/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.error.function.in.sv-comp.mode false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-53ca081-m [2022-09-16 12:00:19,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-16 12:00:19,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-16 12:00:19,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-16 12:00:19,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-16 12:00:19,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-16 12:00:19,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-16 12:00:19,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-16 12:00:19,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-16 12:00:19,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-16 12:00:19,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-16 12:00:19,207 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-16 12:00:19,207 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-16 12:00:19,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-16 12:00:19,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-16 12:00:19,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-16 12:00:19,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-16 12:00:19,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-16 12:00:19,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-16 12:00:19,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-16 12:00:19,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-16 12:00:19,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-16 12:00:19,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-16 12:00:19,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-16 12:00:19,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-16 12:00:19,234 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-16 12:00:19,234 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-16 12:00:19,235 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-16 12:00:19,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-16 12:00:19,236 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-16 12:00:19,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-16 12:00:19,237 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-16 12:00:19,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-16 12:00:19,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-16 12:00:19,241 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-16 12:00:19,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-16 12:00:19,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-16 12:00:19,241 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-16 12:00:19,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-16 12:00:19,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-16 12:00:19,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-16 12:00:19,244 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2022-09-16 12:00:19,274 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-16 12:00:19,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-16 12:00:19,276 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-16 12:00:19,276 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-16 12:00:19,276 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-16 12:00:19,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-16 12:00:19,277 INFO L138 SettingsManager]: * Use SBE=true [2022-09-16 12:00:19,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-16 12:00:19,277 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-16 12:00:19,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-16 12:00:19,278 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-16 12:00:19,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-16 12:00:19,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-16 12:00:19,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-16 12:00:19,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-16 12:00:19,279 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-16 12:00:19,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-16 12:00:19,280 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-16 12:00:19,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-16 12:00:19,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-16 12:00:19,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-16 12:00:19,280 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-16 12:00:19,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-16 12:00:19,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-16 12:00:19,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-16 12:00:19,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-16 12:00:19,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-16 12:00:19,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-16 12:00:19,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-16 12:00:19,283 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-16 12:00:19,283 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-16 12:00:19,283 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of error function in SV-COMP mode -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2022-09-16 12:00:19,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-16 12:00:19,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-16 12:00:19,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-16 12:00:19,568 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-16 12:00:19,569 INFO L275 PluginConnector]: CDTParser initialized [2022-09-16 12:00:19,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-09-16 12:00:19,628 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e6156810/868ce423ce544211add158438dbd6dc0/FLAG700880d00 [2022-09-16 12:00:20,012 INFO L306 CDTParser]: Found 1 translation units. [2022-09-16 12:00:20,013 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-09-16 12:00:20,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e6156810/868ce423ce544211add158438dbd6dc0/FLAG700880d00 [2022-09-16 12:00:20,433 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e6156810/868ce423ce544211add158438dbd6dc0 [2022-09-16 12:00:20,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-16 12:00:20,437 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-16 12:00:20,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-16 12:00:20,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-16 12:00:20,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-16 12:00:20,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 12:00:20" (1/1) ... [2022-09-16 12:00:20,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d5aef72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:20, skipping insertion in model container [2022-09-16 12:00:20,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 12:00:20" (1/1) ... [2022-09-16 12:00:20,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-16 12:00:20,479 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-16 12:00:20,664 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2022-09-16 12:00:20,666 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-16 12:00:20,678 INFO L203 MainTranslator]: Completed pre-run [2022-09-16 12:00:20,719 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2022-09-16 12:00:20,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-16 12:00:20,731 INFO L208 MainTranslator]: Completed translation [2022-09-16 12:00:20,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:20 WrapperNode [2022-09-16 12:00:20,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-16 12:00:20,733 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-16 12:00:20,733 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-16 12:00:20,733 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-16 12:00:20,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:20" (1/1) ... [2022-09-16 12:00:20,748 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:20" (1/1) ... [2022-09-16 12:00:20,769 INFO L138 Inliner]: procedures = 22, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 141 [2022-09-16 12:00:20,770 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-16 12:00:20,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-16 12:00:20,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-16 12:00:20,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-16 12:00:20,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:20" (1/1) ... [2022-09-16 12:00:20,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:20" (1/1) ... [2022-09-16 12:00:20,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:20" (1/1) ... [2022-09-16 12:00:20,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:20" (1/1) ... [2022-09-16 12:00:20,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:20" (1/1) ... [2022-09-16 12:00:20,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:20" (1/1) ... [2022-09-16 12:00:20,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:20" (1/1) ... [2022-09-16 12:00:20,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-16 12:00:20,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-16 12:00:20,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-16 12:00:20,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-16 12:00:20,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:20" (1/1) ... [2022-09-16 12:00:20,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-16 12:00:20,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:00:20,869 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) [2022-09-16 12:00:20,883 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 [2022-09-16 12:00:20,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-16 12:00:20,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-09-16 12:00:20,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-09-16 12:00:20,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-09-16 12:00:20,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-09-16 12:00:20,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-09-16 12:00:20,924 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-09-16 12:00:20,924 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-09-16 12:00:20,924 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-09-16 12:00:20,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-16 12:00:20,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-16 12:00:20,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-16 12:00:20,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-09-16 12:00:20,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-09-16 12:00:20,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-16 12:00:20,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-16 12:00:20,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-16 12:00:20,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-16 12:00:20,927 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-16 12:00:21,050 INFO L234 CfgBuilder]: Building ICFG [2022-09-16 12:00:21,052 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-16 12:00:21,314 INFO L275 CfgBuilder]: Performing block encoding [2022-09-16 12:00:21,459 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-16 12:00:21,460 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-09-16 12:00:21,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 12:00:21 BoogieIcfgContainer [2022-09-16 12:00:21,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-16 12:00:21,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-16 12:00:21,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-16 12:00:21,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-16 12:00:21,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 12:00:20" (1/3) ... [2022-09-16 12:00:21,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@688e059a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 12:00:21, skipping insertion in model container [2022-09-16 12:00:21,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:20" (2/3) ... [2022-09-16 12:00:21,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@688e059a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 12:00:21, skipping insertion in model container [2022-09-16 12:00:21,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 12:00:21" (3/3) ... [2022-09-16 12:00:21,471 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-09-16 12:00:21,491 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-16 12:00:21,491 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-09-16 12:00:21,491 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-16 12:00:21,600 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-09-16 12:00:21,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 146 transitions, 324 flow [2022-09-16 12:00:21,763 INFO L130 PetriNetUnfolder]: 10/142 cut-off events. [2022-09-16 12:00:21,764 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-09-16 12:00:21,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 142 events. 10/142 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 125 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2022-09-16 12:00:21,779 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 146 transitions, 324 flow [2022-09-16 12:00:21,786 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 119 transitions, 259 flow [2022-09-16 12:00:21,797 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-16 12:00:21,803 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=false, 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;@406d020c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-16 12:00:21,804 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2022-09-16 12:00:21,823 INFO L130 PetriNetUnfolder]: 3/54 cut-off events. [2022-09-16 12:00:21,823 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-16 12:00:21,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:21,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:21,825 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-09-16 12:00:21,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:21,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1875315820, now seen corresponding path program 1 times [2022-09-16 12:00:21,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:21,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749165657] [2022-09-16 12:00:21,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:21,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:22,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:22,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749165657] [2022-09-16 12:00:22,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749165657] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:00:22,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:00:22,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-16 12:00:22,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466555072] [2022-09-16 12:00:22,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:00:22,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-16 12:00:22,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:22,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-16 12:00:22,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-16 12:00:22,226 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 146 [2022-09-16 12:00:22,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 119 transitions, 259 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:22,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:22,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 146 [2022-09-16 12:00:22,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:23,377 INFO L130 PetriNetUnfolder]: 4277/6292 cut-off events. [2022-09-16 12:00:23,377 INFO L131 PetriNetUnfolder]: For 925/983 co-relation queries the response was YES. [2022-09-16 12:00:23,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12854 conditions, 6292 events. 4277/6292 cut-off events. For 925/983 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 37109 event pairs, 1329 based on Foata normal form. 926/3147 useless extension candidates. Maximal degree in co-relation 12331. Up to 3392 conditions per place. [2022-09-16 12:00:23,471 INFO L137 encePairwiseOnDemand]: 135/146 looper letters, 50 selfloop transitions, 2 changer transitions 1/136 dead transitions. [2022-09-16 12:00:23,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 136 transitions, 415 flow [2022-09-16 12:00:23,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-16 12:00:23,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-16 12:00:23,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 391 transitions. [2022-09-16 12:00:23,486 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8926940639269406 [2022-09-16 12:00:23,487 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 391 transitions. [2022-09-16 12:00:23,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 391 transitions. [2022-09-16 12:00:23,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:23,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 391 transitions. [2022-09-16 12:00:23,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:23,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:23,508 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:23,510 INFO L175 Difference]: Start difference. First operand has 123 places, 119 transitions, 259 flow. Second operand 3 states and 391 transitions. [2022-09-16 12:00:23,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 136 transitions, 415 flow [2022-09-16 12:00:23,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 136 transitions, 391 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-09-16 12:00:23,530 INFO L231 Difference]: Finished difference. Result has 117 places, 112 transitions, 244 flow [2022-09-16 12:00:23,532 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=117, PETRI_TRANSITIONS=112} [2022-09-16 12:00:23,536 INFO L287 CegarLoopForPetriNet]: 123 programPoint places, -6 predicate places. [2022-09-16 12:00:23,537 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 112 transitions, 244 flow [2022-09-16 12:00:23,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:23,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:23,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:23,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-16 12:00:23,540 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-09-16 12:00:23,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:23,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1875315823, now seen corresponding path program 1 times [2022-09-16 12:00:23,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:23,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835463089] [2022-09-16 12:00:23,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:23,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:23,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:23,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835463089] [2022-09-16 12:00:23,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835463089] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:00:23,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:00:23,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-16 12:00:23,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113246007] [2022-09-16 12:00:23,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:00:23,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-16 12:00:23,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:23,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-16 12:00:23,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-16 12:00:23,648 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 146 [2022-09-16 12:00:23,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 112 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:23,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:23,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 146 [2022-09-16 12:00:23,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:24,296 INFO L130 PetriNetUnfolder]: 3029/4229 cut-off events. [2022-09-16 12:00:24,296 INFO L131 PetriNetUnfolder]: For 421/449 co-relation queries the response was YES. [2022-09-16 12:00:24,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9177 conditions, 4229 events. 3029/4229 cut-off events. For 421/449 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 21556 event pairs, 1995 based on Foata normal form. 12/1488 useless extension candidates. Maximal degree in co-relation 5496. Up to 4063 conditions per place. [2022-09-16 12:00:24,341 INFO L137 encePairwiseOnDemand]: 129/146 looper letters, 31 selfloop transitions, 5 changer transitions 1/122 dead transitions. [2022-09-16 12:00:24,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 122 transitions, 348 flow [2022-09-16 12:00:24,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-16 12:00:24,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-16 12:00:24,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2022-09-16 12:00:24,345 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8561643835616438 [2022-09-16 12:00:24,346 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2022-09-16 12:00:24,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2022-09-16 12:00:24,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:24,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2022-09-16 12:00:24,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:24,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:24,350 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:24,350 INFO L175 Difference]: Start difference. First operand has 117 places, 112 transitions, 244 flow. Second operand 3 states and 375 transitions. [2022-09-16 12:00:24,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 122 transitions, 348 flow [2022-09-16 12:00:24,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 122 transitions, 345 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 12:00:24,356 INFO L231 Difference]: Finished difference. Result has 118 places, 116 transitions, 299 flow [2022-09-16 12:00:24,356 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=299, PETRI_PLACES=118, PETRI_TRANSITIONS=116} [2022-09-16 12:00:24,357 INFO L287 CegarLoopForPetriNet]: 123 programPoint places, -5 predicate places. [2022-09-16 12:00:24,358 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 116 transitions, 299 flow [2022-09-16 12:00:24,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:24,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:24,358 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:24,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-16 12:00:24,359 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-09-16 12:00:24,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:24,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1707777111, now seen corresponding path program 1 times [2022-09-16 12:00:24,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:24,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580804246] [2022-09-16 12:00:24,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:24,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:24,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:24,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580804246] [2022-09-16 12:00:24,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580804246] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:00:24,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615773738] [2022-09-16 12:00:24,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:24,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:00:24,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:00:24,477 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) [2022-09-16 12:00:24,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-09-16 12:00:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:24,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-16 12:00:24,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:00:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:24,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:00:24,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:24,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615773738] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:00:24,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:00:24,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-09-16 12:00:24,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217855922] [2022-09-16 12:00:24,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:00:24,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-16 12:00:24,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:24,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-16 12:00:24,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-09-16 12:00:24,783 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 146 [2022-09-16 12:00:24,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 116 transitions, 299 flow. Second operand has 7 states, 7 states have (on average 110.57142857142857) internal successors, (774), 7 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:24,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:24,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 146 [2022-09-16 12:00:24,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:26,421 INFO L130 PetriNetUnfolder]: 6674/12054 cut-off events. [2022-09-16 12:00:26,421 INFO L131 PetriNetUnfolder]: For 2171/2218 co-relation queries the response was YES. [2022-09-16 12:00:26,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31564 conditions, 12054 events. 6674/12054 cut-off events. For 2171/2218 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 100775 event pairs, 670 based on Foata normal form. 490/6352 useless extension candidates. Maximal degree in co-relation 18363. Up to 7420 conditions per place. [2022-09-16 12:00:26,537 INFO L137 encePairwiseOnDemand]: 127/146 looper letters, 61 selfloop transitions, 60 changer transitions 0/206 dead transitions. [2022-09-16 12:00:26,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 206 transitions, 887 flow [2022-09-16 12:00:26,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-16 12:00:26,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-16 12:00:26,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 908 transitions. [2022-09-16 12:00:26,540 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8884540117416829 [2022-09-16 12:00:26,540 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 908 transitions. [2022-09-16 12:00:26,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 908 transitions. [2022-09-16 12:00:26,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:26,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 908 transitions. [2022-09-16 12:00:26,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 129.71428571428572) internal successors, (908), 7 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:26,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:26,545 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:26,545 INFO L175 Difference]: Start difference. First operand has 118 places, 116 transitions, 299 flow. Second operand 7 states and 908 transitions. [2022-09-16 12:00:26,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 206 transitions, 887 flow [2022-09-16 12:00:26,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 206 transitions, 882 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 12:00:26,551 INFO L231 Difference]: Finished difference. Result has 128 places, 171 transitions, 860 flow [2022-09-16 12:00:26,551 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=860, PETRI_PLACES=128, PETRI_TRANSITIONS=171} [2022-09-16 12:00:26,552 INFO L287 CegarLoopForPetriNet]: 123 programPoint places, 5 predicate places. [2022-09-16 12:00:26,552 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 171 transitions, 860 flow [2022-09-16 12:00:26,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.57142857142857) internal successors, (774), 7 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:26,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:26,553 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:26,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-09-16 12:00:26,772 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 [2022-09-16 12:00:26,773 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-09-16 12:00:26,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:26,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1707777112, now seen corresponding path program 1 times [2022-09-16 12:00:26,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:26,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357850087] [2022-09-16 12:00:26,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:26,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:26,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:26,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357850087] [2022-09-16 12:00:26,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357850087] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:00:26,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690764334] [2022-09-16 12:00:26,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:26,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:00:26,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:00:26,851 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) [2022-09-16 12:00:26,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-09-16 12:00:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:26,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-16 12:00:26,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:00:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:26,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 12:00:26,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690764334] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:00:26,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-16 12:00:26,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-09-16 12:00:26,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139672336] [2022-09-16 12:00:26,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:00:26,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:00:26,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:26,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:00:26,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-09-16 12:00:26,980 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 146 [2022-09-16 12:00:26,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 171 transitions, 860 flow. Second operand has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:26,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:26,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 146 [2022-09-16 12:00:26,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:28,572 INFO L130 PetriNetUnfolder]: 6678/12073 cut-off events. [2022-09-16 12:00:28,573 INFO L131 PetriNetUnfolder]: For 25128/25212 co-relation queries the response was YES. [2022-09-16 12:00:28,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53381 conditions, 12073 events. 6678/12073 cut-off events. For 25128/25212 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 97874 event pairs, 601 based on Foata normal form. 1225/8358 useless extension candidates. Maximal degree in co-relation 17179. Up to 6889 conditions per place. [2022-09-16 12:00:28,740 INFO L137 encePairwiseOnDemand]: 127/146 looper letters, 51 selfloop transitions, 48 changer transitions 0/184 dead transitions. [2022-09-16 12:00:28,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 184 transitions, 1175 flow [2022-09-16 12:00:28,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-16 12:00:28,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-16 12:00:28,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 486 transitions. [2022-09-16 12:00:28,745 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8321917808219178 [2022-09-16 12:00:28,745 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 486 transitions. [2022-09-16 12:00:28,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 486 transitions. [2022-09-16 12:00:28,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:28,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 486 transitions. [2022-09-16 12:00:28,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:28,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:28,748 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:28,749 INFO L175 Difference]: Start difference. First operand has 128 places, 171 transitions, 860 flow. Second operand 4 states and 486 transitions. [2022-09-16 12:00:28,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 184 transitions, 1175 flow [2022-09-16 12:00:28,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 184 transitions, 1095 flow, removed 40 selfloop flow, removed 1 redundant places. [2022-09-16 12:00:28,862 INFO L231 Difference]: Finished difference. Result has 129 places, 178 transitions, 1117 flow [2022-09-16 12:00:28,863 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1117, PETRI_PLACES=129, PETRI_TRANSITIONS=178} [2022-09-16 12:00:28,864 INFO L287 CegarLoopForPetriNet]: 123 programPoint places, 6 predicate places. [2022-09-16 12:00:28,864 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 178 transitions, 1117 flow [2022-09-16 12:00:28,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:28,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:28,865 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:28,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-09-16 12:00:29,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-09-16 12:00:29,080 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-09-16 12:00:29,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:29,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1707777113, now seen corresponding path program 1 times [2022-09-16 12:00:29,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:29,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875309482] [2022-09-16 12:00:29,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:29,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:29,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:29,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875309482] [2022-09-16 12:00:29,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875309482] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:00:29,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681888302] [2022-09-16 12:00:29,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:29,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:00:29,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:00:29,133 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) [2022-09-16 12:00:29,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-09-16 12:00:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:29,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-16 12:00:29,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:00:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:29,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:00:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:29,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681888302] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:00:29,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:00:29,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-09-16 12:00:29,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239611893] [2022-09-16 12:00:29,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:00:29,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-16 12:00:29,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:29,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-16 12:00:29,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-09-16 12:00:29,347 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 146 [2022-09-16 12:00:29,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 178 transitions, 1117 flow. Second operand has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:29,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:29,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 146 [2022-09-16 12:00:29,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:33,925 INFO L130 PetriNetUnfolder]: 24346/39923 cut-off events. [2022-09-16 12:00:33,925 INFO L131 PetriNetUnfolder]: For 75329/75599 co-relation queries the response was YES. [2022-09-16 12:00:34,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198244 conditions, 39923 events. 24346/39923 cut-off events. For 75329/75599 co-relation queries the response was YES. Maximal size of possible extension queue 2688. Compared 342597 event pairs, 5634 based on Foata normal form. 86/22253 useless extension candidates. Maximal degree in co-relation 82081. Up to 18289 conditions per place. [2022-09-16 12:00:34,535 INFO L137 encePairwiseOnDemand]: 142/146 looper letters, 377 selfloop transitions, 58 changer transitions 0/518 dead transitions. [2022-09-16 12:00:34,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 518 transitions, 5386 flow [2022-09-16 12:00:34,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-16 12:00:34,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-16 12:00:34,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 891 transitions. [2022-09-16 12:00:34,538 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8718199608610567 [2022-09-16 12:00:34,538 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 891 transitions. [2022-09-16 12:00:34,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 891 transitions. [2022-09-16 12:00:34,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:34,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 891 transitions. [2022-09-16 12:00:34,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 127.28571428571429) internal successors, (891), 7 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:34,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:34,544 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:34,544 INFO L175 Difference]: Start difference. First operand has 129 places, 178 transitions, 1117 flow. Second operand 7 states and 891 transitions. [2022-09-16 12:00:34,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 518 transitions, 5386 flow [2022-09-16 12:00:35,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 518 transitions, 4837 flow, removed 274 selfloop flow, removed 1 redundant places. [2022-09-16 12:00:35,244 INFO L231 Difference]: Finished difference. Result has 137 places, 220 transitions, 1658 flow [2022-09-16 12:00:35,245 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1658, PETRI_PLACES=137, PETRI_TRANSITIONS=220} [2022-09-16 12:00:35,248 INFO L287 CegarLoopForPetriNet]: 123 programPoint places, 14 predicate places. [2022-09-16 12:00:35,248 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 220 transitions, 1658 flow [2022-09-16 12:00:35,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:35,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:35,249 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:35,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-09-16 12:00:35,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:00:35,457 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-09-16 12:00:35,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:35,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1707777114, now seen corresponding path program 1 times [2022-09-16 12:00:35,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:35,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474268851] [2022-09-16 12:00:35,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:35,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:35,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:35,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474268851] [2022-09-16 12:00:35,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474268851] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:00:35,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547887536] [2022-09-16 12:00:35,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:35,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:00:35,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:00:35,510 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) [2022-09-16 12:00:35,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-09-16 12:00:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:35,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-16 12:00:35,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:00:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:35,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 12:00:35,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547887536] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:00:35,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-16 12:00:35,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-09-16 12:00:35,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635885132] [2022-09-16 12:00:35,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:00:35,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:00:35,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:35,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:00:35,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-09-16 12:00:35,647 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 146 [2022-09-16 12:00:35,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 220 transitions, 1658 flow. Second operand has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:35,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:35,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 146 [2022-09-16 12:00:35,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:39,448 INFO L130 PetriNetUnfolder]: 22330/36500 cut-off events. [2022-09-16 12:00:39,449 INFO L131 PetriNetUnfolder]: For 69814/70205 co-relation queries the response was YES. [2022-09-16 12:00:39,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160075 conditions, 36500 events. 22330/36500 cut-off events. For 69814/70205 co-relation queries the response was YES. Maximal size of possible extension queue 2574. Compared 311748 event pairs, 5820 based on Foata normal form. 691/22084 useless extension candidates. Maximal degree in co-relation 130954. Up to 24989 conditions per place. [2022-09-16 12:00:39,876 INFO L137 encePairwiseOnDemand]: 143/146 looper letters, 161 selfloop transitions, 9 changer transitions 0/253 dead transitions. [2022-09-16 12:00:39,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 253 transitions, 2169 flow [2022-09-16 12:00:39,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-16 12:00:39,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-16 12:00:39,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 480 transitions. [2022-09-16 12:00:39,878 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.821917808219178 [2022-09-16 12:00:39,878 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 480 transitions. [2022-09-16 12:00:39,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 480 transitions. [2022-09-16 12:00:39,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:39,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 480 transitions. [2022-09-16 12:00:39,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:39,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:39,881 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:39,881 INFO L175 Difference]: Start difference. First operand has 137 places, 220 transitions, 1658 flow. Second operand 4 states and 480 transitions. [2022-09-16 12:00:39,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 253 transitions, 2169 flow [2022-09-16 12:00:40,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 253 transitions, 2118 flow, removed 21 selfloop flow, removed 1 redundant places. [2022-09-16 12:00:40,725 INFO L231 Difference]: Finished difference. Result has 137 places, 192 transitions, 1280 flow [2022-09-16 12:00:40,725 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1280, PETRI_PLACES=137, PETRI_TRANSITIONS=192} [2022-09-16 12:00:40,726 INFO L287 CegarLoopForPetriNet]: 123 programPoint places, 14 predicate places. [2022-09-16 12:00:40,726 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 192 transitions, 1280 flow [2022-09-16 12:00:40,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:40,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:40,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:40,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-09-16 12:00:40,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:00:40,928 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-09-16 12:00:40,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:40,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1876650007, now seen corresponding path program 1 times [2022-09-16 12:00:40,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:40,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241133939] [2022-09-16 12:00:40,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:40,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:40,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:40,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:40,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241133939] [2022-09-16 12:00:40,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241133939] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:00:40,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:00:40,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-16 12:00:40,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855455182] [2022-09-16 12:00:40,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:00:40,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-16 12:00:40,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:40,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-16 12:00:40,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-16 12:00:40,984 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 146 [2022-09-16 12:00:40,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 192 transitions, 1280 flow. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:40,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:40,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 146 [2022-09-16 12:00:40,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:47,737 INFO L130 PetriNetUnfolder]: 30965/53740 cut-off events. [2022-09-16 12:00:47,738 INFO L131 PetriNetUnfolder]: For 119086/119450 co-relation queries the response was YES. [2022-09-16 12:00:48,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223095 conditions, 53740 events. 30965/53740 cut-off events. For 119086/119450 co-relation queries the response was YES. Maximal size of possible extension queue 4433. Compared 531216 event pairs, 10176 based on Foata normal form. 14/34451 useless extension candidates. Maximal degree in co-relation 116824. Up to 27595 conditions per place. [2022-09-16 12:00:48,568 INFO L137 encePairwiseOnDemand]: 142/146 looper letters, 198 selfloop transitions, 5 changer transitions 0/286 dead transitions. [2022-09-16 12:00:48,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 286 transitions, 2650 flow [2022-09-16 12:00:48,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-16 12:00:48,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-16 12:00:48,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2022-09-16 12:00:48,570 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8470319634703196 [2022-09-16 12:00:48,570 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2022-09-16 12:00:48,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2022-09-16 12:00:48,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:48,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2022-09-16 12:00:48,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:48,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:48,572 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:48,572 INFO L175 Difference]: Start difference. First operand has 137 places, 192 transitions, 1280 flow. Second operand 3 states and 371 transitions. [2022-09-16 12:00:48,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 286 transitions, 2650 flow [2022-09-16 12:00:49,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 286 transitions, 2633 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-09-16 12:00:49,808 INFO L231 Difference]: Finished difference. Result has 138 places, 196 transitions, 1347 flow [2022-09-16 12:00:49,808 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1347, PETRI_PLACES=138, PETRI_TRANSITIONS=196} [2022-09-16 12:00:49,809 INFO L287 CegarLoopForPetriNet]: 123 programPoint places, 15 predicate places. [2022-09-16 12:00:49,809 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 196 transitions, 1347 flow [2022-09-16 12:00:49,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:49,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:49,810 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:49,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-09-16 12:00:49,810 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-09-16 12:00:49,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:49,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1296138837, now seen corresponding path program 2 times [2022-09-16 12:00:49,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:49,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257423591] [2022-09-16 12:00:49,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:49,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:49,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:49,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257423591] [2022-09-16 12:00:49,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257423591] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:00:49,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660253177] [2022-09-16 12:00:49,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-16 12:00:49,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:00:49,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:00:49,902 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) [2022-09-16 12:00:49,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-09-16 12:00:49,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-09-16 12:00:49,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-16 12:00:49,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 12:00:49,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:00:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-09-16 12:00:50,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:00:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-09-16 12:00:50,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660253177] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:00:50,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:00:50,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-09-16 12:00:50,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366345048] [2022-09-16 12:00:50,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:00:50,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-16 12:00:50,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:50,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-16 12:00:50,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-09-16 12:00:50,117 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 146 [2022-09-16 12:00:50,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 196 transitions, 1347 flow. Second operand has 10 states, 10 states have (on average 105.0) internal successors, (1050), 10 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:50,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:50,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 146 [2022-09-16 12:00:50,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:58,248 INFO L130 PetriNetUnfolder]: 39499/66887 cut-off events. [2022-09-16 12:00:58,248 INFO L131 PetriNetUnfolder]: For 141569/141917 co-relation queries the response was YES. [2022-09-16 12:00:58,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290862 conditions, 66887 events. 39499/66887 cut-off events. For 141569/141917 co-relation queries the response was YES. Maximal size of possible extension queue 3974. Compared 633923 event pairs, 8657 based on Foata normal form. 1067/42583 useless extension candidates. Maximal degree in co-relation 247836. Up to 19453 conditions per place. [2022-09-16 12:00:59,067 INFO L137 encePairwiseOnDemand]: 139/146 looper letters, 459 selfloop transitions, 48 changer transitions 0/584 dead transitions. [2022-09-16 12:00:59,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 584 transitions, 5851 flow [2022-09-16 12:00:59,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-09-16 12:00:59,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-09-16 12:00:59,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1284 transitions. [2022-09-16 12:00:59,071 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7995018679950187 [2022-09-16 12:00:59,071 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1284 transitions. [2022-09-16 12:00:59,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1284 transitions. [2022-09-16 12:00:59,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:59,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1284 transitions. [2022-09-16 12:00:59,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 116.72727272727273) internal successors, (1284), 11 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) [2022-09-16 12:00:59,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 146.0) internal successors, (1752), 12 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:59,078 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 146.0) internal successors, (1752), 12 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:59,078 INFO L175 Difference]: Start difference. First operand has 138 places, 196 transitions, 1347 flow. Second operand 11 states and 1284 transitions. [2022-09-16 12:00:59,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 584 transitions, 5851 flow [2022-09-16 12:01:00,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 584 transitions, 5742 flow, removed 14 selfloop flow, removed 5 redundant places. [2022-09-16 12:01:00,739 INFO L231 Difference]: Finished difference. Result has 143 places, 197 transitions, 1342 flow [2022-09-16 12:01:00,740 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1342, PETRI_PLACES=143, PETRI_TRANSITIONS=197} [2022-09-16 12:01:00,740 INFO L287 CegarLoopForPetriNet]: 123 programPoint places, 20 predicate places. [2022-09-16 12:01:00,740 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 197 transitions, 1342 flow [2022-09-16 12:01:00,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 105.0) internal successors, (1050), 10 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:01:00,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:01:00,741 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:01:00,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-09-16 12:01:00,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:01:00,942 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-09-16 12:01:00,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:01:00,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1296138839, now seen corresponding path program 2 times [2022-09-16 12:01:00,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:01:00,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63758295] [2022-09-16 12:01:00,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:01:00,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:01:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:01:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:01:01,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:01:01,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63758295] [2022-09-16 12:01:01,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63758295] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:01:01,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54344348] [2022-09-16 12:01:01,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-16 12:01:01,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:01:01,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:01:01,003 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) [2022-09-16 12:01:01,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-09-16 12:01:01,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-16 12:01:01,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-16 12:01:01,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2022-09-16 12:01:01,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:01:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:01:01,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:01:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:01:01,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54344348] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:01:01,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:01:01,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-09-16 12:01:01,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720218156] [2022-09-16 12:01:01,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:01:01,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-09-16 12:01:01,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:01:01,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-09-16 12:01:01,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-09-16 12:01:01,244 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 146 [2022-09-16 12:01:01,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 197 transitions, 1342 flow. Second operand has 13 states, 13 states have (on average 110.3076923076923) internal successors, (1434), 13 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) [2022-09-16 12:01:01,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:01:01,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 146 [2022-09-16 12:01:01,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:01:17,495 INFO L130 PetriNetUnfolder]: 62387/117513 cut-off events. [2022-09-16 12:01:17,495 INFO L131 PetriNetUnfolder]: For 358144/360040 co-relation queries the response was YES. [2022-09-16 12:01:18,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 485976 conditions, 117513 events. 62387/117513 cut-off events. For 358144/360040 co-relation queries the response was YES. Maximal size of possible extension queue 7377. Compared 1368880 event pairs, 3514 based on Foata normal form. 19047/95495 useless extension candidates. Maximal degree in co-relation 315978. Up to 34971 conditions per place. [2022-09-16 12:01:19,104 INFO L137 encePairwiseOnDemand]: 131/146 looper letters, 121 selfloop transitions, 365 changer transitions 0/572 dead transitions. [2022-09-16 12:01:19,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 572 transitions, 5768 flow [2022-09-16 12:01:19,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-09-16 12:01:19,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-09-16 12:01:19,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1530 transitions. [2022-09-16 12:01:19,108 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8732876712328768 [2022-09-16 12:01:19,108 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1530 transitions. [2022-09-16 12:01:19,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1530 transitions. [2022-09-16 12:01:19,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:01:19,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1530 transitions. [2022-09-16 12:01:19,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 127.5) internal successors, (1530), 12 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:01:19,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 146.0) internal successors, (1898), 13 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:01:19,118 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 146.0) internal successors, (1898), 13 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:01:19,118 INFO L175 Difference]: Start difference. First operand has 143 places, 197 transitions, 1342 flow. Second operand 12 states and 1530 transitions. [2022-09-16 12:01:19,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 572 transitions, 5768 flow [2022-09-16 12:01:26,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 572 transitions, 5423 flow, removed 56 selfloop flow, removed 8 redundant places. [2022-09-16 12:01:26,603 INFO L231 Difference]: Finished difference. Result has 156 places, 512 transitions, 5939 flow [2022-09-16 12:01:26,603 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5939, PETRI_PLACES=156, PETRI_TRANSITIONS=512} [2022-09-16 12:01:26,604 INFO L287 CegarLoopForPetriNet]: 123 programPoint places, 33 predicate places. [2022-09-16 12:01:26,604 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 512 transitions, 5939 flow [2022-09-16 12:01:26,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 110.3076923076923) internal successors, (1434), 13 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) [2022-09-16 12:01:26,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:01:26,605 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:01:26,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-09-16 12:01:26,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:01:26,806 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-09-16 12:01:26,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:01:26,806 INFO L85 PathProgramCache]: Analyzing trace with hash -995425239, now seen corresponding path program 1 times [2022-09-16 12:01:26,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:01:26,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586018086] [2022-09-16 12:01:26,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:01:26,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:01:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:01:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-16 12:01:26,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:01:26,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586018086] [2022-09-16 12:01:26,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586018086] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:01:26,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273175168] [2022-09-16 12:01:26,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:01:26,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:01:26,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:01:26,848 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) [2022-09-16 12:01:26,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-09-16 12:01:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:01:26,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-16 12:01:26,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:01:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-16 12:01:26,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:01:27,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-16 12:01:27,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273175168] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:01:27,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:01:27,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-09-16 12:01:27,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345404223] [2022-09-16 12:01:27,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:01:27,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-16 12:01:27,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:01:27,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-16 12:01:27,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-09-16 12:01:27,074 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 146 [2022-09-16 12:01:27,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 512 transitions, 5939 flow. Second operand has 7 states, 7 states have (on average 111.42857142857143) internal successors, (780), 7 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:01:27,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:01:27,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 146 [2022-09-16 12:01:27,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand