/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-bad-buffer-mult-alt2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-53ca081-m [2022-09-16 11:52:09,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-16 11:52:09,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-16 11:52:09,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-16 11:52:09,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-16 11:52:09,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-16 11:52:09,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-16 11:52:09,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-16 11:52:09,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-16 11:52:09,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-16 11:52:09,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-16 11:52:09,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-16 11:52:09,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-16 11:52:09,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-16 11:52:09,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-16 11:52:09,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-16 11:52:09,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-16 11:52:09,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-16 11:52:09,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-16 11:52:09,248 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-16 11:52:09,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-16 11:52:09,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-16 11:52:09,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-16 11:52:09,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-16 11:52:09,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-16 11:52:09,264 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-16 11:52:09,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-16 11:52:09,265 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-16 11:52:09,265 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-16 11:52:09,266 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-16 11:52:09,266 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-16 11:52:09,267 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-16 11:52:09,267 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-16 11:52:09,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-16 11:52:09,269 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-16 11:52:09,269 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-16 11:52:09,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-16 11:52:09,270 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-16 11:52:09,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-16 11:52:09,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-16 11:52:09,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-16 11:52:09,273 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 11:52:09,299 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-16 11:52:09,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-16 11:52:09,301 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-16 11:52:09,301 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-16 11:52:09,301 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-16 11:52:09,301 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-16 11:52:09,301 INFO L138 SettingsManager]: * Use SBE=true [2022-09-16 11:52:09,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-16 11:52:09,302 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-16 11:52:09,302 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-16 11:52:09,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-16 11:52:09,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-16 11:52:09,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-16 11:52:09,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-16 11:52:09,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-16 11:52:09,304 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-16 11:52:09,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-16 11:52:09,304 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-16 11:52:09,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-16 11:52:09,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-16 11:52:09,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-16 11:52:09,304 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-16 11:52:09,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-16 11:52:09,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-16 11:52:09,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-16 11:52:09,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-16 11:52:09,307 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-16 11:52:09,307 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-16 11:52:09,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-16 11:52:09,307 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-16 11:52:09,307 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-16 11:52:09,308 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of error function in SV-COMP mode -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2022-09-16 11:52:09,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-16 11:52:09,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-16 11:52:09,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-16 11:52:09,638 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-16 11:52:09,639 INFO L275 PluginConnector]: CDTParser initialized [2022-09-16 11:52:09,640 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-09-16 11:52:09,723 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5324e079b/196d2e79fc624f04a07ea867b71f57a8/FLAGc30251646 [2022-09-16 11:52:10,200 INFO L306 CDTParser]: Found 1 translation units. [2022-09-16 11:52:10,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-09-16 11:52:10,232 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5324e079b/196d2e79fc624f04a07ea867b71f57a8/FLAGc30251646 [2022-09-16 11:52:10,730 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5324e079b/196d2e79fc624f04a07ea867b71f57a8 [2022-09-16 11:52:10,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-16 11:52:10,736 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-16 11:52:10,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-16 11:52:10,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-16 11:52:10,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-16 11:52:10,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 11:52:10" (1/1) ... [2022-09-16 11:52:10,744 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e6464f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:52:10, skipping insertion in model container [2022-09-16 11:52:10,745 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 11:52:10" (1/1) ... [2022-09-16 11:52:10,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-16 11:52:10,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-16 11:52:11,063 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-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-09-16 11:52:11,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-16 11:52:11,077 INFO L203 MainTranslator]: Completed pre-run [2022-09-16 11:52:11,099 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-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-09-16 11:52:11,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-16 11:52:11,114 INFO L208 MainTranslator]: Completed translation [2022-09-16 11:52:11,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:52:11 WrapperNode [2022-09-16 11:52:11,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-16 11:52:11,116 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-16 11:52:11,116 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-16 11:52:11,116 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-16 11:52:11,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:52:11" (1/1) ... [2022-09-16 11:52:11,129 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:52:11" (1/1) ... [2022-09-16 11:52:11,151 INFO L138 Inliner]: procedures = 26, calls = 75, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 361 [2022-09-16 11:52:11,152 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-16 11:52:11,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-16 11:52:11,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-16 11:52:11,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-16 11:52:11,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:52:11" (1/1) ... [2022-09-16 11:52:11,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:52:11" (1/1) ... [2022-09-16 11:52:11,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:52:11" (1/1) ... [2022-09-16 11:52:11,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:52:11" (1/1) ... [2022-09-16 11:52:11,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:52:11" (1/1) ... [2022-09-16 11:52:11,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:52:11" (1/1) ... [2022-09-16 11:52:11,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:52:11" (1/1) ... [2022-09-16 11:52:11,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-16 11:52:11,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-16 11:52:11,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-16 11:52:11,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-16 11:52:11,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:52:11" (1/1) ... [2022-09-16 11:52:11,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-16 11:52:11,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:52:11,266 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 11:52:11,273 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 11:52:11,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-16 11:52:11,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-16 11:52:11,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-16 11:52:11,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-16 11:52:11,308 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-09-16 11:52:11,309 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-09-16 11:52:11,309 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-09-16 11:52:11,309 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-09-16 11:52:11,309 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-09-16 11:52:11,309 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-09-16 11:52:11,309 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-09-16 11:52:11,310 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-09-16 11:52:11,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-16 11:52:11,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-09-16 11:52:11,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-09-16 11:52:11,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-09-16 11:52:11,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-16 11:52:11,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-16 11:52:11,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-16 11:52:11,312 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 11:52:11,494 INFO L234 CfgBuilder]: Building ICFG [2022-09-16 11:52:11,497 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-16 11:52:11,991 INFO L275 CfgBuilder]: Performing block encoding [2022-09-16 11:52:12,428 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-16 11:52:12,428 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-09-16 11:52:12,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 11:52:12 BoogieIcfgContainer [2022-09-16 11:52:12,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-16 11:52:12,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-16 11:52:12,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-16 11:52:12,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-16 11:52:12,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 11:52:10" (1/3) ... [2022-09-16 11:52:12,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a085fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 11:52:12, skipping insertion in model container [2022-09-16 11:52:12,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:52:11" (2/3) ... [2022-09-16 11:52:12,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a085fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 11:52:12, skipping insertion in model container [2022-09-16 11:52:12,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 11:52:12" (3/3) ... [2022-09-16 11:52:12,438 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2022-09-16 11:52:12,455 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-16 11:52:12,455 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-09-16 11:52:12,455 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-16 11:52:12,610 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-09-16 11:52:12,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 278 transitions, 588 flow [2022-09-16 11:52:12,783 INFO L130 PetriNetUnfolder]: 19/274 cut-off events. [2022-09-16 11:52:12,783 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-09-16 11:52:12,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 274 events. 19/274 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 284 event pairs, 0 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 228. Up to 2 conditions per place. [2022-09-16 11:52:12,791 INFO L82 GeneralOperation]: Start removeDead. Operand has 272 places, 278 transitions, 588 flow [2022-09-16 11:52:12,798 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 246 places, 251 transitions, 523 flow [2022-09-16 11:52:12,807 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-16 11:52:12,813 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;@16de3715, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-16 11:52:12,814 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2022-09-16 11:52:12,836 INFO L130 PetriNetUnfolder]: 3/93 cut-off events. [2022-09-16 11:52:12,837 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-16 11:52:12,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:52:12,838 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, 1, 1, 1, 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 11:52:12,838 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2022-09-16 11:52:12,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:52:12,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1971124914, now seen corresponding path program 1 times [2022-09-16 11:52:12,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:52:12,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401594258] [2022-09-16 11:52:12,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:52:12,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:52:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:52:13,206 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 11:52:13,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:52:13,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401594258] [2022-09-16 11:52:13,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401594258] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:52:13,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:52:13,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 11:52:13,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384151268] [2022-09-16 11:52:13,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:52:13,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 11:52:13,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:52:13,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 11:52:13,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 11:52:13,255 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 278 [2022-09-16 11:52:13,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 251 transitions, 523 flow. Second operand has 4 states, 4 states have (on average 203.5) internal successors, (814), 4 states have internal predecessors, (814), 0 states have call successors, (0), 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 11:52:13,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:52:13,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 278 [2022-09-16 11:52:13,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:52:20,543 INFO L130 PetriNetUnfolder]: 23681/32789 cut-off events. [2022-09-16 11:52:20,544 INFO L131 PetriNetUnfolder]: For 5368/5376 co-relation queries the response was YES. [2022-09-16 11:52:20,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64044 conditions, 32789 events. 23681/32789 cut-off events. For 5368/5376 co-relation queries the response was YES. Maximal size of possible extension queue 1708. Compared 197510 event pairs, 11436 based on Foata normal form. 4924/15201 useless extension candidates. Maximal degree in co-relation 31432. Up to 14260 conditions per place. [2022-09-16 11:52:20,758 INFO L137 encePairwiseOnDemand]: 245/278 looper letters, 90 selfloop transitions, 9 changer transitions 6/277 dead transitions. [2022-09-16 11:52:20,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 277 transitions, 794 flow [2022-09-16 11:52:20,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 11:52:20,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 11:52:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1149 transitions. [2022-09-16 11:52:20,773 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8266187050359712 [2022-09-16 11:52:20,774 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1149 transitions. [2022-09-16 11:52:20,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1149 transitions. [2022-09-16 11:52:20,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:52:20,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1149 transitions. [2022-09-16 11:52:20,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 229.8) internal successors, (1149), 5 states have internal predecessors, (1149), 0 states have call successors, (0), 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 11:52:20,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 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 11:52:20,794 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 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 11:52:20,796 INFO L175 Difference]: Start difference. First operand has 246 places, 251 transitions, 523 flow. Second operand 5 states and 1149 transitions. [2022-09-16 11:52:20,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 277 transitions, 794 flow [2022-09-16 11:52:20,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 277 transitions, 768 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-09-16 11:52:20,823 INFO L231 Difference]: Finished difference. Result has 238 places, 232 transitions, 525 flow [2022-09-16 11:52:20,824 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=525, PETRI_PLACES=238, PETRI_TRANSITIONS=232} [2022-09-16 11:52:20,827 INFO L287 CegarLoopForPetriNet]: 246 programPoint places, -8 predicate places. [2022-09-16 11:52:20,827 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 232 transitions, 525 flow [2022-09-16 11:52:20,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 203.5) internal successors, (814), 4 states have internal predecessors, (814), 0 states have call successors, (0), 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 11:52:20,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:52:20,828 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 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 11:52:20,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-16 11:52:20,829 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2022-09-16 11:52:20,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:52:20,830 INFO L85 PathProgramCache]: Analyzing trace with hash 961121185, now seen corresponding path program 1 times [2022-09-16 11:52:20,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:52:20,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48175870] [2022-09-16 11:52:20,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:52:20,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:52:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:52:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:52:20,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:52:20,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48175870] [2022-09-16 11:52:20,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48175870] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:52:20,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701403237] [2022-09-16 11:52:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:52:20,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:52:20,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:52:20,944 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 11:52:20,945 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 11:52:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:52:21,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 11:52:21,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:52:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:52:21,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:52:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:52:21,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701403237] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:52:21,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 11:52:21,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-09-16 11:52:21,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763544448] [2022-09-16 11:52:21,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 11:52:21,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-09-16 11:52:21,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:52:21,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-09-16 11:52:21,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-09-16 11:52:21,239 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 278 [2022-09-16 11:52:21,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 232 transitions, 525 flow. Second operand has 12 states, 12 states have (on average 204.66666666666666) internal successors, (2456), 12 states have internal predecessors, (2456), 0 states have call successors, (0), 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 11:52:21,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:52:21,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 278 [2022-09-16 11:52:21,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:52:34,585 INFO L130 PetriNetUnfolder]: 59201/81808 cut-off events. [2022-09-16 11:52:34,585 INFO L131 PetriNetUnfolder]: For 4017/4037 co-relation queries the response was YES. [2022-09-16 11:52:34,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155787 conditions, 81808 events. 59201/81808 cut-off events. For 4017/4037 co-relation queries the response was YES. Maximal size of possible extension queue 1946. Compared 514860 event pairs, 28590 based on Foata normal form. 6/25564 useless extension candidates. Maximal degree in co-relation 124404. Up to 14253 conditions per place. [2022-09-16 11:52:35,267 INFO L137 encePairwiseOnDemand]: 263/278 looper letters, 201 selfloop transitions, 40 changer transitions 0/413 dead transitions. [2022-09-16 11:52:35,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 413 transitions, 1451 flow [2022-09-16 11:52:35,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-09-16 11:52:35,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-09-16 11:52:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3883 transitions. [2022-09-16 11:52:35,273 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7759792166266987 [2022-09-16 11:52:35,274 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3883 transitions. [2022-09-16 11:52:35,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3883 transitions. [2022-09-16 11:52:35,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:52:35,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3883 transitions. [2022-09-16 11:52:35,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 215.72222222222223) internal successors, (3883), 18 states have internal predecessors, (3883), 0 states have call successors, (0), 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 11:52:35,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 278.0) internal successors, (5282), 19 states have internal predecessors, (5282), 0 states have call successors, (0), 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 11:52:35,293 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 278.0) internal successors, (5282), 19 states have internal predecessors, (5282), 0 states have call successors, (0), 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 11:52:35,293 INFO L175 Difference]: Start difference. First operand has 238 places, 232 transitions, 525 flow. Second operand 18 states and 3883 transitions. [2022-09-16 11:52:35,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 413 transitions, 1451 flow [2022-09-16 11:52:35,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 413 transitions, 1446 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 11:52:35,302 INFO L231 Difference]: Finished difference. Result has 252 places, 259 transitions, 758 flow [2022-09-16 11:52:35,303 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=758, PETRI_PLACES=252, PETRI_TRANSITIONS=259} [2022-09-16 11:52:35,303 INFO L287 CegarLoopForPetriNet]: 246 programPoint places, 6 predicate places. [2022-09-16 11:52:35,303 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 259 transitions, 758 flow [2022-09-16 11:52:35,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 204.66666666666666) internal successors, (2456), 12 states have internal predecessors, (2456), 0 states have call successors, (0), 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 11:52:35,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:52:35,305 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 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 11:52:35,331 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 11:52:35,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:52:35,528 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2022-09-16 11:52:35,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:52:35,528 INFO L85 PathProgramCache]: Analyzing trace with hash -270013192, now seen corresponding path program 1 times [2022-09-16 11:52:35,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:52:35,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939058792] [2022-09-16 11:52:35,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:52:35,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:52:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:52:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:52:35,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:52:35,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939058792] [2022-09-16 11:52:35,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939058792] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:52:35,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768567071] [2022-09-16 11:52:35,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:52:35,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:52:35,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:52:35,632 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 11:52:35,633 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 11:52:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:52:35,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 11:52:35,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:52:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:52:36,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:52:36,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768567071] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:52:36,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-16 11:52:36,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-09-16 11:52:36,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464602471] [2022-09-16 11:52:36,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:52:36,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-16 11:52:36,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:52:36,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-16 11:52:36,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-09-16 11:52:36,033 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 278 [2022-09-16 11:52:36,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 259 transitions, 758 flow. Second operand has 6 states, 6 states have (on average 204.33333333333334) internal successors, (1226), 6 states have internal predecessors, (1226), 0 states have call successors, (0), 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 11:52:36,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:52:36,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 278 [2022-09-16 11:52:36,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:52:49,195 INFO L130 PetriNetUnfolder]: 59201/81800 cut-off events. [2022-09-16 11:52:49,195 INFO L131 PetriNetUnfolder]: For 4111/4131 co-relation queries the response was YES. [2022-09-16 11:52:49,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155824 conditions, 81800 events. 59201/81800 cut-off events. For 4111/4131 co-relation queries the response was YES. Maximal size of possible extension queue 1871. Compared 512764 event pairs, 28590 based on Foata normal form. 8/25558 useless extension candidates. Maximal degree in co-relation 124634. Up to 56968 conditions per place. [2022-09-16 11:52:50,154 INFO L137 encePairwiseOnDemand]: 267/278 looper letters, 91 selfloop transitions, 27 changer transitions 0/290 dead transitions. [2022-09-16 11:52:50,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 290 transitions, 1030 flow [2022-09-16 11:52:50,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-16 11:52:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-16 11:52:50,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1513 transitions. [2022-09-16 11:52:50,157 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7774922918807811 [2022-09-16 11:52:50,158 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1513 transitions. [2022-09-16 11:52:50,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1513 transitions. [2022-09-16 11:52:50,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:52:50,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1513 transitions. [2022-09-16 11:52:50,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 216.14285714285714) internal successors, (1513), 7 states have internal predecessors, (1513), 0 states have call successors, (0), 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 11:52:50,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 278.0) internal successors, (2224), 8 states have internal predecessors, (2224), 0 states have call successors, (0), 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 11:52:50,163 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 278.0) internal successors, (2224), 8 states have internal predecessors, (2224), 0 states have call successors, (0), 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 11:52:50,164 INFO L175 Difference]: Start difference. First operand has 252 places, 259 transitions, 758 flow. Second operand 7 states and 1513 transitions. [2022-09-16 11:52:50,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 290 transitions, 1030 flow [2022-09-16 11:52:50,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 290 transitions, 956 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-09-16 11:52:50,170 INFO L231 Difference]: Finished difference. Result has 247 places, 251 transitions, 684 flow [2022-09-16 11:52:50,170 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=684, PETRI_PLACES=247, PETRI_TRANSITIONS=251} [2022-09-16 11:52:50,171 INFO L287 CegarLoopForPetriNet]: 246 programPoint places, 1 predicate places. [2022-09-16 11:52:50,171 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 251 transitions, 684 flow [2022-09-16 11:52:50,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 204.33333333333334) internal successors, (1226), 6 states have internal predecessors, (1226), 0 states have call successors, (0), 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 11:52:50,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:52:50,172 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 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 11:52:50,206 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 11:52:50,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-09-16 11:52:50,388 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2022-09-16 11:52:50,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:52:50,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1056392078, now seen corresponding path program 2 times [2022-09-16 11:52:50,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:52:50,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242354972] [2022-09-16 11:52:50,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:52:50,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:52:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:52:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:52:50,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:52:50,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242354972] [2022-09-16 11:52:50,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242354972] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:52:50,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225193597] [2022-09-16 11:52:50,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-16 11:52:50,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:52:50,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:52:50,500 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 11:52:50,500 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 11:52:50,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-09-16 11:52:50,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-16 11:52:50,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 7 conjunts are in the unsatisfiable core [2022-09-16 11:52:50,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:52:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-09-16 11:52:50,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:52:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-09-16 11:52:50,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225193597] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:52:50,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 11:52:50,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-09-16 11:52:50,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100931943] [2022-09-16 11:52:50,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 11:52:50,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-16 11:52:50,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:52:50,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-16 11:52:50,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-09-16 11:52:50,897 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 278 [2022-09-16 11:52:50,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 251 transitions, 684 flow. Second operand has 18 states, 18 states have (on average 190.61111111111111) internal successors, (3431), 18 states have internal predecessors, (3431), 0 states have call successors, (0), 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 11:52:50,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:52:50,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 278 [2022-09-16 11:52:50,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:53:04,485 INFO L130 PetriNetUnfolder]: 58255/82428 cut-off events. [2022-09-16 11:53:04,486 INFO L131 PetriNetUnfolder]: For 4942/4963 co-relation queries the response was YES. [2022-09-16 11:53:04,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155523 conditions, 82428 events. 58255/82428 cut-off events. For 4942/4963 co-relation queries the response was YES. Maximal size of possible extension queue 1378. Compared 527154 event pairs, 27909 based on Foata normal form. 4/28805 useless extension candidates. Maximal degree in co-relation 132984. Up to 10056 conditions per place. [2022-09-16 11:53:05,358 INFO L137 encePairwiseOnDemand]: 256/278 looper letters, 261 selfloop transitions, 65 changer transitions 0/483 dead transitions. [2022-09-16 11:53:05,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 483 transitions, 1907 flow [2022-09-16 11:53:05,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-09-16 11:53:05,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-09-16 11:53:05,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 9507 transitions. [2022-09-16 11:53:05,379 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6979151372779328 [2022-09-16 11:53:05,379 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 9507 transitions. [2022-09-16 11:53:05,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 9507 transitions. [2022-09-16 11:53:05,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:53:05,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 9507 transitions. [2022-09-16 11:53:05,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 194.0204081632653) internal successors, (9507), 49 states have internal predecessors, (9507), 0 states have call successors, (0), 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 11:53:05,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 278.0) internal successors, (13900), 50 states have internal predecessors, (13900), 0 states have call successors, (0), 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 11:53:05,426 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 278.0) internal successors, (13900), 50 states have internal predecessors, (13900), 0 states have call successors, (0), 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 11:53:05,427 INFO L175 Difference]: Start difference. First operand has 247 places, 251 transitions, 684 flow. Second operand 49 states and 9507 transitions. [2022-09-16 11:53:05,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 483 transitions, 1907 flow [2022-09-16 11:53:05,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 483 transitions, 1864 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-09-16 11:53:05,434 INFO L231 Difference]: Finished difference. Result has 291 places, 274 transitions, 895 flow [2022-09-16 11:53:05,434 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=895, PETRI_PLACES=291, PETRI_TRANSITIONS=274} [2022-09-16 11:53:05,435 INFO L287 CegarLoopForPetriNet]: 246 programPoint places, 45 predicate places. [2022-09-16 11:53:05,435 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 274 transitions, 895 flow [2022-09-16 11:53:05,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 190.61111111111111) internal successors, (3431), 18 states have internal predecessors, (3431), 0 states have call successors, (0), 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 11:53:05,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:53:05,437 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:05,457 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 11:53:05,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:53:05,655 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2022-09-16 11:53:05,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:53:05,656 INFO L85 PathProgramCache]: Analyzing trace with hash -552023126, now seen corresponding path program 1 times [2022-09-16 11:53:05,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:53:05,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816257101] [2022-09-16 11:53:05,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:53:05,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:53:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:53:05,747 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 11:53:05,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:53:05,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816257101] [2022-09-16 11:53:05,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816257101] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:53:05,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:53:05,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-16 11:53:05,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285404250] [2022-09-16 11:53:05,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:53:05,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-16 11:53:05,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:53:05,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-16 11:53:05,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-16 11:53:05,749 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 278 [2022-09-16 11:53:05,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 274 transitions, 895 flow. Second operand has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 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 11:53:05,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:53:05,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 278 [2022-09-16 11:53:05,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:53:26,715 INFO L130 PetriNetUnfolder]: 78919/118282 cut-off events. [2022-09-16 11:53:26,719 INFO L131 PetriNetUnfolder]: For 6424/6424 co-relation queries the response was YES. [2022-09-16 11:53:27,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224201 conditions, 118282 events. 78919/118282 cut-off events. For 6424/6424 co-relation queries the response was YES. Maximal size of possible extension queue 2072. Compared 974864 event pairs, 51240 based on Foata normal form. 0/49416 useless extension candidates. Maximal degree in co-relation 223903. Up to 66179 conditions per place. [2022-09-16 11:53:27,767 INFO L137 encePairwiseOnDemand]: 274/278 looper letters, 56 selfloop transitions, 2 changer transitions 0/300 dead transitions. [2022-09-16 11:53:27,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 300 transitions, 1070 flow [2022-09-16 11:53:27,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-16 11:53:27,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-16 11:53:27,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 723 transitions. [2022-09-16 11:53:27,769 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8669064748201439 [2022-09-16 11:53:27,769 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 723 transitions. [2022-09-16 11:53:27,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 723 transitions. [2022-09-16 11:53:27,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:53:27,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 723 transitions. [2022-09-16 11:53:27,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 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 11:53:27,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 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 11:53:27,772 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 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 11:53:27,772 INFO L175 Difference]: Start difference. First operand has 291 places, 274 transitions, 895 flow. Second operand 3 states and 723 transitions. [2022-09-16 11:53:27,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 300 transitions, 1070 flow [2022-09-16 11:53:27,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 300 transitions, 987 flow, removed 9 selfloop flow, removed 15 redundant places. [2022-09-16 11:53:27,778 INFO L231 Difference]: Finished difference. Result has 279 places, 275 transitions, 826 flow [2022-09-16 11:53:27,778 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=826, PETRI_PLACES=279, PETRI_TRANSITIONS=275} [2022-09-16 11:53:27,779 INFO L287 CegarLoopForPetriNet]: 246 programPoint places, 33 predicate places. [2022-09-16 11:53:27,779 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 275 transitions, 826 flow [2022-09-16 11:53:27,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 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 11:53:27,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:53:27,780 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:27,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-09-16 11:53:27,780 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2022-09-16 11:53:27,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:53:27,780 INFO L85 PathProgramCache]: Analyzing trace with hash 110017097, now seen corresponding path program 1 times [2022-09-16 11:53:27,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:53:27,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613044653] [2022-09-16 11:53:27,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:53:27,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:53:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:53:27,824 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 11:53:27,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:53:27,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613044653] [2022-09-16 11:53:27,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613044653] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:53:27,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184720795] [2022-09-16 11:53:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:53:27,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:53:27,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:53:27,826 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 11:53:27,827 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 11:53:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:53:27,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-16 11:53:27,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:53:28,081 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 11:53:28,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:53:28,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184720795] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:53:28,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-16 11:53:28,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-09-16 11:53:28,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070687872] [2022-09-16 11:53:28,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:53:28,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 11:53:28,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:53:28,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 11:53:28,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-09-16 11:53:28,085 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 278 [2022-09-16 11:53:28,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 275 transitions, 826 flow. Second operand has 4 states, 4 states have (on average 222.5) internal successors, (890), 4 states have internal predecessors, (890), 0 states have call successors, (0), 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 11:53:28,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:53:28,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 278 [2022-09-16 11:53:28,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:53:45,155 INFO L130 PetriNetUnfolder]: 68958/112199 cut-off events. [2022-09-16 11:53:45,155 INFO L131 PetriNetUnfolder]: For 11959/11959 co-relation queries the response was YES. [2022-09-16 11:53:45,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215792 conditions, 112199 events. 68958/112199 cut-off events. For 11959/11959 co-relation queries the response was YES. Maximal size of possible extension queue 1901. Compared 991248 event pairs, 18417 based on Foata normal form. 0/53987 useless extension candidates. Maximal degree in co-relation 215516. Up to 53431 conditions per place. [2022-09-16 11:53:46,181 INFO L137 encePairwiseOnDemand]: 275/278 looper letters, 55 selfloop transitions, 2 changer transitions 0/299 dead transitions. [2022-09-16 11:53:46,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 299 transitions, 993 flow [2022-09-16 11:53:46,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-16 11:53:46,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-16 11:53:46,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 942 transitions. [2022-09-16 11:53:46,200 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8471223021582733 [2022-09-16 11:53:46,200 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 942 transitions. [2022-09-16 11:53:46,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 942 transitions. [2022-09-16 11:53:46,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:53:46,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 942 transitions. [2022-09-16 11:53:46,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 235.5) internal successors, (942), 4 states have internal predecessors, (942), 0 states have call successors, (0), 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 11:53:46,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 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 11:53:46,204 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 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 11:53:46,204 INFO L175 Difference]: Start difference. First operand has 279 places, 275 transitions, 826 flow. Second operand 4 states and 942 transitions. [2022-09-16 11:53:46,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 299 transitions, 993 flow [2022-09-16 11:53:46,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 299 transitions, 991 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 11:53:46,221 INFO L231 Difference]: Finished difference. Result has 280 places, 274 transitions, 824 flow [2022-09-16 11:53:46,222 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=824, PETRI_PLACES=280, PETRI_TRANSITIONS=274} [2022-09-16 11:53:46,222 INFO L287 CegarLoopForPetriNet]: 246 programPoint places, 34 predicate places. [2022-09-16 11:53:46,222 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 274 transitions, 824 flow [2022-09-16 11:53:46,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.5) internal successors, (890), 4 states have internal predecessors, (890), 0 states have call successors, (0), 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 11:53:46,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:53:46,223 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:46,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-09-16 11:53:46,440 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 11:53:46,440 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2022-09-16 11:53:46,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:53:46,441 INFO L85 PathProgramCache]: Analyzing trace with hash 110017096, now seen corresponding path program 1 times [2022-09-16 11:53:46,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:53:46,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842345692] [2022-09-16 11:53:46,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:53:46,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:53:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:53:46,501 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 11:53:46,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:53:46,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842345692] [2022-09-16 11:53:46,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842345692] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:53:46,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105338373] [2022-09-16 11:53:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:53:46,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:53:46,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:53:46,518 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 11:53:46,532 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 11:53:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:53:46,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-16 11:53:46,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:53:46,795 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 11:53:46,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:53:46,926 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 11:53:46,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105338373] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:53:46,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 11:53:46,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-09-16 11:53:46,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19200153] [2022-09-16 11:53:46,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 11:53:46,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-16 11:53:46,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:53:46,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-16 11:53:46,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-09-16 11:53:46,928 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 278 [2022-09-16 11:53:46,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 274 transitions, 824 flow. Second operand has 7 states, 7 states have (on average 223.28571428571428) internal successors, (1563), 7 states have internal predecessors, (1563), 0 states have call successors, (0), 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 11:53:46,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:53:46,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 278 [2022-09-16 11:53:46,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand