225, PETRI_PLACES=131, PETRI_TRANSITIONS=121} [2023-08-30 12:02:10,727 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 103 predicate places. [2023-08-30 12:02:10,727 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 121 transitions, 1225 flow [2023-08-30 12:02:10,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 73.24137931034483) internal successors, (2124), 29 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:10,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:02:10,728 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:02:10,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 12:02:10,934 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,SelfDestructingSolverStorable15 [2023-08-30 12:02:10,935 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:02:10,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:02:10,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1619895647, now seen corresponding path program 3 times [2023-08-30 12:02:10,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:02:10,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820675955] [2023-08-30 12:02:10,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:10,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:02:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:02:12,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:02:12,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820675955] [2023-08-30 12:02:12,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820675955] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:02:12,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951654374] [2023-08-30 12:02:12,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 12:02:12,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:12,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:02:12,221 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:02:12,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 12:02:12,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 12:02:12,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:02:12,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 12:02:12,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:02:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 12:02:12,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:02:12,734 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-08-30 12:02:12,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 201 treesize of output 164 [2023-08-30 12:02:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 12:02:12,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951654374] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:02:12,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:02:12,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 20 [2023-08-30 12:02:12,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606253943] [2023-08-30 12:02:12,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:02:12,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 12:02:12,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:02:12,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 12:02:12,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2023-08-30 12:02:13,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 274 [2023-08-30 12:02:13,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 121 transitions, 1225 flow. Second operand has 22 states, 22 states have (on average 88.72727272727273) internal successors, (1952), 22 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:13,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:02:13,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 274 [2023-08-30 12:02:13,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:02:15,987 INFO L130 PetriNetUnfolder]: 657/1157 cut-off events. [2023-08-30 12:02:15,988 INFO L131 PetriNetUnfolder]: For 9875/9875 co-relation queries the response was YES. [2023-08-30 12:02:15,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6160 conditions, 1157 events. 657/1157 cut-off events. For 9875/9875 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5344 event pairs, 20 based on Foata normal form. 48/1205 useless extension candidates. Maximal degree in co-relation 6119. Up to 417 conditions per place. [2023-08-30 12:02:15,999 INFO L137 encePairwiseOnDemand]: 266/274 looper letters, 125 selfloop transitions, 145 changer transitions 9/279 dead transitions. [2023-08-30 12:02:15,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 279 transitions, 3156 flow [2023-08-30 12:02:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 12:02:16,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 12:02:16,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3009 transitions. [2023-08-30 12:02:16,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33278035832780356 [2023-08-30 12:02:16,005 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3009 transitions. [2023-08-30 12:02:16,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3009 transitions. [2023-08-30 12:02:16,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:02:16,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3009 transitions. [2023-08-30 12:02:16,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 91.18181818181819) internal successors, (3009), 33 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:16,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 274.0) internal successors, (9316), 34 states have internal predecessors, (9316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:16,020 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 274.0) internal successors, (9316), 34 states have internal predecessors, (9316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:16,020 INFO L175 Difference]: Start difference. First operand has 131 places, 121 transitions, 1225 flow. Second operand 33 states and 3009 transitions. [2023-08-30 12:02:16,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 279 transitions, 3156 flow [2023-08-30 12:02:16,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 279 transitions, 3015 flow, removed 45 selfloop flow, removed 20 redundant places. [2023-08-30 12:02:16,051 INFO L231 Difference]: Finished difference. Result has 145 places, 201 transitions, 2722 flow [2023-08-30 12:02:16,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2722, PETRI_PLACES=145, PETRI_TRANSITIONS=201} [2023-08-30 12:02:16,052 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 117 predicate places. [2023-08-30 12:02:16,052 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 201 transitions, 2722 flow [2023-08-30 12:02:16,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 88.72727272727273) internal successors, (1952), 22 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:16,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:02:16,053 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:02:16,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-30 12:02:16,258 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,SelfDestructingSolverStorable16 [2023-08-30 12:02:16,259 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:02:16,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:02:16,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1619923517, now seen corresponding path program 6 times [2023-08-30 12:02:16,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:02:16,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193365513] [2023-08-30 12:02:16,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:16,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:02:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 12:02:16,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:02:16,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193365513] [2023-08-30 12:02:16,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193365513] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:02:16,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472936348] [2023-08-30 12:02:16,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 12:02:16,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:16,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:02:16,386 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:02:16,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 12:02:16,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 12:02:16,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:02:16,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 12:02:16,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:02:16,728 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:02:16,728 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 182 treesize of output 132 [2023-08-30 12:02:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 12:02:16,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:02:17,008 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 12:02:17,008 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 205 treesize of output 157 [2023-08-30 12:02:17,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 12:02:17,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472936348] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:02:17,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:02:17,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2023-08-30 12:02:17,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102953601] [2023-08-30 12:02:17,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:02:17,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 12:02:17,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:02:17,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 12:02:17,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-08-30 12:02:17,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 274 [2023-08-30 12:02:17,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 201 transitions, 2722 flow. Second operand has 15 states, 15 states have (on average 104.0) internal successors, (1560), 15 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:17,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:02:17,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 274 [2023-08-30 12:02:17,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:02:17,518 INFO L130 PetriNetUnfolder]: 913/1605 cut-off events. [2023-08-30 12:02:17,518 INFO L131 PetriNetUnfolder]: For 22009/22009 co-relation queries the response was YES. [2023-08-30 12:02:17,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10172 conditions, 1605 events. 913/1605 cut-off events. For 22009/22009 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8134 event pairs, 112 based on Foata normal form. 84/1689 useless extension candidates. Maximal degree in co-relation 10123. Up to 799 conditions per place. [2023-08-30 12:02:17,533 INFO L137 encePairwiseOnDemand]: 268/274 looper letters, 169 selfloop transitions, 119 changer transitions 3/291 dead transitions. [2023-08-30 12:02:17,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 291 transitions, 4579 flow [2023-08-30 12:02:17,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 12:02:17,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 12:02:17,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 862 transitions. [2023-08-30 12:02:17,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39324817518248173 [2023-08-30 12:02:17,535 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 862 transitions. [2023-08-30 12:02:17,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 862 transitions. [2023-08-30 12:02:17,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:02:17,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 862 transitions. [2023-08-30 12:02:17,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 107.75) internal successors, (862), 8 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:17,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 274.0) internal successors, (2466), 9 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:17,538 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 274.0) internal successors, (2466), 9 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:17,538 INFO L175 Difference]: Start difference. First operand has 145 places, 201 transitions, 2722 flow. Second operand 8 states and 862 transitions. [2023-08-30 12:02:17,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 291 transitions, 4579 flow [2023-08-30 12:02:17,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 291 transitions, 4142 flow, removed 163 selfloop flow, removed 13 redundant places. [2023-08-30 12:02:17,622 INFO L231 Difference]: Finished difference. Result has 144 places, 262 transitions, 3770 flow [2023-08-30 12:02:17,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=2402, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3770, PETRI_PLACES=144, PETRI_TRANSITIONS=262} [2023-08-30 12:02:17,623 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 116 predicate places. [2023-08-30 12:02:17,623 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 262 transitions, 3770 flow [2023-08-30 12:02:17,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 104.0) internal successors, (1560), 15 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:17,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:02:17,624 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:02:17,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 12:02:17,830 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,SelfDestructingSolverStorable17 [2023-08-30 12:02:17,830 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:02:17,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:02:17,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1296061942, now seen corresponding path program 7 times [2023-08-30 12:02:17,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:02:17,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391592327] [2023-08-30 12:02:17,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:17,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:02:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:02:18,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:02:18,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391592327] [2023-08-30 12:02:18,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391592327] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:02:18,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429408187] [2023-08-30 12:02:18,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 12:02:18,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:18,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:02:18,424 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:02:18,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 12:02:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:18,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 12:02:18,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:02:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:02:18,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:02:19,468 INFO L321 Elim1Store]: treesize reduction 56, result has 45.6 percent of original size [2023-08-30 12:02:19,468 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 289 treesize of output 216 [2023-08-30 12:02:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 12:02:20,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429408187] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:02:20,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:02:20,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 26 [2023-08-30 12:02:20,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858371050] [2023-08-30 12:02:20,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:02:20,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 12:02:20,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:02:20,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 12:02:20,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2023-08-30 12:02:21,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 274 [2023-08-30 12:02:21,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 262 transitions, 3770 flow. Second operand has 28 states, 28 states have (on average 94.5) internal successors, (2646), 28 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) [2023-08-30 12:02:21,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:02:21,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 274 [2023-08-30 12:02:21,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:02:27,165 INFO L130 PetriNetUnfolder]: 2737/4693 cut-off events. [2023-08-30 12:02:27,165 INFO L131 PetriNetUnfolder]: For 80884/80884 co-relation queries the response was YES. [2023-08-30 12:02:27,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31563 conditions, 4693 events. 2737/4693 cut-off events. For 80884/80884 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 29753 event pairs, 132 based on Foata normal form. 252/4945 useless extension candidates. Maximal degree in co-relation 31508. Up to 2061 conditions per place. [2023-08-30 12:02:27,211 INFO L137 encePairwiseOnDemand]: 266/274 looper letters, 441 selfloop transitions, 446 changer transitions 16/903 dead transitions. [2023-08-30 12:02:27,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 903 transitions, 14326 flow [2023-08-30 12:02:27,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-08-30 12:02:27,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-08-30 12:02:27,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 7502 transitions. [2023-08-30 12:02:27,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3555787278415016 [2023-08-30 12:02:27,230 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 7502 transitions. [2023-08-30 12:02:27,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 7502 transitions. [2023-08-30 12:02:27,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:02:27,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 7502 transitions. [2023-08-30 12:02:27,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 97.42857142857143) internal successors, (7502), 77 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:27,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 274.0) internal successors, (21372), 78 states have internal predecessors, (21372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:27,272 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 274.0) internal successors, (21372), 78 states have internal predecessors, (21372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:27,272 INFO L175 Difference]: Start difference. First operand has 144 places, 262 transitions, 3770 flow. Second operand 77 states and 7502 transitions. [2023-08-30 12:02:27,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 903 transitions, 14326 flow [2023-08-30 12:02:27,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 903 transitions, 13818 flow, removed 249 selfloop flow, removed 1 redundant places. [2023-08-30 12:02:27,521 INFO L231 Difference]: Finished difference. Result has 250 places, 630 transitions, 11662 flow [2023-08-30 12:02:27,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=3600, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=11662, PETRI_PLACES=250, PETRI_TRANSITIONS=630} [2023-08-30 12:02:27,522 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 222 predicate places. [2023-08-30 12:02:27,522 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 630 transitions, 11662 flow [2023-08-30 12:02:27,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 94.5) internal successors, (2646), 28 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) [2023-08-30 12:02:27,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:02:27,523 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:02:27,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-30 12:02:27,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:27,730 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:02:27,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:02:27,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1296061943, now seen corresponding path program 4 times [2023-08-30 12:02:27,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:02:27,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514500982] [2023-08-30 12:02:27,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:27,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:02:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:02:29,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:02:29,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514500982] [2023-08-30 12:02:29,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514500982] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:02:29,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271080098] [2023-08-30 12:02:29,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 12:02:29,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:29,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:02:29,063 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:02:29,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 12:02:29,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 12:02:29,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:02:29,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 12:02:29,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:02:29,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 12:02:29,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:02:29,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 12:02:29,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:02:29,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 12:02:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:02:29,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:02:31,137 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:02:31,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 122 [2023-08-30 12:02:31,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:02:31,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 387 treesize of output 467 [2023-08-30 12:02:31,281 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:02:31,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 328 [2023-08-30 12:02:31,358 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:02:31,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 215 treesize of output 259 [2023-08-30 12:02:56,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:02:56,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271080098] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:02:56,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:02:56,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 35 [2023-08-30 12:02:56,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440123494] [2023-08-30 12:02:56,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:02:56,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-30 12:02:56,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:02:56,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-30 12:02:56,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1071, Unknown=1, NotChecked=0, Total=1332 [2023-08-30 12:02:57,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 274 [2023-08-30 12:02:57,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 630 transitions, 11662 flow. Second operand has 37 states, 37 states have (on average 73.1891891891892) internal successors, (2708), 37 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:57,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:02:57,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 274 [2023-08-30 12:02:57,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:04,070 INFO L130 PetriNetUnfolder]: 3615/6251 cut-off events. [2023-08-30 12:03:04,071 INFO L131 PetriNetUnfolder]: For 153370/153370 co-relation queries the response was YES. [2023-08-30 12:03:04,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50466 conditions, 6251 events. 3615/6251 cut-off events. For 153370/153370 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 41871 event pairs, 213 based on Foata normal form. 244/6495 useless extension candidates. Maximal degree in co-relation 50378. Up to 2875 conditions per place. [2023-08-30 12:03:04,153 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 555 selfloop transitions, 403 changer transitions 11/969 dead transitions. [2023-08-30 12:03:04,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 969 transitions, 19762 flow [2023-08-30 12:03:04,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-30 12:03:04,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-30 12:03:04,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3485 transitions. [2023-08-30 12:03:04,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2764995239606474 [2023-08-30 12:03:04,159 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3485 transitions. [2023-08-30 12:03:04,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3485 transitions. [2023-08-30 12:03:04,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:04,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3485 transitions. [2023-08-30 12:03:04,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 75.76086956521739) internal successors, (3485), 46 states have internal predecessors, (3485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:04,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 274.0) internal successors, (12878), 47 states have internal predecessors, (12878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:04,175 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 274.0) internal successors, (12878), 47 states have internal predecessors, (12878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:04,175 INFO L175 Difference]: Start difference. First operand has 250 places, 630 transitions, 11662 flow. Second operand 46 states and 3485 transitions. [2023-08-30 12:03:04,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 969 transitions, 19762 flow [2023-08-30 12:03:05,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 969 transitions, 15474 flow, removed 1909 selfloop flow, removed 34 redundant places. [2023-08-30 12:03:05,287 INFO L231 Difference]: Finished difference. Result has 270 places, 772 transitions, 13150 flow [2023-08-30 12:03:05,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=7141, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=13150, PETRI_PLACES=270, PETRI_TRANSITIONS=772} [2023-08-30 12:03:05,288 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 242 predicate places. [2023-08-30 12:03:05,288 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 772 transitions, 13150 flow [2023-08-30 12:03:05,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 73.1891891891892) internal successors, (2708), 37 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:05,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:05,289 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:03:05,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 12:03:05,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:05,491 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:03:05,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:05,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1296088913, now seen corresponding path program 5 times [2023-08-30 12:03:05,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:05,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29974848] [2023-08-30 12:03:05,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:05,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:03:06,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:06,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29974848] [2023-08-30 12:03:06,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29974848] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:06,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523524533] [2023-08-30 12:03:06,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 12:03:06,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:06,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:06,761 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:03:06,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 12:03:06,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 12:03:06,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:03:06,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 12:03:06,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:03:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:03:07,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:03:08,145 INFO L321 Elim1Store]: treesize reduction 44, result has 57.3 percent of original size [2023-08-30 12:03:08,145 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 260 treesize of output 226 [2023-08-30 12:03:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:03:09,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523524533] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:03:09,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:03:09,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2023-08-30 12:03:09,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143216785] [2023-08-30 12:03:09,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:03:09,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 12:03:09,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:09,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 12:03:09,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 12:03:11,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 274 [2023-08-30 12:03:11,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 772 transitions, 13150 flow. Second operand has 34 states, 34 states have (on average 87.26470588235294) internal successors, (2967), 34 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:11,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:11,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 274 [2023-08-30 12:03:11,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:20,157 INFO L130 PetriNetUnfolder]: 6251/10743 cut-off events. [2023-08-30 12:03:20,157 INFO L131 PetriNetUnfolder]: For 247201/247201 co-relation queries the response was YES. [2023-08-30 12:03:20,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79606 conditions, 10743 events. 6251/10743 cut-off events. For 247201/247201 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 76730 event pairs, 622 based on Foata normal form. 386/11129 useless extension candidates. Maximal degree in co-relation 79513. Up to 3782 conditions per place. [2023-08-30 12:03:20,265 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 827 selfloop transitions, 746 changer transitions 9/1582 dead transitions. [2023-08-30 12:03:20,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 1582 transitions, 30021 flow [2023-08-30 12:03:20,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-08-30 12:03:20,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-08-30 12:03:20,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 5601 transitions. [2023-08-30 12:03:20,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3297033199905816 [2023-08-30 12:03:20,275 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 5601 transitions. [2023-08-30 12:03:20,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 5601 transitions. [2023-08-30 12:03:20,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:20,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 5601 transitions. [2023-08-30 12:03:20,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 90.33870967741936) internal successors, (5601), 62 states have internal predecessors, (5601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:20,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 274.0) internal successors, (17262), 63 states have internal predecessors, (17262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:20,302 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 274.0) internal successors, (17262), 63 states have internal predecessors, (17262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:20,302 INFO L175 Difference]: Start difference. First operand has 270 places, 772 transitions, 13150 flow. Second operand 62 states and 5601 transitions. [2023-08-30 12:03:20,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 1582 transitions, 30021 flow [2023-08-30 12:03:21,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1582 transitions, 28503 flow, removed 714 selfloop flow, removed 21 redundant places. [2023-08-30 12:03:21,945 INFO L231 Difference]: Finished difference. Result has 339 places, 1312 transitions, 25417 flow [2023-08-30 12:03:21,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=10994, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=25417, PETRI_PLACES=339, PETRI_TRANSITIONS=1312} [2023-08-30 12:03:21,946 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 311 predicate places. [2023-08-30 12:03:21,946 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 1312 transitions, 25417 flow [2023-08-30 12:03:21,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 87.26470588235294) internal successors, (2967), 34 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:21,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:21,947 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:03:21,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 12:03:22,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:22,147 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:03:22,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:22,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1296088912, now seen corresponding path program 8 times [2023-08-30 12:03:22,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:22,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083363510] [2023-08-30 12:03:22,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:22,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:22,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:03:22,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:22,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083363510] [2023-08-30 12:03:22,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083363510] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:22,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443921547] [2023-08-30 12:03:22,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 12:03:22,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:22,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:22,865 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:03:22,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 12:03:22,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 12:03:22,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:03:22,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 12:03:22,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:03:23,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 12:03:23,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:03:23,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 12:03:23,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:03:23,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 12:03:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:03:24,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:03:25,507 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:03:25,507 INFO L350 Elim1Store]: Elim1 eliminated variable 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 395 treesize of output 264 [2023-08-30 12:03:25,632 INFO L321 Elim1Store]: treesize reduction 30, result has 78.7 percent of original size [2023-08-30 12:03:25,633 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 809 treesize of output 807 [2023-08-30 12:03:25,711 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-30 12:03:25,711 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 691 treesize of output 666 [2023-08-30 12:03:25,785 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-30 12:03:25,785 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 611 treesize of output 626 [2023-08-30 12:03:25,872 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-30 12:03:25,873 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 571 treesize of output 546 [2023-08-30 12:03:25,959 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-30 12:03:25,960 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 491 treesize of output 506 [2023-08-30 12:04:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:04:12,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443921547] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:04:12,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:04:12,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-30 12:04:12,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968615029] [2023-08-30 12:04:12,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:04:12,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 12:04:12,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:04:12,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 12:04:12,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=934, Unknown=5, NotChecked=0, Total=1190 [2023-08-30 12:04:13,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 274 [2023-08-30 12:04:13,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 1312 transitions, 25417 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) [2023-08-30 12:04:13,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:04:13,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 274 [2023-08-30 12:04:13,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:04:40,194 WARN L222 SmtUtils]: Spent 19.10s on a formula simplification. DAG size of input: 216 DAG size of output: 138 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 12:04:45,630 INFO L130 PetriNetUnfolder]: 4105/7237 cut-off events. [2023-08-30 12:04:45,630 INFO L131 PetriNetUnfolder]: For 227888/227888 co-relation queries the response was YES. [2023-08-30 12:04:45,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60247 conditions, 7237 events. 4105/7237 cut-off events. For 227888/227888 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 48943 event pairs, 405 based on Foata normal form. 188/7425 useless extension candidates. Maximal degree in co-relation 60130. Up to 5130 conditions per place. [2023-08-30 12:04:45,726 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 731 selfloop transitions, 307 changer transitions 20/1058 dead transitions. [2023-08-30 12:04:45,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 1058 transitions, 21814 flow [2023-08-30 12:04:45,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-08-30 12:04:45,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-08-30 12:04:45,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4563 transitions. [2023-08-30 12:04:45,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27755474452554746 [2023-08-30 12:04:45,733 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4563 transitions. [2023-08-30 12:04:45,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4563 transitions. [2023-08-30 12:04:45,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:04:45,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4563 transitions. [2023-08-30 12:04:45,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 76.05) internal successors, (4563), 60 states have internal predecessors, (4563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:45,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 274.0) internal successors, (16714), 61 states have internal predecessors, (16714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:45,756 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 274.0) internal successors, (16714), 61 states have internal predecessors, (16714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:45,756 INFO L175 Difference]: Start difference. First operand has 339 places, 1312 transitions, 25417 flow. Second operand 60 states and 4563 transitions. [2023-08-30 12:04:45,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 1058 transitions, 21814 flow [2023-08-30 12:04:47,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 1058 transitions, 20181 flow, removed 721 selfloop flow, removed 24 redundant places. [2023-08-30 12:04:47,399 INFO L231 Difference]: Finished difference. Result has 371 places, 945 transitions, 18812 flow [2023-08-30 12:04:47,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=14355, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=18812, PETRI_PLACES=371, PETRI_TRANSITIONS=945} [2023-08-30 12:04:47,400 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 343 predicate places. [2023-08-30 12:04:47,400 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 945 transitions, 18812 flow [2023-08-30 12:04:47,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-08-30 12:04:47,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:04:47,401 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:04:47,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 12:04:47,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:04:47,601 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:04:47,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:04:47,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1322843153, now seen corresponding path program 6 times [2023-08-30 12:04:47,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:04:47,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973828327] [2023-08-30 12:04:47,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:04:47,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:04:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:04:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:04:48,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:04:48,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973828327] [2023-08-30 12:04:48,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973828327] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:04:48,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503616408] [2023-08-30 12:04:48,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 12:04:48,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:04:48,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:04:48,793 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:04:48,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 12:04:48,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 12:04:48,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:04:48,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-30 12:04:48,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:04:49,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 12:04:49,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:04:49,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 12:04:49,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:04:49,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 12:04:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:04:49,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:04:51,960 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:04:51,960 INFO L350 Elim1Store]: Elim1 eliminated variable 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 180 treesize of output 120 [2023-08-30 12:04:52,100 INFO L321 Elim1Store]: treesize reduction 54, result has 66.5 percent of original size [2023-08-30 12:04:52,101 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 787 treesize of output 785 [2023-08-30 12:04:52,150 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:04:52,154 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:04:52,156 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:04:52,157 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:04:52,159 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:04:52,160 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:04:52,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:04:52,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 254 treesize of output 270 [2023-08-30 12:04:52,324 INFO L321 Elim1Store]: treesize reduction 54, result has 50.5 percent of original size [2023-08-30 12:04:52,324 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 251 treesize of output 229 [2023-08-30 12:05:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:05:04,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503616408] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:05:04,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:05:04,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-30 12:05:04,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034847688] [2023-08-30 12:05:04,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:05:04,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-30 12:05:04,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:05:04,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-30 12:05:04,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1102, Unknown=3, NotChecked=0, Total=1406 [2023-08-30 12:05:09,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:05:09,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 274 [2023-08-30 12:05:09,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 945 transitions, 18812 flow. Second operand has 38 states, 38 states have (on average 73.1842105263158) internal successors, (2781), 38 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) [2023-08-30 12:05:09,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:05:09,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 274 [2023-08-30 12:05:09,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:05:23,977 WARN L222 SmtUtils]: Spent 9.32s on a formula simplification. DAG size of input: 179 DAG size of output: 162 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 12:05:40,502 WARN L222 SmtUtils]: Spent 11.27s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 12:05:46,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:06:28,640 WARN L222 SmtUtils]: Spent 40.44s on a formula simplification. DAG size of input: 76 DAG size of output: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 12:07:24,837 WARN L222 SmtUtils]: Spent 47.25s on a formula simplification. DAG size of input: 152 DAG size of output: 150 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 12:07:26,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:07:34,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:07:40,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:07:42,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:07:45,611 INFO L130 PetriNetUnfolder]: 3109/5589 cut-off events. [2023-08-30 12:07:45,612 INFO L131 PetriNetUnfolder]: For 165541/165541 co-relation queries the response was YES. [2023-08-30 12:07:45,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46059 conditions, 5589 events. 3109/5589 cut-off events. For 165541/165541 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 36348 event pairs, 410 based on Foata normal form. 68/5657 useless extension candidates. Maximal degree in co-relation 45946. Up to 4082 conditions per place. [2023-08-30 12:07:45,682 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 619 selfloop transitions, 260 changer transitions 14/893 dead transitions. [2023-08-30 12:07:45,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 893 transitions, 18148 flow [2023-08-30 12:07:45,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-08-30 12:07:45,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-08-30 12:07:45,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 5008 transitions. [2023-08-30 12:07:45,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2769298827692988 [2023-08-30 12:07:45,690 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 5008 transitions. [2023-08-30 12:07:45,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 5008 transitions. [2023-08-30 12:07:45,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:07:45,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 5008 transitions. [2023-08-30 12:07:45,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 75.87878787878788) internal successors, (5008), 66 states have internal predecessors, (5008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:07:45,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 274.0) internal successors, (18358), 67 states have internal predecessors, (18358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:07:45,713 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 274.0) internal successors, (18358), 67 states have internal predecessors, (18358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:07:45,713 INFO L175 Difference]: Start difference. First operand has 371 places, 945 transitions, 18812 flow. Second operand 66 states and 5008 transitions. [2023-08-30 12:07:45,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 893 transitions, 18148 flow [2023-08-30 12:07:47,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 893 transitions, 16605 flow, removed 703 selfloop flow, removed 40 redundant places. [2023-08-30 12:07:47,125 INFO L231 Difference]: Finished difference. Result has 389 places, 766 transitions, 15289 flow [2023-08-30 12:07:47,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=11972, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=15289, PETRI_PLACES=389, PETRI_TRANSITIONS=766} [2023-08-30 12:07:47,126 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 361 predicate places. [2023-08-30 12:07:47,126 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 766 transitions, 15289 flow [2023-08-30 12:07:47,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 73.1842105263158) internal successors, (2781), 38 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) [2023-08-30 12:07:47,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:07:47,127 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:07:47,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 12:07:47,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:07:47,327 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:07:47,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:07:47,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1321980113, now seen corresponding path program 7 times [2023-08-30 12:07:47,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:07:47,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897254089] [2023-08-30 12:07:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:07:47,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:07:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:07:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:07:48,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:07:48,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897254089] [2023-08-30 12:07:48,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897254089] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:07:48,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576058385] [2023-08-30 12:07:48,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 12:07:48,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:07:48,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:07:48,765 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:07:48,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 12:07:48,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:07:48,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 12:07:48,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:07:49,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 12:07:49,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:07:49,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 12:07:49,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:07:49,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 12:07:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:07:49,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:07:51,043 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:07:51,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 122 [2023-08-30 12:07:51,128 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:07:51,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 387 treesize of output 467 [2023-08-30 12:07:51,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:07:51,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 328 [2023-08-30 12:07:51,254 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:07:51,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 215 treesize of output 259 [2023-08-30 12:08:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:08:26,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576058385] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:08:26,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:08:26,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 35 [2023-08-30 12:08:26,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793837815] [2023-08-30 12:08:26,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:08:26,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-30 12:08:26,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:08:26,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-30 12:08:26,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1074, Unknown=2, NotChecked=0, Total=1332 [2023-08-30 12:08:29,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 274 [2023-08-30 12:08:29,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 766 transitions, 15289 flow. Second operand has 37 states, 37 states have (on average 73.1891891891892) internal successors, (2708), 37 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:29,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:08:29,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 274 [2023-08-30 12:08:29,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:08:32,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:08:39,893 INFO L130 PetriNetUnfolder]: 3809/6793 cut-off events. [2023-08-30 12:08:39,893 INFO L131 PetriNetUnfolder]: For 221556/221556 co-relation queries the response was YES. [2023-08-30 12:08:39,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56223 conditions, 6793 events. 3809/6793 cut-off events. For 221556/221556 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 46156 event pairs, 416 based on Foata normal form. 92/6885 useless extension candidates. Maximal degree in co-relation 56107. Up to 3470 conditions per place. [2023-08-30 12:08:39,988 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 707 selfloop transitions, 347 changer transitions 16/1070 dead transitions. [2023-08-30 12:08:39,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 1070 transitions, 22586 flow [2023-08-30 12:08:39,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-08-30 12:08:39,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-08-30 12:08:39,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 4405 transitions. [2023-08-30 12:08:39,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.277183488547697 [2023-08-30 12:08:39,994 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 4405 transitions. [2023-08-30 12:08:39,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 4405 transitions. [2023-08-30 12:08:39,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:08:39,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 4405 transitions. [2023-08-30 12:08:40,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 75.94827586206897) internal successors, (4405), 58 states have internal predecessors, (4405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:40,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 274.0) internal successors, (16166), 59 states have internal predecessors, (16166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:40,013 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 274.0) internal successors, (16166), 59 states have internal predecessors, (16166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:40,014 INFO L175 Difference]: Start difference. First operand has 389 places, 766 transitions, 15289 flow. Second operand 58 states and 4405 transitions. [2023-08-30 12:08:40,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 1070 transitions, 22586 flow [2023-08-30 12:08:41,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 1070 transitions, 21777 flow, removed 351 selfloop flow, removed 36 redundant places. [2023-08-30 12:08:41,672 INFO L231 Difference]: Finished difference. Result has 422 places, 886 transitions, 18947 flow [2023-08-30 12:08:41,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=13719, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=18947, PETRI_PLACES=422, PETRI_TRANSITIONS=886} [2023-08-30 12:08:41,673 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 394 predicate places. [2023-08-30 12:08:41,673 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 886 transitions, 18947 flow [2023-08-30 12:08:41,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 73.1891891891892) internal successors, (2708), 37 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:41,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:08:41,674 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:08:41,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 12:08:41,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:08:41,880 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:08:41,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:08:41,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1322843152, now seen corresponding path program 9 times [2023-08-30 12:08:41,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:08:41,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306988494] [2023-08-30 12:08:41,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:08:41,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:08:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:08:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:08:43,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:08:43,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306988494] [2023-08-30 12:08:43,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306988494] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:08:43,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228580422] [2023-08-30 12:08:43,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 12:08:43,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:08:43,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:08:43,483 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:08:43,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 12:08:43,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 12:08:43,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:08:43,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 12:08:43,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:08:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 12:08:43,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:08:44,316 INFO L321 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2023-08-30 12:08:44,316 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 231 treesize of output 186 [2023-08-30 12:08:44,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 12:08:44,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228580422] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:08:44,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:08:44,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 26 [2023-08-30 12:08:44,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842785867] [2023-08-30 12:08:44,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:08:44,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 12:08:44,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:08:44,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 12:08:44,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2023-08-30 12:08:46,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 274 [2023-08-30 12:08:46,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 886 transitions, 18947 flow. Second operand has 28 states, 28 states have (on average 89.46428571428571) internal successors, (2505), 28 states have internal predecessors, (2505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:46,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:08:46,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 274 [2023-08-30 12:08:46,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:08:50,670 INFO L130 PetriNetUnfolder]: 3823/6823 cut-off events. [2023-08-30 12:08:50,670 INFO L131 PetriNetUnfolder]: For 242937/242937 co-relation queries the response was YES. [2023-08-30 12:08:50,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58991 conditions, 6823 events. 3823/6823 cut-off events. For 242937/242937 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 46166 event pairs, 464 based on Foata normal form. 28/6851 useless extension candidates. Maximal degree in co-relation 58865. Up to 4861 conditions per place. [2023-08-30 12:08:50,755 INFO L137 encePairwiseOnDemand]: 266/274 looper letters, 792 selfloop transitions, 137 changer transitions 8/937 dead transitions. [2023-08-30 12:08:50,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 937 transitions, 21214 flow [2023-08-30 12:08:50,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 12:08:50,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 12:08:50,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2291 transitions. [2023-08-30 12:08:50,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33445255474452557 [2023-08-30 12:08:50,759 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2291 transitions. [2023-08-30 12:08:50,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2291 transitions. [2023-08-30 12:08:50,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:08:50,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2291 transitions. [2023-08-30 12:08:50,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 91.64) internal successors, (2291), 25 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:50,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 274.0) internal successors, (7124), 26 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:50,768 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 274.0) internal successors, (7124), 26 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:50,768 INFO L175 Difference]: Start difference. First operand has 422 places, 886 transitions, 18947 flow. Second operand 25 states and 2291 transitions. [2023-08-30 12:08:50,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 937 transitions, 21214 flow [2023-08-30 12:08:52,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 937 transitions, 20197 flow, removed 394 selfloop flow, removed 34 redundant places. [2023-08-30 12:08:52,740 INFO L231 Difference]: Finished difference. Result has 411 places, 889 transitions, 18316 flow [2023-08-30 12:08:52,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=17807, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=882, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=749, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=18316, PETRI_PLACES=411, PETRI_TRANSITIONS=889} [2023-08-30 12:08:52,742 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 383 predicate places. [2023-08-30 12:08:52,742 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 889 transitions, 18316 flow [2023-08-30 12:08:52,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 89.46428571428571) internal successors, (2505), 28 states have internal predecessors, (2505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:52,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:08:52,743 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:08:52,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 12:08:52,949 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,SelfDestructingSolverStorable24 [2023-08-30 12:08:52,949 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:08:52,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:08:52,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1322007083, now seen corresponding path program 8 times [2023-08-30 12:08:52,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:08:52,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316907092] [2023-08-30 12:08:52,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:08:52,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:08:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:08:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:08:54,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:08:54,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316907092] [2023-08-30 12:08:54,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316907092] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:08:54,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529062288] [2023-08-30 12:08:54,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 12:08:54,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:08:54,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:08:54,226 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:08:54,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 12:08:54,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 12:08:54,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:08:54,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-30 12:08:54,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:08:54,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 12:08:54,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:08:54,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 12:08:54,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:08:54,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 12:08:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:08:55,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:08:57,093 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:08:57,094 INFO L350 Elim1Store]: Elim1 eliminated variable 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 209 treesize of output 137 [2023-08-30 12:08:57,215 INFO L321 Elim1Store]: treesize reduction 59, result has 63.4 percent of original size [2023-08-30 12:08:57,215 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 932 treesize of output 909 [2023-08-30 12:08:57,253 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:08:57,255 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:08:57,256 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:08:57,256 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:08:57,259 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:08:57,260 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:08:57,260 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:08:57,284 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:08:57,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 281 treesize of output 281 [2023-08-30 12:08:57,362 INFO L321 Elim1Store]: treesize reduction 64, result has 41.3 percent of original size [2023-08-30 12:08:57,363 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 283 treesize of output 239 [2023-08-30 12:09:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:09:09,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529062288] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:09:09,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:09:09,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-30 12:09:09,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953987023] [2023-08-30 12:09:09,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:09:09,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-30 12:09:09,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:09:09,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-30 12:09:09,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=1106, Unknown=4, NotChecked=0, Total=1406 [2023-08-30 12:09:11,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:09:14,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:09:14,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 274 [2023-08-30 12:09:14,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 889 transitions, 18316 flow. Second operand has 38 states, 38 states have (on average 73.1842105263158) internal successors, (2781), 38 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) [2023-08-30 12:09:14,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:09:14,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 274 [2023-08-30 12:09:14,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:09:23,585 INFO L130 PetriNetUnfolder]: 2753/4961 cut-off events. [2023-08-30 12:09:23,585 INFO L131 PetriNetUnfolder]: For 160520/160520 co-relation queries the response was YES. [2023-08-30 12:09:23,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40783 conditions, 4961 events. 2753/4961 cut-off events. For 160520/160520 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 31244 event pairs, 422 based on Foata normal form. 18/4979 useless extension candidates. Maximal degree in co-relation 40655. Up to 4042 conditions per place. [2023-08-30 12:09:23,654 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 554 selfloop transitions, 165 changer transitions 19/738 dead transitions. [2023-08-30 12:09:23,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 738 transitions, 15020 flow [2023-08-30 12:09:23,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-30 12:09:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-30 12:09:23,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3098 transitions. [2023-08-30 12:09:23,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27576998397721203 [2023-08-30 12:09:23,658 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3098 transitions. [2023-08-30 12:09:23,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3098 transitions. [2023-08-30 12:09:23,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:09:23,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3098 transitions. [2023-08-30 12:09:23,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 75.5609756097561) internal successors, (3098), 41 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:23,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 274.0) internal successors, (11508), 42 states have internal predecessors, (11508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:23,672 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 274.0) internal successors, (11508), 42 states have internal predecessors, (11508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:23,672 INFO L175 Difference]: Start difference. First operand has 411 places, 889 transitions, 18316 flow. Second operand 41 states and 3098 transitions. [2023-08-30 12:09:23,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 738 transitions, 15020 flow [2023-08-30 12:09:24,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 738 transitions, 14357 flow, removed 164 selfloop flow, removed 43 redundant places. [2023-08-30 12:09:24,948 INFO L231 Difference]: Finished difference. Result has 384 places, 670 transitions, 13227 flow [2023-08-30 12:09:24,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=12647, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=13227, PETRI_PLACES=384, PETRI_TRANSITIONS=670} [2023-08-30 12:09:24,950 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 356 predicate places. [2023-08-30 12:09:24,950 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 670 transitions, 13227 flow [2023-08-30 12:09:24,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 73.1842105263158) internal successors, (2781), 38 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) [2023-08-30 12:09:24,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:09:24,951 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:09:24,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 12:09:25,158 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,SelfDestructingSolverStorable25 [2023-08-30 12:09:25,158 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:09:25,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:09:25,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1322007082, now seen corresponding path program 10 times [2023-08-30 12:09:25,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:09:25,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145080378] [2023-08-30 12:09:25,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:09:25,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:09:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:09:26,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:09:26,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:09:26,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145080378] [2023-08-30 12:09:26,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145080378] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:09:26,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331023098] [2023-08-30 12:09:26,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 12:09:26,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:09:26,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:09:26,601 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:09:26,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 12:09:26,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 12:09:26,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:09:26,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 12:09:26,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:09:26,863 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 15 treesize of output 11 [2023-08-30 12:09:26,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 12:09:26,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 12:09:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:09:27,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:09:28,511 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:09:28,511 INFO L350 Elim1Store]: Elim1 eliminated variable 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 215 treesize of output 143 [2023-08-30 12:09:28,579 INFO L321 Elim1Store]: treesize reduction 26, result has 69.4 percent of original size [2023-08-30 12:09:28,579 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 969 treesize of output 905 [2023-08-30 12:09:28,610 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:09:28,614 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:09:28,617 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:09:28,618 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:09:28,644 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:09:28,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 290 treesize of output 293 [2023-08-30 12:09:28,734 INFO L321 Elim1Store]: treesize reduction 34, result has 60.0 percent of original size [2023-08-30 12:09:28,735 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 295 treesize of output 251 [2023-08-30 12:09:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:09:31,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331023098] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:09:31,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:09:31,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 35 [2023-08-30 12:09:31,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094484172] [2023-08-30 12:09:31,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:09:31,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-30 12:09:31,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:09:31,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-30 12:09:31,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1084, Unknown=2, NotChecked=0, Total=1332 [2023-08-30 12:09:31,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 274 [2023-08-30 12:09:31,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 670 transitions, 13227 flow. Second operand has 37 states, 37 states have (on average 73.1891891891892) internal successors, (2708), 37 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:31,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:09:31,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 274 [2023-08-30 12:09:31,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:09:37,146 INFO L130 PetriNetUnfolder]: 2729/4921 cut-off events. [2023-08-30 12:09:37,146 INFO L131 PetriNetUnfolder]: For 155030/155030 co-relation queries the response was YES. [2023-08-30 12:09:37,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39589 conditions, 4921 events. 2729/4921 cut-off events. For 155030/155030 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 31084 event pairs, 326 based on Foata normal form. 16/4937 useless extension candidates. Maximal degree in co-relation 39475. Up to 3276 conditions per place. [2023-08-30 12:09:37,216 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 564 selfloop transitions, 143 changer transitions 29/736 dead transitions. [2023-08-30 12:09:37,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 736 transitions, 14901 flow [2023-08-30 12:09:37,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-30 12:09:37,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-30 12:09:37,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3165 transitions. [2023-08-30 12:09:37,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2750260688216893 [2023-08-30 12:09:37,220 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3165 transitions. [2023-08-30 12:09:37,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3165 transitions. [2023-08-30 12:09:37,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:09:37,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3165 transitions. [2023-08-30 12:09:37,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 75.35714285714286) internal successors, (3165), 42 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:37,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 274.0) internal successors, (11782), 43 states have internal predecessors, (11782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:37,229 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 274.0) internal successors, (11782), 43 states have internal predecessors, (11782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:37,229 INFO L175 Difference]: Start difference. First operand has 384 places, 670 transitions, 13227 flow. Second operand 42 states and 3165 transitions. [2023-08-30 12:09:37,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 736 transitions, 14901 flow [2023-08-30 12:09:38,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 736 transitions, 14633 flow, removed 15 selfloop flow, removed 36 redundant places. [2023-08-30 12:09:38,347 INFO L231 Difference]: Finished difference. Result has 384 places, 661 transitions, 12998 flow [2023-08-30 12:09:38,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=12842, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=12998, PETRI_PLACES=384, PETRI_TRANSITIONS=661} [2023-08-30 12:09:38,348 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 356 predicate places. [2023-08-30 12:09:38,348 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 661 transitions, 12998 flow [2023-08-30 12:09:38,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 73.1891891891892) internal successors, (2708), 37 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:38,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:09:38,349 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:09:38,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-08-30 12:09:38,549 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,SelfDestructingSolverStorable26 [2023-08-30 12:09:38,549 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:09:38,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:09:38,549 INFO L85 PathProgramCache]: Analyzing trace with hash -919045776, now seen corresponding path program 9 times [2023-08-30 12:09:38,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:09:38,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828141318] [2023-08-30 12:09:38,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:09:38,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:09:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:09:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:09:40,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:09:40,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828141318] [2023-08-30 12:09:40,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828141318] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:09:40,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407080221] [2023-08-30 12:09:40,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 12:09:40,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:09:40,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:09:40,770 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:09:40,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 12:09:40,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 12:09:40,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:09:40,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 12:09:40,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:09:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 12:09:41,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:09:41,838 INFO L321 Elim1Store]: treesize reduction 48, result has 37.7 percent of original size [2023-08-30 12:09:41,839 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 240 treesize of output 184 [2023-08-30 12:09:42,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 12:09:42,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407080221] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:09:42,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:09:42,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 6] total 26 [2023-08-30 12:09:42,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779540211] [2023-08-30 12:09:42,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:09:42,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 12:09:42,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:09:42,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 12:09:42,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2023-08-30 12:09:44,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 274 [2023-08-30 12:09:44,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 661 transitions, 12998 flow. Second operand has 28 states, 28 states have (on average 93.5) internal successors, (2618), 28 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:44,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:09:44,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 274 [2023-08-30 12:09:44,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:09:48,671 INFO L130 PetriNetUnfolder]: 2843/5087 cut-off events. [2023-08-30 12:09:48,671 INFO L131 PetriNetUnfolder]: For 171922/171922 co-relation queries the response was YES. [2023-08-30 12:09:48,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41573 conditions, 5087 events. 2843/5087 cut-off events. For 171922/171922 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 32029 event pairs, 234 based on Foata normal form. 124/5211 useless extension candidates. Maximal degree in co-relation 41459. Up to 2869 conditions per place. [2023-08-30 12:09:48,757 INFO L137 encePairwiseOnDemand]: 266/274 looper letters, 499 selfloop transitions, 272 changer transitions 11/782 dead transitions. [2023-08-30 12:09:48,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 782 transitions, 16236 flow [2023-08-30 12:09:48,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 12:09:48,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 12:09:48,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3552 transitions. [2023-08-30 12:09:48,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35036496350364965 [2023-08-30 12:09:48,762 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3552 transitions. [2023-08-30 12:09:48,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3552 transitions. [2023-08-30 12:09:48,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:09:48,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3552 transitions. [2023-08-30 12:09:48,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 96.0) internal successors, (3552), 37 states have internal predecessors, (3552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:48,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 274.0) internal successors, (10412), 38 states have internal predecessors, (10412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:48,776 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 274.0) internal successors, (10412), 38 states have internal predecessors, (10412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:48,776 INFO L175 Difference]: Start difference. First operand has 384 places, 661 transitions, 12998 flow. Second operand 37 states and 3552 transitions. [2023-08-30 12:09:48,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 782 transitions, 16236 flow [2023-08-30 12:09:50,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 782 transitions, 15990 flow, removed 26 selfloop flow, removed 37 redundant places. [2023-08-30 12:09:50,163 INFO L231 Difference]: Finished difference. Result has 378 places, 700 transitions, 14648 flow [2023-08-30 12:09:50,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=12345, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=14648, PETRI_PLACES=378, PETRI_TRANSITIONS=700} [2023-08-30 12:09:50,165 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 350 predicate places. [2023-08-30 12:09:50,165 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 700 transitions, 14648 flow [2023-08-30 12:09:50,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 93.5) internal successors, (2618), 28 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:50,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:09:50,166 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:09:50,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 12:09:50,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:09:50,370 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:09:50,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:09:50,371 INFO L85 PathProgramCache]: Analyzing trace with hash -893154577, now seen corresponding path program 11 times [2023-08-30 12:09:50,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:09:50,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300222058] [2023-08-30 12:09:50,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:09:50,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:09:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:09:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:09:51,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:09:51,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300222058] [2023-08-30 12:09:51,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300222058] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:09:51,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992068796] [2023-08-30 12:09:51,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 12:09:51,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:09:51,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:09:51,114 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:09:51,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 12:09:51,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 12:09:51,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:09:51,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 12:09:51,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:09:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:09:51,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:09:52,185 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-30 12:09:52,185 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 251 treesize of output 243 [2023-08-30 12:09:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 12:09:54,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992068796] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:09:54,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:09:54,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 29 [2023-08-30 12:09:54,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840256016] [2023-08-30 12:09:54,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:09:54,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 12:09:54,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:09:54,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 12:09:54,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2023-08-30 12:09:56,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 274 [2023-08-30 12:09:56,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 700 transitions, 14648 flow. Second operand has 31 states, 31 states have (on average 94.45161290322581) internal successors, (2928), 31 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:56,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:09:56,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 274 [2023-08-30 12:09:56,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:09:59,450 INFO L130 PetriNetUnfolder]: 3569/6289 cut-off events. [2023-08-30 12:09:59,450 INFO L131 PetriNetUnfolder]: For 309203/309203 co-relation queries the response was YES. [2023-08-30 12:09:59,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55570 conditions, 6289 events. 3569/6289 cut-off events. For 309203/309203 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 41422 event pairs, 296 based on Foata normal form. 104/6393 useless extension candidates. Maximal degree in co-relation 55450. Up to 3173 conditions per place. [2023-08-30 12:09:59,521 INFO L137 encePairwiseOnDemand]: 266/274 looper letters, 592 selfloop transitions, 328 changer transitions 12/932 dead transitions. [2023-08-30 12:09:59,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 932 transitions, 21050 flow [2023-08-30 12:09:59,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 12:09:59,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 12:09:59,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3303 transitions. [2023-08-30 12:09:59,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35455130957492487 [2023-08-30 12:09:59,525 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3303 transitions. [2023-08-30 12:09:59,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3303 transitions. [2023-08-30 12:09:59,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:09:59,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3303 transitions. [2023-08-30 12:09:59,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 97.1470588235294) internal successors, (3303), 34 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:59,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 274.0) internal successors, (9590), 35 states have internal predecessors, (9590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:59,534 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 274.0) internal successors, (9590), 35 states have internal predecessors, (9590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:59,534 INFO L175 Difference]: Start difference. First operand has 378 places, 700 transitions, 14648 flow. Second operand 34 states and 3303 transitions. [2023-08-30 12:09:59,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 932 transitions, 21050 flow [2023-08-30 12:10:00,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 932 transitions, 20369 flow, removed 237 selfloop flow, removed 22 redundant places. [2023-08-30 12:10:00,934 INFO L231 Difference]: Finished difference. Result has 401 places, 831 transitions, 18376 flow [2023-08-30 12:10:00,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=14082, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=18376, PETRI_PLACES=401, PETRI_TRANSITIONS=831} [2023-08-30 12:10:00,935 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 373 predicate places. [2023-08-30 12:10:00,936 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 831 transitions, 18376 flow [2023-08-30 12:10:00,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 94.45161290322581) internal successors, (2928), 31 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:00,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:10:00,936 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:10:00,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 12:10:01,142 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,SelfDestructingSolverStorable28 [2023-08-30 12:10:01,142 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:10:01,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:10:01,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1941534560, now seen corresponding path program 12 times [2023-08-30 12:10:01,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:10:01,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204955758] [2023-08-30 12:10:01,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:10:01,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:10:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:10:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:10:01,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:10:01,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204955758] [2023-08-30 12:10:01,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204955758] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:10:01,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250943590] [2023-08-30 12:10:01,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 12:10:01,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:10:01,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:10:01,341 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:10:01,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 12:10:01,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 12:10:01,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:10:01,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 12:10:01,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:10:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:10:01,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:10:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:10:01,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250943590] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:10:01,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:10:01,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 12:10:01,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765558854] [2023-08-30 12:10:01,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:10:01,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 12:10:01,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:10:01,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 12:10:01,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-08-30 12:10:02,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 274 [2023-08-30 12:10:02,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 831 transitions, 18376 flow. Second operand has 29 states, 29 states have (on average 103.44827586206897) internal successors, (3000), 29 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:02,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:10:02,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 274 [2023-08-30 12:10:02,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:10:03,800 INFO L130 PetriNetUnfolder]: 1902/3327 cut-off events. [2023-08-30 12:10:03,800 INFO L131 PetriNetUnfolder]: For 153938/153938 co-relation queries the response was YES. [2023-08-30 12:10:03,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32524 conditions, 3327 events. 1902/3327 cut-off events. For 153938/153938 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19770 event pairs, 911 based on Foata normal form. 36/3355 useless extension candidates. Maximal degree in co-relation 32396. Up to 3115 conditions per place. [2023-08-30 12:10:03,852 INFO L137 encePairwiseOnDemand]: 268/274 looper letters, 401 selfloop transitions, 5 changer transitions 66/477 dead transitions. [2023-08-30 12:10:03,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 477 transitions, 11000 flow [2023-08-30 12:10:03,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 12:10:03,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 12:10:03,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2113 transitions. [2023-08-30 12:10:03,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3855839416058394 [2023-08-30 12:10:03,854 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2113 transitions. [2023-08-30 12:10:03,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2113 transitions. [2023-08-30 12:10:03,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:10:03,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2113 transitions. [2023-08-30 12:10:03,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 105.65) internal successors, (2113), 20 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:03,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 274.0) internal successors, (5754), 21 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:03,861 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 274.0) internal successors, (5754), 21 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:03,861 INFO L175 Difference]: Start difference. First operand has 401 places, 831 transitions, 18376 flow. Second operand 20 states and 2113 transitions. [2023-08-30 12:10:03,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 477 transitions, 11000 flow [2023-08-30 12:10:04,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 477 transitions, 9285 flow, removed 459 selfloop flow, removed 90 redundant places. [2023-08-30 12:10:04,740 INFO L231 Difference]: Finished difference. Result has 285 places, 411 transitions, 7814 flow [2023-08-30 12:10:04,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=8273, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7814, PETRI_PLACES=285, PETRI_TRANSITIONS=411} [2023-08-30 12:10:04,741 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 257 predicate places. [2023-08-30 12:10:04,741 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 411 transitions, 7814 flow [2023-08-30 12:10:04,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 103.44827586206897) internal successors, (3000), 29 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:04,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:10:04,742 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:10:04,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 12:10:04,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:10:04,949 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:10:04,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:10:04,950 INFO L85 PathProgramCache]: Analyzing trace with hash 698714829, now seen corresponding path program 10 times [2023-08-30 12:10:04,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:10:04,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580298443] [2023-08-30 12:10:04,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:10:04,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:10:04,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:10:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:10:06,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:10:06,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580298443] [2023-08-30 12:10:06,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580298443] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:10:06,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881817864] [2023-08-30 12:10:06,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 12:10:06,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:10:06,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:10:06,626 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:10:06,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 12:10:06,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 12:10:06,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:10:06,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 12:10:06,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:10:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:10:07,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:10:08,814 INFO L321 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2023-08-30 12:10:08,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 320 treesize of output 344 [2023-08-30 12:10:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:10:15,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881817864] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:10:15,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:10:15,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 43 [2023-08-30 12:10:15,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632880730] [2023-08-30 12:10:15,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:10:15,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 12:10:15,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:10:15,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 12:10:15,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1661, Unknown=0, NotChecked=0, Total=1980 [2023-08-30 12:10:18,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 274 [2023-08-30 12:10:18,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 411 transitions, 7814 flow. Second operand has 45 states, 45 states have (on average 92.2) internal successors, (4149), 45 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:18,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:10:18,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 274 [2023-08-30 12:10:18,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:10:27,401 INFO L130 PetriNetUnfolder]: 3055/5249 cut-off events. [2023-08-30 12:10:27,401 INFO L131 PetriNetUnfolder]: For 197563/197563 co-relation queries the response was YES. [2023-08-30 12:10:27,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45490 conditions, 5249 events. 3055/5249 cut-off events. For 197563/197563 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 33953 event pairs, 184 based on Foata normal form. 228/5476 useless extension candidates. Maximal degree in co-relation 45401. Up to 2309 conditions per place. [2023-08-30 12:10:27,475 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 514 selfloop transitions, 341 changer transitions 10/865 dead transitions. [2023-08-30 12:10:27,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 865 transitions, 17663 flow [2023-08-30 12:10:27,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-08-30 12:10:27,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-08-30 12:10:27,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 6486 transitions. [2023-08-30 12:10:27,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3481107771575784 [2023-08-30 12:10:27,480 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 6486 transitions. [2023-08-30 12:10:27,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 6486 transitions. [2023-08-30 12:10:27,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:10:27,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 6486 transitions. [2023-08-30 12:10:27,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 95.38235294117646) internal successors, (6486), 68 states have internal predecessors, (6486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:27,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 274.0) internal successors, (18906), 69 states have internal predecessors, (18906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:27,497 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 274.0) internal successors, (18906), 69 states have internal predecessors, (18906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:27,497 INFO L175 Difference]: Start difference. First operand has 285 places, 411 transitions, 7814 flow. Second operand 68 states and 6486 transitions. [2023-08-30 12:10:27,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 865 transitions, 17663 flow [2023-08-30 12:10:28,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 865 transitions, 16793 flow, removed 338 selfloop flow, removed 14 redundant places. [2023-08-30 12:10:28,494 INFO L231 Difference]: Finished difference. Result has 330 places, 649 transitions, 14185 flow [2023-08-30 12:10:28,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=7512, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=14185, PETRI_PLACES=330, PETRI_TRANSITIONS=649} [2023-08-30 12:10:28,495 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 302 predicate places. [2023-08-30 12:10:28,495 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 649 transitions, 14185 flow [2023-08-30 12:10:28,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 92.2) internal successors, (4149), 45 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:28,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:10:28,495 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:10:28,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 12:10:28,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-30 12:10:28,699 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:10:28,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:10:28,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1891233182, now seen corresponding path program 11 times [2023-08-30 12:10:28,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:10:28,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893413083] [2023-08-30 12:10:28,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:10:28,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:10:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:10:28,871 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 12:10:28,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:10:28,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893413083] [2023-08-30 12:10:28,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893413083] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:10:28,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953206713] [2023-08-30 12:10:28,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 12:10:28,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:10:28,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:10:28,877 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:10:28,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 12:10:29,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 12:10:29,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:10:29,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 12:10:29,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:10:29,299 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:10:29,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 140 [2023-08-30 12:10:29,381 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 12:10:29,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:10:29,783 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-08-30 12:10:29,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 237 treesize of output 171 [2023-08-30 12:10:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 12:10:29,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953206713] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:10:29,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:10:29,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 18 [2023-08-30 12:10:29,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173788529] [2023-08-30 12:10:29,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:10:29,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 12:10:29,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:10:29,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 12:10:29,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2023-08-30 12:10:30,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 274 [2023-08-30 12:10:30,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 649 transitions, 14185 flow. Second operand has 20 states, 20 states have (on average 103.8) internal successors, (2076), 20 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:30,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:10:30,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 274 [2023-08-30 12:10:30,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:10:32,661 INFO L130 PetriNetUnfolder]: 4405/7543 cut-off events. [2023-08-30 12:10:32,661 INFO L131 PetriNetUnfolder]: For 346701/346701 co-relation queries the response was YES. [2023-08-30 12:10:32,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76740 conditions, 7543 events. 4405/7543 cut-off events. For 346701/346701 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 51825 event pairs, 342 based on Foata normal form. 48/7590 useless extension candidates. Maximal degree in co-relation 76616. Up to 3009 conditions per place. [2023-08-30 12:10:32,789 INFO L137 encePairwiseOnDemand]: 268/274 looper letters, 472 selfloop transitions, 495 changer transitions 5/972 dead transitions. [2023-08-30 12:10:32,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 972 transitions, 24724 flow [2023-08-30 12:10:32,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 12:10:32,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 12:10:32,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1294 transitions. [2023-08-30 12:10:32,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935523114355231 [2023-08-30 12:10:32,792 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1294 transitions. [2023-08-30 12:10:32,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1294 transitions. [2023-08-30 12:10:32,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:10:32,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1294 transitions. [2023-08-30 12:10:32,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 107.83333333333333) internal successors, (1294), 12 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:32,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 274.0) internal successors, (3562), 13 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:32,795 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 274.0) internal successors, (3562), 13 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:32,795 INFO L175 Difference]: Start difference. First operand has 330 places, 649 transitions, 14185 flow. Second operand 12 states and 1294 transitions. [2023-08-30 12:10:32,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 972 transitions, 24724 flow [2023-08-30 12:10:35,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 972 transitions, 23345 flow, removed 669 selfloop flow, removed 12 redundant places. [2023-08-30 12:10:35,869 INFO L231 Difference]: Finished difference. Result has 335 places, 849 transitions, 19458 flow [2023-08-30 12:10:35,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=13114, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=19458, PETRI_PLACES=335, PETRI_TRANSITIONS=849} [2023-08-30 12:10:35,870 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 307 predicate places. [2023-08-30 12:10:35,870 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 849 transitions, 19458 flow [2023-08-30 12:10:35,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 103.8) internal successors, (2076), 20 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:35,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:10:35,871 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:10:35,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 12:10:36,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:10:36,071 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:10:36,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:10:36,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1574380542, now seen corresponding path program 13 times [2023-08-30 12:10:36,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:10:36,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895125909] [2023-08-30 12:10:36,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:10:36,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:10:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:10:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:10:36,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:10:36,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895125909] [2023-08-30 12:10:36,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895125909] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:10:36,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362345395] [2023-08-30 12:10:36,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 12:10:36,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:10:36,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:10:36,635 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:10:36,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 12:10:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:10:36,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 12:10:36,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:10:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:10:37,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:10:38,018 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-30 12:10:38,018 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 271 treesize of output 263 [2023-08-30 12:10:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:10:39,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362345395] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:10:39,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:10:39,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-30 12:10:39,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957961180] [2023-08-30 12:10:39,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:10:39,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 12:10:39,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:10:39,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 12:10:39,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1353, Unknown=0, NotChecked=0, Total=1640 [2023-08-30 12:10:41,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 274 [2023-08-30 12:10:41,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 849 transitions, 19458 flow. Second operand has 41 states, 41 states have (on average 93.2439024390244) internal successors, (3823), 41 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:41,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:10:41,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 274 [2023-08-30 12:10:41,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:10:53,227 INFO L130 PetriNetUnfolder]: 8917/15267 cut-off events. [2023-08-30 12:10:53,227 INFO L131 PetriNetUnfolder]: For 908637/908637 co-relation queries the response was YES. [2023-08-30 12:10:53,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169462 conditions, 15267 events. 8917/15267 cut-off events. For 908637/908637 co-relation queries the response was YES. Maximal size of possible extension queue 1002. Compared 118487 event pairs, 522 based on Foata normal form. 360/15626 useless extension candidates. Maximal degree in co-relation 169332. Up to 5471 conditions per place. [2023-08-30 12:10:53,671 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 891 selfloop transitions, 1081 changer transitions 5/1977 dead transitions. [2023-08-30 12:10:53,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 1977 transitions, 53295 flow [2023-08-30 12:10:53,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-08-30 12:10:53,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-08-30 12:10:53,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 6972 transitions. [2023-08-30 12:10:53,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35340632603406325 [2023-08-30 12:10:53,676 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 6972 transitions. [2023-08-30 12:10:53,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 6972 transitions. [2023-08-30 12:10:53,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:10:53,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 6972 transitions. [2023-08-30 12:10:53,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 96.83333333333333) internal successors, (6972), 72 states have internal predecessors, (6972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:53,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 274.0) internal successors, (20002), 73 states have internal predecessors, (20002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:53,693 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 274.0) internal successors, (20002), 73 states have internal predecessors, (20002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:53,694 INFO L175 Difference]: Start difference. First operand has 335 places, 849 transitions, 19458 flow. Second operand 72 states and 6972 transitions. [2023-08-30 12:10:53,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 1977 transitions, 53295 flow [2023-08-30 12:11:00,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 1977 transitions, 49831 flow, removed 1727 selfloop flow, removed 1 redundant places. [2023-08-30 12:11:00,928 INFO L231 Difference]: Finished difference. Result has 456 places, 1773 transitions, 47758 flow [2023-08-30 12:11:00,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=18301, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=47758, PETRI_PLACES=456, PETRI_TRANSITIONS=1773} [2023-08-30 12:11:00,929 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 428 predicate places. [2023-08-30 12:11:00,930 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 1773 transitions, 47758 flow [2023-08-30 12:11:00,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 93.2439024390244) internal successors, (3823), 41 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:11:00,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:11:00,930 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:11:00,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 12:11:01,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:11:01,131 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:11:01,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:11:01,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1638827020, now seen corresponding path program 12 times [2023-08-30 12:11:01,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:11:01,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872217460] [2023-08-30 12:11:01,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:11:01,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:11:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:11:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:11:05,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:11:05,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872217460] [2023-08-30 12:11:05,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872217460] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:11:05,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492663396] [2023-08-30 12:11:05,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 12:11:05,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:11:05,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:11:05,425 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:11:05,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 12:11:05,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 12:11:05,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:11:05,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 12:11:05,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:11:06,499 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:11:06,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:11:07,791 INFO L321 Elim1Store]: treesize reduction 101, result has 44.2 percent of original size [2023-08-30 12:11:07,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 323 treesize of output 256 [2023-08-30 12:11:09,875 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 12:11:09,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492663396] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:11:09,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:11:09,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 9] total 38 [2023-08-30 12:11:09,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603074127] [2023-08-30 12:11:09,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:11:09,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-30 12:11:09,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:11:09,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-30 12:11:09,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2023-08-30 12:11:13,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 274 [2023-08-30 12:11:13,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 1773 transitions, 47758 flow. Second operand has 40 states, 40 states have (on average 88.325) internal successors, (3533), 40 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:11:13,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:11:13,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 274 [2023-08-30 12:11:13,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:11:35,799 INFO L130 PetriNetUnfolder]: 12705/22031 cut-off events. [2023-08-30 12:11:35,799 INFO L131 PetriNetUnfolder]: For 2247207/2247207 co-relation queries the response was YES. [2023-08-30 12:11:36,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279307 conditions, 22031 events. 12705/22031 cut-off events. For 2247207/2247207 co-relation queries the response was YES. Maximal size of possible extension queue 1293. Compared 179724 event pairs, 666 based on Foata normal form. 1620/23650 useless extension candidates. Maximal degree in co-relation 279126. Up to 8527 conditions per place. [2023-08-30 12:11:36,537 INFO L137 encePairwiseOnDemand]: 266/274 looper letters, 1351 selfloop transitions, 1530 changer transitions 8/2889 dead transitions. [2023-08-30 12:11:36,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 2889 transitions, 90998 flow [2023-08-30 12:11:36,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-08-30 12:11:36,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-08-30 12:11:36,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 5226 transitions. [2023-08-30 12:11:36,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3346139070303496 [2023-08-30 12:11:36,541 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 5226 transitions. [2023-08-30 12:11:36,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 5226 transitions. [2023-08-30 12:11:36,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:11:36,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 5226 transitions. [2023-08-30 12:11:36,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 91.6842105263158) internal successors, (5226), 57 states have internal predecessors, (5226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:11:36,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 274.0) internal successors, (15892), 58 states have internal predecessors, (15892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:11:36,552 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 274.0) internal successors, (15892), 58 states have internal predecessors, (15892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:11:36,552 INFO L175 Difference]: Start difference. First operand has 456 places, 1773 transitions, 47758 flow. Second operand 57 states and 5226 transitions. [2023-08-30 12:11:36,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 2889 transitions, 90998 flow [2023-08-30 12:11:59,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 2889 transitions, 72572 flow, removed 9194 selfloop flow, removed 10 redundant places. [2023-08-30 12:11:59,213 INFO L231 Difference]: Finished difference. Result has 534 places, 2386 transitions, 62212 flow [2023-08-30 12:11:59,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=37009, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=924, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=62212, PETRI_PLACES=534, PETRI_TRANSITIONS=2386} [2023-08-30 12:11:59,216 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 506 predicate places. [2023-08-30 12:11:59,216 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 2386 transitions, 62212 flow [2023-08-30 12:11:59,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 88.325) internal successors, (3533), 40 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:11:59,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:11:59,217 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:11:59,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 12:11:59,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:11:59,423 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:11:59,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:11:59,423 INFO L85 PathProgramCache]: Analyzing trace with hash 671933619, now seen corresponding path program 13 times [2023-08-30 12:11:59,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:11:59,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341099136] [2023-08-30 12:11:59,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:11:59,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:11:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:12:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:12:00,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:12:00,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341099136] [2023-08-30 12:12:00,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341099136] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:12:00,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205546498] [2023-08-30 12:12:00,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 12:12:00,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:12:00,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:12:00,254 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:12:00,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 12:12:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:12:00,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 12:12:00,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:12:01,157 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:12:01,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:12:02,539 INFO L321 Elim1Store]: treesize reduction 101, result has 44.2 percent of original size [2023-08-30 12:12:02,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 343 treesize of output 276 [2023-08-30 12:12:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:12:05,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205546498] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:12:05,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:12:05,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-08-30 12:12:05,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256082058] [2023-08-30 12:12:05,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:12:05,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 12:12:05,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:12:05,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 12:12:05,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1517, Unknown=0, NotChecked=0, Total=1892 [2023-08-30 12:12:07,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 274 [2023-08-30 12:12:07,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 2386 transitions, 62212 flow. Second operand has 44 states, 44 states have (on average 92.22727272727273) internal successors, (4058), 44 states have internal predecessors, (4058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:12:07,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:12:07,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 274 [2023-08-30 12:12:07,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:12:42,514 INFO L130 PetriNetUnfolder]: 14675/25249 cut-off events. [2023-08-30 12:12:42,514 INFO L131 PetriNetUnfolder]: For 3206049/3206049 co-relation queries the response was YES. [2023-08-30 12:12:43,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328804 conditions, 25249 events. 14675/25249 cut-off events. For 3206049/3206049 co-relation queries the response was YES. Maximal size of possible extension queue 1379. Compared 207858 event pairs, 906 based on Foata normal form. 454/25702 useless extension candidates. Maximal degree in co-relation 328588. Up to 12293 conditions per place. [2023-08-30 12:12:43,956 INFO L137 encePairwiseOnDemand]: 266/274 looper letters, 2216 selfloop transitions, 1014 changer transitions 33/3263 dead transitions. [2023-08-30 12:12:43,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 3263 transitions, 95529 flow [2023-08-30 12:12:43,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-08-30 12:12:43,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2023-08-30 12:12:43,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 7062 transitions. [2023-08-30 12:12:43,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34829354902347603 [2023-08-30 12:12:43,962 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 7062 transitions. [2023-08-30 12:12:43,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 7062 transitions. [2023-08-30 12:12:43,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:12:43,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 7062 transitions. [2023-08-30 12:12:43,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 95.43243243243244) internal successors, (7062), 74 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:12:44,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 274.0) internal successors, (20550), 75 states have internal predecessors, (20550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:12:44,126 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 274.0) internal successors, (20550), 75 states have internal predecessors, (20550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:12:44,126 INFO L175 Difference]: Start difference. First operand has 534 places, 2386 transitions, 62212 flow. Second operand 74 states and 7062 transitions. [2023-08-30 12:12:44,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 3263 transitions, 95529 flow [2023-08-30 12:13:21,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 3263 transitions, 88331 flow, removed 3379 selfloop flow, removed 15 redundant places. [2023-08-30 12:13:21,114 INFO L231 Difference]: Finished difference. Result has 622 places, 2770 transitions, 77414 flow [2023-08-30 12:13:21,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=54314, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=547, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=77414, PETRI_PLACES=622, PETRI_TRANSITIONS=2770} [2023-08-30 12:13:21,116 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 594 predicate places. [2023-08-30 12:13:21,117 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 2770 transitions, 77414 flow [2023-08-30 12:13:21,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 92.22727272727273) internal successors, (4058), 44 states have internal predecessors, (4058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:13:21,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:13:21,118 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:13:21,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-30 12:13:21,322 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,SelfDestructingSolverStorable34 [2023-08-30 12:13:21,322 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 12:13:21,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:13:21,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1501342028, now seen corresponding path program 14 times [2023-08-30 12:13:21,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:13:21,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334353362] [2023-08-30 12:13:21,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:13:21,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:13:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:13:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:13:22,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:13:22,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334353362] [2023-08-30 12:13:22,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334353362] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:13:22,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075191586] [2023-08-30 12:13:22,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 12:13:22,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:13:22,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:13:22,792 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:13:22,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 12:13:22,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 12:13:22,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:13:22,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-30 12:13:22,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:13:23,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 12:13:23,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:13:23,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 12:13:23,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:13:23,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 12:13:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:13:23,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:13:25,639 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:13:25,639 INFO L350 Elim1Store]: Elim1 eliminated variable 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 244 treesize of output 160 [2023-08-30 12:13:25,841 INFO L321 Elim1Store]: treesize reduction 60, result has 73.8 percent of original size [2023-08-30 12:13:25,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 511 treesize of output 601 [2023-08-30 12:13:25,976 INFO L321 Elim1Store]: treesize reduction 60, result has 60.8 percent of original size [2023-08-30 12:13:25,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 428 treesize of output 412 [2023-08-30 12:13:26,101 INFO L321 Elim1Store]: treesize reduction 60, result has 60.8 percent of original size [2023-08-30 12:13:26,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 287 treesize of output 325 [2023-08-30 12:13:57,563 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:13:57,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075191586] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:13:57,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:13:57,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2023-08-30 12:13:57,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232567606] [2023-08-30 12:13:57,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:13:57,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-30 12:13:57,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:13:57,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-30 12:13:57,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=1712, Unknown=3, NotChecked=0, Total=2162 [2023-08-30 12:14:00,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 274 [2023-08-30 12:14:00,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 2770 transitions, 77414 flow. Second operand has 47 states, 47 states have (on average 73.14893617021276) internal successors, (3438), 47 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:14:00,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:14:00,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 274 [2023-08-30 12:14:00,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15