./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.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 c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 15:17:42,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 15:17:42,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 15:17:42,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 15:17:42,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 15:17:42,059 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 15:17:42,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 15:17:42,063 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 15:17:42,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 15:17:42,070 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 15:17:42,071 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 15:17:42,073 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 15:17:42,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 15:17:42,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 15:17:42,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 15:17:42,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 15:17:42,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 15:17:42,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 15:17:42,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 15:17:42,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 15:17:42,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 15:17:42,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 15:17:42,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 15:17:42,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 15:17:42,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 15:17:42,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 15:17:42,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 15:17:42,108 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 15:17:42,108 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 15:17:42,109 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 15:17:42,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 15:17:42,111 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 15:17:42,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 15:17:42,113 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 15:17:42,114 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 15:17:42,114 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 15:17:42,114 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 15:17:42,114 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 15:17:42,115 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 15:17:42,115 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 15:17:42,116 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 15:17:42,118 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 15:17:42,149 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 15:17:42,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 15:17:42,151 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 15:17:42,151 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 15:17:42,152 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 15:17:42,152 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 15:17:42,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 15:17:42,152 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 15:17:42,153 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 15:17:42,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 15:17:42,154 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 15:17:42,154 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 15:17:42,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 15:17:42,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 15:17:42,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 15:17:42,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 15:17:42,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 15:17:42,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 15:17:42,155 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 15:17:42,155 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 15:17:42,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 15:17:42,156 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 15:17:42,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 15:17:42,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 15:17:42,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 15:17:42,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 15:17:42,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:17:42,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 15:17:42,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 15:17:42,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 15:17:42,157 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 15:17:42,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 15:17:42,158 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 15:17:42,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 15:17:42,158 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 15:17:42,158 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 15:17:42,159 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 15:17:42,159 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 15:17:42,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 15:17:42,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 15:17:42,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 15:17:42,439 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 15:17:42,440 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 15:17:42,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c [2023-08-30 15:17:43,537 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 15:17:43,711 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 15:17:43,712 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c [2023-08-30 15:17:43,721 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19a839566/afed0444517d4f69872562cd65ca36d4/FLAG99234172b [2023-08-30 15:17:43,731 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19a839566/afed0444517d4f69872562cd65ca36d4 [2023-08-30 15:17:43,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 15:17:43,734 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 15:17:43,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 15:17:43,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 15:17:43,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 15:17:43,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:17:43" (1/1) ... [2023-08-30 15:17:43,744 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bd2e3cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:43, skipping insertion in model container [2023-08-30 15:17:43,745 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:17:43" (1/1) ... [2023-08-30 15:17:43,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 15:17:43,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 15:17:43,916 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2023-08-30 15:17:43,934 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:17:43,945 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 15:17:43,977 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2023-08-30 15:17:43,986 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:17:43,997 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:17:43,998 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:17:44,004 INFO L208 MainTranslator]: Completed translation [2023-08-30 15:17:44,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:44 WrapperNode [2023-08-30 15:17:44,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 15:17:44,006 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 15:17:44,006 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 15:17:44,006 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 15:17:44,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:44" (1/1) ... [2023-08-30 15:17:44,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:44" (1/1) ... [2023-08-30 15:17:44,056 INFO L138 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 180 [2023-08-30 15:17:44,057 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 15:17:44,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 15:17:44,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 15:17:44,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 15:17:44,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:44" (1/1) ... [2023-08-30 15:17:44,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:44" (1/1) ... [2023-08-30 15:17:44,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:44" (1/1) ... [2023-08-30 15:17:44,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:44" (1/1) ... [2023-08-30 15:17:44,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:44" (1/1) ... [2023-08-30 15:17:44,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:44" (1/1) ... [2023-08-30 15:17:44,100 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:44" (1/1) ... [2023-08-30 15:17:44,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:44" (1/1) ... [2023-08-30 15:17:44,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 15:17:44,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 15:17:44,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 15:17:44,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 15:17:44,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:44" (1/1) ... [2023-08-30 15:17:44,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:17:44,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:17:44,142 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 15:17:44,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 15:17:44,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 15:17:44,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 15:17:44,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 15:17:44,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 15:17:44,199 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 15:17:44,199 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 15:17:44,199 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 15:17:44,199 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 15:17:44,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 15:17:44,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 15:17:44,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 15:17:44,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 15:17:44,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 15:17:44,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 15:17:44,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 15:17:44,201 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 15:17:44,311 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 15:17:44,313 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 15:17:44,639 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 15:17:45,001 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 15:17:45,001 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 15:17:45,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:17:45 BoogieIcfgContainer [2023-08-30 15:17:45,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 15:17:45,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 15:17:45,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 15:17:45,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 15:17:45,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 03:17:43" (1/3) ... [2023-08-30 15:17:45,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c4a576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:17:45, skipping insertion in model container [2023-08-30 15:17:45,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:44" (2/3) ... [2023-08-30 15:17:45,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c4a576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:17:45, skipping insertion in model container [2023-08-30 15:17:45,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:17:45" (3/3) ... [2023-08-30 15:17:45,011 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2023-08-30 15:17:45,018 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 15:17:45,026 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 15:17:45,026 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-08-30 15:17:45,026 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 15:17:45,149 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 15:17:45,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 133 transitions, 282 flow [2023-08-30 15:17:45,265 INFO L130 PetriNetUnfolder]: 9/131 cut-off events. [2023-08-30 15:17:45,265 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 15:17:45,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 131 events. 9/131 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 189 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-08-30 15:17:45,270 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 133 transitions, 282 flow [2023-08-30 15:17:45,274 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 115 transitions, 239 flow [2023-08-30 15:17:45,278 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 15:17:45,292 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 115 transitions, 239 flow [2023-08-30 15:17:45,295 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 115 transitions, 239 flow [2023-08-30 15:17:45,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 115 transitions, 239 flow [2023-08-30 15:17:45,317 INFO L130 PetriNetUnfolder]: 8/115 cut-off events. [2023-08-30 15:17:45,317 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 15:17:45,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 115 events. 8/115 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 186 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-08-30 15:17:45,319 INFO L119 LiptonReduction]: Number of co-enabled transitions 1512 [2023-08-30 15:17:51,029 INFO L134 LiptonReduction]: Checked pairs total: 2936 [2023-08-30 15:17:51,030 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-30 15:17:51,043 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 15:17:51,048 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;@53293faf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 15:17:51,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2023-08-30 15:17:51,050 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 15:17:51,050 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 15:17:51,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:17:51,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 15:17:51,051 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:17:51,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:17:51,055 INFO L85 PathProgramCache]: Analyzing trace with hash 22832, now seen corresponding path program 1 times [2023-08-30 15:17:51,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:17:51,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879107665] [2023-08-30 15:17:51,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:17:51,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:17:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:17:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:17:51,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:17:51,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879107665] [2023-08-30 15:17:51,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879107665] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:17:51,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:17:51,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:17:51,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624712625] [2023-08-30 15:17:51,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:17:51,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:17:51,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:17:51,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:17:51,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:17:51,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 248 [2023-08-30 15:17:51,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:51,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:17:51,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 248 [2023-08-30 15:17:51,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:17:51,688 INFO L130 PetriNetUnfolder]: 1009/1495 cut-off events. [2023-08-30 15:17:51,689 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2023-08-30 15:17:51,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3042 conditions, 1495 events. 1009/1495 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 7828 event pairs, 560 based on Foata normal form. 0/526 useless extension candidates. Maximal degree in co-relation 1398. Up to 742 conditions per place. [2023-08-30 15:17:51,704 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 53 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-30 15:17:51,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 57 transitions, 242 flow [2023-08-30 15:17:51,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:17:51,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:17:51,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2023-08-30 15:17:51,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510752688172043 [2023-08-30 15:17:51,720 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 380 transitions. [2023-08-30 15:17:51,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 380 transitions. [2023-08-30 15:17:51,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:17:51,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 380 transitions. [2023-08-30 15:17:51,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:51,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:51,734 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:51,736 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 79 flow. Second operand 3 states and 380 transitions. [2023-08-30 15:17:51,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 57 transitions, 242 flow [2023-08-30 15:17:51,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 57 transitions, 232 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 15:17:51,742 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 80 flow [2023-08-30 15:17:51,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-08-30 15:17:51,746 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2023-08-30 15:17:51,746 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 80 flow [2023-08-30 15:17:51,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:51,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:17:51,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 15:17:51,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 15:17:51,748 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:17:51,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:17:51,748 INFO L85 PathProgramCache]: Analyzing trace with hash 708676, now seen corresponding path program 1 times [2023-08-30 15:17:51,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:17:51,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657212327] [2023-08-30 15:17:51,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:17:51,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:17:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:17:51,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:17:51,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:17:51,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657212327] [2023-08-30 15:17:51,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657212327] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:17:51,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:17:51,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:17:51,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402490784] [2023-08-30 15:17:51,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:17:51,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:17:51,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:17:51,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:17:51,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:17:51,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 248 [2023-08-30 15:17:51,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:51,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:17:51,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 248 [2023-08-30 15:17:51,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:17:52,006 INFO L130 PetriNetUnfolder]: 1009/1494 cut-off events. [2023-08-30 15:17:52,007 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 15:17:52,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3023 conditions, 1494 events. 1009/1494 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 7818 event pairs, 560 based on Foata normal form. 0/525 useless extension candidates. Maximal degree in co-relation 1509. Up to 1478 conditions per place. [2023-08-30 15:17:52,014 INFO L137 encePairwiseOnDemand]: 246/248 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-30 15:17:52,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 134 flow [2023-08-30 15:17:52,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:17:52,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:17:52,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2023-08-30 15:17:52,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46236559139784944 [2023-08-30 15:17:52,017 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2023-08-30 15:17:52,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2023-08-30 15:17:52,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:17:52,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2023-08-30 15:17:52,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:52,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:52,022 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:52,022 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 80 flow. Second operand 3 states and 344 transitions. [2023-08-30 15:17:52,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 134 flow [2023-08-30 15:17:52,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 132 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:17:52,024 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 76 flow [2023-08-30 15:17:52,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-08-30 15:17:52,025 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2023-08-30 15:17:52,025 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 76 flow [2023-08-30 15:17:52,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:52,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:17:52,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 15:17:52,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 15:17:52,026 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:17:52,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:17:52,029 INFO L85 PathProgramCache]: Analyzing trace with hash 708682, now seen corresponding path program 1 times [2023-08-30 15:17:52,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:17:52,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599860879] [2023-08-30 15:17:52,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:17:52,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:17:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:17:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:17:52,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:17:52,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599860879] [2023-08-30 15:17:52,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599860879] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:17:52,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262751536] [2023-08-30 15:17:52,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:17:52,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:17:52,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:17:52,145 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:17:52,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 15:17:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:17:52,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:17:52,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:17:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:17:52,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:17:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:17:52,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262751536] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:17:52,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:17:52,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 15:17:52,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367345398] [2023-08-30 15:17:52,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:17:52,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:17:52,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:17:52,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:17:52,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 15:17:52,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 248 [2023-08-30 15:17:52,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 76 flow. Second operand has 7 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 15:17:52,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:17:52,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 248 [2023-08-30 15:17:52,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:17:52,897 INFO L130 PetriNetUnfolder]: 2521/3732 cut-off events. [2023-08-30 15:17:52,898 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-30 15:17:52,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7541 conditions, 3732 events. 2521/3732 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 21812 event pairs, 1400 based on Foata normal form. 0/1323 useless extension candidates. Maximal degree in co-relation 7533. Up to 741 conditions per place. [2023-08-30 15:17:52,915 INFO L137 encePairwiseOnDemand]: 245/248 looper letters, 127 selfloop transitions, 5 changer transitions 0/134 dead transitions. [2023-08-30 15:17:52,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 134 transitions, 568 flow [2023-08-30 15:17:52,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 15:17:52,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 15:17:52,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 765 transitions. [2023-08-30 15:17:52,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141129032258065 [2023-08-30 15:17:52,918 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 765 transitions. [2023-08-30 15:17:52,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 765 transitions. [2023-08-30 15:17:52,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:17:52,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 765 transitions. [2023-08-30 15:17:52,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 127.5) internal successors, (765), 6 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:52,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:52,924 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:52,924 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 76 flow. Second operand 6 states and 765 transitions. [2023-08-30 15:17:52,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 134 transitions, 568 flow [2023-08-30 15:17:52,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 134 transitions, 567 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:17:52,927 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 111 flow [2023-08-30 15:17:52,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=111, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2023-08-30 15:17:52,928 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-30 15:17:52,928 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 111 flow [2023-08-30 15:17:52,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 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 15:17:52,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:17:52,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 15:17:52,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 15:17:53,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:17:53,140 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:17:53,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:17:53,140 INFO L85 PathProgramCache]: Analyzing trace with hash 681077476, now seen corresponding path program 1 times [2023-08-30 15:17:53,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:17:53,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134627279] [2023-08-30 15:17:53,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:17:53,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:17:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:17:53,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:17:53,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:17:53,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134627279] [2023-08-30 15:17:53,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134627279] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:17:53,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:17:53,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 15:17:53,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226659479] [2023-08-30 15:17:53,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:17:53,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 15:17:53,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:17:53,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 15:17:53,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 15:17:53,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 248 [2023-08-30 15:17:53,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 111 flow. Second operand has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:53,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:17:53,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 248 [2023-08-30 15:17:53,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:17:53,705 INFO L130 PetriNetUnfolder]: 1701/2758 cut-off events. [2023-08-30 15:17:53,705 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 15:17:53,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5601 conditions, 2758 events. 1701/2758 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 17096 event pairs, 1129 based on Foata normal form. 0/1183 useless extension candidates. Maximal degree in co-relation 5589. Up to 2511 conditions per place. [2023-08-30 15:17:53,717 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 57 selfloop transitions, 4 changer transitions 2/64 dead transitions. [2023-08-30 15:17:53,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 64 transitions, 303 flow [2023-08-30 15:17:53,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:17:53,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:17:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 560 transitions. [2023-08-30 15:17:53,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2023-08-30 15:17:53,719 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 560 transitions. [2023-08-30 15:17:53,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 560 transitions. [2023-08-30 15:17:53,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:17:53,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 560 transitions. [2023-08-30 15:17:53,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:53,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:53,724 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:53,724 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 111 flow. Second operand 5 states and 560 transitions. [2023-08-30 15:17:53,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 64 transitions, 303 flow [2023-08-30 15:17:53,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 64 transitions, 295 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 15:17:53,727 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 135 flow [2023-08-30 15:17:53,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=135, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2023-08-30 15:17:53,728 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 9 predicate places. [2023-08-30 15:17:53,728 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 135 flow [2023-08-30 15:17:53,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:53,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:17:53,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 15:17:53,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 15:17:53,729 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:17:53,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:17:53,729 INFO L85 PathProgramCache]: Analyzing trace with hash -361780400, now seen corresponding path program 1 times [2023-08-30 15:17:53,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:17:53,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139058355] [2023-08-30 15:17:53,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:17:53,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:17:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:17:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:17:53,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:17:53,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139058355] [2023-08-30 15:17:53,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139058355] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:17:53,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:17:53,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:17:53,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639392032] [2023-08-30 15:17:53,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:17:53,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:17:53,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:17:53,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:17:53,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:17:53,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 248 [2023-08-30 15:17:53,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 36 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:53,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:17:53,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 248 [2023-08-30 15:17:53,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:17:54,247 INFO L130 PetriNetUnfolder]: 2776/4126 cut-off events. [2023-08-30 15:17:54,248 INFO L131 PetriNetUnfolder]: For 209/238 co-relation queries the response was YES. [2023-08-30 15:17:54,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9332 conditions, 4126 events. 2776/4126 cut-off events. For 209/238 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 24658 event pairs, 379 based on Foata normal form. 29/1811 useless extension candidates. Maximal degree in co-relation 9316. Up to 3459 conditions per place. [2023-08-30 15:17:54,271 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 45 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2023-08-30 15:17:54,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 286 flow [2023-08-30 15:17:54,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:17:54,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:17:54,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2023-08-30 15:17:54,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49193548387096775 [2023-08-30 15:17:54,272 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2023-08-30 15:17:54,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2023-08-30 15:17:54,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:17:54,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2023-08-30 15:17:54,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:54,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:54,276 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:54,276 INFO L175 Difference]: Start difference. First operand has 48 places, 36 transitions, 135 flow. Second operand 3 states and 366 transitions. [2023-08-30 15:17:54,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 286 flow [2023-08-30 15:17:54,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 55 transitions, 280 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 15:17:54,279 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 182 flow [2023-08-30 15:17:54,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2023-08-30 15:17:54,280 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 10 predicate places. [2023-08-30 15:17:54,280 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 182 flow [2023-08-30 15:17:54,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:54,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:17:54,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 15:17:54,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 15:17:54,281 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:17:54,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:17:54,281 INFO L85 PathProgramCache]: Analyzing trace with hash -361780404, now seen corresponding path program 1 times [2023-08-30 15:17:54,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:17:54,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85159699] [2023-08-30 15:17:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:17:54,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:17:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:17:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:17:54,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:17:54,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85159699] [2023-08-30 15:17:54,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85159699] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:17:54,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930584835] [2023-08-30 15:17:54,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:17:54,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:17:54,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:17:54,494 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:17:54,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 15:17:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:17:54,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 15:17:54,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:17:54,653 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 15:17:54,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:17:54,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:17:54,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:17:54,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:17:54,733 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_103 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_103) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 9223372039002259456))) is different from false [2023-08-30 15:17:54,746 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:17:54,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-08-30 15:17:54,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:17:54,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 35 [2023-08-30 15:17:54,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-08-30 15:17:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 15:17:54,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930584835] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:17:54,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:17:54,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-30 15:17:54,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778194267] [2023-08-30 15:17:54,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:17:54,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 15:17:54,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:17:54,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 15:17:54,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2023-08-30 15:17:54,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 248 [2023-08-30 15:17:54,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 182 flow. Second operand has 12 states, 12 states have (on average 83.25) internal successors, (999), 12 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:54,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:17:54,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 248 [2023-08-30 15:17:54,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:17:55,457 INFO L130 PetriNetUnfolder]: 3288/5300 cut-off events. [2023-08-30 15:17:55,459 INFO L131 PetriNetUnfolder]: For 818/818 co-relation queries the response was YES. [2023-08-30 15:17:55,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14147 conditions, 5300 events. 3288/5300 cut-off events. For 818/818 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 36646 event pairs, 923 based on Foata normal form. 0/2772 useless extension candidates. Maximal degree in co-relation 14130. Up to 3113 conditions per place. [2023-08-30 15:17:55,494 INFO L137 encePairwiseOnDemand]: 235/248 looper letters, 76 selfloop transitions, 19 changer transitions 1/97 dead transitions. [2023-08-30 15:17:55,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 97 transitions, 572 flow [2023-08-30 15:17:55,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 15:17:55,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 15:17:55,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 737 transitions. [2023-08-30 15:17:55,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3714717741935484 [2023-08-30 15:17:55,498 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 737 transitions. [2023-08-30 15:17:55,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 737 transitions. [2023-08-30 15:17:55,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:17:55,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 737 transitions. [2023-08-30 15:17:55,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 92.125) internal successors, (737), 8 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:55,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 248.0) internal successors, (2232), 9 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:55,503 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 248.0) internal successors, (2232), 9 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:55,504 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 182 flow. Second operand 8 states and 737 transitions. [2023-08-30 15:17:55,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 97 transitions, 572 flow [2023-08-30 15:17:55,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 97 transitions, 555 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:17:55,509 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 297 flow [2023-08-30 15:17:55,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=297, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2023-08-30 15:17:55,512 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 18 predicate places. [2023-08-30 15:17:55,512 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 297 flow [2023-08-30 15:17:55,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 83.25) internal successors, (999), 12 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:55,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:17:55,513 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 15:17:55,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 15:17:55,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-30 15:17:55,726 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:17:55,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:17:55,726 INFO L85 PathProgramCache]: Analyzing trace with hash -361791946, now seen corresponding path program 2 times [2023-08-30 15:17:55,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:17:55,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153099074] [2023-08-30 15:17:55,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:17:55,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:17:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:17:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:17:55,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:17:55,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153099074] [2023-08-30 15:17:55,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153099074] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:17:55,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491841583] [2023-08-30 15:17:55,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:17:55,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:17:55,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:17:55,807 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:17:55,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 15:17:55,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:17:55,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:17:55,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 15:17:55,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:17:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:17:55,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:17:55,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491841583] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:17:55,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:17:55,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 15:17:55,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106126721] [2023-08-30 15:17:55,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:17:55,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:17:55,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:17:55,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:17:55,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 15:17:55,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 248 [2023-08-30 15:17:55,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 297 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:55,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:17:55,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 248 [2023-08-30 15:17:55,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:17:56,517 INFO L130 PetriNetUnfolder]: 3496/5445 cut-off events. [2023-08-30 15:17:56,517 INFO L131 PetriNetUnfolder]: For 2895/2924 co-relation queries the response was YES. [2023-08-30 15:17:56,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15671 conditions, 5445 events. 3496/5445 cut-off events. For 2895/2924 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 36658 event pairs, 1613 based on Foata normal form. 30/3257 useless extension candidates. Maximal degree in co-relation 15651. Up to 5382 conditions per place. [2023-08-30 15:17:56,577 INFO L137 encePairwiseOnDemand]: 246/248 looper letters, 50 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-30 15:17:56,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 55 transitions, 389 flow [2023-08-30 15:17:56,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:17:56,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:17:56,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2023-08-30 15:17:56,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4650537634408602 [2023-08-30 15:17:56,579 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2023-08-30 15:17:56,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2023-08-30 15:17:56,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:17:56,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2023-08-30 15:17:56,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:56,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:56,582 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:56,582 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 297 flow. Second operand 3 states and 346 transitions. [2023-08-30 15:17:56,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 55 transitions, 389 flow [2023-08-30 15:17:56,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 55 transitions, 368 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-08-30 15:17:56,589 INFO L231 Difference]: Finished difference. Result has 53 places, 55 transitions, 268 flow [2023-08-30 15:17:56,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=53, PETRI_TRANSITIONS=55} [2023-08-30 15:17:56,589 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 14 predicate places. [2023-08-30 15:17:56,590 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 55 transitions, 268 flow [2023-08-30 15:17:56,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:56,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:17:56,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 15:17:56,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 15:17:56,795 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 15:17:56,795 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:17:56,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:17:56,796 INFO L85 PathProgramCache]: Analyzing trace with hash -361780403, now seen corresponding path program 1 times [2023-08-30 15:17:56,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:17:56,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627154329] [2023-08-30 15:17:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:17:56,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:17:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:17:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:17:56,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:17:56,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627154329] [2023-08-30 15:17:56,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627154329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:17:56,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169150790] [2023-08-30 15:17:56,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:17:56,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:17:56,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:17:56,995 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:17:56,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 15:17:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:17:57,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 15:17:57,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:17:57,111 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 15:17:57,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:17:57,143 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 15:17:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:17:57,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:17:57,214 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:17:57,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-08-30 15:17:57,222 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:17:57,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2023-08-30 15:17:57,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-30 15:17:57,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:17:57,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169150790] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:17:57,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:17:57,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-30 15:17:57,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041098582] [2023-08-30 15:17:57,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:17:57,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 15:17:57,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:17:57,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 15:17:57,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-08-30 15:17:57,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 248 [2023-08-30 15:17:57,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 55 transitions, 268 flow. Second operand has 12 states, 12 states have (on average 88.25) internal successors, (1059), 12 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:57,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:17:57,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 248 [2023-08-30 15:17:57,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:17:58,062 INFO L130 PetriNetUnfolder]: 3324/5359 cut-off events. [2023-08-30 15:17:58,063 INFO L131 PetriNetUnfolder]: For 2232/2232 co-relation queries the response was YES. [2023-08-30 15:17:58,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14998 conditions, 5359 events. 3324/5359 cut-off events. For 2232/2232 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 37271 event pairs, 1055 based on Foata normal form. 0/3183 useless extension candidates. Maximal degree in co-relation 14981. Up to 3185 conditions per place. [2023-08-30 15:17:58,086 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 74 selfloop transitions, 21 changer transitions 1/97 dead transitions. [2023-08-30 15:17:58,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 97 transitions, 605 flow [2023-08-30 15:17:58,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 15:17:58,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 15:17:58,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 773 transitions. [2023-08-30 15:17:58,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961693548387094 [2023-08-30 15:17:58,090 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 773 transitions. [2023-08-30 15:17:58,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 773 transitions. [2023-08-30 15:17:58,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:17:58,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 773 transitions. [2023-08-30 15:17:58,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 96.625) internal successors, (773), 8 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:58,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 248.0) internal successors, (2232), 9 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:58,097 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 248.0) internal successors, (2232), 9 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:58,097 INFO L175 Difference]: Start difference. First operand has 53 places, 55 transitions, 268 flow. Second operand 8 states and 773 transitions. [2023-08-30 15:17:58,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 97 transitions, 605 flow [2023-08-30 15:17:58,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 97 transitions, 604 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:17:58,103 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 320 flow [2023-08-30 15:17:58,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=320, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2023-08-30 15:17:58,105 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 20 predicate places. [2023-08-30 15:17:58,105 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 320 flow [2023-08-30 15:17:58,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 88.25) internal successors, (1059), 12 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:58,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:17:58,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:17:58,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 15:17:58,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:17:58,315 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:17:58,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:17:58,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1684645338, now seen corresponding path program 1 times [2023-08-30 15:17:58,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:17:58,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586129343] [2023-08-30 15:17:58,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:17:58,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:17:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:17:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:17:58,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:17:58,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586129343] [2023-08-30 15:17:58,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586129343] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:17:58,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:17:58,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 15:17:58,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129226411] [2023-08-30 15:17:58,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:17:58,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 15:17:58,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:17:58,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 15:17:58,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 15:17:58,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 248 [2023-08-30 15:17:58,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 100.4) internal successors, (502), 5 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:58,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:17:58,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 248 [2023-08-30 15:17:58,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:17:58,883 INFO L130 PetriNetUnfolder]: 3092/5037 cut-off events. [2023-08-30 15:17:58,883 INFO L131 PetriNetUnfolder]: For 5814/5814 co-relation queries the response was YES. [2023-08-30 15:17:58,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15789 conditions, 5037 events. 3092/5037 cut-off events. For 5814/5814 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 34302 event pairs, 1683 based on Foata normal form. 0/3441 useless extension candidates. Maximal degree in co-relation 15771. Up to 4990 conditions per place. [2023-08-30 15:17:58,907 INFO L137 encePairwiseOnDemand]: 241/248 looper letters, 50 selfloop transitions, 2 changer transitions 15/69 dead transitions. [2023-08-30 15:17:58,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 69 transitions, 481 flow [2023-08-30 15:17:58,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:17:58,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:17:58,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 541 transitions. [2023-08-30 15:17:58,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43629032258064515 [2023-08-30 15:17:58,910 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 541 transitions. [2023-08-30 15:17:58,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 541 transitions. [2023-08-30 15:17:58,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:17:58,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 541 transitions. [2023-08-30 15:17:58,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:58,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:58,914 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:58,914 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 320 flow. Second operand 5 states and 541 transitions. [2023-08-30 15:17:58,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 69 transitions, 481 flow [2023-08-30 15:17:58,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 69 transitions, 472 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-30 15:17:58,919 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 308 flow [2023-08-30 15:17:58,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=62, PETRI_TRANSITIONS=54} [2023-08-30 15:17:58,920 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 23 predicate places. [2023-08-30 15:17:58,920 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 308 flow [2023-08-30 15:17:58,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.4) internal successors, (502), 5 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:58,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:17:58,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:17:58,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 15:17:58,923 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:17:58,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:17:58,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1669844309, now seen corresponding path program 1 times [2023-08-30 15:17:58,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:17:58,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488764008] [2023-08-30 15:17:58,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:17:58,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:17:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:17:59,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:17:59,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:17:59,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488764008] [2023-08-30 15:17:59,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488764008] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:17:59,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450955965] [2023-08-30 15:17:59,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:17:59,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:17:59,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:17:59,175 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:17:59,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 15:17:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:17:59,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 15:17:59,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:17:59,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 15:17:59,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:17:59,334 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 15:17:59,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:17:59,364 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 15:17:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:17:59,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:17:59,399 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_217 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_217) c_~A~0.base) c_~A~0.offset) 4294967296)) is different from false [2023-08-30 15:17:59,432 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:17:59,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2023-08-30 15:17:59,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:17:59,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 117 [2023-08-30 15:17:59,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-08-30 15:17:59,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-08-30 15:17:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:17:59,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450955965] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:17:59,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:17:59,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-30 15:17:59,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685120574] [2023-08-30 15:17:59,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:17:59,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 15:17:59,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:17:59,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 15:17:59,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=143, Unknown=1, NotChecked=24, Total=210 [2023-08-30 15:17:59,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 15:17:59,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 54 transitions, 308 flow. Second operand has 15 states, 15 states have (on average 80.26666666666667) internal successors, (1204), 15 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:59,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:17:59,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 15:17:59,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:00,338 INFO L130 PetriNetUnfolder]: 3709/6154 cut-off events. [2023-08-30 15:18:00,339 INFO L131 PetriNetUnfolder]: For 6260/6260 co-relation queries the response was YES. [2023-08-30 15:18:00,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19401 conditions, 6154 events. 3709/6154 cut-off events. For 6260/6260 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 45053 event pairs, 1340 based on Foata normal form. 348/4602 useless extension candidates. Maximal degree in co-relation 19380. Up to 2496 conditions per place. [2023-08-30 15:18:00,380 INFO L137 encePairwiseOnDemand]: 236/248 looper letters, 64 selfloop transitions, 21 changer transitions 0/86 dead transitions. [2023-08-30 15:18:00,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 615 flow [2023-08-30 15:18:00,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:18:00,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:18:00,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 617 transitions. [2023-08-30 15:18:00,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3554147465437788 [2023-08-30 15:18:00,383 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 617 transitions. [2023-08-30 15:18:00,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 617 transitions. [2023-08-30 15:18:00,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:00,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 617 transitions. [2023-08-30 15:18:00,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.14285714285714) internal successors, (617), 7 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:00,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:00,388 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:00,388 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 308 flow. Second operand 7 states and 617 transitions. [2023-08-30 15:18:00,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 615 flow [2023-08-30 15:18:00,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 552 flow, removed 27 selfloop flow, removed 8 redundant places. [2023-08-30 15:18:00,403 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 377 flow [2023-08-30 15:18:00,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=377, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2023-08-30 15:18:00,403 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 19 predicate places. [2023-08-30 15:18:00,404 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 377 flow [2023-08-30 15:18:00,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 80.26666666666667) internal successors, (1204), 15 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:00,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:00,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:00,412 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 15:18:00,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-30 15:18:00,610 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:00,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:00,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1669844308, now seen corresponding path program 1 times [2023-08-30 15:18:00,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:00,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597685327] [2023-08-30 15:18:00,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:00,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:00,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:00,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597685327] [2023-08-30 15:18:00,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597685327] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:00,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063831460] [2023-08-30 15:18:00,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:00,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:00,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:00,874 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:18:00,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 15:18:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:00,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 15:18:00,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:00,987 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 15:18:01,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:01,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:18:01,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:01,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:18:01,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:01,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:01,085 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_251 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_251) c_~A~0.base) c_~A~0.offset) 9223372039002259456))) is different from false [2023-08-30 15:18:01,118 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:01,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 15:18:01,125 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:01,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 69 [2023-08-30 15:18:01,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2023-08-30 15:18:01,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-08-30 15:18:01,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:01,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063831460] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:01,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:01,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-30 15:18:01,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246692772] [2023-08-30 15:18:01,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:01,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 15:18:01,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:01,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 15:18:01,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=142, Unknown=2, NotChecked=24, Total=210 [2023-08-30 15:18:01,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 15:18:01,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 377 flow. Second operand has 15 states, 15 states have (on average 80.26666666666667) internal successors, (1204), 15 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:01,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:01,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 15:18:01,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:01,891 INFO L130 PetriNetUnfolder]: 3521/5850 cut-off events. [2023-08-30 15:18:01,892 INFO L131 PetriNetUnfolder]: For 7517/7517 co-relation queries the response was YES. [2023-08-30 15:18:01,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18565 conditions, 5850 events. 3521/5850 cut-off events. For 7517/7517 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 42552 event pairs, 1236 based on Foata normal form. 116/3786 useless extension candidates. Maximal degree in co-relation 18548. Up to 2496 conditions per place. [2023-08-30 15:18:01,919 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 63 selfloop transitions, 21 changer transitions 0/85 dead transitions. [2023-08-30 15:18:01,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 85 transitions, 626 flow [2023-08-30 15:18:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:18:01,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:18:01,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 614 transitions. [2023-08-30 15:18:01,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35368663594470046 [2023-08-30 15:18:01,921 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 614 transitions. [2023-08-30 15:18:01,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 614 transitions. [2023-08-30 15:18:01,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:01,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 614 transitions. [2023-08-30 15:18:01,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.71428571428571) internal successors, (614), 7 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:01,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:01,926 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:01,926 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 377 flow. Second operand 7 states and 614 transitions. [2023-08-30 15:18:01,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 85 transitions, 626 flow [2023-08-30 15:18:01,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 85 transitions, 621 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 15:18:01,932 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 408 flow [2023-08-30 15:18:01,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=408, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2023-08-30 15:18:01,932 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 22 predicate places. [2023-08-30 15:18:01,932 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 408 flow [2023-08-30 15:18:01,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 80.26666666666667) internal successors, (1204), 15 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:01,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:01,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:01,943 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 15:18:02,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:02,138 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:02,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:02,139 INFO L85 PathProgramCache]: Analyzing trace with hash 225606470, now seen corresponding path program 1 times [2023-08-30 15:18:02,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:02,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992431623] [2023-08-30 15:18:02,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:02,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:02,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:02,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992431623] [2023-08-30 15:18:02,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992431623] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:02,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057965339] [2023-08-30 15:18:02,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:02,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:02,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:02,409 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:18:02,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 15:18:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:02,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 15:18:02,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:02,517 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 15:18:02,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:02,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:18:02,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:02,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:18:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:02,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:02,666 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:02,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 15:18:02,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:02,683 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 143 treesize of output 135 [2023-08-30 15:18:02,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-08-30 15:18:02,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-08-30 15:18:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:02,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057965339] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:02,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:02,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-30 15:18:02,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532475153] [2023-08-30 15:18:02,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:02,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 15:18:02,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:02,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 15:18:02,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=161, Unknown=5, NotChecked=0, Total=210 [2023-08-30 15:18:02,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 15:18:02,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 408 flow. Second operand has 15 states, 15 states have (on average 80.4) internal successors, (1206), 15 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:02,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:02,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 15:18:02,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:03,476 INFO L130 PetriNetUnfolder]: 3809/6834 cut-off events. [2023-08-30 15:18:03,476 INFO L131 PetriNetUnfolder]: For 14921/15317 co-relation queries the response was YES. [2023-08-30 15:18:03,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23073 conditions, 6834 events. 3809/6834 cut-off events. For 14921/15317 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 53800 event pairs, 740 based on Foata normal form. 396/5106 useless extension candidates. Maximal degree in co-relation 23056. Up to 2865 conditions per place. [2023-08-30 15:18:03,514 INFO L137 encePairwiseOnDemand]: 236/248 looper letters, 82 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2023-08-30 15:18:03,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 95 transitions, 886 flow [2023-08-30 15:18:03,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:18:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:18:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 615 transitions. [2023-08-30 15:18:03,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3542626728110599 [2023-08-30 15:18:03,518 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 615 transitions. [2023-08-30 15:18:03,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 615 transitions. [2023-08-30 15:18:03,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:03,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 615 transitions. [2023-08-30 15:18:03,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.85714285714286) internal successors, (615), 7 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:03,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:03,523 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:03,523 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 408 flow. Second operand 7 states and 615 transitions. [2023-08-30 15:18:03,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 95 transitions, 886 flow [2023-08-30 15:18:03,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 95 transitions, 864 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-30 15:18:03,530 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 450 flow [2023-08-30 15:18:03,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=450, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2023-08-30 15:18:03,531 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 26 predicate places. [2023-08-30 15:18:03,531 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 450 flow [2023-08-30 15:18:03,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 80.4) internal successors, (1206), 15 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:03,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:03,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:03,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 15:18:03,737 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 15:18:03,737 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:03,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:03,737 INFO L85 PathProgramCache]: Analyzing trace with hash 225606469, now seen corresponding path program 1 times [2023-08-30 15:18:03,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:03,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786183347] [2023-08-30 15:18:03,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:03,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:04,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:04,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786183347] [2023-08-30 15:18:04,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786183347] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:04,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720345128] [2023-08-30 15:18:04,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:04,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:04,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:04,021 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:18:04,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 15:18:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:04,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 15:18:04,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:04,135 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 15:18:04,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:04,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 15:18:04,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:04,194 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 15:18:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:04,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:04,234 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_319 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_319) c_~A~0.base) c_~A~0.offset) 9223372039002259456)) is different from false [2023-08-30 15:18:04,243 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_319 (Array Int Int)) (v_ArrVal_318 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_318) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_319) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 9223372039002259456)) is different from false [2023-08-30 15:18:04,257 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:04,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2023-08-30 15:18:04,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:04,264 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 63 treesize of output 59 [2023-08-30 15:18:04,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2023-08-30 15:18:04,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-08-30 15:18:04,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 15:18:04,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720345128] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:04,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:04,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-30 15:18:04,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172184288] [2023-08-30 15:18:04,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:04,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 15:18:04,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:04,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 15:18:04,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=122, Unknown=2, NotChecked=46, Total=210 [2023-08-30 15:18:04,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 15:18:04,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 450 flow. Second operand has 15 states, 15 states have (on average 80.4) internal successors, (1206), 15 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:04,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:04,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 15:18:04,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:04,973 INFO L130 PetriNetUnfolder]: 3585/6434 cut-off events. [2023-08-30 15:18:04,974 INFO L131 PetriNetUnfolder]: For 13692/14064 co-relation queries the response was YES. [2023-08-30 15:18:04,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25171 conditions, 6434 events. 3585/6434 cut-off events. For 13692/14064 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 49940 event pairs, 740 based on Foata normal form. 372/5634 useless extension candidates. Maximal degree in co-relation 25152. Up to 2785 conditions per place. [2023-08-30 15:18:05,010 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 81 selfloop transitions, 11 changer transitions 0/94 dead transitions. [2023-08-30 15:18:05,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 94 transitions, 906 flow [2023-08-30 15:18:05,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:18:05,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:18:05,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 612 transitions. [2023-08-30 15:18:05,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35253456221198154 [2023-08-30 15:18:05,012 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 612 transitions. [2023-08-30 15:18:05,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 612 transitions. [2023-08-30 15:18:05,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:05,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 612 transitions. [2023-08-30 15:18:05,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.42857142857143) internal successors, (612), 7 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:05,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:05,016 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:05,017 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 450 flow. Second operand 7 states and 612 transitions. [2023-08-30 15:18:05,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 94 transitions, 906 flow [2023-08-30 15:18:05,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 94 transitions, 901 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 15:18:05,027 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 463 flow [2023-08-30 15:18:05,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=463, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2023-08-30 15:18:05,028 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 29 predicate places. [2023-08-30 15:18:05,028 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 463 flow [2023-08-30 15:18:05,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 80.4) internal successors, (1206), 15 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:05,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:05,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:05,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 15:18:05,234 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 15:18:05,234 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:05,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:05,235 INFO L85 PathProgramCache]: Analyzing trace with hash 221402170, now seen corresponding path program 1 times [2023-08-30 15:18:05,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:05,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400255952] [2023-08-30 15:18:05,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:05,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:05,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:05,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400255952] [2023-08-30 15:18:05,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400255952] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:05,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832737889] [2023-08-30 15:18:05,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:05,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:05,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:05,297 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:18:05,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 15:18:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:05,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 15:18:05,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:05,439 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 15:18:05,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:05,483 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 15:18:05,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832737889] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:05,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:05,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-30 15:18:05,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838869897] [2023-08-30 15:18:05,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:05,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 15:18:05,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:05,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 15:18:05,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-30 15:18:05,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 15:18:05,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 463 flow. Second operand has 14 states, 14 states have (on average 97.5) internal successors, (1365), 14 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:05,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:05,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 15:18:05,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:06,328 INFO L130 PetriNetUnfolder]: 2986/5368 cut-off events. [2023-08-30 15:18:06,328 INFO L131 PetriNetUnfolder]: For 12620/13097 co-relation queries the response was YES. [2023-08-30 15:18:06,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21898 conditions, 5368 events. 2986/5368 cut-off events. For 12620/13097 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 40642 event pairs, 1889 based on Foata normal form. 597/5174 useless extension candidates. Maximal degree in co-relation 21879. Up to 3983 conditions per place. [2023-08-30 15:18:06,363 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 137 selfloop transitions, 13 changer transitions 3/154 dead transitions. [2023-08-30 15:18:06,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 154 transitions, 1377 flow [2023-08-30 15:18:06,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 15:18:06,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 15:18:06,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 972 transitions. [2023-08-30 15:18:06,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2023-08-30 15:18:06,367 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 972 transitions. [2023-08-30 15:18:06,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 972 transitions. [2023-08-30 15:18:06,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:06,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 972 transitions. [2023-08-30 15:18:06,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 108.0) internal successors, (972), 9 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:06,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:06,373 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:06,373 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 463 flow. Second operand 9 states and 972 transitions. [2023-08-30 15:18:06,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 154 transitions, 1377 flow [2023-08-30 15:18:06,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 154 transitions, 1350 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-30 15:18:06,384 INFO L231 Difference]: Finished difference. Result has 76 places, 69 transitions, 633 flow [2023-08-30 15:18:06,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=633, PETRI_PLACES=76, PETRI_TRANSITIONS=69} [2023-08-30 15:18:06,385 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 37 predicate places. [2023-08-30 15:18:06,385 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 69 transitions, 633 flow [2023-08-30 15:18:06,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 97.5) internal successors, (1365), 14 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:06,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:06,385 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:06,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 15:18:06,590 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 15:18:06,591 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:06,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:06,591 INFO L85 PathProgramCache]: Analyzing trace with hash -2059129778, now seen corresponding path program 2 times [2023-08-30 15:18:06,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:06,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578842051] [2023-08-30 15:18:06,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:06,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:06,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:06,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578842051] [2023-08-30 15:18:06,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578842051] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:06,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368097299] [2023-08-30 15:18:06,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:18:06,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:06,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:06,897 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:18:06,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 15:18:07,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:18:07,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:18:07,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 15:18:07,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:07,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 15:18:07,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:07,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 15:18:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:07,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:07,363 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:07,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2023-08-30 15:18:07,372 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:07,373 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 47 treesize of output 39 [2023-08-30 15:18:07,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2023-08-30 15:18:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:07,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368097299] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:07,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:07,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 15:18:07,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160899945] [2023-08-30 15:18:07,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:07,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 15:18:07,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:07,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 15:18:07,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-08-30 15:18:08,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 248 [2023-08-30 15:18:08,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 69 transitions, 633 flow. Second operand has 20 states, 20 states have (on average 89.35) internal successors, (1787), 20 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:08,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:08,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 248 [2023-08-30 15:18:08,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:11,330 INFO L130 PetriNetUnfolder]: 3863/6924 cut-off events. [2023-08-30 15:18:11,331 INFO L131 PetriNetUnfolder]: For 16163/16772 co-relation queries the response was YES. [2023-08-30 15:18:11,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29244 conditions, 6924 events. 3863/6924 cut-off events. For 16163/16772 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 54272 event pairs, 1206 based on Foata normal form. 643/6555 useless extension candidates. Maximal degree in co-relation 29221. Up to 2858 conditions per place. [2023-08-30 15:18:11,367 INFO L137 encePairwiseOnDemand]: 235/248 looper letters, 233 selfloop transitions, 99 changer transitions 3/336 dead transitions. [2023-08-30 15:18:11,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 336 transitions, 3129 flow [2023-08-30 15:18:11,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 15:18:11,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 15:18:11,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3799 transitions. [2023-08-30 15:18:11,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38296370967741933 [2023-08-30 15:18:11,377 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3799 transitions. [2023-08-30 15:18:11,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3799 transitions. [2023-08-30 15:18:11,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:11,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3799 transitions. [2023-08-30 15:18:11,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 94.975) internal successors, (3799), 40 states have internal predecessors, (3799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:11,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 248.0) internal successors, (10168), 41 states have internal predecessors, (10168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:11,399 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 248.0) internal successors, (10168), 41 states have internal predecessors, (10168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:11,399 INFO L175 Difference]: Start difference. First operand has 76 places, 69 transitions, 633 flow. Second operand 40 states and 3799 transitions. [2023-08-30 15:18:11,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 336 transitions, 3129 flow [2023-08-30 15:18:11,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 336 transitions, 3123 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 15:18:11,418 INFO L231 Difference]: Finished difference. Result has 122 places, 147 transitions, 1632 flow [2023-08-30 15:18:11,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1632, PETRI_PLACES=122, PETRI_TRANSITIONS=147} [2023-08-30 15:18:11,419 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 83 predicate places. [2023-08-30 15:18:11,419 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 147 transitions, 1632 flow [2023-08-30 15:18:11,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 89.35) internal successors, (1787), 20 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:11,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:11,420 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:11,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 15:18:11,626 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 15:18:11,626 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:11,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:11,627 INFO L85 PathProgramCache]: Analyzing trace with hash -2059129775, now seen corresponding path program 1 times [2023-08-30 15:18:11,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:11,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272691814] [2023-08-30 15:18:11,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:11,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:18:11,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:11,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272691814] [2023-08-30 15:18:11,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272691814] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:18:11,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:18:11,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 15:18:11,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098536799] [2023-08-30 15:18:11,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:18:11,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:18:11,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:11,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:18:11,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 15:18:11,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 248 [2023-08-30 15:18:11,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 147 transitions, 1632 flow. Second operand has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:11,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:11,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 248 [2023-08-30 15:18:11,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:12,501 INFO L130 PetriNetUnfolder]: 4334/7797 cut-off events. [2023-08-30 15:18:12,501 INFO L131 PetriNetUnfolder]: For 30169/30974 co-relation queries the response was YES. [2023-08-30 15:18:12,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35485 conditions, 7797 events. 4334/7797 cut-off events. For 30169/30974 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 62310 event pairs, 805 based on Foata normal form. 810/7947 useless extension candidates. Maximal degree in co-relation 35452. Up to 3572 conditions per place. [2023-08-30 15:18:12,539 INFO L137 encePairwiseOnDemand]: 236/248 looper letters, 171 selfloop transitions, 37 changer transitions 0/215 dead transitions. [2023-08-30 15:18:12,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 215 transitions, 2574 flow [2023-08-30 15:18:12,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:18:12,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:18:12,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 607 transitions. [2023-08-30 15:18:12,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48951612903225805 [2023-08-30 15:18:12,541 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 607 transitions. [2023-08-30 15:18:12,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 607 transitions. [2023-08-30 15:18:12,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:12,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 607 transitions. [2023-08-30 15:18:12,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.4) internal successors, (607), 5 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:12,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:12,545 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:12,545 INFO L175 Difference]: Start difference. First operand has 122 places, 147 transitions, 1632 flow. Second operand 5 states and 607 transitions. [2023-08-30 15:18:12,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 215 transitions, 2574 flow [2023-08-30 15:18:12,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 215 transitions, 2470 flow, removed 34 selfloop flow, removed 7 redundant places. [2023-08-30 15:18:12,611 INFO L231 Difference]: Finished difference. Result has 123 places, 170 transitions, 1988 flow [2023-08-30 15:18:12,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1453, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1988, PETRI_PLACES=123, PETRI_TRANSITIONS=170} [2023-08-30 15:18:12,611 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 84 predicate places. [2023-08-30 15:18:12,612 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 170 transitions, 1988 flow [2023-08-30 15:18:12,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:12,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:12,612 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:12,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 15:18:12,612 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:12,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:12,612 INFO L85 PathProgramCache]: Analyzing trace with hash -2059129777, now seen corresponding path program 1 times [2023-08-30 15:18:12,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:12,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384696970] [2023-08-30 15:18:12,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:12,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:12,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:12,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384696970] [2023-08-30 15:18:12,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384696970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:12,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894315278] [2023-08-30 15:18:12,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:12,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:12,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:12,829 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:18:12,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 15:18:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:12,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 15:18:12,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:12,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 15:18:13,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:13,007 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 15:18:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:13,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:13,108 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:13,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-08-30 15:18:13,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:13,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2023-08-30 15:18:13,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-08-30 15:18:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:13,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894315278] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:13,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:13,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-30 15:18:13,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832880931] [2023-08-30 15:18:13,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:13,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 15:18:13,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:13,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 15:18:13,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=253, Unknown=2, NotChecked=0, Total=306 [2023-08-30 15:18:13,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 248 [2023-08-30 15:18:13,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 170 transitions, 1988 flow. Second operand has 18 states, 18 states have (on average 95.33333333333333) internal successors, (1716), 18 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:13,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:13,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 248 [2023-08-30 15:18:13,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:14,534 INFO L130 PetriNetUnfolder]: 3579/6448 cut-off events. [2023-08-30 15:18:14,535 INFO L131 PetriNetUnfolder]: For 35815/36291 co-relation queries the response was YES. [2023-08-30 15:18:14,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33334 conditions, 6448 events. 3579/6448 cut-off events. For 35815/36291 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 49111 event pairs, 1475 based on Foata normal form. 484/6683 useless extension candidates. Maximal degree in co-relation 33297. Up to 3272 conditions per place. [2023-08-30 15:18:14,570 INFO L137 encePairwiseOnDemand]: 235/248 looper letters, 149 selfloop transitions, 95 changer transitions 0/245 dead transitions. [2023-08-30 15:18:14,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 245 transitions, 3166 flow [2023-08-30 15:18:14,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 15:18:14,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 15:18:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1325 transitions. [2023-08-30 15:18:14,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4109801488833747 [2023-08-30 15:18:14,575 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1325 transitions. [2023-08-30 15:18:14,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1325 transitions. [2023-08-30 15:18:14,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:14,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1325 transitions. [2023-08-30 15:18:14,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 101.92307692307692) internal successors, (1325), 13 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:14,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 248.0) internal successors, (3472), 14 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:14,581 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 248.0) internal successors, (3472), 14 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:14,581 INFO L175 Difference]: Start difference. First operand has 123 places, 170 transitions, 1988 flow. Second operand 13 states and 1325 transitions. [2023-08-30 15:18:14,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 245 transitions, 3166 flow [2023-08-30 15:18:14,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 245 transitions, 3162 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-30 15:18:14,642 INFO L231 Difference]: Finished difference. Result has 138 places, 177 transitions, 2322 flow [2023-08-30 15:18:14,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1971, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2322, PETRI_PLACES=138, PETRI_TRANSITIONS=177} [2023-08-30 15:18:14,642 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 99 predicate places. [2023-08-30 15:18:14,643 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 177 transitions, 2322 flow [2023-08-30 15:18:14,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 95.33333333333333) internal successors, (1716), 18 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:14,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:14,643 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:14,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 15:18:14,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 15:18:14,849 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:14,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:14,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2059129774, now seen corresponding path program 1 times [2023-08-30 15:18:14,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:14,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954287810] [2023-08-30 15:18:14,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:14,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:18:14,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:14,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954287810] [2023-08-30 15:18:14,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954287810] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:18:14,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:18:14,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 15:18:14,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945441266] [2023-08-30 15:18:14,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:18:14,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:18:14,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:14,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:18:14,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 15:18:14,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 248 [2023-08-30 15:18:14,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 177 transitions, 2322 flow. Second operand has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:14,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:14,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 248 [2023-08-30 15:18:14,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:15,644 INFO L130 PetriNetUnfolder]: 3216/5958 cut-off events. [2023-08-30 15:18:15,644 INFO L131 PetriNetUnfolder]: For 42336/42968 co-relation queries the response was YES. [2023-08-30 15:18:15,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31267 conditions, 5958 events. 3216/5958 cut-off events. For 42336/42968 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 45829 event pairs, 551 based on Foata normal form. 901/6605 useless extension candidates. Maximal degree in co-relation 31225. Up to 2512 conditions per place. [2023-08-30 15:18:15,674 INFO L137 encePairwiseOnDemand]: 236/248 looper letters, 190 selfloop transitions, 56 changer transitions 0/253 dead transitions. [2023-08-30 15:18:15,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 253 transitions, 3611 flow [2023-08-30 15:18:15,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:18:15,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:18:15,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 607 transitions. [2023-08-30 15:18:15,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48951612903225805 [2023-08-30 15:18:15,675 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 607 transitions. [2023-08-30 15:18:15,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 607 transitions. [2023-08-30 15:18:15,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:15,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 607 transitions. [2023-08-30 15:18:15,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.4) internal successors, (607), 5 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:15,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:15,678 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:15,678 INFO L175 Difference]: Start difference. First operand has 138 places, 177 transitions, 2322 flow. Second operand 5 states and 607 transitions. [2023-08-30 15:18:15,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 253 transitions, 3611 flow [2023-08-30 15:18:15,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 253 transitions, 3421 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-08-30 15:18:15,730 INFO L231 Difference]: Finished difference. Result has 139 places, 209 transitions, 2953 flow [2023-08-30 15:18:15,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2953, PETRI_PLACES=139, PETRI_TRANSITIONS=209} [2023-08-30 15:18:15,731 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 100 predicate places. [2023-08-30 15:18:15,731 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 209 transitions, 2953 flow [2023-08-30 15:18:15,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:15,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:15,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:15,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 15:18:15,731 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:15,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:15,732 INFO L85 PathProgramCache]: Analyzing trace with hash 2059478032, now seen corresponding path program 1 times [2023-08-30 15:18:15,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:15,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999060111] [2023-08-30 15:18:15,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:15,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:15,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:15,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999060111] [2023-08-30 15:18:15,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999060111] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:15,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109196732] [2023-08-30 15:18:15,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:15,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:15,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:15,801 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:18:15,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 15:18:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:15,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 15:18:15,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:15,942 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 15:18:15,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:15,983 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 15:18:15,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109196732] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:15,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:15,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-30 15:18:15,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548895466] [2023-08-30 15:18:15,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:15,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 15:18:15,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:15,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 15:18:15,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-30 15:18:16,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 15:18:16,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 209 transitions, 2953 flow. Second operand has 14 states, 14 states have (on average 97.64285714285714) internal successors, (1367), 14 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:16,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:16,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 15:18:16,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:16,784 INFO L130 PetriNetUnfolder]: 3059/5622 cut-off events. [2023-08-30 15:18:16,785 INFO L131 PetriNetUnfolder]: For 47800/48022 co-relation queries the response was YES. [2023-08-30 15:18:16,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32073 conditions, 5622 events. 3059/5622 cut-off events. For 47800/48022 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 42238 event pairs, 1618 based on Foata normal form. 396/5808 useless extension candidates. Maximal degree in co-relation 32027. Up to 4507 conditions per place. [2023-08-30 15:18:16,821 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 220 selfloop transitions, 8 changer transitions 46/280 dead transitions. [2023-08-30 15:18:16,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 280 transitions, 4289 flow [2023-08-30 15:18:16,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 15:18:16,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 15:18:16,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 946 transitions. [2023-08-30 15:18:16,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42383512544802865 [2023-08-30 15:18:16,823 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 946 transitions. [2023-08-30 15:18:16,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 946 transitions. [2023-08-30 15:18:16,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:16,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 946 transitions. [2023-08-30 15:18:16,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 105.11111111111111) internal successors, (946), 9 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:16,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:16,827 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:16,827 INFO L175 Difference]: Start difference. First operand has 139 places, 209 transitions, 2953 flow. Second operand 9 states and 946 transitions. [2023-08-30 15:18:16,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 280 transitions, 4289 flow [2023-08-30 15:18:16,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 280 transitions, 4283 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-30 15:18:16,908 INFO L231 Difference]: Finished difference. Result has 150 places, 189 transitions, 2663 flow [2023-08-30 15:18:16,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2663, PETRI_PLACES=150, PETRI_TRANSITIONS=189} [2023-08-30 15:18:16,908 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 111 predicate places. [2023-08-30 15:18:16,908 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 189 transitions, 2663 flow [2023-08-30 15:18:16,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 97.64285714285714) internal successors, (1367), 14 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:16,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:16,909 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:16,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 15:18:17,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:17,109 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:17,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:17,110 INFO L85 PathProgramCache]: Analyzing trace with hash 720584367, now seen corresponding path program 1 times [2023-08-30 15:18:17,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:17,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411681989] [2023-08-30 15:18:17,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:17,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:17,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:17,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411681989] [2023-08-30 15:18:17,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411681989] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:17,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800705936] [2023-08-30 15:18:17,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:17,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:17,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:17,357 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:18:17,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 15:18:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:17,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 15:18:17,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:17,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 15:18:17,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 15:18:17,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 15:18:17,555 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 15:18:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:17,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:17,614 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_511 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_511) c_~A~0.base) (+ c_~A~0.offset 4)) 4294967296)) is different from false [2023-08-30 15:18:17,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:17,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 15:18:17,656 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:17,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 129 [2023-08-30 15:18:17,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 15:18:17,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-30 15:18:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:17,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800705936] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:17,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:17,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-30 15:18:17,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799375845] [2023-08-30 15:18:17,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:17,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 15:18:17,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:17,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 15:18:17,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=4, NotChecked=26, Total=240 [2023-08-30 15:18:17,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 15:18:17,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 189 transitions, 2663 flow. Second operand has 16 states, 16 states have (on average 80.25) internal successors, (1284), 16 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:17,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:17,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 15:18:17,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:18,906 INFO L130 PetriNetUnfolder]: 3949/7225 cut-off events. [2023-08-30 15:18:18,906 INFO L131 PetriNetUnfolder]: For 71817/72207 co-relation queries the response was YES. [2023-08-30 15:18:18,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44191 conditions, 7225 events. 3949/7225 cut-off events. For 71817/72207 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 56254 event pairs, 1394 based on Foata normal form. 873/7800 useless extension candidates. Maximal degree in co-relation 44140. Up to 2680 conditions per place. [2023-08-30 15:18:18,958 INFO L137 encePairwiseOnDemand]: 236/248 looper letters, 203 selfloop transitions, 92 changer transitions 1/298 dead transitions. [2023-08-30 15:18:18,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 298 transitions, 4669 flow [2023-08-30 15:18:18,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 15:18:18,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 15:18:18,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 978 transitions. [2023-08-30 15:18:18,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3585043988269795 [2023-08-30 15:18:18,961 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 978 transitions. [2023-08-30 15:18:18,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 978 transitions. [2023-08-30 15:18:18,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:18,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 978 transitions. [2023-08-30 15:18:18,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 88.9090909090909) internal successors, (978), 11 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:18,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 248.0) internal successors, (2976), 12 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:18,966 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 248.0) internal successors, (2976), 12 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:18,966 INFO L175 Difference]: Start difference. First operand has 150 places, 189 transitions, 2663 flow. Second operand 11 states and 978 transitions. [2023-08-30 15:18:18,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 298 transitions, 4669 flow [2023-08-30 15:18:19,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 298 transitions, 4584 flow, removed 38 selfloop flow, removed 5 redundant places. [2023-08-30 15:18:19,065 INFO L231 Difference]: Finished difference. Result has 151 places, 215 transitions, 3470 flow [2023-08-30 15:18:19,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2604, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3470, PETRI_PLACES=151, PETRI_TRANSITIONS=215} [2023-08-30 15:18:19,066 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 112 predicate places. [2023-08-30 15:18:19,066 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 215 transitions, 3470 flow [2023-08-30 15:18:19,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 80.25) internal successors, (1284), 16 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:19,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:19,066 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:19,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 15:18:19,271 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,SelfDestructingSolverStorable19 [2023-08-30 15:18:19,272 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:19,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:19,272 INFO L85 PathProgramCache]: Analyzing trace with hash 720584366, now seen corresponding path program 1 times [2023-08-30 15:18:19,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:19,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623821013] [2023-08-30 15:18:19,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:19,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:19,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:19,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623821013] [2023-08-30 15:18:19,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623821013] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:19,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701990477] [2023-08-30 15:18:19,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:19,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:19,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:19,521 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:18:19,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 15:18:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:19,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 15:18:19,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:19,684 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 15:18:19,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:19,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:18:19,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:19,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:18:19,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:19,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:19,825 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_549 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_549) c_~A~0.base) (+ c_~A~0.offset 4)) 9223372039002259456))) is different from false [2023-08-30 15:18:19,832 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_548 (Array Int Int)) (v_ArrVal_549 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_548) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_549) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2023-08-30 15:18:19,840 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:19,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 15:18:19,846 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:19,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 75 [2023-08-30 15:18:19,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2023-08-30 15:18:19,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-08-30 15:18:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-30 15:18:19,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701990477] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:19,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:19,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-30 15:18:19,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597117081] [2023-08-30 15:18:19,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:19,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 15:18:19,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:19,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 15:18:19,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=288, Unknown=2, NotChecked=70, Total=420 [2023-08-30 15:18:19,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 15:18:19,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 215 transitions, 3470 flow. Second operand has 21 states, 21 states have (on average 80.33333333333333) internal successors, (1687), 21 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:19,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:19,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 15:18:19,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:21,124 INFO L130 PetriNetUnfolder]: 3788/6952 cut-off events. [2023-08-30 15:18:21,124 INFO L131 PetriNetUnfolder]: For 72278/72641 co-relation queries the response was YES. [2023-08-30 15:18:21,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44238 conditions, 6952 events. 3788/6952 cut-off events. For 72278/72641 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 53626 event pairs, 1305 based on Foata normal form. 474/7138 useless extension candidates. Maximal degree in co-relation 44187. Up to 2632 conditions per place. [2023-08-30 15:18:21,179 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 224 selfloop transitions, 96 changer transitions 0/322 dead transitions. [2023-08-30 15:18:21,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 322 transitions, 5241 flow [2023-08-30 15:18:21,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 15:18:21,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 15:18:21,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1155 transitions. [2023-08-30 15:18:21,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3582506203473945 [2023-08-30 15:18:21,181 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1155 transitions. [2023-08-30 15:18:21,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1155 transitions. [2023-08-30 15:18:21,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:21,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1155 transitions. [2023-08-30 15:18:21,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 88.84615384615384) internal successors, (1155), 13 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:21,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 248.0) internal successors, (3472), 14 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:21,187 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 248.0) internal successors, (3472), 14 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:21,187 INFO L175 Difference]: Start difference. First operand has 151 places, 215 transitions, 3470 flow. Second operand 13 states and 1155 transitions. [2023-08-30 15:18:21,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 322 transitions, 5241 flow [2023-08-30 15:18:21,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 322 transitions, 5175 flow, removed 11 selfloop flow, removed 7 redundant places. [2023-08-30 15:18:21,297 INFO L231 Difference]: Finished difference. Result has 155 places, 214 transitions, 3585 flow [2023-08-30 15:18:21,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=3393, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3585, PETRI_PLACES=155, PETRI_TRANSITIONS=214} [2023-08-30 15:18:21,297 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 116 predicate places. [2023-08-30 15:18:21,298 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 214 transitions, 3585 flow [2023-08-30 15:18:21,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 80.33333333333333) internal successors, (1687), 21 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:21,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:21,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:21,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 15:18:21,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:21,499 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:21,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:21,499 INFO L85 PathProgramCache]: Analyzing trace with hash 800334842, now seen corresponding path program 1 times [2023-08-30 15:18:21,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:21,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764108375] [2023-08-30 15:18:21,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:21,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:18:21,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:21,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764108375] [2023-08-30 15:18:21,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764108375] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:18:21,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:18:21,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 15:18:21,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816136961] [2023-08-30 15:18:21,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:18:21,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:18:21,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:21,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:18:21,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 15:18:21,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 248 [2023-08-30 15:18:21,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 214 transitions, 3585 flow. Second operand has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:21,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:21,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 248 [2023-08-30 15:18:21,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:22,324 INFO L130 PetriNetUnfolder]: 3190/5810 cut-off events. [2023-08-30 15:18:22,324 INFO L131 PetriNetUnfolder]: For 80540/81163 co-relation queries the response was YES. [2023-08-30 15:18:22,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36717 conditions, 5810 events. 3190/5810 cut-off events. For 80540/81163 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 43352 event pairs, 643 based on Foata normal form. 919/6453 useless extension candidates. Maximal degree in co-relation 36668. Up to 3272 conditions per place. [2023-08-30 15:18:22,359 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 185 selfloop transitions, 42 changer transitions 0/235 dead transitions. [2023-08-30 15:18:22,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 235 transitions, 3976 flow [2023-08-30 15:18:22,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:18:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:18:22,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 591 transitions. [2023-08-30 15:18:22,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47661290322580646 [2023-08-30 15:18:22,361 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 591 transitions. [2023-08-30 15:18:22,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 591 transitions. [2023-08-30 15:18:22,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:22,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 591 transitions. [2023-08-30 15:18:22,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.2) internal successors, (591), 5 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:22,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:22,364 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:22,364 INFO L175 Difference]: Start difference. First operand has 155 places, 214 transitions, 3585 flow. Second operand 5 states and 591 transitions. [2023-08-30 15:18:22,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 235 transitions, 3976 flow [2023-08-30 15:18:22,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 235 transitions, 3807 flow, removed 21 selfloop flow, removed 10 redundant places. [2023-08-30 15:18:22,436 INFO L231 Difference]: Finished difference. Result has 147 places, 180 transitions, 2795 flow [2023-08-30 15:18:22,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2676, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2795, PETRI_PLACES=147, PETRI_TRANSITIONS=180} [2023-08-30 15:18:22,437 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 108 predicate places. [2023-08-30 15:18:22,437 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 180 transitions, 2795 flow [2023-08-30 15:18:22,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:22,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:22,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:22,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 15:18:22,438 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:22,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:22,438 INFO L85 PathProgramCache]: Analyzing trace with hash 800334841, now seen corresponding path program 1 times [2023-08-30 15:18:22,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:22,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272045200] [2023-08-30 15:18:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:22,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:18:22,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:22,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272045200] [2023-08-30 15:18:22,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272045200] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:18:22,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:18:22,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 15:18:22,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98158535] [2023-08-30 15:18:22,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:18:22,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:18:22,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:22,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:18:22,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 15:18:22,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 248 [2023-08-30 15:18:22,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 180 transitions, 2795 flow. Second operand has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:22,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:22,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 248 [2023-08-30 15:18:22,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:23,111 INFO L130 PetriNetUnfolder]: 2690/4846 cut-off events. [2023-08-30 15:18:23,111 INFO L131 PetriNetUnfolder]: For 61753/62288 co-relation queries the response was YES. [2023-08-30 15:18:23,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29312 conditions, 4846 events. 2690/4846 cut-off events. For 61753/62288 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34456 event pairs, 488 based on Foata normal form. 815/5417 useless extension candidates. Maximal degree in co-relation 29265. Up to 2455 conditions per place. [2023-08-30 15:18:23,143 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 157 selfloop transitions, 28 changer transitions 8/198 dead transitions. [2023-08-30 15:18:23,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 198 transitions, 3042 flow [2023-08-30 15:18:23,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:18:23,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:18:23,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 589 transitions. [2023-08-30 15:18:23,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2023-08-30 15:18:23,144 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 589 transitions. [2023-08-30 15:18:23,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 589 transitions. [2023-08-30 15:18:23,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:23,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 589 transitions. [2023-08-30 15:18:23,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:23,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:23,146 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:23,146 INFO L175 Difference]: Start difference. First operand has 147 places, 180 transitions, 2795 flow. Second operand 5 states and 589 transitions. [2023-08-30 15:18:23,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 198 transitions, 3042 flow [2023-08-30 15:18:23,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 198 transitions, 2798 flow, removed 30 selfloop flow, removed 9 redundant places. [2023-08-30 15:18:23,214 INFO L231 Difference]: Finished difference. Result has 135 places, 135 transitions, 1801 flow [2023-08-30 15:18:23,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1801, PETRI_PLACES=135, PETRI_TRANSITIONS=135} [2023-08-30 15:18:23,215 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 96 predicate places. [2023-08-30 15:18:23,215 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 135 transitions, 1801 flow [2023-08-30 15:18:23,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:23,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:23,215 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:23,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 15:18:23,215 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:23,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:23,216 INFO L85 PathProgramCache]: Analyzing trace with hash 901596962, now seen corresponding path program 1 times [2023-08-30 15:18:23,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:23,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476415088] [2023-08-30 15:18:23,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:23,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:23,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:23,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476415088] [2023-08-30 15:18:23,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476415088] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:23,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663335424] [2023-08-30 15:18:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:23,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:23,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:23,472 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:18:23,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 15:18:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:23,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 15:18:23,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:23,639 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 15:18:23,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:23,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:18:23,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:23,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:18:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:23,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:23,793 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_617 (Array Int Int))) (< 0 (+ 4294967296 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_617) c_~A~0.base) (+ c_~A~0.offset 4))))) is different from false [2023-08-30 15:18:25,848 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:25,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 15:18:25,854 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:25,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 147 [2023-08-30 15:18:25,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-08-30 15:18:25,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2023-08-30 15:18:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:25,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663335424] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:25,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:25,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-30 15:18:25,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340026819] [2023-08-30 15:18:25,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:25,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 15:18:25,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:25,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 15:18:25,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=4, NotChecked=36, Total=420 [2023-08-30 15:18:25,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 15:18:25,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 135 transitions, 1801 flow. Second operand has 21 states, 21 states have (on average 80.42857142857143) internal successors, (1689), 21 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:25,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:25,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 15:18:25,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:26,967 INFO L130 PetriNetUnfolder]: 4022/7152 cut-off events. [2023-08-30 15:18:26,967 INFO L131 PetriNetUnfolder]: For 63204/63436 co-relation queries the response was YES. [2023-08-30 15:18:26,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39825 conditions, 7152 events. 4022/7152 cut-off events. For 63204/63436 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 52157 event pairs, 865 based on Foata normal form. 672/7600 useless extension candidates. Maximal degree in co-relation 39783. Up to 2152 conditions per place. [2023-08-30 15:18:27,014 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 285 selfloop transitions, 18 changer transitions 0/307 dead transitions. [2023-08-30 15:18:27,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 307 transitions, 5032 flow [2023-08-30 15:18:27,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 15:18:27,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 15:18:27,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 955 transitions. [2023-08-30 15:18:27,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3500733137829912 [2023-08-30 15:18:27,016 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 955 transitions. [2023-08-30 15:18:27,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 955 transitions. [2023-08-30 15:18:27,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:27,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 955 transitions. [2023-08-30 15:18:27,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 86.81818181818181) internal successors, (955), 11 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:27,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 248.0) internal successors, (2976), 12 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:27,020 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 248.0) internal successors, (2976), 12 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:27,020 INFO L175 Difference]: Start difference. First operand has 135 places, 135 transitions, 1801 flow. Second operand 11 states and 955 transitions. [2023-08-30 15:18:27,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 307 transitions, 5032 flow [2023-08-30 15:18:27,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 307 transitions, 4838 flow, removed 7 selfloop flow, removed 9 redundant places. [2023-08-30 15:18:27,117 INFO L231 Difference]: Finished difference. Result has 130 places, 139 transitions, 1821 flow [2023-08-30 15:18:27,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1821, PETRI_PLACES=130, PETRI_TRANSITIONS=139} [2023-08-30 15:18:27,118 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 91 predicate places. [2023-08-30 15:18:27,118 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 139 transitions, 1821 flow [2023-08-30 15:18:27,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 80.42857142857143) internal successors, (1689), 21 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:27,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:27,118 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:27,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 15:18:27,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:27,319 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:27,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:27,320 INFO L85 PathProgramCache]: Analyzing trace with hash 901596961, now seen corresponding path program 1 times [2023-08-30 15:18:27,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:27,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406560254] [2023-08-30 15:18:27,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:27,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:27,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:27,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406560254] [2023-08-30 15:18:27,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406560254] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:27,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178315868] [2023-08-30 15:18:27,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:27,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:27,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:27,581 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:18:27,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 15:18:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:27,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 15:18:27,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:27,735 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 15:18:27,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:27,760 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 15:18:27,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:27,794 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 15:18:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:27,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:27,864 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_655 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_655) c_~A~0.base) (+ c_~A~0.offset 4)) 9223372039002259456)) is different from false [2023-08-30 15:18:27,900 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:27,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 15:18:27,907 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:27,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 65 [2023-08-30 15:18:27,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-08-30 15:18:27,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2023-08-30 15:18:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:27,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178315868] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:27,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:27,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-30 15:18:27,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50620641] [2023-08-30 15:18:27,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:27,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 15:18:27,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:27,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 15:18:27,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=285, Unknown=3, NotChecked=34, Total=380 [2023-08-30 15:18:28,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 15:18:28,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 139 transitions, 1821 flow. Second operand has 20 states, 20 states have (on average 80.4) internal successors, (1608), 20 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:28,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:28,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 15:18:28,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:28,937 INFO L130 PetriNetUnfolder]: 3736/6646 cut-off events. [2023-08-30 15:18:28,937 INFO L131 PetriNetUnfolder]: For 53555/53771 co-relation queries the response was YES. [2023-08-30 15:18:28,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37886 conditions, 6646 events. 3736/6646 cut-off events. For 53555/53771 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 47742 event pairs, 795 based on Foata normal form. 436/6858 useless extension candidates. Maximal degree in co-relation 37847. Up to 2128 conditions per place. [2023-08-30 15:18:28,975 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 248 selfloop transitions, 18 changer transitions 0/270 dead transitions. [2023-08-30 15:18:28,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 270 transitions, 4259 flow [2023-08-30 15:18:28,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 15:18:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 15:18:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 863 transitions. [2023-08-30 15:18:28,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3479838709677419 [2023-08-30 15:18:28,976 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 863 transitions. [2023-08-30 15:18:28,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 863 transitions. [2023-08-30 15:18:28,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:28,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 863 transitions. [2023-08-30 15:18:28,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 86.3) internal successors, (863), 10 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:28,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 248.0) internal successors, (2728), 11 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:28,979 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 248.0) internal successors, (2728), 11 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:28,979 INFO L175 Difference]: Start difference. First operand has 130 places, 139 transitions, 1821 flow. Second operand 10 states and 863 transitions. [2023-08-30 15:18:28,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 270 transitions, 4259 flow [2023-08-30 15:18:29,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 270 transitions, 4228 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-30 15:18:29,017 INFO L231 Difference]: Finished difference. Result has 133 places, 138 transitions, 1819 flow [2023-08-30 15:18:29,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1783, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1819, PETRI_PLACES=133, PETRI_TRANSITIONS=138} [2023-08-30 15:18:29,018 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 94 predicate places. [2023-08-30 15:18:29,018 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 138 transitions, 1819 flow [2023-08-30 15:18:29,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 80.4) internal successors, (1608), 20 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:29,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:29,018 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:29,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 15:18:29,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-30 15:18:29,224 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:29,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:29,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1483277833, now seen corresponding path program 2 times [2023-08-30 15:18:29,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:29,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51642493] [2023-08-30 15:18:29,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:29,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:29,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:29,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51642493] [2023-08-30 15:18:29,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51642493] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:29,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674732102] [2023-08-30 15:18:29,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:18:29,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:29,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:29,317 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:18:29,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 15:18:29,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:18:29,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:18:29,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 15:18:29,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:29,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:29,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:29,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674732102] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:29,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:29,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 15:18:29,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004920336] [2023-08-30 15:18:29,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:29,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 15:18:29,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:29,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 15:18:29,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-08-30 15:18:29,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 15:18:29,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 138 transitions, 1819 flow. Second operand has 19 states, 19 states have (on average 97.57894736842105) internal successors, (1854), 19 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:29,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:29,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 15:18:29,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:30,621 INFO L130 PetriNetUnfolder]: 3703/6720 cut-off events. [2023-08-30 15:18:30,621 INFO L131 PetriNetUnfolder]: For 55071/55611 co-relation queries the response was YES. [2023-08-30 15:18:30,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37452 conditions, 6720 events. 3703/6720 cut-off events. For 55071/55611 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 50052 event pairs, 1638 based on Foata normal form. 858/7340 useless extension candidates. Maximal degree in co-relation 37414. Up to 3234 conditions per place. [2023-08-30 15:18:30,662 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 217 selfloop transitions, 33 changer transitions 7/258 dead transitions. [2023-08-30 15:18:30,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 258 transitions, 3487 flow [2023-08-30 15:18:30,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 15:18:30,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 15:18:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1268 transitions. [2023-08-30 15:18:30,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4260752688172043 [2023-08-30 15:18:30,663 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1268 transitions. [2023-08-30 15:18:30,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1268 transitions. [2023-08-30 15:18:30,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:30,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1268 transitions. [2023-08-30 15:18:30,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 105.66666666666667) internal successors, (1268), 12 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:30,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 248.0) internal successors, (3224), 13 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:30,729 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 248.0) internal successors, (3224), 13 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:30,729 INFO L175 Difference]: Start difference. First operand has 133 places, 138 transitions, 1819 flow. Second operand 12 states and 1268 transitions. [2023-08-30 15:18:30,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 258 transitions, 3487 flow [2023-08-30 15:18:30,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 258 transitions, 3373 flow, removed 9 selfloop flow, removed 8 redundant places. [2023-08-30 15:18:30,770 INFO L231 Difference]: Finished difference. Result has 138 places, 134 transitions, 1830 flow [2023-08-30 15:18:30,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1830, PETRI_PLACES=138, PETRI_TRANSITIONS=134} [2023-08-30 15:18:30,771 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 99 predicate places. [2023-08-30 15:18:30,771 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 134 transitions, 1830 flow [2023-08-30 15:18:30,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 97.57894736842105) internal successors, (1854), 19 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:30,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:30,771 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 15:18:30,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 15:18:30,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 15:18:30,972 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:30,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:30,972 INFO L85 PathProgramCache]: Analyzing trace with hash -378348503, now seen corresponding path program 2 times [2023-08-30 15:18:30,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:30,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378062743] [2023-08-30 15:18:30,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:30,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:31,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:31,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378062743] [2023-08-30 15:18:31,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378062743] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:31,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51569735] [2023-08-30 15:18:31,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:18:31,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:31,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:31,241 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:18:31,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 15:18:31,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:18:31,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:18:31,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 15:18:31,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:31,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 15:18:31,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:31,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:18:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:31,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:31,638 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:31,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-08-30 15:18:31,644 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:31,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2023-08-30 15:18:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:31,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51569735] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:31,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:31,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-08-30 15:18:31,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41988755] [2023-08-30 15:18:31,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:31,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 15:18:31,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:31,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 15:18:31,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=573, Unknown=1, NotChecked=0, Total=650 [2023-08-30 15:18:32,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 248 [2023-08-30 15:18:32,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 134 transitions, 1830 flow. Second operand has 26 states, 26 states have (on average 95.38461538461539) internal successors, (2480), 26 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:32,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:32,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 248 [2023-08-30 15:18:32,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:34,014 INFO L130 PetriNetUnfolder]: 3710/6731 cut-off events. [2023-08-30 15:18:34,015 INFO L131 PetriNetUnfolder]: For 47279/47823 co-relation queries the response was YES. [2023-08-30 15:18:34,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37927 conditions, 6731 events. 3710/6731 cut-off events. For 47279/47823 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 50093 event pairs, 1872 based on Foata normal form. 550/7039 useless extension candidates. Maximal degree in co-relation 37885. Up to 3541 conditions per place. [2023-08-30 15:18:34,054 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 139 selfloop transitions, 76 changer transitions 2/218 dead transitions. [2023-08-30 15:18:34,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 218 transitions, 3198 flow [2023-08-30 15:18:34,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 15:18:34,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 15:18:34,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1600 transitions. [2023-08-30 15:18:34,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2023-08-30 15:18:34,056 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1600 transitions. [2023-08-30 15:18:34,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1600 transitions. [2023-08-30 15:18:34,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:34,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1600 transitions. [2023-08-30 15:18:34,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 100.0) internal successors, (1600), 16 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:34,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 248.0) internal successors, (4216), 17 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:34,060 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 248.0) internal successors, (4216), 17 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:34,060 INFO L175 Difference]: Start difference. First operand has 138 places, 134 transitions, 1830 flow. Second operand 16 states and 1600 transitions. [2023-08-30 15:18:34,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 218 transitions, 3198 flow [2023-08-30 15:18:34,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 218 transitions, 3181 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-30 15:18:34,133 INFO L231 Difference]: Finished difference. Result has 151 places, 149 transitions, 2240 flow [2023-08-30 15:18:34,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1817, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2240, PETRI_PLACES=151, PETRI_TRANSITIONS=149} [2023-08-30 15:18:34,134 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 112 predicate places. [2023-08-30 15:18:34,134 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 149 transitions, 2240 flow [2023-08-30 15:18:34,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 95.38461538461539) internal successors, (2480), 26 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:34,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:34,134 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 15:18:34,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 15:18:34,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 15:18:34,335 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:34,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:34,335 INFO L85 PathProgramCache]: Analyzing trace with hash -705525188, now seen corresponding path program 3 times [2023-08-30 15:18:34,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:34,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225469402] [2023-08-30 15:18:34,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:34,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:34,637 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:34,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:34,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225469402] [2023-08-30 15:18:34,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225469402] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:34,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839178282] [2023-08-30 15:18:34,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:18:34,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:34,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:34,641 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:18:34,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 15:18:34,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 15:18:34,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:18:34,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 15:18:34,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:34,879 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 15:18:34,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:34,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 15:18:34,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:34,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:18:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:35,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:35,077 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_769 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_769) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2023-08-30 15:18:35,136 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 15:18:35,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 39 [2023-08-30 15:18:35,144 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:35,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2023-08-30 15:18:35,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-08-30 15:18:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-08-30 15:18:35,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839178282] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:35,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:35,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-30 15:18:35,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819759016] [2023-08-30 15:18:35,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:35,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 15:18:35,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:35,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 15:18:35,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=564, Unknown=9, NotChecked=48, Total=702 [2023-08-30 15:18:35,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 248 [2023-08-30 15:18:35,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 149 transitions, 2240 flow. Second operand has 27 states, 27 states have (on average 83.33333333333333) internal successors, (2250), 27 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:35,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:35,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 248 [2023-08-30 15:18:35,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:36,399 INFO L130 PetriNetUnfolder]: 3709/6730 cut-off events. [2023-08-30 15:18:36,399 INFO L131 PetriNetUnfolder]: For 51697/52237 co-relation queries the response was YES. [2023-08-30 15:18:36,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38844 conditions, 6730 events. 3709/6730 cut-off events. For 51697/52237 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 49761 event pairs, 1892 based on Foata normal form. 541/7029 useless extension candidates. Maximal degree in co-relation 38800. Up to 3540 conditions per place. [2023-08-30 15:18:36,454 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 137 selfloop transitions, 76 changer transitions 2/216 dead transitions. [2023-08-30 15:18:36,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 216 transitions, 3343 flow [2023-08-30 15:18:36,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 15:18:36,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 15:18:36,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1405 transitions. [2023-08-30 15:18:36,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35408266129032256 [2023-08-30 15:18:36,457 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1405 transitions. [2023-08-30 15:18:36,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1405 transitions. [2023-08-30 15:18:36,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:36,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1405 transitions. [2023-08-30 15:18:36,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 87.8125) internal successors, (1405), 16 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:36,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 248.0) internal successors, (4216), 17 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:36,461 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 248.0) internal successors, (4216), 17 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:36,461 INFO L175 Difference]: Start difference. First operand has 151 places, 149 transitions, 2240 flow. Second operand 16 states and 1405 transitions. [2023-08-30 15:18:36,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 216 transitions, 3343 flow [2023-08-30 15:18:36,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 216 transitions, 3284 flow, removed 12 selfloop flow, removed 7 redundant places. [2023-08-30 15:18:36,545 INFO L231 Difference]: Finished difference. Result has 159 places, 147 transitions, 2298 flow [2023-08-30 15:18:36,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2146, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2298, PETRI_PLACES=159, PETRI_TRANSITIONS=147} [2023-08-30 15:18:36,545 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 120 predicate places. [2023-08-30 15:18:36,545 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 147 transitions, 2298 flow [2023-08-30 15:18:36,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 83.33333333333333) internal successors, (2250), 27 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:36,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:36,546 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:36,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 15:18:36,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:36,751 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:36,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:36,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1156095568, now seen corresponding path program 2 times [2023-08-30 15:18:36,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:36,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211437568] [2023-08-30 15:18:36,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:36,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:37,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:37,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:37,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211437568] [2023-08-30 15:18:37,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211437568] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:37,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023759058] [2023-08-30 15:18:37,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:18:37,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:37,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:37,086 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:18:37,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 15:18:37,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:18:37,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:18:37,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 15:18:37,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:37,276 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 15:18:37,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:37,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:18:37,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:37,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:18:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:37,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:37,630 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:37,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 15:18:37,638 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:37,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 75 [2023-08-30 15:18:37,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2023-08-30 15:18:37,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-08-30 15:18:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:37,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023759058] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:37,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:37,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 15:18:37,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669972869] [2023-08-30 15:18:37,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:37,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 15:18:37,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:37,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 15:18:37,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=700, Unknown=17, NotChecked=0, Total=812 [2023-08-30 15:18:37,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 15:18:37,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 147 transitions, 2298 flow. Second operand has 29 states, 29 states have (on average 80.34482758620689) internal successors, (2330), 29 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:37,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:37,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 15:18:37,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:39,352 INFO L130 PetriNetUnfolder]: 4519/8176 cut-off events. [2023-08-30 15:18:39,352 INFO L131 PetriNetUnfolder]: For 76633/77273 co-relation queries the response was YES. [2023-08-30 15:18:39,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48230 conditions, 8176 events. 4519/8176 cut-off events. For 76633/77273 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 61119 event pairs, 1838 based on Foata normal form. 1030/8914 useless extension candidates. Maximal degree in co-relation 48185. Up to 2371 conditions per place. [2023-08-30 15:18:39,405 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 249 selfloop transitions, 64 changer transitions 2/316 dead transitions. [2023-08-30 15:18:39,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 316 transitions, 4599 flow [2023-08-30 15:18:39,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 15:18:39,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 15:18:39,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1330 transitions. [2023-08-30 15:18:39,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575268817204301 [2023-08-30 15:18:39,407 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1330 transitions. [2023-08-30 15:18:39,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1330 transitions. [2023-08-30 15:18:39,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:39,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1330 transitions. [2023-08-30 15:18:39,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 88.66666666666667) internal successors, (1330), 15 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:39,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:39,412 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:39,412 INFO L175 Difference]: Start difference. First operand has 159 places, 147 transitions, 2298 flow. Second operand 15 states and 1330 transitions. [2023-08-30 15:18:39,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 316 transitions, 4599 flow [2023-08-30 15:18:39,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 316 transitions, 4513 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-08-30 15:18:39,494 INFO L231 Difference]: Finished difference. Result has 164 places, 153 transitions, 2521 flow [2023-08-30 15:18:39,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2212, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2521, PETRI_PLACES=164, PETRI_TRANSITIONS=153} [2023-08-30 15:18:39,494 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 125 predicate places. [2023-08-30 15:18:39,495 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 153 transitions, 2521 flow [2023-08-30 15:18:39,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 80.34482758620689) internal successors, (2330), 29 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:39,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:39,495 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:39,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 15:18:39,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 15:18:39,697 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:39,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:39,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1148688151, now seen corresponding path program 2 times [2023-08-30 15:18:39,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:39,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30546924] [2023-08-30 15:18:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:39,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:39,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:39,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30546924] [2023-08-30 15:18:39,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30546924] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:39,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357385295] [2023-08-30 15:18:39,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:18:39,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:39,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:39,785 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:18:39,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 15:18:39,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:18:39,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:18:39,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 15:18:39,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:40,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:40,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:40,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357385295] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:40,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:40,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 15:18:40,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070511275] [2023-08-30 15:18:40,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:40,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 15:18:40,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:40,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 15:18:40,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-08-30 15:18:40,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 15:18:40,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 153 transitions, 2521 flow. Second operand has 19 states, 19 states have (on average 97.57894736842105) internal successors, (1854), 19 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:40,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:40,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 15:18:40,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:41,166 INFO L130 PetriNetUnfolder]: 4205/7658 cut-off events. [2023-08-30 15:18:41,167 INFO L131 PetriNetUnfolder]: For 90981/91139 co-relation queries the response was YES. [2023-08-30 15:18:41,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46877 conditions, 7658 events. 4205/7658 cut-off events. For 90981/91139 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 56644 event pairs, 2024 based on Foata normal form. 344/7778 useless extension candidates. Maximal degree in co-relation 46829. Up to 5214 conditions per place. [2023-08-30 15:18:41,215 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 135 selfloop transitions, 5 changer transitions 141/284 dead transitions. [2023-08-30 15:18:41,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 284 transitions, 5063 flow [2023-08-30 15:18:41,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 15:18:41,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 15:18:41,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1240 transitions. [2023-08-30 15:18:41,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-30 15:18:41,217 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1240 transitions. [2023-08-30 15:18:41,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1240 transitions. [2023-08-30 15:18:41,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:41,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1240 transitions. [2023-08-30 15:18:41,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 103.33333333333333) internal successors, (1240), 12 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:41,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 248.0) internal successors, (3224), 13 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:41,220 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 248.0) internal successors, (3224), 13 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:41,220 INFO L175 Difference]: Start difference. First operand has 164 places, 153 transitions, 2521 flow. Second operand 12 states and 1240 transitions. [2023-08-30 15:18:41,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 284 transitions, 5063 flow [2023-08-30 15:18:41,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 284 transitions, 4826 flow, removed 20 selfloop flow, removed 10 redundant places. [2023-08-30 15:18:41,297 INFO L231 Difference]: Finished difference. Result has 169 places, 114 transitions, 1820 flow [2023-08-30 15:18:41,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2404, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1820, PETRI_PLACES=169, PETRI_TRANSITIONS=114} [2023-08-30 15:18:41,298 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 130 predicate places. [2023-08-30 15:18:41,298 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 114 transitions, 1820 flow [2023-08-30 15:18:41,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 97.57894736842105) internal successors, (1854), 19 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:41,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:41,299 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:41,306 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 15:18:41,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:41,504 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:41,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:41,504 INFO L85 PathProgramCache]: Analyzing trace with hash 664683825, now seen corresponding path program 3 times [2023-08-30 15:18:41,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:41,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202850184] [2023-08-30 15:18:41,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:41,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:41,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:41,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202850184] [2023-08-30 15:18:41,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202850184] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:41,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992963918] [2023-08-30 15:18:41,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:18:41,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:41,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:41,786 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:18:41,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 15:18:41,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 15:18:41,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:18:41,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 15:18:41,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:42,001 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 15:18:42,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:42,041 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 15:18:42,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:42,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 15:18:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:42,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:42,196 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_887 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_887) c_~A~0.base) (+ c_~A~0.offset 8)) 4294967296)) is different from false [2023-08-30 15:18:42,237 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:42,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 15:18:42,244 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:42,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 65 [2023-08-30 15:18:42,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-08-30 15:18:42,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-08-30 15:18:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:42,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992963918] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:42,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:42,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-30 15:18:42,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889873041] [2023-08-30 15:18:42,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:42,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 15:18:42,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:42,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 15:18:42,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=567, Unknown=5, NotChecked=48, Total=702 [2023-08-30 15:18:42,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 15:18:42,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 114 transitions, 1820 flow. Second operand has 27 states, 27 states have (on average 80.37037037037037) internal successors, (2170), 27 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:42,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:42,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 15:18:42,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:43,435 INFO L130 PetriNetUnfolder]: 3375/6117 cut-off events. [2023-08-30 15:18:43,435 INFO L131 PetriNetUnfolder]: For 66384/66820 co-relation queries the response was YES. [2023-08-30 15:18:43,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39215 conditions, 6117 events. 3375/6117 cut-off events. For 66384/66820 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 44166 event pairs, 1168 based on Foata normal form. 530/6413 useless extension candidates. Maximal degree in co-relation 39175. Up to 1875 conditions per place. [2023-08-30 15:18:43,475 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 187 selfloop transitions, 46 changer transitions 0/234 dead transitions. [2023-08-30 15:18:43,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 234 transitions, 3490 flow [2023-08-30 15:18:43,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 15:18:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 15:18:43,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1219 transitions. [2023-08-30 15:18:43,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35109447004608296 [2023-08-30 15:18:43,477 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1219 transitions. [2023-08-30 15:18:43,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1219 transitions. [2023-08-30 15:18:43,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:43,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1219 transitions. [2023-08-30 15:18:43,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 87.07142857142857) internal successors, (1219), 14 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:43,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:43,480 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:43,480 INFO L175 Difference]: Start difference. First operand has 169 places, 114 transitions, 1820 flow. Second operand 14 states and 1219 transitions. [2023-08-30 15:18:43,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 234 transitions, 3490 flow [2023-08-30 15:18:43,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 234 transitions, 2962 flow, removed 60 selfloop flow, removed 29 redundant places. [2023-08-30 15:18:43,610 INFO L231 Difference]: Finished difference. Result has 133 places, 113 transitions, 1460 flow [2023-08-30 15:18:43,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1368, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1460, PETRI_PLACES=133, PETRI_TRANSITIONS=113} [2023-08-30 15:18:43,611 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 94 predicate places. [2023-08-30 15:18:43,611 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 113 transitions, 1460 flow [2023-08-30 15:18:43,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 80.37037037037037) internal successors, (2170), 27 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:43,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:43,611 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:43,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 15:18:43,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:43,813 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:43,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:43,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1593736533, now seen corresponding path program 3 times [2023-08-30 15:18:43,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:43,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277642549] [2023-08-30 15:18:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:43,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:43,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:44,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:44,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277642549] [2023-08-30 15:18:44,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277642549] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:44,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508509788] [2023-08-30 15:18:44,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:18:44,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:44,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:44,113 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:18:44,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 15:18:44,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 15:18:44,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:18:44,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 15:18:44,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:44,371 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 15:18:44,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:44,410 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 15:18:44,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:44,442 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 15:18:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:44,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:44,656 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:44,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 15:18:44,663 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:44,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 129 [2023-08-30 15:18:44,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-30 15:18:44,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 15:18:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:44,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508509788] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:44,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:44,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-30 15:18:44,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099895295] [2023-08-30 15:18:44,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:44,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 15:18:44,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:44,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 15:18:44,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=610, Unknown=8, NotChecked=0, Total=702 [2023-08-30 15:18:45,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 15:18:45,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 113 transitions, 1460 flow. Second operand has 27 states, 27 states have (on average 80.44444444444444) internal successors, (2172), 27 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:45,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:45,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 15:18:45,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:46,479 INFO L130 PetriNetUnfolder]: 4565/8262 cut-off events. [2023-08-30 15:18:46,479 INFO L131 PetriNetUnfolder]: For 56130/56274 co-relation queries the response was YES. [2023-08-30 15:18:46,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45275 conditions, 8262 events. 4565/8262 cut-off events. For 56130/56274 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 61131 event pairs, 960 based on Foata normal form. 576/8416 useless extension candidates. Maximal degree in co-relation 45248. Up to 2401 conditions per place. [2023-08-30 15:18:46,524 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 259 selfloop transitions, 21 changer transitions 0/283 dead transitions. [2023-08-30 15:18:46,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 283 transitions, 4476 flow [2023-08-30 15:18:46,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 15:18:46,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 15:18:46,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1216 transitions. [2023-08-30 15:18:46,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35023041474654376 [2023-08-30 15:18:46,526 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1216 transitions. [2023-08-30 15:18:46,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1216 transitions. [2023-08-30 15:18:46,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:46,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1216 transitions. [2023-08-30 15:18:46,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 86.85714285714286) internal successors, (1216), 14 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:46,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:46,531 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:46,531 INFO L175 Difference]: Start difference. First operand has 133 places, 113 transitions, 1460 flow. Second operand 14 states and 1216 transitions. [2023-08-30 15:18:46,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 283 transitions, 4476 flow [2023-08-30 15:18:46,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 283 transitions, 4109 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-08-30 15:18:46,570 INFO L231 Difference]: Finished difference. Result has 135 places, 117 transitions, 1454 flow [2023-08-30 15:18:46,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1454, PETRI_PLACES=135, PETRI_TRANSITIONS=117} [2023-08-30 15:18:46,571 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 96 predicate places. [2023-08-30 15:18:46,571 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 117 transitions, 1454 flow [2023-08-30 15:18:46,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 80.44444444444444) internal successors, (2172), 27 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:46,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:46,572 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:46,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 15:18:46,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:46,777 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:46,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:46,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1593736534, now seen corresponding path program 2 times [2023-08-30 15:18:46,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:46,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455605979] [2023-08-30 15:18:46,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:46,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:47,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:47,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455605979] [2023-08-30 15:18:47,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455605979] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:47,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717931568] [2023-08-30 15:18:47,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:18:47,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:47,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:47,089 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:18:47,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 15:18:47,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:18:47,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:18:47,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 15:18:47,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:47,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 15:18:47,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:47,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 15:18:47,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:47,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 15:18:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:47,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:47,560 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_971 (Array Int Int))) (< 0 (+ 4294967296 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_971) c_~A~0.base) (+ c_~A~0.offset 8))))) is different from false [2023-08-30 15:18:47,627 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:47,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 15:18:47,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:47,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 75 [2023-08-30 15:18:47,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2023-08-30 15:18:47,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-08-30 15:18:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:47,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717931568] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:47,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:47,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 15:18:47,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451624643] [2023-08-30 15:18:47,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:47,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 15:18:47,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:47,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 15:18:47,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=667, Unknown=6, NotChecked=52, Total=812 [2023-08-30 15:18:47,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 15:18:47,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 117 transitions, 1454 flow. Second operand has 29 states, 29 states have (on average 80.44827586206897) internal successors, (2333), 29 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:47,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:47,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 15:18:47,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:49,325 INFO L130 PetriNetUnfolder]: 4295/7776 cut-off events. [2023-08-30 15:18:49,326 INFO L131 PetriNetUnfolder]: For 47820/47956 co-relation queries the response was YES. [2023-08-30 15:18:49,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45251 conditions, 7776 events. 4295/7776 cut-off events. For 47820/47956 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 56747 event pairs, 880 based on Foata normal form. 352/7718 useless extension candidates. Maximal degree in co-relation 45223. Up to 2333 conditions per place. [2023-08-30 15:18:49,369 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 258 selfloop transitions, 21 changer transitions 0/282 dead transitions. [2023-08-30 15:18:49,370 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 282 transitions, 4169 flow [2023-08-30 15:18:49,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 15:18:49,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 15:18:49,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1213 transitions. [2023-08-30 15:18:49,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3493663594470046 [2023-08-30 15:18:49,371 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1213 transitions. [2023-08-30 15:18:49,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1213 transitions. [2023-08-30 15:18:49,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:49,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1213 transitions. [2023-08-30 15:18:49,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 86.64285714285714) internal successors, (1213), 14 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:49,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:49,374 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:49,375 INFO L175 Difference]: Start difference. First operand has 135 places, 117 transitions, 1454 flow. Second operand 14 states and 1213 transitions. [2023-08-30 15:18:49,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 282 transitions, 4169 flow [2023-08-30 15:18:49,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 282 transitions, 4080 flow, removed 1 selfloop flow, removed 13 redundant places. [2023-08-30 15:18:49,409 INFO L231 Difference]: Finished difference. Result has 135 places, 116 transitions, 1400 flow [2023-08-30 15:18:49,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1400, PETRI_PLACES=135, PETRI_TRANSITIONS=116} [2023-08-30 15:18:49,410 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 96 predicate places. [2023-08-30 15:18:49,410 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 116 transitions, 1400 flow [2023-08-30 15:18:49,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 80.44827586206897) internal successors, (2333), 29 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:49,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:49,411 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 15:18:49,415 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 15:18:49,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:49,611 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:49,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:49,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1479327255, now seen corresponding path program 3 times [2023-08-30 15:18:49,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:49,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45651832] [2023-08-30 15:18:49,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:49,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:49,735 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:49,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:49,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45651832] [2023-08-30 15:18:49,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45651832] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:49,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256859456] [2023-08-30 15:18:49,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:18:49,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:49,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:49,737 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 15:18:49,738 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 15:18:49,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 15:18:49,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:18:49,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 15:18:49,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:49,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:50,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256859456] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:50,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:50,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-30 15:18:50,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144699850] [2023-08-30 15:18:50,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:50,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 15:18:50,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:50,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 15:18:50,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2023-08-30 15:18:50,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 15:18:50,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 116 transitions, 1400 flow. Second operand has 24 states, 24 states have (on average 97.45833333333333) internal successors, (2339), 24 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:50,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:50,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 15:18:50,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:51,335 INFO L130 PetriNetUnfolder]: 3507/6416 cut-off events. [2023-08-30 15:18:51,335 INFO L131 PetriNetUnfolder]: For 37514/37930 co-relation queries the response was YES. [2023-08-30 15:18:51,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34333 conditions, 6416 events. 3507/6416 cut-off events. For 37514/37930 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 46484 event pairs, 1391 based on Foata normal form. 595/6732 useless extension candidates. Maximal degree in co-relation 34306. Up to 2415 conditions per place. [2023-08-30 15:18:51,363 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 271 selfloop transitions, 35 changer transitions 9/316 dead transitions. [2023-08-30 15:18:51,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 316 transitions, 4122 flow [2023-08-30 15:18:51,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 15:18:51,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 15:18:51,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1582 transitions. [2023-08-30 15:18:51,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252688172043011 [2023-08-30 15:18:51,365 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1582 transitions. [2023-08-30 15:18:51,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1582 transitions. [2023-08-30 15:18:51,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:51,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1582 transitions. [2023-08-30 15:18:51,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 105.46666666666667) internal successors, (1582), 15 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:51,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:51,370 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:51,370 INFO L175 Difference]: Start difference. First operand has 135 places, 116 transitions, 1400 flow. Second operand 15 states and 1582 transitions. [2023-08-30 15:18:51,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 316 transitions, 4122 flow [2023-08-30 15:18:51,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 316 transitions, 3934 flow, removed 11 selfloop flow, removed 12 redundant places. [2023-08-30 15:18:51,395 INFO L231 Difference]: Finished difference. Result has 142 places, 131 transitions, 1718 flow [2023-08-30 15:18:51,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1285, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1718, PETRI_PLACES=142, PETRI_TRANSITIONS=131} [2023-08-30 15:18:51,395 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 103 predicate places. [2023-08-30 15:18:51,395 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 131 transitions, 1718 flow [2023-08-30 15:18:51,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 97.45833333333333) internal successors, (2339), 24 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:51,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:51,396 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 15:18:51,400 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 15:18:51,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-30 15:18:51,596 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:51,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:51,597 INFO L85 PathProgramCache]: Analyzing trace with hash 595146538, now seen corresponding path program 4 times [2023-08-30 15:18:51,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:51,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728855944] [2023-08-30 15:18:51,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:51,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:51,908 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 15:18:51,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:51,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728855944] [2023-08-30 15:18:51,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728855944] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:51,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177583980] [2023-08-30 15:18:51,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:18:51,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:51,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:51,910 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 15:18:51,938 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 15:18:52,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:18:52,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:18:52,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 15:18:52,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:52,130 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 15:18:52,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:52,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:18:52,249 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 15:18:52,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:52,394 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:52,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-08-30 15:18:52,401 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:52,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2023-08-30 15:18:52,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-08-30 15:18:52,493 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 15:18:52,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177583980] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:52,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:52,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-30 15:18:52,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612063759] [2023-08-30 15:18:52,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:52,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 15:18:52,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:52,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 15:18:52,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=777, Unknown=2, NotChecked=0, Total=870 [2023-08-30 15:18:53,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 248 [2023-08-30 15:18:53,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 131 transitions, 1718 flow. Second operand has 30 states, 30 states have (on average 95.4) internal successors, (2862), 30 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:53,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:53,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 248 [2023-08-30 15:18:53,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:54,691 INFO L130 PetriNetUnfolder]: 3511/6421 cut-off events. [2023-08-30 15:18:54,691 INFO L131 PetriNetUnfolder]: For 35082/35510 co-relation queries the response was YES. [2023-08-30 15:18:54,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34984 conditions, 6421 events. 3511/6421 cut-off events. For 35082/35510 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 45855 event pairs, 1913 based on Foata normal form. 430/6570 useless extension candidates. Maximal degree in co-relation 34953. Up to 2829 conditions per place. [2023-08-30 15:18:54,726 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 169 selfloop transitions, 70 changer transitions 2/242 dead transitions. [2023-08-30 15:18:54,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 242 transitions, 3362 flow [2023-08-30 15:18:54,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 15:18:54,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 15:18:54,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1991 transitions. [2023-08-30 15:18:54,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40141129032258066 [2023-08-30 15:18:54,729 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1991 transitions. [2023-08-30 15:18:54,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1991 transitions. [2023-08-30 15:18:54,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:54,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1991 transitions. [2023-08-30 15:18:54,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 99.55) internal successors, (1991), 20 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:54,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:54,734 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:54,734 INFO L175 Difference]: Start difference. First operand has 142 places, 131 transitions, 1718 flow. Second operand 20 states and 1991 transitions. [2023-08-30 15:18:54,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 242 transitions, 3362 flow [2023-08-30 15:18:54,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 242 transitions, 3353 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 15:18:54,770 INFO L231 Difference]: Finished difference. Result has 160 places, 144 transitions, 2040 flow [2023-08-30 15:18:54,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2040, PETRI_PLACES=160, PETRI_TRANSITIONS=144} [2023-08-30 15:18:54,770 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 121 predicate places. [2023-08-30 15:18:54,771 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 144 transitions, 2040 flow [2023-08-30 15:18:54,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 95.4) internal successors, (2862), 30 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:54,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:54,771 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 15:18:54,777 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 15:18:54,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-30 15:18:54,975 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:54,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:54,975 INFO L85 PathProgramCache]: Analyzing trace with hash 595146539, now seen corresponding path program 4 times [2023-08-30 15:18:54,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:54,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159815035] [2023-08-30 15:18:54,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:54,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:55,304 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 15:18:55,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:55,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159815035] [2023-08-30 15:18:55,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159815035] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:55,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942714438] [2023-08-30 15:18:55,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:18:55,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:55,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:55,305 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 15:18:55,307 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 15:18:55,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:18:55,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:18:55,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 15:18:55,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:55,505 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 15:18:55,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:55,539 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 15:18:55,632 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 15:18:55,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:55,735 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1087 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1087) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-30 15:18:55,744 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:55,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-08-30 15:18:55,750 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:55,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2023-08-30 15:18:55,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-08-30 15:18:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-08-30 15:18:55,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942714438] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:55,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:55,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-30 15:18:55,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218711679] [2023-08-30 15:18:55,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:55,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 15:18:55,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:55,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 15:18:55,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=726, Unknown=1, NotChecked=54, Total=870 [2023-08-30 15:18:55,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 248 [2023-08-30 15:18:55,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 144 transitions, 2040 flow. Second operand has 30 states, 30 states have (on average 83.4) internal successors, (2502), 30 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:55,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:55,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 248 [2023-08-30 15:18:55,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:57,066 INFO L130 PetriNetUnfolder]: 3510/6419 cut-off events. [2023-08-30 15:18:57,067 INFO L131 PetriNetUnfolder]: For 37919/38347 co-relation queries the response was YES. [2023-08-30 15:18:57,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35894 conditions, 6419 events. 3510/6419 cut-off events. For 37919/38347 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 45769 event pairs, 1897 based on Foata normal form. 429/6567 useless extension candidates. Maximal degree in co-relation 35859. Up to 2828 conditions per place. [2023-08-30 15:18:57,116 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 168 selfloop transitions, 69 changer transitions 2/240 dead transitions. [2023-08-30 15:18:57,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 240 transitions, 3497 flow [2023-08-30 15:18:57,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 15:18:57,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 15:18:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1748 transitions. [2023-08-30 15:18:57,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3524193548387097 [2023-08-30 15:18:57,119 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1748 transitions. [2023-08-30 15:18:57,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1748 transitions. [2023-08-30 15:18:57,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:57,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1748 transitions. [2023-08-30 15:18:57,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 87.4) internal successors, (1748), 20 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:57,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:57,125 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:57,125 INFO L175 Difference]: Start difference. First operand has 160 places, 144 transitions, 2040 flow. Second operand 20 states and 1748 transitions. [2023-08-30 15:18:57,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 240 transitions, 3497 flow [2023-08-30 15:18:57,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 240 transitions, 3438 flow, removed 10 selfloop flow, removed 8 redundant places. [2023-08-30 15:18:57,189 INFO L231 Difference]: Finished difference. Result has 171 places, 142 transitions, 2090 flow [2023-08-30 15:18:57,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1952, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2090, PETRI_PLACES=171, PETRI_TRANSITIONS=142} [2023-08-30 15:18:57,190 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 132 predicate places. [2023-08-30 15:18:57,190 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 142 transitions, 2090 flow [2023-08-30 15:18:57,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 83.4) internal successors, (2502), 30 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:57,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:57,191 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:57,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-30 15:18:57,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-30 15:18:57,397 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:57,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:57,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1202323537, now seen corresponding path program 4 times [2023-08-30 15:18:57,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:57,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364137516] [2023-08-30 15:18:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:57,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:57,771 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 15:18:57,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:57,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364137516] [2023-08-30 15:18:57,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364137516] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:57,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668244227] [2023-08-30 15:18:57,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:18:57,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:57,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:57,773 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 15:18:57,781 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 15:18:57,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:18:57,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:18:57,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 15:18:57,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:58,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 15:18:58,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:58,045 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 15:18:58,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:58,099 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 15:18:58,190 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 15:18:58,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:58,303 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1133 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1133) c_~A~0.base) (+ c_~A~0.offset 12)) 4294967296)) is different from false [2023-08-30 15:18:58,381 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:58,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 15:18:58,388 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:58,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 65 [2023-08-30 15:18:58,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-08-30 15:18:58,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2023-08-30 15:18:58,531 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 15:18:58,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668244227] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:58,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:58,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2023-08-30 15:18:58,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619864183] [2023-08-30 15:18:58,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:58,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 15:18:58,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:58,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 15:18:58,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=950, Unknown=8, NotChecked=62, Total=1122 [2023-08-30 15:18:58,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 15:18:58,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 142 transitions, 2090 flow. Second operand has 34 states, 34 states have (on average 80.38235294117646) internal successors, (2733), 34 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:58,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:58,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 15:18:58,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:19:00,464 INFO L130 PetriNetUnfolder]: 4017/7322 cut-off events. [2023-08-30 15:19:00,465 INFO L131 PetriNetUnfolder]: For 50173/50649 co-relation queries the response was YES. [2023-08-30 15:19:00,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41725 conditions, 7322 events. 4017/7322 cut-off events. For 50173/50649 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 52443 event pairs, 1727 based on Foata normal form. 627/7642 useless extension candidates. Maximal degree in co-relation 41690. Up to 2202 conditions per place. [2023-08-30 15:19:00,514 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 310 selfloop transitions, 66 changer transitions 2/379 dead transitions. [2023-08-30 15:19:00,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 379 transitions, 5185 flow [2023-08-30 15:19:00,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 15:19:00,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 15:19:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1593 transitions. [2023-08-30 15:19:00,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35685483870967744 [2023-08-30 15:19:00,517 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1593 transitions. [2023-08-30 15:19:00,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1593 transitions. [2023-08-30 15:19:00,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:19:00,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1593 transitions. [2023-08-30 15:19:00,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 88.5) internal successors, (1593), 18 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:00,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 248.0) internal successors, (4712), 19 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:00,523 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 248.0) internal successors, (4712), 19 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:00,523 INFO L175 Difference]: Start difference. First operand has 171 places, 142 transitions, 2090 flow. Second operand 18 states and 1593 transitions. [2023-08-30 15:19:00,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 379 transitions, 5185 flow [2023-08-30 15:19:00,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 379 transitions, 5079 flow, removed 2 selfloop flow, removed 17 redundant places. [2023-08-30 15:19:00,579 INFO L231 Difference]: Finished difference. Result has 173 places, 148 transitions, 2270 flow [2023-08-30 15:19:00,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2270, PETRI_PLACES=173, PETRI_TRANSITIONS=148} [2023-08-30 15:19:00,579 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 134 predicate places. [2023-08-30 15:19:00,580 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 148 transitions, 2270 flow [2023-08-30 15:19:00,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 80.38235294117646) internal successors, (2733), 34 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:00,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:19:00,580 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:19:00,585 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 15:19:00,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:00,781 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:19:00,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:19:00,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1722490339, now seen corresponding path program 4 times [2023-08-30 15:19:00,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:19:00,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884341721] [2023-08-30 15:19:00,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:00,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:19:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:00,887 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:00,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:19:00,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884341721] [2023-08-30 15:19:00,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884341721] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:19:00,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425250509] [2023-08-30 15:19:00,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:19:00,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:00,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:19:00,889 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 15:19:00,890 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 15:19:01,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:19:01,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:19:01,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 15:19:01,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:19:01,115 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:01,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:19:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:01,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425250509] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:19:01,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:19:01,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-30 15:19:01,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414642358] [2023-08-30 15:19:01,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:19:01,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 15:19:01,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:19:01,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 15:19:01,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2023-08-30 15:19:01,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 15:19:01,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 148 transitions, 2270 flow. Second operand has 24 states, 24 states have (on average 97.54166666666667) internal successors, (2341), 24 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:01,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:19:01,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 15:19:01,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:19:02,309 INFO L130 PetriNetUnfolder]: 3573/6560 cut-off events. [2023-08-30 15:19:02,309 INFO L131 PetriNetUnfolder]: For 57836/58029 co-relation queries the response was YES. [2023-08-30 15:19:02,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38092 conditions, 6560 events. 3573/6560 cut-off events. For 57836/58029 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 46306 event pairs, 1514 based on Foata normal form. 415/6742 useless extension candidates. Maximal degree in co-relation 38055. Up to 3723 conditions per place. [2023-08-30 15:19:02,350 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 130 selfloop transitions, 6 changer transitions 183/321 dead transitions. [2023-08-30 15:19:02,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 321 transitions, 5475 flow [2023-08-30 15:19:02,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 15:19:02,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 15:19:02,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1544 transitions. [2023-08-30 15:19:02,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4150537634408602 [2023-08-30 15:19:02,353 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1544 transitions. [2023-08-30 15:19:02,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1544 transitions. [2023-08-30 15:19:02,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:19:02,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1544 transitions. [2023-08-30 15:19:02,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 102.93333333333334) internal successors, (1544), 15 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:02,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:02,357 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:02,357 INFO L175 Difference]: Start difference. First operand has 173 places, 148 transitions, 2270 flow. Second operand 15 states and 1544 transitions. [2023-08-30 15:19:02,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 321 transitions, 5475 flow [2023-08-30 15:19:02,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 321 transitions, 5138 flow, removed 20 selfloop flow, removed 12 redundant places. [2023-08-30 15:19:02,414 INFO L231 Difference]: Finished difference. Result has 180 places, 104 transitions, 1542 flow [2023-08-30 15:19:02,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2144, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1542, PETRI_PLACES=180, PETRI_TRANSITIONS=104} [2023-08-30 15:19:02,414 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 141 predicate places. [2023-08-30 15:19:02,415 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 104 transitions, 1542 flow [2023-08-30 15:19:02,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 97.54166666666667) internal successors, (2341), 24 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:02,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:19:02,415 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-30 15:19:02,421 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 15:19:02,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 15:19:02,621 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:19:02,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:19:02,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1466216074, now seen corresponding path program 3 times [2023-08-30 15:19:02,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:19:02,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239508833] [2023-08-30 15:19:02,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:02,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:19:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:02,987 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 15:19:02,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:19:02,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239508833] [2023-08-30 15:19:02,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239508833] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:19:02,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313712308] [2023-08-30 15:19:02,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:19:02,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:02,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:19:02,989 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 15:19:02,991 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 15:19:03,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 15:19:03,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:19:03,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 15:19:03,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:19:03,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 15:19:03,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:03,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 15:19:03,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:03,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 15:19:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:03,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:19:03,959 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:03,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-08-30 15:19:03,969 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:03,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 159 [2023-08-30 15:19:03,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2023-08-30 15:19:03,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2023-08-30 15:19:04,347 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:04,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313712308] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:19:04,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:19:04,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-30 15:19:04,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145457878] [2023-08-30 15:19:04,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:19:04,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 15:19:04,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:19:04,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 15:19:04,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1057, Unknown=1, NotChecked=0, Total=1190 [2023-08-30 15:19:07,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 248 [2023-08-30 15:19:07,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 104 transitions, 1542 flow. Second operand has 35 states, 35 states have (on average 75.37142857142857) internal successors, (2638), 35 states have internal predecessors, (2638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:07,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:19:07,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 248 [2023-08-30 15:19:07,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:19:35,555 INFO L130 PetriNetUnfolder]: 7134/12852 cut-off events. [2023-08-30 15:19:35,555 INFO L131 PetriNetUnfolder]: For 108488/109288 co-relation queries the response was YES. [2023-08-30 15:19:35,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79509 conditions, 12852 events. 7134/12852 cut-off events. For 108488/109288 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 101219 event pairs, 1691 based on Foata normal form. 1097/13395 useless extension candidates. Maximal degree in co-relation 79471. Up to 3858 conditions per place. [2023-08-30 15:19:35,655 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 759 selfloop transitions, 145 changer transitions 8/913 dead transitions. [2023-08-30 15:19:35,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 913 transitions, 12664 flow [2023-08-30 15:19:35,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-30 15:19:35,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-30 15:19:35,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3710 transitions. [2023-08-30 15:19:35,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33999266862170086 [2023-08-30 15:19:35,659 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3710 transitions. [2023-08-30 15:19:35,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3710 transitions. [2023-08-30 15:19:35,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:19:35,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3710 transitions. [2023-08-30 15:19:35,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 84.31818181818181) internal successors, (3710), 44 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:35,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 248.0) internal successors, (11160), 45 states have internal predecessors, (11160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:35,667 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 248.0) internal successors, (11160), 45 states have internal predecessors, (11160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:35,667 INFO L175 Difference]: Start difference. First operand has 180 places, 104 transitions, 1542 flow. Second operand 44 states and 3710 transitions. [2023-08-30 15:19:35,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 913 transitions, 12664 flow [2023-08-30 15:19:36,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 913 transitions, 11182 flow, removed 272 selfloop flow, removed 33 redundant places. [2023-08-30 15:19:36,095 INFO L231 Difference]: Finished difference. Result has 171 places, 213 transitions, 2970 flow [2023-08-30 15:19:36,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=2970, PETRI_PLACES=171, PETRI_TRANSITIONS=213} [2023-08-30 15:19:36,096 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 132 predicate places. [2023-08-30 15:19:36,096 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 213 transitions, 2970 flow [2023-08-30 15:19:36,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 75.37142857142857) internal successors, (2638), 35 states have internal predecessors, (2638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:36,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:19:36,097 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:19:36,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 15:19:36,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-30 15:19:36,297 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:19:36,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:19:36,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1016633806, now seen corresponding path program 3 times [2023-08-30 15:19:36,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:19:36,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485075292] [2023-08-30 15:19:36,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:36,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:19:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:36,643 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 15:19:36,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:19:36,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485075292] [2023-08-30 15:19:36,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485075292] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:19:36,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550755952] [2023-08-30 15:19:36,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:19:36,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:36,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:19:36,645 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 15:19:36,646 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 15:19:36,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 15:19:36,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:19:36,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 15:19:36,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:19:36,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 15:19:37,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:37,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 15:19:37,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:37,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 15:19:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:37,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:19:37,464 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_thread2Thread1of1ForFork0_~i~1#1_104| Int) (v_ArrVal_1263 (Array Int Int))) (or (<= c_~N~0 |v_thread2Thread1of1ForFork0_~i~1#1_104|) (< |v_thread2Thread1of1ForFork0_~i~1#1_104| 3) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1263) c_~A~0.base) (+ c_~A~0.offset (* |v_thread2Thread1of1ForFork0_~i~1#1_104| 4))) 4294967296)))) is different from false [2023-08-30 15:19:37,527 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:37,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-08-30 15:19:37,541 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:37,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 159 [2023-08-30 15:19:37,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2023-08-30 15:19:37,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2023-08-30 15:19:37,863 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:37,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550755952] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:19:37,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:19:37,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-30 15:19:37,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928999952] [2023-08-30 15:19:37,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:19:37,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 15:19:37,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:19:37,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 15:19:37,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=995, Unknown=1, NotChecked=64, Total=1190 [2023-08-30 15:19:37,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 248 [2023-08-30 15:19:37,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 213 transitions, 2970 flow. Second operand has 35 states, 35 states have (on average 71.45714285714286) internal successors, (2501), 35 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:37,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:19:37,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 248 [2023-08-30 15:19:37,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:19:43,483 INFO L130 PetriNetUnfolder]: 9264/16479 cut-off events. [2023-08-30 15:19:43,483 INFO L131 PetriNetUnfolder]: For 113410/113410 co-relation queries the response was YES. [2023-08-30 15:19:43,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94132 conditions, 16479 events. 9264/16479 cut-off events. For 113410/113410 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 128239 event pairs, 791 based on Foata normal form. 620/16583 useless extension candidates. Maximal degree in co-relation 94102. Up to 5002 conditions per place. [2023-08-30 15:19:43,588 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 1159 selfloop transitions, 70 changer transitions 61/1296 dead transitions. [2023-08-30 15:19:43,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 1296 transitions, 20609 flow [2023-08-30 15:19:43,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-30 15:19:43,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-30 15:19:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3487 transitions. [2023-08-30 15:19:43,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31955645161290325 [2023-08-30 15:19:43,591 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3487 transitions. [2023-08-30 15:19:43,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3487 transitions. [2023-08-30 15:19:43,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:19:43,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3487 transitions. [2023-08-30 15:19:43,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 79.25) internal successors, (3487), 44 states have internal predecessors, (3487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:43,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 248.0) internal successors, (11160), 45 states have internal predecessors, (11160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:43,599 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 248.0) internal successors, (11160), 45 states have internal predecessors, (11160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:43,599 INFO L175 Difference]: Start difference. First operand has 171 places, 213 transitions, 2970 flow. Second operand 44 states and 3487 transitions. [2023-08-30 15:19:43,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 1296 transitions, 20609 flow [2023-08-30 15:19:43,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 1296 transitions, 19444 flow, removed 31 selfloop flow, removed 14 redundant places. [2023-08-30 15:19:43,708 INFO L231 Difference]: Finished difference. Result has 206 places, 264 transitions, 3444 flow [2023-08-30 15:19:43,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2753, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=3444, PETRI_PLACES=206, PETRI_TRANSITIONS=264} [2023-08-30 15:19:43,708 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 167 predicate places. [2023-08-30 15:19:43,708 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 264 transitions, 3444 flow [2023-08-30 15:19:43,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 71.45714285714286) internal successors, (2501), 35 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:43,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:19:43,709 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2023-08-30 15:19:43,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-30 15:19:43,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-30 15:19:43,916 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:19:43,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:19:43,916 INFO L85 PathProgramCache]: Analyzing trace with hash 705192089, now seen corresponding path program 5 times [2023-08-30 15:19:43,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:19:43,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969579383] [2023-08-30 15:19:43,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:43,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:19:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:44,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:19:44,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969579383] [2023-08-30 15:19:44,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969579383] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:19:44,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170767394] [2023-08-30 15:19:44,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:19:44,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:44,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:19:44,065 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:19:44,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 15:19:44,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-30 15:19:44,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:19:44,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 15:19:44,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:19:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:44,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:19:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:44,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170767394] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:19:44,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:19:44,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-30 15:19:44,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143938500] [2023-08-30 15:19:44,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:19:44,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 15:19:44,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:19:44,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 15:19:44,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-08-30 15:19:44,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 15:19:44,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 264 transitions, 3444 flow. Second operand has 29 states, 29 states have (on average 97.44827586206897) internal successors, (2826), 29 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:44,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:19:44,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 15:19:44,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:19:46,769 INFO L130 PetriNetUnfolder]: 8600/15301 cut-off events. [2023-08-30 15:19:46,769 INFO L131 PetriNetUnfolder]: For 134716/135439 co-relation queries the response was YES. [2023-08-30 15:19:46,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94382 conditions, 15301 events. 8600/15301 cut-off events. For 134716/135439 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 118871 event pairs, 3515 based on Foata normal form. 843/16116 useless extension candidates. Maximal degree in co-relation 94348. Up to 7122 conditions per place. [2023-08-30 15:19:46,889 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 410 selfloop transitions, 59 changer transitions 60/532 dead transitions. [2023-08-30 15:19:46,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 532 transitions, 7298 flow [2023-08-30 15:19:46,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 15:19:46,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 15:19:46,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1875 transitions. [2023-08-30 15:19:46,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4200268817204301 [2023-08-30 15:19:46,891 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1875 transitions. [2023-08-30 15:19:46,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1875 transitions. [2023-08-30 15:19:46,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:19:46,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1875 transitions. [2023-08-30 15:19:46,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 104.16666666666667) internal successors, (1875), 18 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:46,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 248.0) internal successors, (4712), 19 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:46,896 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 248.0) internal successors, (4712), 19 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:46,896 INFO L175 Difference]: Start difference. First operand has 206 places, 264 transitions, 3444 flow. Second operand 18 states and 1875 transitions. [2023-08-30 15:19:46,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 532 transitions, 7298 flow [2023-08-30 15:19:47,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 532 transitions, 6683 flow, removed 16 selfloop flow, removed 17 redundant places. [2023-08-30 15:19:47,031 INFO L231 Difference]: Finished difference. Result has 206 places, 250 transitions, 3161 flow [2023-08-30 15:19:47,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=3078, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3161, PETRI_PLACES=206, PETRI_TRANSITIONS=250} [2023-08-30 15:19:47,032 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 167 predicate places. [2023-08-30 15:19:47,032 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 250 transitions, 3161 flow [2023-08-30 15:19:47,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 97.44827586206897) internal successors, (2826), 29 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:47,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:19:47,032 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:19:47,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 15:19:47,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:47,233 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:19:47,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:19:47,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1016633807, now seen corresponding path program 5 times [2023-08-30 15:19:47,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:19:47,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695083743] [2023-08-30 15:19:47,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:47,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:19:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:47,605 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 15:19:47,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:19:47,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695083743] [2023-08-30 15:19:47,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695083743] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:19:47,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258575834] [2023-08-30 15:19:47,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:19:47,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:47,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:19:47,613 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:19:47,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 15:19:47,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 15:19:47,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:19:47,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 15:19:47,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:19:47,876 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 15:19:47,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:47,906 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 15:19:47,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:47,935 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 15:19:48,011 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 15:19:48,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:19:48,164 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:48,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 15:19:48,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:48,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 65 [2023-08-30 15:19:48,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-08-30 15:19:48,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-08-30 15:19:48,289 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 15:19:48,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258575834] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:19:48,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:19:48,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-30 15:19:48,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046041353] [2023-08-30 15:19:48,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:19:48,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 15:19:48,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:19:48,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 15:19:48,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=944, Unknown=8, NotChecked=0, Total=1056 [2023-08-30 15:19:48,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 15:19:48,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 250 transitions, 3161 flow. Second operand has 33 states, 33 states have (on average 80.45454545454545) internal successors, (2655), 33 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:48,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:19:48,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 15:19:48,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:19:51,249 INFO L130 PetriNetUnfolder]: 7304/13246 cut-off events. [2023-08-30 15:19:51,249 INFO L131 PetriNetUnfolder]: For 96649/96918 co-relation queries the response was YES. [2023-08-30 15:19:51,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76871 conditions, 13246 events. 7304/13246 cut-off events. For 96649/96918 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 102376 event pairs, 1327 based on Foata normal form. 1227/13737 useless extension candidates. Maximal degree in co-relation 76839. Up to 4028 conditions per place. [2023-08-30 15:19:51,339 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 795 selfloop transitions, 60 changer transitions 0/861 dead transitions. [2023-08-30 15:19:51,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 861 transitions, 13845 flow [2023-08-30 15:19:51,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 15:19:51,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 15:19:51,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1476 transitions. [2023-08-30 15:19:51,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35009487666034156 [2023-08-30 15:19:51,342 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1476 transitions. [2023-08-30 15:19:51,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1476 transitions. [2023-08-30 15:19:51,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:19:51,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1476 transitions. [2023-08-30 15:19:51,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 86.82352941176471) internal successors, (1476), 17 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:51,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 248.0) internal successors, (4464), 18 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:51,346 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 248.0) internal successors, (4464), 18 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:51,346 INFO L175 Difference]: Start difference. First operand has 206 places, 250 transitions, 3161 flow. Second operand 17 states and 1476 transitions. [2023-08-30 15:19:51,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 861 transitions, 13845 flow [2023-08-30 15:19:51,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 861 transitions, 13666 flow, removed 10 selfloop flow, removed 9 redundant places. [2023-08-30 15:19:51,474 INFO L231 Difference]: Finished difference. Result has 213 places, 252 transitions, 3303 flow [2023-08-30 15:19:51,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=3097, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3303, PETRI_PLACES=213, PETRI_TRANSITIONS=252} [2023-08-30 15:19:51,475 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 174 predicate places. [2023-08-30 15:19:51,475 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 252 transitions, 3303 flow [2023-08-30 15:19:51,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 80.45454545454545) internal successors, (2655), 33 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:51,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:19:51,476 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1] [2023-08-30 15:19:51,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-30 15:19:51,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-08-30 15:19:51,680 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:19:51,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:19:51,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1111908101, now seen corresponding path program 6 times [2023-08-30 15:19:51,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:19:51,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621393682] [2023-08-30 15:19:51,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:51,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:19:51,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:52,058 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:52,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:19:52,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621393682] [2023-08-30 15:19:52,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621393682] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:19:52,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109626890] [2023-08-30 15:19:52,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:19:52,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:52,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:19:52,060 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:19:52,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 15:19:52,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-30 15:19:52,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:19:52,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 15:19:52,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:19:52,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 15:19:52,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:52,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 15:19:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:52,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:19:52,953 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:52,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-08-30 15:19:52,962 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:52,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 33 [2023-08-30 15:19:52,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-08-30 15:19:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:53,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109626890] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:19:53,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:19:53,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-30 15:19:53,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32305645] [2023-08-30 15:19:53,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:19:53,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-30 15:19:53,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:19:53,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-30 15:19:53,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2023-08-30 15:19:58,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:19:59,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 248 [2023-08-30 15:19:59,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 252 transitions, 3303 flow. Second operand has 38 states, 38 states have (on average 87.42105263157895) internal successors, (3322), 38 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:59,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:19:59,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 248 [2023-08-30 15:19:59,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:20:00,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:20:03,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:20:08,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:20:14,466 INFO L130 PetriNetUnfolder]: 9110/15945 cut-off events. [2023-08-30 15:20:14,467 INFO L131 PetriNetUnfolder]: For 136606/137398 co-relation queries the response was YES. [2023-08-30 15:20:14,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101355 conditions, 15945 events. 9110/15945 cut-off events. For 136606/137398 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 122768 event pairs, 2108 based on Foata normal form. 864/16484 useless extension candidates. Maximal degree in co-relation 101320. Up to 4888 conditions per place. [2023-08-30 15:20:14,582 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 674 selfloop transitions, 254 changer transitions 15/946 dead transitions. [2023-08-30 15:20:14,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 946 transitions, 13351 flow [2023-08-30 15:20:14,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-08-30 15:20:14,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2023-08-30 15:20:14,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 8065 transitions. [2023-08-30 15:20:14,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3653950706777818 [2023-08-30 15:20:14,590 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 8065 transitions. [2023-08-30 15:20:14,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 8065 transitions. [2023-08-30 15:20:14,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:20:14,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 8065 transitions. [2023-08-30 15:20:14,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 90.61797752808988) internal successors, (8065), 89 states have internal predecessors, (8065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:14,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 248.0) internal successors, (22320), 90 states have internal predecessors, (22320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:14,614 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 248.0) internal successors, (22320), 90 states have internal predecessors, (22320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:14,614 INFO L175 Difference]: Start difference. First operand has 213 places, 252 transitions, 3303 flow. Second operand 89 states and 8065 transitions. [2023-08-30 15:20:14,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 946 transitions, 13351 flow [2023-08-30 15:20:14,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 946 transitions, 12740 flow, removed 23 selfloop flow, removed 12 redundant places. [2023-08-30 15:20:14,888 INFO L231 Difference]: Finished difference. Result has 299 places, 368 transitions, 5235 flow [2023-08-30 15:20:14,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=3193, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=5235, PETRI_PLACES=299, PETRI_TRANSITIONS=368} [2023-08-30 15:20:14,888 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 260 predicate places. [2023-08-30 15:20:14,888 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 368 transitions, 5235 flow [2023-08-30 15:20:14,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 87.42105263157895) internal successors, (3322), 38 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:14,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:20:14,889 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:20:14,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-30 15:20:15,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:15,093 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:20:15,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:20:15,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2027486215, now seen corresponding path program 6 times [2023-08-30 15:20:15,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:20:15,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249465808] [2023-08-30 15:20:15,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:20:15,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:20:15,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:20:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:15,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:20:15,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249465808] [2023-08-30 15:20:15,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249465808] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:20:15,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72698229] [2023-08-30 15:20:15,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:20:15,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:15,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:20:15,218 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:20:15,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-30 15:20:15,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-30 15:20:15,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:20:15,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 15:20:15,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:20:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:15,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:20:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:15,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72698229] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:20:15,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:20:15,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-30 15:20:15,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398146476] [2023-08-30 15:20:15,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:20:15,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 15:20:15,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:20:15,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 15:20:15,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2023-08-30 15:20:15,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 15:20:15,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 368 transitions, 5235 flow. Second operand has 29 states, 29 states have (on average 97.51724137931035) internal successors, (2828), 29 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:15,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:20:15,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 15:20:15,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:20:18,574 INFO L130 PetriNetUnfolder]: 8750/15432 cut-off events. [2023-08-30 15:20:18,574 INFO L131 PetriNetUnfolder]: For 146095/146115 co-relation queries the response was YES. [2023-08-30 15:20:18,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99692 conditions, 15432 events. 8750/15432 cut-off events. For 146095/146115 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 115723 event pairs, 3713 based on Foata normal form. 260/15092 useless extension candidates. Maximal degree in co-relation 99647. Up to 9671 conditions per place. [2023-08-30 15:20:18,686 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 333 selfloop transitions, 16 changer transitions 267/621 dead transitions. [2023-08-30 15:20:18,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 621 transitions, 10348 flow [2023-08-30 15:20:18,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 15:20:18,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 15:20:18,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1434 transitions. [2023-08-30 15:20:18,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4130184331797235 [2023-08-30 15:20:18,688 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1434 transitions. [2023-08-30 15:20:18,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1434 transitions. [2023-08-30 15:20:18,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:20:18,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1434 transitions. [2023-08-30 15:20:18,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 102.42857142857143) internal successors, (1434), 14 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:18,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:18,713 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:18,713 INFO L175 Difference]: Start difference. First operand has 299 places, 368 transitions, 5235 flow. Second operand 14 states and 1434 transitions. [2023-08-30 15:20:18,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 621 transitions, 10348 flow [2023-08-30 15:20:19,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 621 transitions, 10032 flow, removed 60 selfloop flow, removed 17 redundant places. [2023-08-30 15:20:19,088 INFO L231 Difference]: Finished difference. Result has 295 places, 278 transitions, 3785 flow [2023-08-30 15:20:19,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=4924, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3785, PETRI_PLACES=295, PETRI_TRANSITIONS=278} [2023-08-30 15:20:19,088 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 256 predicate places. [2023-08-30 15:20:19,088 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 278 transitions, 3785 flow [2023-08-30 15:20:19,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 97.51724137931035) internal successors, (2828), 29 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:19,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:20:19,089 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1] [2023-08-30 15:20:19,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-30 15:20:19,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-30 15:20:19,289 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:20:19,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:20:19,290 INFO L85 PathProgramCache]: Analyzing trace with hash 835202584, now seen corresponding path program 5 times [2023-08-30 15:20:19,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:20:19,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641577473] [2023-08-30 15:20:19,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:20:19,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:20:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:20:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:19,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:20:19,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641577473] [2023-08-30 15:20:19,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641577473] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:20:19,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117224374] [2023-08-30 15:20:19,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:20:19,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:19,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:20:19,796 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:20:19,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-30 15:20:19,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-30 15:20:19,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:20:19,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-30 15:20:19,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:20:20,077 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 15:20:20,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:20,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 15:20:20,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:20,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:20:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:20,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:20:20,404 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1485 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1485) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 16 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2023-08-30 15:20:20,473 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 15:20:20,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 39 [2023-08-30 15:20:20,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:20:20,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2023-08-30 15:20:20,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-08-30 15:20:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-08-30 15:20:20,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117224374] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:20:20,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:20:20,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-08-30 15:20:20,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459733337] [2023-08-30 15:20:20,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:20:20,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 15:20:20,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:20:20,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 15:20:20,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1289, Unknown=11, NotChecked=72, Total=1482 [2023-08-30 15:20:20,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 248 [2023-08-30 15:20:20,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 278 transitions, 3785 flow. Second operand has 39 states, 39 states have (on average 83.38461538461539) internal successors, (3252), 39 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:20,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:20:20,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 248 [2023-08-30 15:20:20,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:20:23,498 INFO L130 PetriNetUnfolder]: 7198/12584 cut-off events. [2023-08-30 15:20:23,498 INFO L131 PetriNetUnfolder]: For 117501/118089 co-relation queries the response was YES. [2023-08-30 15:20:23,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83461 conditions, 12584 events. 7198/12584 cut-off events. For 117501/118089 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 92391 event pairs, 3096 based on Foata normal form. 595/13121 useless extension candidates. Maximal degree in co-relation 83416. Up to 8719 conditions per place. [2023-08-30 15:20:23,579 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 230 selfloop transitions, 152 changer transitions 0/384 dead transitions. [2023-08-30 15:20:23,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 384 transitions, 5848 flow [2023-08-30 15:20:23,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 15:20:23,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 15:20:23,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1891 transitions. [2023-08-30 15:20:23,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3465909090909091 [2023-08-30 15:20:23,583 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1891 transitions. [2023-08-30 15:20:23,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1891 transitions. [2023-08-30 15:20:23,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:20:23,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1891 transitions. [2023-08-30 15:20:23,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 85.95454545454545) internal successors, (1891), 22 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:23,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 248.0) internal successors, (5704), 23 states have internal predecessors, (5704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:23,598 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 248.0) internal successors, (5704), 23 states have internal predecessors, (5704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:23,598 INFO L175 Difference]: Start difference. First operand has 295 places, 278 transitions, 3785 flow. Second operand 22 states and 1891 transitions. [2023-08-30 15:20:23,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 384 transitions, 5848 flow [2023-08-30 15:20:24,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 384 transitions, 5743 flow, removed 14 selfloop flow, removed 9 redundant places. [2023-08-30 15:20:24,247 INFO L231 Difference]: Finished difference. Result has 254 places, 280 transitions, 4104 flow [2023-08-30 15:20:24,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=3698, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4104, PETRI_PLACES=254, PETRI_TRANSITIONS=280} [2023-08-30 15:20:24,248 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 215 predicate places. [2023-08-30 15:20:24,248 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 280 transitions, 4104 flow [2023-08-30 15:20:24,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 83.38461538461539) internal successors, (3252), 39 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:24,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:20:24,248 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 15:20:24,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-08-30 15:20:24,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:24,449 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:20:24,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:20:24,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1759135305, now seen corresponding path program 5 times [2023-08-30 15:20:24,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:20:24,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54417366] [2023-08-30 15:20:24,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:20:24,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:20:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:20:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:24,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:20:24,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54417366] [2023-08-30 15:20:24,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54417366] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:20:24,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299466897] [2023-08-30 15:20:24,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:20:24,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:24,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:20:24,859 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:20:24,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-30 15:20:25,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-30 15:20:25,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:20:25,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 15:20:25,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:20:25,172 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 15:20:25,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:25,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 15:20:25,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:25,291 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 15:20:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:25,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:20:25,562 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1535 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1535) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset 16)) 4294967296)) is different from false [2023-08-30 15:20:25,569 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1535 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1535) c_~A~0.base) (+ c_~A~0.offset 16)) 4294967296)) is different from false [2023-08-30 15:20:25,704 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:20:25,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 15:20:25,711 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:20:25,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 129 [2023-08-30 15:20:25,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 15:20:25,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-30 15:20:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-08-30 15:20:25,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299466897] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:20:25,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:20:25,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-30 15:20:25,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121330451] [2023-08-30 15:20:25,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:20:25,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-30 15:20:25,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:20:25,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-30 15:20:25,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1293, Unknown=4, NotChecked=146, Total=1560 [2023-08-30 15:20:25,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 15:20:25,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 280 transitions, 4104 flow. Second operand has 40 states, 40 states have (on average 80.425) internal successors, (3217), 40 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:25,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:20:25,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 15:20:25,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:20:29,503 INFO L130 PetriNetUnfolder]: 8429/14747 cut-off events. [2023-08-30 15:20:29,504 INFO L131 PetriNetUnfolder]: For 152618/153389 co-relation queries the response was YES. [2023-08-30 15:20:29,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100180 conditions, 14747 events. 8429/14747 cut-off events. For 152618/153389 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 110793 event pairs, 2531 based on Foata normal form. 1538/15209 useless extension candidates. Maximal degree in co-relation 100136. Up to 4442 conditions per place. [2023-08-30 15:20:29,620 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 644 selfloop transitions, 128 changer transitions 0/774 dead transitions. [2023-08-30 15:20:29,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 774 transitions, 11242 flow [2023-08-30 15:20:29,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 15:20:29,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 15:20:29,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1748 transitions. [2023-08-30 15:20:29,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3524193548387097 [2023-08-30 15:20:29,623 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1748 transitions. [2023-08-30 15:20:29,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1748 transitions. [2023-08-30 15:20:29,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:20:29,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1748 transitions. [2023-08-30 15:20:29,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 87.4) internal successors, (1748), 20 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:29,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:29,628 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:29,628 INFO L175 Difference]: Start difference. First operand has 254 places, 280 transitions, 4104 flow. Second operand 20 states and 1748 transitions. [2023-08-30 15:20:29,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 774 transitions, 11242 flow [2023-08-30 15:20:29,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 774 transitions, 10867 flow, removed 1 selfloop flow, removed 18 redundant places. [2023-08-30 15:20:29,995 INFO L231 Difference]: Finished difference. Result has 257 places, 294 transitions, 4383 flow [2023-08-30 15:20:29,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=3747, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4383, PETRI_PLACES=257, PETRI_TRANSITIONS=294} [2023-08-30 15:20:29,995 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 218 predicate places. [2023-08-30 15:20:29,996 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 294 transitions, 4383 flow [2023-08-30 15:20:29,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 80.425) internal successors, (3217), 40 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:29,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:20:29,996 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:20:30,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-30 15:20:30,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-30 15:20:30,203 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:20:30,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:20:30,204 INFO L85 PathProgramCache]: Analyzing trace with hash -2015422619, now seen corresponding path program 7 times [2023-08-30 15:20:30,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:20:30,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029597054] [2023-08-30 15:20:30,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:20:30,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:20:30,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:20:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:30,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:20:30,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029597054] [2023-08-30 15:20:30,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029597054] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:20:30,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168968801] [2023-08-30 15:20:30,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 15:20:30,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:30,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:20:30,690 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:20:30,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-30 15:20:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:20:30,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 15:20:30,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:20:30,983 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 15:20:31,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:31,013 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 15:20:31,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:31,041 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 15:20:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:31,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:20:31,274 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1585 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1585) c_~A~0.base) (+ c_~A~0.offset 16)) 9223372039002259456)) is different from false [2023-08-30 15:20:31,280 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1585 (Array Int Int)) (v_ArrVal_1584 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1584) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1585) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 16 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456)) is different from false [2023-08-30 15:20:31,285 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:20:31,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 15:20:31,290 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:20:31,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 65 [2023-08-30 15:20:31,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-08-30 15:20:31,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-08-30 15:20:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-08-30 15:20:31,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168968801] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:20:31,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:20:31,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-08-30 15:20:31,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984507084] [2023-08-30 15:20:31,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:20:31,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 15:20:31,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:20:31,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 15:20:31,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1218, Unknown=2, NotChecked=142, Total=1482 [2023-08-30 15:20:31,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 15:20:31,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 294 transitions, 4383 flow. Second operand has 39 states, 39 states have (on average 80.46153846153847) internal successors, (3138), 39 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:31,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:20:31,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 15:20:31,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:20:35,417 INFO L130 PetriNetUnfolder]: 10250/17927 cut-off events. [2023-08-30 15:20:35,417 INFO L131 PetriNetUnfolder]: For 205177/205265 co-relation queries the response was YES. [2023-08-30 15:20:35,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124449 conditions, 17927 events. 10250/17927 cut-off events. For 205177/205265 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 135751 event pairs, 1794 based on Foata normal form. 788/17665 useless extension candidates. Maximal degree in co-relation 124403. Up to 5255 conditions per place. [2023-08-30 15:20:35,542 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 1139 selfloop transitions, 49 changer transitions 0/1193 dead transitions. [2023-08-30 15:20:35,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 1193 transitions, 23896 flow [2023-08-30 15:20:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 15:20:35,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 15:20:35,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1738 transitions. [2023-08-30 15:20:35,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3504032258064516 [2023-08-30 15:20:35,543 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1738 transitions. [2023-08-30 15:20:35,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1738 transitions. [2023-08-30 15:20:35,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:20:35,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1738 transitions. [2023-08-30 15:20:35,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 86.9) internal successors, (1738), 20 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:35,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:35,548 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:35,548 INFO L175 Difference]: Start difference. First operand has 257 places, 294 transitions, 4383 flow. Second operand 20 states and 1738 transitions. [2023-08-30 15:20:35,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 1193 transitions, 23896 flow [2023-08-30 15:20:36,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 1193 transitions, 21773 flow, removed 36 selfloop flow, removed 18 redundant places. [2023-08-30 15:20:36,013 INFO L231 Difference]: Finished difference. Result has 260 places, 301 transitions, 4249 flow [2023-08-30 15:20:36,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=4009, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4249, PETRI_PLACES=260, PETRI_TRANSITIONS=301} [2023-08-30 15:20:36,014 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 221 predicate places. [2023-08-30 15:20:36,014 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 301 transitions, 4249 flow [2023-08-30 15:20:36,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 80.46153846153847) internal successors, (3138), 39 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:36,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:20:36,015 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 15:20:36,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-08-30 15:20:36,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-30 15:20:36,215 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:20:36,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:20:36,216 INFO L85 PathProgramCache]: Analyzing trace with hash -351339876, now seen corresponding path program 4 times [2023-08-30 15:20:36,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:20:36,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565342847] [2023-08-30 15:20:36,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:20:36,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:20:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:20:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:36,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:20:36,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565342847] [2023-08-30 15:20:36,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565342847] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:20:36,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430977903] [2023-08-30 15:20:36,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:20:36,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:36,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:20:36,690 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:20:36,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-30 15:20:36,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:20:36,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:20:36,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-30 15:20:36,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:20:37,065 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 15:20:37,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:37,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 15:20:37,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:37,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:20:37,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:37,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:20:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:37,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:20:37,459 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1641 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1641) c_~A~0.base) (+ c_~A~0.offset 16)) 9223372039002259456))) is different from false [2023-08-30 15:20:37,574 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 15:20:37,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 42 [2023-08-30 15:20:37,580 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:20:37,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 147 [2023-08-30 15:20:37,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2023-08-30 15:20:37,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-08-30 15:20:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:37,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430977903] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:20:37,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:20:37,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 41 [2023-08-30 15:20:37,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987158131] [2023-08-30 15:20:37,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:20:37,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-30 15:20:37,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:20:37,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-30 15:20:37,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1577, Unknown=16, NotChecked=80, Total=1806 [2023-08-30 15:20:37,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 15:20:37,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 301 transitions, 4249 flow. Second operand has 43 states, 43 states have (on average 80.37209302325581) internal successors, (3456), 43 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:37,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:20:37,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 15:20:37,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:20:41,835 INFO L130 PetriNetUnfolder]: 9933/17376 cut-off events. [2023-08-30 15:20:41,835 INFO L131 PetriNetUnfolder]: For 173719/174739 co-relation queries the response was YES. [2023-08-30 15:20:41,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122544 conditions, 17376 events. 9933/17376 cut-off events. For 173719/174739 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 131881 event pairs, 2889 based on Foata normal form. 1107/18109 useless extension candidates. Maximal degree in co-relation 122498. Up to 5163 conditions per place. [2023-08-30 15:20:41,962 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 742 selfloop transitions, 128 changer transitions 0/872 dead transitions. [2023-08-30 15:20:41,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 872 transitions, 13554 flow [2023-08-30 15:20:41,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 15:20:41,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 15:20:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1745 transitions. [2023-08-30 15:20:41,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35181451612903225 [2023-08-30 15:20:41,963 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1745 transitions. [2023-08-30 15:20:41,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1745 transitions. [2023-08-30 15:20:41,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:20:41,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1745 transitions. [2023-08-30 15:20:41,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 87.25) internal successors, (1745), 20 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:41,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:41,967 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:41,968 INFO L175 Difference]: Start difference. First operand has 260 places, 301 transitions, 4249 flow. Second operand 20 states and 1745 transitions. [2023-08-30 15:20:41,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 872 transitions, 13554 flow [2023-08-30 15:20:42,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 872 transitions, 12403 flow, removed 24 selfloop flow, removed 17 redundant places. [2023-08-30 15:20:42,404 INFO L231 Difference]: Finished difference. Result has 262 places, 300 transitions, 4354 flow [2023-08-30 15:20:42,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=4098, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4354, PETRI_PLACES=262, PETRI_TRANSITIONS=300} [2023-08-30 15:20:42,405 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 223 predicate places. [2023-08-30 15:20:42,405 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 300 transitions, 4354 flow [2023-08-30 15:20:42,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 80.37209302325581) internal successors, (3456), 43 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:42,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:20:42,405 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 15:20:42,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-30 15:20:42,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-30 15:20:42,606 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:20:42,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:20:42,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1201797125, now seen corresponding path program 6 times [2023-08-30 15:20:42,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:20:42,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786350533] [2023-08-30 15:20:42,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:20:42,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:20:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:20:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:42,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:20:42,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786350533] [2023-08-30 15:20:42,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786350533] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:20:42,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226958815] [2023-08-30 15:20:42,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:20:42,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:42,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:20:42,783 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:20:42,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-30 15:20:43,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-08-30 15:20:43,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:20:43,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 15:20:43,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:20:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:43,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:20:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:43,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226958815] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:20:43,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:20:43,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2023-08-30 15:20:43,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347131109] [2023-08-30 15:20:43,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:20:43,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 15:20:43,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:20:43,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 15:20:43,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=841, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 15:20:43,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 15:20:43,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 300 transitions, 4354 flow. Second operand has 34 states, 34 states have (on average 97.47058823529412) internal successors, (3314), 34 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:43,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:20:43,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 15:20:43,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:20:46,406 INFO L130 PetriNetUnfolder]: 8609/15257 cut-off events. [2023-08-30 15:20:46,406 INFO L131 PetriNetUnfolder]: For 153788/154788 co-relation queries the response was YES. [2023-08-30 15:20:46,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102614 conditions, 15257 events. 8609/15257 cut-off events. For 153788/154788 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 115818 event pairs, 3102 based on Foata normal form. 1324/15653 useless extension candidates. Maximal degree in co-relation 102569. Up to 4659 conditions per place. [2023-08-30 15:20:46,514 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 494 selfloop transitions, 75 changer transitions 65/636 dead transitions. [2023-08-30 15:20:46,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 636 transitions, 9137 flow [2023-08-30 15:20:46,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 15:20:46,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 15:20:46,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2197 transitions. [2023-08-30 15:20:46,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42185099846390167 [2023-08-30 15:20:46,516 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2197 transitions. [2023-08-30 15:20:46,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2197 transitions. [2023-08-30 15:20:46,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:20:46,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2197 transitions. [2023-08-30 15:20:46,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 104.61904761904762) internal successors, (2197), 21 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:46,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 248.0) internal successors, (5456), 22 states have internal predecessors, (5456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:46,520 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 248.0) internal successors, (5456), 22 states have internal predecessors, (5456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:46,520 INFO L175 Difference]: Start difference. First operand has 262 places, 300 transitions, 4354 flow. Second operand 21 states and 2197 transitions. [2023-08-30 15:20:46,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 636 transitions, 9137 flow [2023-08-30 15:20:46,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 636 transitions, 8806 flow, removed 9 selfloop flow, removed 19 redundant places. [2023-08-30 15:20:46,933 INFO L231 Difference]: Finished difference. Result has 262 places, 281 transitions, 3828 flow [2023-08-30 15:20:46,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=3660, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3828, PETRI_PLACES=262, PETRI_TRANSITIONS=281} [2023-08-30 15:20:46,933 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 223 predicate places. [2023-08-30 15:20:46,934 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 281 transitions, 3828 flow [2023-08-30 15:20:46,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 97.47058823529412) internal successors, (3314), 34 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:46,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:20:46,934 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1] [2023-08-30 15:20:46,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-08-30 15:20:47,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-30 15:20:47,141 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:20:47,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:20:47,141 INFO L85 PathProgramCache]: Analyzing trace with hash -529181690, now seen corresponding path program 6 times [2023-08-30 15:20:47,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:20:47,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974071532] [2023-08-30 15:20:47,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:20:47,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:20:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:20:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:47,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:20:47,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974071532] [2023-08-30 15:20:47,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974071532] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:20:47,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206158696] [2023-08-30 15:20:47,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:20:47,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:47,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:20:47,724 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:20:47,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-30 15:20:48,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-08-30 15:20:48,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:20:48,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 15:20:48,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:20:48,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 15:20:48,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:48,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 15:20:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:48,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:20:48,926 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:20:48,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 15:20:48,934 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:20:48,934 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 49 treesize of output 42 [2023-08-30 15:20:48,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 9 [2023-08-30 15:20:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:49,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206158696] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:20:49,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:20:49,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-08-30 15:20:49,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587995370] [2023-08-30 15:20:49,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:20:49,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 15:20:49,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:20:49,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 15:20:49,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2023-08-30 15:20:53,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 248 [2023-08-30 15:20:53,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 281 transitions, 3828 flow. Second operand has 44 states, 44 states have (on average 87.43181818181819) internal successors, (3847), 44 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:53,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:20:53,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 248 [2023-08-30 15:20:53,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:20:54,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:21:06,853 INFO L130 PetriNetUnfolder]: 10723/18647 cut-off events. [2023-08-30 15:21:06,854 INFO L131 PetriNetUnfolder]: For 173314/174694 co-relation queries the response was YES. [2023-08-30 15:21:06,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126954 conditions, 18647 events. 10723/18647 cut-off events. For 173314/174694 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 142528 event pairs, 2580 based on Foata normal form. 1473/19218 useless extension candidates. Maximal degree in co-relation 126910. Up to 5647 conditions per place. [2023-08-30 15:21:06,981 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 882 selfloop transitions, 280 changer transitions 5/1169 dead transitions. [2023-08-30 15:21:06,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1169 transitions, 16857 flow [2023-08-30 15:21:06,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-08-30 15:21:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2023-08-30 15:21:06,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 9807 transitions. [2023-08-30 15:21:06,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3661514336917563 [2023-08-30 15:21:06,987 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 9807 transitions. [2023-08-30 15:21:06,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 9807 transitions. [2023-08-30 15:21:06,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:21:06,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 9807 transitions. [2023-08-30 15:21:06,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 90.80555555555556) internal successors, (9807), 108 states have internal predecessors, (9807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:07,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 248.0) internal successors, (27032), 109 states have internal predecessors, (27032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:07,006 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 248.0) internal successors, (27032), 109 states have internal predecessors, (27032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:07,006 INFO L175 Difference]: Start difference. First operand has 262 places, 281 transitions, 3828 flow. Second operand 108 states and 9807 transitions. [2023-08-30 15:21:07,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1169 transitions, 16857 flow [2023-08-30 15:21:07,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1169 transitions, 16668 flow, removed 5 selfloop flow, removed 13 redundant places. [2023-08-30 15:21:07,630 INFO L231 Difference]: Finished difference. Result has 370 places, 375 transitions, 5877 flow [2023-08-30 15:21:07,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=3710, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=5877, PETRI_PLACES=370, PETRI_TRANSITIONS=375} [2023-08-30 15:21:07,631 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 331 predicate places. [2023-08-30 15:21:07,631 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 375 transitions, 5877 flow [2023-08-30 15:21:07,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 87.43181818181819) internal successors, (3847), 44 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:07,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:21:07,632 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:21:07,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-30 15:21:07,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-30 15:21:07,839 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:21:07,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:21:07,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1641451142, now seen corresponding path program 4 times [2023-08-30 15:21:07,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:21:07,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750871293] [2023-08-30 15:21:07,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:21:07,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:21:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:21:08,309 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:08,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:21:08,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750871293] [2023-08-30 15:21:08,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750871293] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:21:08,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488036431] [2023-08-30 15:21:08,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:21:08,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:21:08,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:21:08,313 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:21:08,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-30 15:21:08,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:21:08,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:21:08,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-30 15:21:08,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:21:08,627 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 15:21:08,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:21:08,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 15:21:08,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:21:08,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:21:08,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:21:08,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:21:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:08,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:21:08,963 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1792 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1792) c_~A~0.base) (+ c_~A~0.offset 16)) 4294967296))) is different from false [2023-08-30 15:21:09,075 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 15:21:09,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 42 [2023-08-30 15:21:09,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:21:09,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 75 [2023-08-30 15:21:09,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2023-08-30 15:21:09,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-08-30 15:21:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:09,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488036431] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:21:09,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:21:09,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-08-30 15:21:09,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895805211] [2023-08-30 15:21:09,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:21:09,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-30 15:21:09,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:21:09,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-30 15:21:09,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1498, Unknown=9, NotChecked=78, Total=1722 [2023-08-30 15:21:09,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 15:21:09,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 375 transitions, 5877 flow. Second operand has 42 states, 42 states have (on average 80.42857142857143) internal successors, (3378), 42 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:09,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:21:09,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 15:21:09,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:21:13,222 INFO L130 PetriNetUnfolder]: 10658/18554 cut-off events. [2023-08-30 15:21:13,222 INFO L131 PetriNetUnfolder]: For 211219/211219 co-relation queries the response was YES. [2023-08-30 15:21:13,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132648 conditions, 18554 events. 10658/18554 cut-off events. For 211219/211219 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 139106 event pairs, 1395 based on Foata normal form. 248/17897 useless extension candidates. Maximal degree in co-relation 132590. Up to 5649 conditions per place. [2023-08-30 15:21:13,372 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 1486 selfloop transitions, 51 changer transitions 0/1543 dead transitions. [2023-08-30 15:21:13,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 1543 transitions, 31733 flow [2023-08-30 15:21:13,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 15:21:13,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 15:21:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1735 transitions. [2023-08-30 15:21:13,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3497983870967742 [2023-08-30 15:21:13,374 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1735 transitions. [2023-08-30 15:21:13,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1735 transitions. [2023-08-30 15:21:13,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:21:13,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1735 transitions. [2023-08-30 15:21:13,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 86.75) internal successors, (1735), 20 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:13,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:13,377 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 248.0) internal successors, (5208), 21 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:13,377 INFO L175 Difference]: Start difference. First operand has 370 places, 375 transitions, 5877 flow. Second operand 20 states and 1735 transitions. [2023-08-30 15:21:13,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 1543 transitions, 31733 flow [2023-08-30 15:21:14,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 1543 transitions, 30193 flow, removed 223 selfloop flow, removed 58 redundant places. [2023-08-30 15:21:14,110 INFO L231 Difference]: Finished difference. Result has 331 places, 374 transitions, 5513 flow [2023-08-30 15:21:14,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=5411, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5513, PETRI_PLACES=331, PETRI_TRANSITIONS=374} [2023-08-30 15:21:14,111 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 292 predicate places. [2023-08-30 15:21:14,111 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 374 transitions, 5513 flow [2023-08-30 15:21:14,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 80.42857142857143) internal successors, (3378), 42 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:14,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:21:14,112 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 5, 5, 1, 1, 1, 1, 1] [2023-08-30 15:21:14,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-30 15:21:14,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:21:14,319 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:21:14,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:21:14,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1820967821, now seen corresponding path program 7 times [2023-08-30 15:21:14,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:21:14,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628906749] [2023-08-30 15:21:14,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:21:14,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:21:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:21:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:14,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:21:14,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628906749] [2023-08-30 15:21:14,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628906749] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:21:14,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691982990] [2023-08-30 15:21:14,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 15:21:14,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:21:14,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:21:14,927 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:21:14,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-30 15:21:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:21:15,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-30 15:21:15,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:21:15,250 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 15:21:15,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:21:15,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-08-30 15:21:15,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:21:15,307 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 15:21:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:15,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:21:15,600 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1847 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1847) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 20 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-30 15:21:15,664 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 15:21:15,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2023-08-30 15:21:15,669 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:21:15,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2023-08-30 15:21:15,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-08-30 15:21:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-08-30 15:21:15,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691982990] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:21:15,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:21:15,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-30 15:21:15,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512060447] [2023-08-30 15:21:15,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:21:15,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 15:21:15,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:21:15,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 15:21:15,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1747, Unknown=8, NotChecked=84, Total=1980 [2023-08-30 15:21:15,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 248 [2023-08-30 15:21:15,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 374 transitions, 5513 flow. Second operand has 45 states, 45 states have (on average 83.4) internal successors, (3753), 45 states have internal predecessors, (3753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:15,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:21:15,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 248 [2023-08-30 15:21:15,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:21:19,522 INFO L130 PetriNetUnfolder]: 10376/18046 cut-off events. [2023-08-30 15:21:19,522 INFO L131 PetriNetUnfolder]: For 181930/182946 co-relation queries the response was YES. [2023-08-30 15:21:19,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131887 conditions, 18046 events. 10376/18046 cut-off events. For 181930/182946 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 134738 event pairs, 4532 based on Foata normal form. 1023/18603 useless extension candidates. Maximal degree in co-relation 131831. Up to 9156 conditions per place. [2023-08-30 15:21:19,673 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 279 selfloop transitions, 201 changer transitions 0/482 dead transitions. [2023-08-30 15:21:19,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 482 transitions, 7930 flow [2023-08-30 15:21:19,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 15:21:19,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 15:21:19,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2250 transitions. [2023-08-30 15:21:19,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3489454094292804 [2023-08-30 15:21:19,675 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2250 transitions. [2023-08-30 15:21:19,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2250 transitions. [2023-08-30 15:21:19,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:21:19,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2250 transitions. [2023-08-30 15:21:19,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 86.53846153846153) internal successors, (2250), 26 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:19,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 248.0) internal successors, (6696), 27 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:19,680 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 248.0) internal successors, (6696), 27 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:19,680 INFO L175 Difference]: Start difference. First operand has 331 places, 374 transitions, 5513 flow. Second operand 26 states and 2250 transitions. [2023-08-30 15:21:19,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 482 transitions, 7930 flow [2023-08-30 15:21:20,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 482 transitions, 7736 flow, removed 7 selfloop flow, removed 18 redundant places. [2023-08-30 15:21:20,667 INFO L231 Difference]: Finished difference. Result has 340 places, 376 transitions, 5901 flow [2023-08-30 15:21:20,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=5394, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5901, PETRI_PLACES=340, PETRI_TRANSITIONS=376} [2023-08-30 15:21:20,668 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 301 predicate places. [2023-08-30 15:21:20,668 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 376 transitions, 5901 flow [2023-08-30 15:21:20,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 83.4) internal successors, (3753), 45 states have internal predecessors, (3753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:20,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:21:20,669 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:21:20,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-30 15:21:20,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-08-30 15:21:20,875 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:21:20,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:21:20,875 INFO L85 PathProgramCache]: Analyzing trace with hash 209139757, now seen corresponding path program 8 times [2023-08-30 15:21:20,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:21:20,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342299615] [2023-08-30 15:21:20,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:21:20,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:21:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:21:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:21,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:21:21,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342299615] [2023-08-30 15:21:21,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342299615] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:21:21,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509188756] [2023-08-30 15:21:21,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:21:21,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:21:21,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:21:21,020 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:21:21,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-30 15:21:21,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:21:21,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:21:21,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 15:21:21,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:21:21,381 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:21,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:21:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:21,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509188756] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:21:21,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:21:21,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2023-08-30 15:21:21,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960064491] [2023-08-30 15:21:21,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:21:21,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 15:21:21,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:21:21,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 15:21:21,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=841, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 15:21:21,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 15:21:21,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 376 transitions, 5901 flow. Second operand has 34 states, 34 states have (on average 97.5) internal successors, (3315), 34 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:21,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:21:21,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 15:21:21,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:21:24,549 INFO L130 PetriNetUnfolder]: 9659/16936 cut-off events. [2023-08-30 15:21:24,549 INFO L131 PetriNetUnfolder]: For 192615/192615 co-relation queries the response was YES. [2023-08-30 15:21:24,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121947 conditions, 16936 events. 9659/16936 cut-off events. For 192615/192615 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 124889 event pairs, 3718 based on Foata normal form. 308/16500 useless extension candidates. Maximal degree in co-relation 121890. Up to 9664 conditions per place. [2023-08-30 15:21:24,672 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 320 selfloop transitions, 12 changer transitions 373/709 dead transitions. [2023-08-30 15:21:24,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 709 transitions, 13327 flow [2023-08-30 15:21:24,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 15:21:24,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 15:21:24,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1635 transitions. [2023-08-30 15:21:24,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41204637096774194 [2023-08-30 15:21:24,674 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1635 transitions. [2023-08-30 15:21:24,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1635 transitions. [2023-08-30 15:21:24,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:21:24,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1635 transitions. [2023-08-30 15:21:24,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 102.1875) internal successors, (1635), 16 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:24,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 248.0) internal successors, (4216), 17 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:24,677 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 248.0) internal successors, (4216), 17 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:24,677 INFO L175 Difference]: Start difference. First operand has 340 places, 376 transitions, 5901 flow. Second operand 16 states and 1635 transitions. [2023-08-30 15:21:24,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 709 transitions, 13327 flow [2023-08-30 15:21:25,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 709 transitions, 12608 flow, removed 4 selfloop flow, removed 20 redundant places. [2023-08-30 15:21:25,282 INFO L231 Difference]: Finished difference. Result has 335 places, 266 transitions, 4052 flow [2023-08-30 15:21:25,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=5564, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4052, PETRI_PLACES=335, PETRI_TRANSITIONS=266} [2023-08-30 15:21:25,282 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 296 predicate places. [2023-08-30 15:21:25,282 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 266 transitions, 4052 flow [2023-08-30 15:21:25,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 97.5) internal successors, (3315), 34 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:25,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:21:25,283 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 15:21:25,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-30 15:21:25,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:21:25,489 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:21:25,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:21:25,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1664814987, now seen corresponding path program 7 times [2023-08-30 15:21:25,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:21:25,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622976085] [2023-08-30 15:21:25,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:21:25,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:21:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:21:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:25,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:21:25,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622976085] [2023-08-30 15:21:25,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622976085] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:21:25,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521185029] [2023-08-30 15:21:25,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 15:21:25,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:21:25,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:21:25,964 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:21:25,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-30 15:21:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:21:26,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 15:21:26,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:21:26,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 15:21:26,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:21:26,345 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 15:21:26,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:21:26,403 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 15:21:26,545 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:26,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:21:26,690 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1947 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1947) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset 20)) 4294967296)) is different from false [2023-08-30 15:21:26,693 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1947 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1947) c_~A~0.base) (+ c_~A~0.offset 20)) 4294967296)) is different from false [2023-08-30 15:21:26,699 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1947 (Array Int Int)) (v_ArrVal_1946 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1946) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1947) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 20 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-30 15:21:26,705 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:21:26,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-08-30 15:21:26,711 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:21:26,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 129 [2023-08-30 15:21:26,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 15:21:26,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-30 15:21:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-08-30 15:21:27,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521185029] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:21:27,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:21:27,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 44 [2023-08-30 15:21:27,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185313165] [2023-08-30 15:21:27,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:21:27,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-30 15:21:27,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:21:27,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-30 15:21:27,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1682, Unknown=3, NotChecked=252, Total=2070 [2023-08-30 15:21:27,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 15:21:27,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 266 transitions, 4052 flow. Second operand has 46 states, 46 states have (on average 80.41304347826087) internal successors, (3699), 46 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:27,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:21:27,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 15:21:27,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:21:30,979 INFO L130 PetriNetUnfolder]: 8405/14658 cut-off events. [2023-08-30 15:21:30,979 INFO L131 PetriNetUnfolder]: For 178843/179583 co-relation queries the response was YES. [2023-08-30 15:21:31,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107329 conditions, 14658 events. 8405/14658 cut-off events. For 178843/179583 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 106672 event pairs, 2600 based on Foata normal form. 1418/15766 useless extension candidates. Maximal degree in co-relation 107273. Up to 4322 conditions per place. [2023-08-30 15:21:31,099 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 546 selfloop transitions, 122 changer transitions 0/669 dead transitions. [2023-08-30 15:21:31,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 669 transitions, 10294 flow [2023-08-30 15:21:31,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 15:21:31,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 15:21:31,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2011 transitions. [2023-08-30 15:21:31,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35255960729312763 [2023-08-30 15:21:31,101 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2011 transitions. [2023-08-30 15:21:31,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2011 transitions. [2023-08-30 15:21:31,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:21:31,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2011 transitions. [2023-08-30 15:21:31,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 87.43478260869566) internal successors, (2011), 23 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:31,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 248.0) internal successors, (5952), 24 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:31,105 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 248.0) internal successors, (5952), 24 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:31,105 INFO L175 Difference]: Start difference. First operand has 335 places, 266 transitions, 4052 flow. Second operand 23 states and 2011 transitions. [2023-08-30 15:21:31,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 669 transitions, 10294 flow [2023-08-30 15:21:32,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 669 transitions, 9436 flow, removed 20 selfloop flow, removed 19 redundant places. [2023-08-30 15:21:32,151 INFO L231 Difference]: Finished difference. Result has 275 places, 277 transitions, 4198 flow [2023-08-30 15:21:32,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=3661, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4198, PETRI_PLACES=275, PETRI_TRANSITIONS=277} [2023-08-30 15:21:32,151 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 236 predicate places. [2023-08-30 15:21:32,151 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 277 transitions, 4198 flow [2023-08-30 15:21:32,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 80.41304347826087) internal successors, (3699), 46 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:32,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:21:32,152 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 15:21:32,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-30 15:21:32,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-08-30 15:21:32,352 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:21:32,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:21:32,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1664814986, now seen corresponding path program 5 times [2023-08-30 15:21:32,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:21:32,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332781837] [2023-08-30 15:21:32,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:21:32,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:21:32,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:21:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:32,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:21:32,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332781837] [2023-08-30 15:21:32,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332781837] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:21:32,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379852115] [2023-08-30 15:21:32,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:21:32,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:21:32,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:21:32,779 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:21:32,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-30 15:21:32,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-30 15:21:32,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:21:32,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 15:21:32,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:21:33,136 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 15:21:33,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:21:33,172 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 15:21:33,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:21:33,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:21:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:33,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:21:33,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:21:33,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 15:21:33,655 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:21:33,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 75 [2023-08-30 15:21:33,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-08-30 15:21:33,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 50 [2023-08-30 15:21:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:33,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379852115] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:21:33,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:21:33,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 44 [2023-08-30 15:21:33,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878079757] [2023-08-30 15:21:33,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:21:33,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-30 15:21:33,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:21:33,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-30 15:21:33,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1904, Unknown=25, NotChecked=0, Total=2070 [2023-08-30 15:21:35,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 15:21:35,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 277 transitions, 4198 flow. Second operand has 46 states, 46 states have (on average 80.41304347826087) internal successors, (3699), 46 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:35,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:21:35,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 15:21:35,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:21:38,941 INFO L130 PetriNetUnfolder]: 8157/14242 cut-off events. [2023-08-30 15:21:38,941 INFO L131 PetriNetUnfolder]: For 139597/140367 co-relation queries the response was YES. [2023-08-30 15:21:38,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101678 conditions, 14242 events. 8157/14242 cut-off events. For 139597/140367 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 103114 event pairs, 2430 based on Foata normal form. 936/14338 useless extension candidates. Maximal degree in co-relation 101625. Up to 4262 conditions per place. [2023-08-30 15:21:39,043 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 542 selfloop transitions, 125 changer transitions 0/668 dead transitions. [2023-08-30 15:21:39,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 668 transitions, 9748 flow [2023-08-30 15:21:39,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 15:21:39,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 15:21:39,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2008 transitions. [2023-08-30 15:21:39,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3520336605890603 [2023-08-30 15:21:39,045 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2008 transitions. [2023-08-30 15:21:39,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2008 transitions. [2023-08-30 15:21:39,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:21:39,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2008 transitions. [2023-08-30 15:21:39,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 87.30434782608695) internal successors, (2008), 23 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:39,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 248.0) internal successors, (5952), 24 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:39,048 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 248.0) internal successors, (5952), 24 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:39,049 INFO L175 Difference]: Start difference. First operand has 275 places, 277 transitions, 4198 flow. Second operand 23 states and 2008 transitions. [2023-08-30 15:21:39,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 668 transitions, 9748 flow [2023-08-30 15:21:39,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 668 transitions, 9403 flow, removed 3 selfloop flow, removed 21 redundant places. [2023-08-30 15:21:39,335 INFO L231 Difference]: Finished difference. Result has 276 places, 276 transitions, 4088 flow [2023-08-30 15:21:39,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=3838, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4088, PETRI_PLACES=276, PETRI_TRANSITIONS=276} [2023-08-30 15:21:39,336 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 237 predicate places. [2023-08-30 15:21:39,336 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 276 transitions, 4088 flow [2023-08-30 15:21:39,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 80.41304347826087) internal successors, (3699), 46 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:39,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:21:39,336 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:21:39,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-30 15:21:39,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:21:39,537 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:21:39,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:21:39,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1181524671, now seen corresponding path program 9 times [2023-08-30 15:21:39,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:21:39,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638856613] [2023-08-30 15:21:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:21:39,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:21:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:21:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:40,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:21:40,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638856613] [2023-08-30 15:21:40,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638856613] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:21:40,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476231855] [2023-08-30 15:21:40,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:21:40,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:21:40,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:21:40,041 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:21:40,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-30 15:21:40,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 15:21:40,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:21:40,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 15:21:40,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:21:40,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 15:21:40,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:21:40,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 15:21:40,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:21:40,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 15:21:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:40,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:21:41,524 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:21:41,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 15:21:41,531 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:21:41,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 71 [2023-08-30 15:21:41,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2023-08-30 15:21:41,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2023-08-30 15:21:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:42,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476231855] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:21:42,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:21:42,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2023-08-30 15:21:42,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986951285] [2023-08-30 15:21:42,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:21:42,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-30 15:21:42,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:21:42,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-30 15:21:42,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1942, Unknown=0, NotChecked=0, Total=2162 [2023-08-30 15:21:43,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:21:47,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:21:48,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 248 [2023-08-30 15:21:48,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 276 transitions, 4088 flow. Second operand has 47 states, 47 states have (on average 85.46808510638297) internal successors, (4017), 47 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:48,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:21:48,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 248 [2023-08-30 15:21:48,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:22:12,778 INFO L130 PetriNetUnfolder]: 19302/33450 cut-off events. [2023-08-30 15:22:12,779 INFO L131 PetriNetUnfolder]: For 349930/350470 co-relation queries the response was YES. [2023-08-30 15:22:12,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232789 conditions, 33450 events. 19302/33450 cut-off events. For 349930/350470 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 271158 event pairs, 1265 based on Foata normal form. 1522/33124 useless extension candidates. Maximal degree in co-relation 232738. Up to 9760 conditions per place. [2023-08-30 15:22:13,099 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 2620 selfloop transitions, 96 changer transitions 122/2842 dead transitions. [2023-08-30 15:22:13,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 2842 transitions, 56287 flow [2023-08-30 15:22:13,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-30 15:22:13,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-30 15:22:13,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 6015 transitions. [2023-08-30 15:22:13,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37896925403225806 [2023-08-30 15:22:13,103 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 6015 transitions. [2023-08-30 15:22:13,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 6015 transitions. [2023-08-30 15:22:13,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:22:13,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 6015 transitions. [2023-08-30 15:22:13,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 93.984375) internal successors, (6015), 64 states have internal predecessors, (6015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:13,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 248.0) internal successors, (16120), 65 states have internal predecessors, (16120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:13,114 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 248.0) internal successors, (16120), 65 states have internal predecessors, (16120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:13,114 INFO L175 Difference]: Start difference. First operand has 276 places, 276 transitions, 4088 flow. Second operand 64 states and 6015 transitions. [2023-08-30 15:22:13,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 2842 transitions, 56287 flow [2023-08-30 15:22:13,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 2842 transitions, 53312 flow, removed 70 selfloop flow, removed 20 redundant places. [2023-08-30 15:22:13,976 INFO L231 Difference]: Finished difference. Result has 325 places, 341 transitions, 4838 flow [2023-08-30 15:22:13,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=3879, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=4838, PETRI_PLACES=325, PETRI_TRANSITIONS=341} [2023-08-30 15:22:13,977 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 286 predicate places. [2023-08-30 15:22:13,977 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 341 transitions, 4838 flow [2023-08-30 15:22:13,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 85.46808510638297) internal successors, (4017), 47 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:13,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:22:13,978 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1] [2023-08-30 15:22:13,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-30 15:22:14,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:14,182 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:22:14,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:22:14,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1973822289, now seen corresponding path program 8 times [2023-08-30 15:22:14,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:22:14,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608081649] [2023-08-30 15:22:14,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:14,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:22:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:14,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:22:14,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608081649] [2023-08-30 15:22:14,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608081649] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:22:14,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396049563] [2023-08-30 15:22:14,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:22:14,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:14,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:22:14,398 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:22:14,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-30 15:22:14,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:22:14,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:22:14,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 15:22:14,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:22:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:14,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:22:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:14,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396049563] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:22:14,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:22:14,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2023-08-30 15:22:14,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018377158] [2023-08-30 15:22:14,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:22:14,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 15:22:14,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:22:14,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 15:22:14,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2023-08-30 15:22:15,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 15:22:15,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 341 transitions, 4838 flow. Second operand has 39 states, 39 states have (on average 97.48717948717949) internal successors, (3802), 39 states have internal predecessors, (3802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:15,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:22:15,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 15:22:15,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:22:20,250 INFO L130 PetriNetUnfolder]: 17299/30229 cut-off events. [2023-08-30 15:22:20,250 INFO L131 PetriNetUnfolder]: For 335959/337006 co-relation queries the response was YES. [2023-08-30 15:22:20,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220593 conditions, 30229 events. 17299/30229 cut-off events. For 335959/337006 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 245325 event pairs, 6543 based on Foata normal form. 1598/30697 useless extension candidates. Maximal degree in co-relation 220536. Up to 12004 conditions per place. [2023-08-30 15:22:20,540 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 626 selfloop transitions, 88 changer transitions 112/829 dead transitions. [2023-08-30 15:22:20,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 829 transitions, 12540 flow [2023-08-30 15:22:20,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 15:22:20,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 15:22:20,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2496 transitions. [2023-08-30 15:22:20,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2023-08-30 15:22:20,542 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2496 transitions. [2023-08-30 15:22:20,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2496 transitions. [2023-08-30 15:22:20,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:22:20,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2496 transitions. [2023-08-30 15:22:20,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 104.0) internal successors, (2496), 24 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:20,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 248.0) internal successors, (6200), 25 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:20,547 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 248.0) internal successors, (6200), 25 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:20,547 INFO L175 Difference]: Start difference. First operand has 325 places, 341 transitions, 4838 flow. Second operand 24 states and 2496 transitions. [2023-08-30 15:22:20,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 829 transitions, 12540 flow [2023-08-30 15:22:21,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 829 transitions, 11525 flow, removed 35 selfloop flow, removed 23 redundant places. [2023-08-30 15:22:21,747 INFO L231 Difference]: Finished difference. Result has 330 places, 345 transitions, 5031 flow [2023-08-30 15:22:21,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=4312, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5031, PETRI_PLACES=330, PETRI_TRANSITIONS=345} [2023-08-30 15:22:21,748 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 291 predicate places. [2023-08-30 15:22:21,748 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 345 transitions, 5031 flow [2023-08-30 15:22:21,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 97.48717948717949) internal successors, (3802), 39 states have internal predecessors, (3802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:21,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:22:21,748 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:22:21,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-30 15:22:21,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-08-30 15:22:21,949 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:22:21,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:22:21,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1181524670, now seen corresponding path program 5 times [2023-08-30 15:22:21,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:22:21,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551984522] [2023-08-30 15:22:21,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:21,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:22:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:22,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:22:22,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551984522] [2023-08-30 15:22:22,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551984522] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:22:22,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338683163] [2023-08-30 15:22:22,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:22:22,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:22,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:22:22,381 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:22:22,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-30 15:22:22,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-30 15:22:22,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:22:22,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 15:22:22,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:22:22,767 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 15:22:22,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:22:22,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:22:22,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:22:22,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:22:23,085 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:23,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:22:23,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:22:23,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 15:22:23,346 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:22:23,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 147 [2023-08-30 15:22:23,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2023-08-30 15:22:23,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-08-30 15:22:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:23,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338683163] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:22:23,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:22:23,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-30 15:22:23,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086563914] [2023-08-30 15:22:23,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:22:23,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 15:22:23,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:22:23,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 15:22:23,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1818, Unknown=18, NotChecked=0, Total=1980 [2023-08-30 15:22:26,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 15:22:26,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 345 transitions, 5031 flow. Second operand has 45 states, 45 states have (on average 80.46666666666667) internal successors, (3621), 45 states have internal predecessors, (3621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:26,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:22:26,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 15:22:26,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:22:31,969 INFO L130 PetriNetUnfolder]: 14702/26103 cut-off events. [2023-08-30 15:22:31,969 INFO L131 PetriNetUnfolder]: For 304899/305276 co-relation queries the response was YES. [2023-08-30 15:22:32,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182648 conditions, 26103 events. 14702/26103 cut-off events. For 304899/305276 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 209270 event pairs, 2236 based on Foata normal form. 1785/26492 useless extension candidates. Maximal degree in co-relation 182585. Up to 7785 conditions per place. [2023-08-30 15:22:32,359 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 1297 selfloop transitions, 80 changer transitions 0/1382 dead transitions. [2023-08-30 15:22:32,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 1382 transitions, 28218 flow [2023-08-30 15:22:32,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 15:22:32,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 15:22:32,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1998 transitions. [2023-08-30 15:22:32,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3502805049088359 [2023-08-30 15:22:32,361 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1998 transitions. [2023-08-30 15:22:32,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1998 transitions. [2023-08-30 15:22:32,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:22:32,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1998 transitions. [2023-08-30 15:22:32,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 86.8695652173913) internal successors, (1998), 23 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:32,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 248.0) internal successors, (5952), 24 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:32,365 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 248.0) internal successors, (5952), 24 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:32,365 INFO L175 Difference]: Start difference. First operand has 330 places, 345 transitions, 5031 flow. Second operand 23 states and 1998 transitions. [2023-08-30 15:22:32,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 1382 transitions, 28218 flow [2023-08-30 15:22:33,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 1382 transitions, 28199 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-30 15:22:33,306 INFO L231 Difference]: Finished difference. Result has 343 places, 347 transitions, 5247 flow [2023-08-30 15:22:33,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=4998, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5247, PETRI_PLACES=343, PETRI_TRANSITIONS=347} [2023-08-30 15:22:33,307 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 304 predicate places. [2023-08-30 15:22:33,307 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 347 transitions, 5247 flow [2023-08-30 15:22:33,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 80.46666666666667) internal successors, (3621), 45 states have internal predecessors, (3621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:33,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:22:33,307 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1] [2023-08-30 15:22:33,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-30 15:22:33,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-08-30 15:22:33,508 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:22:33,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:22:33,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1898368031, now seen corresponding path program 8 times [2023-08-30 15:22:33,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:22:33,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229892622] [2023-08-30 15:22:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:33,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:22:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:34,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:22:34,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229892622] [2023-08-30 15:22:34,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229892622] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:22:34,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125166833] [2023-08-30 15:22:34,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:22:34,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:34,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:22:34,196 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:22:34,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-30 15:22:34,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:22:34,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:22:34,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 15:22:34,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:22:34,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 15:22:34,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:22:34,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 15:22:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:35,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:22:35,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:22:35,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-08-30 15:22:35,435 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:22:35,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 33 [2023-08-30 15:22:35,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-08-30 15:22:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:35,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125166833] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:22:35,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:22:35,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2023-08-30 15:22:35,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30277080] [2023-08-30 15:22:35,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:22:35,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-08-30 15:22:35,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:22:35,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-08-30 15:22:35,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=2188, Unknown=0, NotChecked=0, Total=2450 [2023-08-30 15:22:41,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:22:43,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 248 [2023-08-30 15:22:43,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 347 transitions, 5247 flow. Second operand has 50 states, 50 states have (on average 86.44) internal successors, (4322), 50 states have internal predecessors, (4322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:43,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:22:43,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 248 [2023-08-30 15:22:43,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:22:46,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:23:00,658 INFO L130 PetriNetUnfolder]: 17326/30008 cut-off events. [2023-08-30 15:23:00,659 INFO L131 PetriNetUnfolder]: For 372905/374054 co-relation queries the response was YES. [2023-08-30 15:23:00,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227299 conditions, 30008 events. 17326/30008 cut-off events. For 372905/374054 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 241713 event pairs, 3859 based on Foata normal form. 1246/31215 useless extension candidates. Maximal degree in co-relation 227233. Up to 8952 conditions per place. [2023-08-30 15:23:00,939 INFO L137 encePairwiseOnDemand]: 237/248 looper letters, 1096 selfloop transitions, 323 changer transitions 21/1443 dead transitions. [2023-08-30 15:23:00,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 1443 transitions, 22721 flow [2023-08-30 15:23:00,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-08-30 15:23:00,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2023-08-30 15:23:00,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 10998 transitions. [2023-08-30 15:23:00,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3605428796223446 [2023-08-30 15:23:00,946 INFO L72 ComplementDD]: Start complementDD. Operand 123 states and 10998 transitions. [2023-08-30 15:23:00,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 123 states and 10998 transitions. [2023-08-30 15:23:00,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:23:00,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 123 states and 10998 transitions. [2023-08-30 15:23:00,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 124 states, 123 states have (on average 89.41463414634147) internal successors, (10998), 123 states have internal predecessors, (10998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:00,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 124 states, 124 states have (on average 248.0) internal successors, (30752), 124 states have internal predecessors, (30752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:00,976 INFO L81 ComplementDD]: Finished complementDD. Result has 124 states, 124 states have (on average 248.0) internal successors, (30752), 124 states have internal predecessors, (30752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:00,977 INFO L175 Difference]: Start difference. First operand has 343 places, 347 transitions, 5247 flow. Second operand 123 states and 10998 transitions. [2023-08-30 15:23:00,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 1443 transitions, 22721 flow [2023-08-30 15:23:03,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 1443 transitions, 21521 flow, removed 35 selfloop flow, removed 19 redundant places. [2023-08-30 15:23:03,129 INFO L231 Difference]: Finished difference. Result has 462 places, 459 transitions, 7788 flow [2023-08-30 15:23:03,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=5072, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=123, PETRI_FLOW=7788, PETRI_PLACES=462, PETRI_TRANSITIONS=459} [2023-08-30 15:23:03,130 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 423 predicate places. [2023-08-30 15:23:03,130 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 459 transitions, 7788 flow [2023-08-30 15:23:03,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 86.44) internal successors, (4322), 50 states have internal predecessors, (4322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:03,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:23:03,131 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2023-08-30 15:23:03,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-30 15:23:03,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-08-30 15:23:03,338 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:23:03,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:23:03,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1465700620, now seen corresponding path program 6 times [2023-08-30 15:23:03,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:23:03,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4191931] [2023-08-30 15:23:03,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:23:03,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:23:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:23:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:23:03,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:23:03,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4191931] [2023-08-30 15:23:03,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4191931] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:23:03,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066157106] [2023-08-30 15:23:03,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:23:03,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:23:03,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:23:03,963 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:23:03,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-30 15:23:04,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-08-30 15:23:04,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:23:04,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 15:23:04,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:23:04,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 15:23:04,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:23:04,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 15:23:04,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:23:04,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 15:23:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:23:04,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:23:05,496 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:23:05,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-08-30 15:23:05,504 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:23:05,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 159 [2023-08-30 15:23:05,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2023-08-30 15:23:05,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2023-08-30 15:23:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:23:06,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066157106] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:23:06,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:23:06,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2023-08-30 15:23:06,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72454257] [2023-08-30 15:23:06,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:23:06,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-08-30 15:23:06,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:23:06,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-08-30 15:23:06,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=2487, Unknown=3, NotChecked=0, Total=2756 [2023-08-30 15:23:09,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 248 [2023-08-30 15:23:09,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 459 transitions, 7788 flow. Second operand has 53 states, 53 states have (on average 71.41509433962264) internal successors, (3785), 53 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:09,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:23:09,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 248 [2023-08-30 15:23:09,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:23:11,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:24:14,483 INFO L130 PetriNetUnfolder]: 24811/43238 cut-off events. [2023-08-30 15:24:14,483 INFO L131 PetriNetUnfolder]: For 617308/619294 co-relation queries the response was YES. [2023-08-30 15:24:15,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334985 conditions, 43238 events. 24811/43238 cut-off events. For 617308/619294 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 366932 event pairs, 4684 based on Foata normal form. 2918/43572 useless extension candidates. Maximal degree in co-relation 334904. Up to 12907 conditions per place. [2023-08-30 15:24:15,347 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 2612 selfloop transitions, 326 changer transitions 119/3060 dead transitions. [2023-08-30 15:24:15,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 3060 transitions, 46470 flow [2023-08-30 15:24:15,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-08-30 15:24:15,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2023-08-30 15:24:15,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 7438 transitions. [2023-08-30 15:24:15,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3224939299340964 [2023-08-30 15:24:15,352 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 7438 transitions. [2023-08-30 15:24:15,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 7438 transitions. [2023-08-30 15:24:15,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:24:15,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 7438 transitions. [2023-08-30 15:24:15,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 79.97849462365592) internal successors, (7438), 93 states have internal predecessors, (7438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:15,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 248.0) internal successors, (23312), 94 states have internal predecessors, (23312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:15,373 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 248.0) internal successors, (23312), 94 states have internal predecessors, (23312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:15,373 INFO L175 Difference]: Start difference. First operand has 462 places, 459 transitions, 7788 flow. Second operand 93 states and 7438 transitions. [2023-08-30 15:24:15,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 3060 transitions, 46470 flow [2023-08-30 15:24:20,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 3060 transitions, 45297 flow, removed 93 selfloop flow, removed 79 redundant places. [2023-08-30 15:24:20,818 INFO L231 Difference]: Finished difference. Result has 479 places, 547 transitions, 9257 flow [2023-08-30 15:24:20,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=6639, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=9257, PETRI_PLACES=479, PETRI_TRANSITIONS=547} [2023-08-30 15:24:20,818 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 440 predicate places. [2023-08-30 15:24:20,818 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 547 transitions, 9257 flow [2023-08-30 15:24:20,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 71.41509433962264) internal successors, (3785), 53 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:20,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:24:20,819 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2023-08-30 15:24:20,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-30 15:24:21,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-08-30 15:24:21,020 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:24:21,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:24:21,020 INFO L85 PathProgramCache]: Analyzing trace with hash -435426583, now seen corresponding path program 9 times [2023-08-30 15:24:21,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:24:21,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492233666] [2023-08-30 15:24:21,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:24:21,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:24:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:24:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:24:21,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:24:21,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492233666] [2023-08-30 15:24:21,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492233666] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:24:21,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959793586] [2023-08-30 15:24:21,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:24:21,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:24:21,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:24:21,596 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:24:21,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-30 15:24:22,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-08-30 15:24:22,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:24:22,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 15:24:22,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:24:22,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 15:24:22,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:24:22,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 15:24:22,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:24:22,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 15:24:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:24:22,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:24:23,212 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:24:23,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 15:24:23,220 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:24:23,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 71 [2023-08-30 15:24:23,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2023-08-30 15:24:23,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2023-08-30 15:24:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:24:23,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959793586] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:24:23,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:24:23,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2023-08-30 15:24:23,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856494860] [2023-08-30 15:24:23,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:24:23,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-08-30 15:24:23,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:24:23,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-08-30 15:24:23,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2483, Unknown=1, NotChecked=0, Total=2756 [2023-08-30 15:24:28,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 248 [2023-08-30 15:24:28,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 547 transitions, 9257 flow. Second operand has 53 states, 53 states have (on average 71.41509433962264) internal successors, (3785), 53 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:28,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:24:28,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 248 [2023-08-30 15:24:28,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:24:29,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:24:53,995 INFO L130 PetriNetUnfolder]: 24067/42219 cut-off events. [2023-08-30 15:24:53,995 INFO L131 PetriNetUnfolder]: For 591408/593358 co-relation queries the response was YES. [2023-08-30 15:24:54,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325311 conditions, 42219 events. 24067/42219 cut-off events. For 591408/593358 co-relation queries the response was YES. Maximal size of possible extension queue 1067. Compared 359702 event pairs, 4609 based on Foata normal form. 2557/42240 useless extension candidates. Maximal degree in co-relation 325232. Up to 12805 conditions per place. [2023-08-30 15:24:54,608 INFO L137 encePairwiseOnDemand]: 239/248 looper letters, 2609 selfloop transitions, 324 changer transitions 119/3055 dead transitions. [2023-08-30 15:24:54,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 3055 transitions, 45977 flow [2023-08-30 15:24:54,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-08-30 15:24:54,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2023-08-30 15:24:54,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 7432 transitions. [2023-08-30 15:24:54,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32223378425251475 [2023-08-30 15:24:54,613 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 7432 transitions. [2023-08-30 15:24:54,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 7432 transitions. [2023-08-30 15:24:54,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:24:54,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 7432 transitions. [2023-08-30 15:24:54,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 79.91397849462365) internal successors, (7432), 93 states have internal predecessors, (7432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:54,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 248.0) internal successors, (23312), 94 states have internal predecessors, (23312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:54,628 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 248.0) internal successors, (23312), 94 states have internal predecessors, (23312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:54,628 INFO L175 Difference]: Start difference. First operand has 479 places, 547 transitions, 9257 flow. Second operand 93 states and 7432 transitions. [2023-08-30 15:24:54,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 3055 transitions, 45977 flow [2023-08-30 15:24:59,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 3055 transitions, 44835 flow, removed 68 selfloop flow, removed 46 redundant places. [2023-08-30 15:25:00,013 INFO L231 Difference]: Finished difference. Result has 525 places, 544 transitions, 8713 flow [2023-08-30 15:25:00,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=8065, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=324, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=8713, PETRI_PLACES=525, PETRI_TRANSITIONS=544} [2023-08-30 15:25:00,014 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 486 predicate places. [2023-08-30 15:25:00,014 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 544 transitions, 8713 flow [2023-08-30 15:25:00,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 71.41509433962264) internal successors, (3785), 53 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:00,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:00,015 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:25:00,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-30 15:25:00,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:00,223 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:25:00,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:00,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1573816566, now seen corresponding path program 6 times [2023-08-30 15:25:00,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:00,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641304302] [2023-08-30 15:25:00,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:00,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:00,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:00,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641304302] [2023-08-30 15:25:00,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641304302] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:00,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410595792] [2023-08-30 15:25:00,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:25:00,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:00,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:00,404 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:25:00,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-30 15:25:00,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-08-30 15:25:00,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:25:00,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 15:25:00,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:01,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:25:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:01,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410595792] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:25:01,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:25:01,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2023-08-30 15:25:01,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925956088] [2023-08-30 15:25:01,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:25:01,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 15:25:01,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:01,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 15:25:01,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2023-08-30 15:25:01,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 15:25:01,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 544 transitions, 8713 flow. Second operand has 39 states, 39 states have (on average 97.48717948717949) internal successors, (3802), 39 states have internal predecessors, (3802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:01,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:01,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 15:25:01,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:09,163 INFO L130 PetriNetUnfolder]: 23608/41623 cut-off events. [2023-08-30 15:25:09,163 INFO L131 PetriNetUnfolder]: For 544495/544495 co-relation queries the response was YES. [2023-08-30 15:25:09,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312998 conditions, 41623 events. 23608/41623 cut-off events. For 544495/544495 co-relation queries the response was YES. Maximal size of possible extension queue 1032. Compared 347170 event pairs, 10111 based on Foata normal form. 364/39448 useless extension candidates. Maximal degree in co-relation 312934. Up to 26282 conditions per place. [2023-08-30 15:25:09,603 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 530 selfloop transitions, 22 changer transitions 515/1073 dead transitions. [2023-08-30 15:25:09,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 1073 transitions, 20620 flow [2023-08-30 15:25:09,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 15:25:09,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 15:25:09,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1836 transitions. [2023-08-30 15:25:09,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112903225806452 [2023-08-30 15:25:09,604 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1836 transitions. [2023-08-30 15:25:09,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1836 transitions. [2023-08-30 15:25:09,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:09,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1836 transitions. [2023-08-30 15:25:09,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:09,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 248.0) internal successors, (4712), 19 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:09,608 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 248.0) internal successors, (4712), 19 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:09,608 INFO L175 Difference]: Start difference. First operand has 525 places, 544 transitions, 8713 flow. Second operand 18 states and 1836 transitions. [2023-08-30 15:25:09,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 1073 transitions, 20620 flow [2023-08-30 15:25:13,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 1073 transitions, 19281 flow, removed 11 selfloop flow, removed 68 redundant places. [2023-08-30 15:25:13,437 INFO L231 Difference]: Finished difference. Result has 474 places, 415 transitions, 6339 flow [2023-08-30 15:25:13,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=8086, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6339, PETRI_PLACES=474, PETRI_TRANSITIONS=415} [2023-08-30 15:25:13,438 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 435 predicate places. [2023-08-30 15:25:13,438 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 415 transitions, 6339 flow [2023-08-30 15:25:13,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 97.48717948717949) internal successors, (3802), 39 states have internal predecessors, (3802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:13,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:13,438 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1] [2023-08-30 15:25:13,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-30 15:25:13,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:13,639 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:25:13,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:13,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1280133759, now seen corresponding path program 1 times [2023-08-30 15:25:13,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:13,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004402279] [2023-08-30 15:25:13,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:13,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-30 15:25:13,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:13,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004402279] [2023-08-30 15:25:13,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004402279] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:13,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631783641] [2023-08-30 15:25:13,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:13,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:13,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:13,729 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:25:13,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-30 15:25:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:14,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 15:25:14,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-30 15:25:14,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:25:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-30 15:25:14,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631783641] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:25:14,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:25:14,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-08-30 15:25:14,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609545915] [2023-08-30 15:25:14,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:25:14,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 15:25:14,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:14,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 15:25:14,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-08-30 15:25:14,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 248 [2023-08-30 15:25:14,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 415 transitions, 6339 flow. Second operand has 17 states, 17 states have (on average 108.17647058823529) internal successors, (1839), 17 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:14,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:14,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 248 [2023-08-30 15:25:14,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:27,281 INFO L130 PetriNetUnfolder]: 41726/71621 cut-off events. [2023-08-30 15:25:27,281 INFO L131 PetriNetUnfolder]: For 1199246/1202429 co-relation queries the response was YES. [2023-08-30 15:25:28,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572972 conditions, 71621 events. 41726/71621 cut-off events. For 1199246/1202429 co-relation queries the response was YES. Maximal size of possible extension queue 1173. Compared 596507 event pairs, 13342 based on Foata normal form. 7391/78982 useless extension candidates. Maximal degree in co-relation 572910. Up to 21531 conditions per place. [2023-08-30 15:25:28,451 INFO L137 encePairwiseOnDemand]: 244/248 looper letters, 1433 selfloop transitions, 266 changer transitions 0/1701 dead transitions. [2023-08-30 15:25:28,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 1701 transitions, 28888 flow [2023-08-30 15:25:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 15:25:28,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 15:25:28,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2076 transitions. [2023-08-30 15:25:28,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49240986717267554 [2023-08-30 15:25:28,453 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2076 transitions. [2023-08-30 15:25:28,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2076 transitions. [2023-08-30 15:25:28,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:28,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2076 transitions. [2023-08-30 15:25:28,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 122.11764705882354) internal successors, (2076), 17 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 15:25:28,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 248.0) internal successors, (4464), 18 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:28,456 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 248.0) internal successors, (4464), 18 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:28,456 INFO L175 Difference]: Start difference. First operand has 474 places, 415 transitions, 6339 flow. Second operand 17 states and 2076 transitions. [2023-08-30 15:25:28,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 1701 transitions, 28888 flow [2023-08-30 15:25:55,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 1701 transitions, 27665 flow, removed 167 selfloop flow, removed 18 redundant places. [2023-08-30 15:25:55,226 INFO L231 Difference]: Finished difference. Result has 391 places, 557 transitions, 10131 flow [2023-08-30 15:25:55,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=6024, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10131, PETRI_PLACES=391, PETRI_TRANSITIONS=557} [2023-08-30 15:25:55,227 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 352 predicate places. [2023-08-30 15:25:55,227 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 557 transitions, 10131 flow [2023-08-30 15:25:55,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 108.17647058823529) internal successors, (1839), 17 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:55,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:55,227 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:25:55,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-08-30 15:25:55,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:55,428 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:25:55,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:55,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1603253898, now seen corresponding path program 7 times [2023-08-30 15:25:55,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:55,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916993536] [2023-08-30 15:25:55,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:55,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:56,005 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:56,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:56,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916993536] [2023-08-30 15:25:56,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916993536] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:56,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067001606] [2023-08-30 15:25:56,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 15:25:56,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:56,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:56,006 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:25:56,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-30 15:25:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:56,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 15:25:56,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:56,466 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 15:25:56,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:25:56,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:25:56,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:25:56,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:25:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:56,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:25:56,957 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2486 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2486) c_~A~0.base) (+ c_~A~0.offset 24)) 4294967296))) is different from false [2023-08-30 15:25:57,020 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:25:57,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 15:25:57,027 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:25:57,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 75 [2023-08-30 15:25:57,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2023-08-30 15:25:57,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-08-30 15:25:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:57,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067001606] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:25:57,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:25:57,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-08-30 15:25:57,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818200368] [2023-08-30 15:25:57,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:25:57,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-08-30 15:25:57,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:57,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-08-30 15:25:57,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2282, Unknown=10, NotChecked=96, Total=2550 [2023-08-30 15:25:57,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 15:25:57,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 557 transitions, 10131 flow. Second operand has 51 states, 51 states have (on average 80.47058823529412) internal successors, (4104), 51 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:57,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:57,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 15:25:57,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:26:17,264 INFO L130 PetriNetUnfolder]: 48983/84065 cut-off events. [2023-08-30 15:26:17,264 INFO L131 PetriNetUnfolder]: For 1264996/1264996 co-relation queries the response was YES. [2023-08-30 15:26:18,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685884 conditions, 84065 events. 48983/84065 cut-off events. For 1264996/1264996 co-relation queries the response was YES. Maximal size of possible extension queue 1309. Compared 718092 event pairs, 7279 based on Foata normal form. 2488/80321 useless extension candidates. Maximal degree in co-relation 685821. Up to 24709 conditions per place. [2023-08-30 15:26:18,819 INFO L137 encePairwiseOnDemand]: 238/248 looper letters, 3920 selfloop transitions, 63 changer transitions 0/3989 dead transitions. [2023-08-30 15:26:18,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 3989 transitions, 95374 flow [2023-08-30 15:26:18,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 15:26:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 15:26:18,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2260 transitions. [2023-08-30 15:26:18,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35049627791563276 [2023-08-30 15:26:18,821 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2260 transitions. [2023-08-30 15:26:18,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2260 transitions. [2023-08-30 15:26:18,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:26:18,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2260 transitions. [2023-08-30 15:26:18,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 86.92307692307692) internal successors, (2260), 26 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:18,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 248.0) internal successors, (6696), 27 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:18,825 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 248.0) internal successors, (6696), 27 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:18,825 INFO L175 Difference]: Start difference. First operand has 391 places, 557 transitions, 10131 flow. Second operand 26 states and 2260 transitions. [2023-08-30 15:26:18,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 3989 transitions, 95374 flow [2023-08-30 15:26:26,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 3989 transitions, 90785 flow, removed 1440 selfloop flow, removed 6 redundant places. [2023-08-30 15:26:26,806 INFO L231 Difference]: Finished difference. Result has 412 places, 564 transitions, 10016 flow [2023-08-30 15:26:26,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=9738, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=10016, PETRI_PLACES=412, PETRI_TRANSITIONS=564} [2023-08-30 15:26:26,806 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 373 predicate places. [2023-08-30 15:26:26,806 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 564 transitions, 10016 flow [2023-08-30 15:26:26,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 80.47058823529412) internal successors, (4104), 51 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:26,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:26:26,807 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 6, 1, 1, 1, 1, 1] [2023-08-30 15:26:26,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-08-30 15:26:27,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:26:27,008 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:26:27,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:26:27,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1250696395, now seen corresponding path program 1 times [2023-08-30 15:26:27,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:26:27,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336694787] [2023-08-30 15:26:27,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:26:27,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:26:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:26:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-08-30 15:26:27,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:26:27,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336694787] [2023-08-30 15:26:27,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336694787] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:26:27,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183805777] [2023-08-30 15:26:27,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:26:27,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:26:27,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:26:27,120 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:26:27,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-30 15:26:27,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:26:27,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 15:26:27,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:26:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-08-30 15:26:27,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:26:27,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183805777] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:26:27,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:26:27,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2023-08-30 15:26:27,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737954250] [2023-08-30 15:26:27,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:26:27,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 15:26:27,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:26:27,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 15:26:27,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2023-08-30 15:26:27,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 248 [2023-08-30 15:26:27,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 564 transitions, 10016 flow. Second operand has 9 states, 9 states have (on average 108.11111111111111) internal successors, (973), 9 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:27,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:26:27,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 248 [2023-08-30 15:26:27,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:26:45,482 INFO L130 PetriNetUnfolder]: 44556/78070 cut-off events. [2023-08-30 15:26:45,482 INFO L131 PetriNetUnfolder]: For 1062192/1066420 co-relation queries the response was YES. [2023-08-30 15:26:46,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 641537 conditions, 78070 events. 44556/78070 cut-off events. For 1062192/1066420 co-relation queries the response was YES. Maximal size of possible extension queue 1243. Compared 674664 event pairs, 15493 based on Foata normal form. 7306/84138 useless extension candidates. Maximal degree in co-relation 641471. Up to 52414 conditions per place. [2023-08-30 15:26:47,196 INFO L137 encePairwiseOnDemand]: 245/248 looper letters, 892 selfloop transitions, 112 changer transitions 0/1006 dead transitions. [2023-08-30 15:26:47,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 1006 transitions, 18090 flow [2023-08-30 15:26:47,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 15:26:47,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 15:26:47,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1078 transitions. [2023-08-30 15:26:47,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4829749103942652 [2023-08-30 15:26:47,197 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1078 transitions. [2023-08-30 15:26:47,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1078 transitions. [2023-08-30 15:26:47,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:26:47,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1078 transitions. [2023-08-30 15:26:47,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 119.77777777777777) internal successors, (1078), 9 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:47,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:47,199 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:47,199 INFO L175 Difference]: Start difference. First operand has 412 places, 564 transitions, 10016 flow. Second operand 9 states and 1078 transitions. [2023-08-30 15:26:47,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 1006 transitions, 18090 flow [2023-08-30 15:26:54,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 1006 transitions, 16925 flow, removed 54 selfloop flow, removed 26 redundant places. [2023-08-30 15:26:54,560 INFO L231 Difference]: Finished difference. Result has 392 places, 546 transitions, 9517 flow [2023-08-30 15:26:54,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=9293, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9517, PETRI_PLACES=392, PETRI_TRANSITIONS=546} [2023-08-30 15:26:54,560 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 353 predicate places. [2023-08-30 15:26:54,560 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 546 transitions, 9517 flow [2023-08-30 15:26:54,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 108.11111111111111) internal successors, (973), 9 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:54,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:26:54,561 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:26:54,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-08-30 15:26:54,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:26:54,761 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:26:54,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:26:54,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1779156105, now seen corresponding path program 10 times [2023-08-30 15:26:54,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:26:54,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980358213] [2023-08-30 15:26:54,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:26:54,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:26:54,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:26:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:55,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:26:55,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980358213] [2023-08-30 15:26:55,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980358213] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:26:55,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648890095] [2023-08-30 15:26:55,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:26:55,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:26:55,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:26:55,377 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:26:55,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-30 15:26:55,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:26:55,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:26:55,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 15:26:55,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:26:55,994 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 15:26:56,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:26:56,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-08-30 15:26:56,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:26:56,082 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 15:26:56,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:26:56,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 15:26:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:56,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:26:56,533 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2604 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2604) c_~A~0.base) (+ c_~A~0.offset 24)) 9223372039002259456)) is different from false [2023-08-30 15:26:56,679 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 15:26:56,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 40 [2023-08-30 15:26:56,685 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:26:56,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 129 [2023-08-30 15:26:56,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 15:26:56,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-30 15:26:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:56,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648890095] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:26:56,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:26:56,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2023-08-30 15:26:56,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911266686] [2023-08-30 15:26:56,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:26:56,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-08-30 15:26:56,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:26:56,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-08-30 15:26:56,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2566, Unknown=18, NotChecked=102, Total=2862 [2023-08-30 15:26:57,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 248 [2023-08-30 15:26:57,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 546 transitions, 9517 flow. Second operand has 54 states, 54 states have (on average 80.44444444444444) internal successors, (4344), 54 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:57,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:26:57,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 248 [2023-08-30 15:26:57,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:27:14,032 INFO L130 PetriNetUnfolder]: 44409/77773 cut-off events. [2023-08-30 15:27:14,033 INFO L131 PetriNetUnfolder]: For 898592/898877 co-relation queries the response was YES. [2023-08-30 15:27:15,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607961 conditions, 77773 events. 44409/77773 cut-off events. For 898592/898877 co-relation queries the response was YES. Maximal size of possible extension queue 1194. Compared 675975 event pairs, 6360 based on Foata normal form. 1035/72744 useless extension candidates. Maximal degree in co-relation 607899. Up to 21045 conditions per place. [2023-08-30 15:27:15,519 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 3749 selfloop transitions, 64 changer transitions 0/3819 dead transitions. [2023-08-30 15:27:15,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 3819 transitions, 87346 flow [2023-08-30 15:27:15,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 15:27:15,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 15:27:15,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2241 transitions. [2023-08-30 15:27:15,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3475496277915633 [2023-08-30 15:27:15,522 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2241 transitions. [2023-08-30 15:27:15,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2241 transitions. [2023-08-30 15:27:15,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:27:15,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2241 transitions. [2023-08-30 15:27:15,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 86.1923076923077) internal successors, (2241), 26 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:27:15,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 248.0) internal successors, (6696), 27 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:27:15,526 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 248.0) internal successors, (6696), 27 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:27:15,526 INFO L175 Difference]: Start difference. First operand has 392 places, 546 transitions, 9517 flow. Second operand 26 states and 2241 transitions. [2023-08-30 15:27:15,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 3819 transitions, 87346 flow [2023-08-30 15:27:18,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 3819 transitions, 85584 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 15:27:18,717 INFO L231 Difference]: Finished difference. Result has 410 places, 545 transitions, 9421 flow [2023-08-30 15:27:18,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=9293, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9421, PETRI_PLACES=410, PETRI_TRANSITIONS=545} [2023-08-30 15:27:18,718 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 371 predicate places. [2023-08-30 15:27:18,718 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 545 transitions, 9421 flow [2023-08-30 15:27:18,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 80.44444444444444) internal successors, (4344), 54 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:27:18,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:27:18,719 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 7, 7, 1, 1, 1, 1, 1] [2023-08-30 15:27:18,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-08-30 15:27:18,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-08-30 15:27:18,919 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:27:18,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:27:18,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1892379214, now seen corresponding path program 7 times [2023-08-30 15:27:18,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:27:18,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695319605] [2023-08-30 15:27:18,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:27:18,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:27:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:27:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:27:19,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:27:19,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695319605] [2023-08-30 15:27:19,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695319605] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:27:19,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611680919] [2023-08-30 15:27:19,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 15:27:19,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:27:19,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:27:19,632 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:27:19,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-30 15:27:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:27:19,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-30 15:27:19,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:27:20,123 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 15:27:20,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:27:20,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 15:27:20,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:27:20,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:27:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:27:20,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:27:20,856 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 15:27:20,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 39 [2023-08-30 15:27:20,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:27:20,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2023-08-30 15:27:20,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-08-30 15:27:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:27:21,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611680919] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:27:21,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:27:21,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2023-08-30 15:27:21,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551142042] [2023-08-30 15:27:21,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:27:21,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-08-30 15:27:21,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:27:21,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-08-30 15:27:21,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2979, Unknown=27, NotChecked=0, Total=3192 [2023-08-30 15:27:24,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 248 [2023-08-30 15:27:24,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 545 transitions, 9421 flow. Second operand has 57 states, 57 states have (on average 95.42105263157895) internal successors, (5439), 57 states have internal predecessors, (5439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:27:24,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:27:24,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 248 [2023-08-30 15:27:24,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand