/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/loop-tiling-eq.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-53ca081-m [2022-09-16 11:47:44,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-16 11:47:44,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-16 11:47:44,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-16 11:47:44,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-16 11:47:44,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-16 11:47:44,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-16 11:47:44,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-16 11:47:44,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-16 11:47:44,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-16 11:47:44,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-16 11:47:44,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-16 11:47:44,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-16 11:47:44,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-16 11:47:44,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-16 11:47:44,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-16 11:47:44,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-16 11:47:44,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-16 11:47:44,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-16 11:47:44,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-16 11:47:44,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-16 11:47:44,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-16 11:47:44,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-16 11:47:44,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-16 11:47:44,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-16 11:47:44,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-16 11:47:44,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-16 11:47:44,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-16 11:47:44,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-16 11:47:44,225 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-16 11:47:44,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-16 11:47:44,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-16 11:47:44,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-16 11:47:44,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-16 11:47:44,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-16 11:47:44,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-16 11:47:44,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-16 11:47:44,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-16 11:47:44,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-16 11:47:44,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-16 11:47:44,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-16 11:47:44,234 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 11:47:44,268 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-16 11:47:44,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-16 11:47:44,270 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-16 11:47:44,270 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-16 11:47:44,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-16 11:47:44,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-16 11:47:44,271 INFO L138 SettingsManager]: * Use SBE=true [2022-09-16 11:47:44,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-16 11:47:44,271 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-16 11:47:44,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-16 11:47:44,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-16 11:47:44,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-16 11:47:44,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-16 11:47:44,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-16 11:47:44,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-16 11:47:44,272 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-16 11:47:44,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-16 11:47:44,272 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-16 11:47:44,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-16 11:47:44,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-16 11:47:44,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-16 11:47:44,272 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-16 11:47:44,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-16 11:47:44,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-16 11:47:44,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-16 11:47:44,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-16 11:47:44,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-16 11:47:44,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-16 11:47:44,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-16 11:47:44,273 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-16 11:47:44,274 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-16 11:47:44,274 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of error function in SV-COMP mode -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2022-09-16 11:47:44,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-16 11:47:44,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-16 11:47:44,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-16 11:47:44,549 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-16 11:47:44,555 INFO L275 PluginConnector]: CDTParser initialized [2022-09-16 11:47:44,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/loop-tiling-eq.wvr.c [2022-09-16 11:47:44,612 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea2eb6865/e77a17f553324754ac17cb69fa607256/FLAG698e95e3a [2022-09-16 11:47:45,038 INFO L306 CDTParser]: Found 1 translation units. [2022-09-16 11:47:45,039 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/loop-tiling-eq.wvr.c [2022-09-16 11:47:45,044 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea2eb6865/e77a17f553324754ac17cb69fa607256/FLAG698e95e3a [2022-09-16 11:47:45,419 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea2eb6865/e77a17f553324754ac17cb69fa607256 [2022-09-16 11:47:45,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-16 11:47:45,423 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-16 11:47:45,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-16 11:47:45,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-16 11:47:45,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-16 11:47:45,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 11:47:45" (1/1) ... [2022-09-16 11:47:45,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30c3c33d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:47:45, skipping insertion in model container [2022-09-16 11:47:45,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 11:47:45" (1/1) ... [2022-09-16 11:47:45,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-16 11:47:45,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-16 11:47:45,634 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/loop-tiling-eq.wvr.c[2618,2631] [2022-09-16 11:47:45,638 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-16 11:47:45,646 INFO L203 MainTranslator]: Completed pre-run [2022-09-16 11:47:45,665 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/loop-tiling-eq.wvr.c[2618,2631] [2022-09-16 11:47:45,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-16 11:47:45,679 INFO L208 MainTranslator]: Completed translation [2022-09-16 11:47:45,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:47:45 WrapperNode [2022-09-16 11:47:45,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-16 11:47:45,681 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-16 11:47:45,681 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-16 11:47:45,681 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-16 11:47:45,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:47:45" (1/1) ... [2022-09-16 11:47:45,695 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:47:45" (1/1) ... [2022-09-16 11:47:45,722 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 206 [2022-09-16 11:47:45,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-16 11:47:45,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-16 11:47:45,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-16 11:47:45,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-16 11:47:45,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:47:45" (1/1) ... [2022-09-16 11:47:45,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:47:45" (1/1) ... [2022-09-16 11:47:45,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:47:45" (1/1) ... [2022-09-16 11:47:45,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:47:45" (1/1) ... [2022-09-16 11:47:45,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:47:45" (1/1) ... [2022-09-16 11:47:45,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:47:45" (1/1) ... [2022-09-16 11:47:45,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:47:45" (1/1) ... [2022-09-16 11:47:45,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-16 11:47:45,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-16 11:47:45,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-16 11:47:45,785 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-16 11:47:45,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:47:45" (1/1) ... [2022-09-16 11:47:45,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-16 11:47:45,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:47:45,822 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 11:47:45,833 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 11:47:45,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-16 11:47:45,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-09-16 11:47:45,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-16 11:47:45,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-16 11:47:45,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-16 11:47:45,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-09-16 11:47:45,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-09-16 11:47:45,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-09-16 11:47:45,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-09-16 11:47:45,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-09-16 11:47:45,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-16 11:47:45,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-09-16 11:47:45,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-16 11:47:45,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-16 11:47:45,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-16 11:47:45,863 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 11:47:46,042 INFO L234 CfgBuilder]: Building ICFG [2022-09-16 11:47:46,045 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-16 11:47:46,576 INFO L275 CfgBuilder]: Performing block encoding [2022-09-16 11:47:46,586 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-16 11:47:46,587 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-09-16 11:47:46,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 11:47:46 BoogieIcfgContainer [2022-09-16 11:47:46,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-16 11:47:46,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-16 11:47:46,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-16 11:47:46,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-16 11:47:46,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 11:47:45" (1/3) ... [2022-09-16 11:47:46,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b3691e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 11:47:46, skipping insertion in model container [2022-09-16 11:47:46,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:47:45" (2/3) ... [2022-09-16 11:47:46,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b3691e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 11:47:46, skipping insertion in model container [2022-09-16 11:47:46,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 11:47:46" (3/3) ... [2022-09-16 11:47:46,598 INFO L112 eAbstractionObserver]: Analyzing ICFG loop-tiling-eq.wvr.c [2022-09-16 11:47:46,617 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-16 11:47:46,618 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-09-16 11:47:46,618 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-16 11:47:46,719 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-09-16 11:47:46,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 315 places, 335 transitions, 686 flow [2022-09-16 11:47:46,857 INFO L130 PetriNetUnfolder]: 27/333 cut-off events. [2022-09-16 11:47:46,857 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-09-16 11:47:46,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 333 events. 27/333 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 458 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 244. Up to 2 conditions per place. [2022-09-16 11:47:46,864 INFO L82 GeneralOperation]: Start removeDead. Operand has 315 places, 335 transitions, 686 flow [2022-09-16 11:47:46,878 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 290 places, 309 transitions, 630 flow [2022-09-16 11:47:46,896 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-16 11:47:46,904 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;@809b890, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-16 11:47:46,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2022-09-16 11:47:46,925 INFO L130 PetriNetUnfolder]: 2/48 cut-off events. [2022-09-16 11:47:46,925 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-16 11:47:46,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:47:46,926 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] [2022-09-16 11:47:46,926 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:47:46,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:47:46,932 INFO L85 PathProgramCache]: Analyzing trace with hash 774557976, now seen corresponding path program 1 times [2022-09-16 11:47:46,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:47:46,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530528095] [2022-09-16 11:47:46,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:47:46,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:47:47,055 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:47:47,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673311115] [2022-09-16 11:47:47,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:47:47,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:47:47,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:47:47,063 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 11:47:47,090 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 11:47:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:47:47,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-16 11:47:47,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:47:47,384 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 11:47:47,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:47:47,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:47:47,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530528095] [2022-09-16 11:47:47,385 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:47:47,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673311115] [2022-09-16 11:47:47,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673311115] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:47:47,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:47:47,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-09-16 11:47:47,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659167421] [2022-09-16 11:47:47,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:47:47,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-16 11:47:47,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:47:47,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-16 11:47:47,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-09-16 11:47:47,484 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 335 [2022-09-16 11:47:47,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 309 transitions, 630 flow. Second operand has 7 states, 7 states have (on average 231.0) internal successors, (1617), 7 states have internal predecessors, (1617), 0 states have call successors, (0), 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 11:47:47,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:47:47,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 335 [2022-09-16 11:47:47,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:47:48,141 INFO L130 PetriNetUnfolder]: 26/606 cut-off events. [2022-09-16 11:47:48,141 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-09-16 11:47:48,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 777 conditions, 606 events. 26/606 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2231 event pairs, 4 based on Foata normal form. 38/537 useless extension candidates. Maximal degree in co-relation 525. Up to 67 conditions per place. [2022-09-16 11:47:48,149 INFO L137 encePairwiseOnDemand]: 302/335 looper letters, 104 selfloop transitions, 15 changer transitions 20/349 dead transitions. [2022-09-16 11:47:48,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 349 transitions, 1000 flow [2022-09-16 11:47:48,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-09-16 11:47:48,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-09-16 11:47:48,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3152 transitions. [2022-09-16 11:47:48,175 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7237657864523536 [2022-09-16 11:47:48,177 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3152 transitions. [2022-09-16 11:47:48,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3152 transitions. [2022-09-16 11:47:48,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:47:48,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3152 transitions. [2022-09-16 11:47:48,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 242.46153846153845) internal successors, (3152), 13 states have internal predecessors, (3152), 0 states have call successors, (0), 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 11:47:48,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 335.0) internal successors, (4690), 14 states have internal predecessors, (4690), 0 states have call successors, (0), 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 11:47:48,213 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 335.0) internal successors, (4690), 14 states have internal predecessors, (4690), 0 states have call successors, (0), 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 11:47:48,215 INFO L175 Difference]: Start difference. First operand has 290 places, 309 transitions, 630 flow. Second operand 13 states and 3152 transitions. [2022-09-16 11:47:48,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 349 transitions, 1000 flow [2022-09-16 11:47:48,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 349 transitions, 984 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-09-16 11:47:48,231 INFO L231 Difference]: Finished difference. Result has 298 places, 283 transitions, 613 flow [2022-09-16 11:47:48,234 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=613, PETRI_PLACES=298, PETRI_TRANSITIONS=283} [2022-09-16 11:47:48,238 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 8 predicate places. [2022-09-16 11:47:48,238 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 283 transitions, 613 flow [2022-09-16 11:47:48,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 231.0) internal successors, (1617), 7 states have internal predecessors, (1617), 0 states have call successors, (0), 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 11:47:48,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:47:48,239 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] [2022-09-16 11:47:48,270 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 11:47:48,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-09-16 11:47:48,466 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:47:48,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:47:48,467 INFO L85 PathProgramCache]: Analyzing trace with hash 873756140, now seen corresponding path program 1 times [2022-09-16 11:47:48,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:47:48,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180570280] [2022-09-16 11:47:48,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:47:48,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:47:48,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:47:48,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986709229] [2022-09-16 11:47:48,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:47:48,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:47:48,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:47:48,497 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 11:47:48,499 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 11:47:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:47:48,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2022-09-16 11:47:48,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:47:48,612 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 11:47:48,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:47:48,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:47:48,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180570280] [2022-09-16 11:47:48,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:47:48,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986709229] [2022-09-16 11:47:48,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986709229] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:47:48,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:47:48,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 11:47:48,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562413863] [2022-09-16 11:47:48,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:47:48,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 11:47:48,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:47:48,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 11:47:48,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 11:47:48,620 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 335 [2022-09-16 11:47:48,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 283 transitions, 613 flow. Second operand has 4 states, 4 states have (on average 287.25) internal successors, (1149), 4 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 11:47:48,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:47:48,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 335 [2022-09-16 11:47:48,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:47:48,771 INFO L130 PetriNetUnfolder]: 24/584 cut-off events. [2022-09-16 11:47:48,771 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-09-16 11:47:48,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 584 events. 24/584 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2141 event pairs, 4 based on Foata normal form. 2/504 useless extension candidates. Maximal degree in co-relation 330. Up to 28 conditions per place. [2022-09-16 11:47:48,775 INFO L137 encePairwiseOnDemand]: 327/335 looper letters, 38 selfloop transitions, 6 changer transitions 0/295 dead transitions. [2022-09-16 11:47:48,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 295 transitions, 723 flow [2022-09-16 11:47:48,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 11:47:48,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 11:47:48,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1471 transitions. [2022-09-16 11:47:48,779 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8782089552238806 [2022-09-16 11:47:48,779 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1471 transitions. [2022-09-16 11:47:48,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1471 transitions. [2022-09-16 11:47:48,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:47:48,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1471 transitions. [2022-09-16 11:47:48,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 294.2) internal successors, (1471), 5 states have internal predecessors, (1471), 0 states have call successors, (0), 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 11:47:48,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 335.0) internal successors, (2010), 6 states have internal predecessors, (2010), 0 states have call successors, (0), 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 11:47:48,788 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 335.0) internal successors, (2010), 6 states have internal predecessors, (2010), 0 states have call successors, (0), 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 11:47:48,788 INFO L175 Difference]: Start difference. First operand has 298 places, 283 transitions, 613 flow. Second operand 5 states and 1471 transitions. [2022-09-16 11:47:48,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 295 transitions, 723 flow [2022-09-16 11:47:48,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 295 transitions, 705 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-09-16 11:47:48,797 INFO L231 Difference]: Finished difference. Result has 284 places, 281 transitions, 597 flow [2022-09-16 11:47:48,798 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=597, PETRI_PLACES=284, PETRI_TRANSITIONS=281} [2022-09-16 11:47:48,799 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, -6 predicate places. [2022-09-16 11:47:48,799 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 281 transitions, 597 flow [2022-09-16 11:47:48,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 287.25) internal successors, (1149), 4 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 11:47:48,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:47:48,800 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] [2022-09-16 11:47:48,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-09-16 11:47:49,015 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,SelfDestructingSolverStorable1 [2022-09-16 11:47:49,016 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:47:49,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:47:49,016 INFO L85 PathProgramCache]: Analyzing trace with hash -881217779, now seen corresponding path program 1 times [2022-09-16 11:47:49,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:47:49,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122627349] [2022-09-16 11:47:49,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:47:49,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:47:49,035 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:47:49,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316130078] [2022-09-16 11:47:49,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:47:49,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:47:49,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:47:49,037 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 11:47:49,042 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 11:47:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:47:49,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjunts are in the unsatisfiable core [2022-09-16 11:47:49,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:47:49,577 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 11:47:49,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:47:49,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:47:49,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122627349] [2022-09-16 11:47:49,578 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:47:49,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316130078] [2022-09-16 11:47:49,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316130078] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:47:49,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:47:49,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-09-16 11:47:49,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080860028] [2022-09-16 11:47:49,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:47:49,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-09-16 11:47:49,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:47:49,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-09-16 11:47:49,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-09-16 11:47:49,582 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 335 [2022-09-16 11:47:49,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 281 transitions, 597 flow. Second operand has 11 states, 11 states have (on average 208.1818181818182) internal successors, (2290), 11 states have internal predecessors, (2290), 0 states have call successors, (0), 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 11:47:49,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:47:49,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 335 [2022-09-16 11:47:49,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:47:52,540 INFO L130 PetriNetUnfolder]: 46/605 cut-off events. [2022-09-16 11:47:52,540 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-09-16 11:47:52,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 840 conditions, 605 events. 46/605 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2469 event pairs, 26 based on Foata normal form. 1/524 useless extension candidates. Maximal degree in co-relation 418. Up to 100 conditions per place. [2022-09-16 11:47:52,543 INFO L137 encePairwiseOnDemand]: 319/335 looper letters, 138 selfloop transitions, 18 changer transitions 0/345 dead transitions. [2022-09-16 11:47:52,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 345 transitions, 1039 flow [2022-09-16 11:47:52,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-09-16 11:47:52,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-09-16 11:47:52,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3865 transitions. [2022-09-16 11:47:52,553 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6409618573797679 [2022-09-16 11:47:52,553 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3865 transitions. [2022-09-16 11:47:52,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3865 transitions. [2022-09-16 11:47:52,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:47:52,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3865 transitions. [2022-09-16 11:47:52,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 214.72222222222223) internal successors, (3865), 18 states have internal predecessors, (3865), 0 states have call successors, (0), 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 11:47:52,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 335.0) internal successors, (6365), 19 states have internal predecessors, (6365), 0 states have call successors, (0), 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 11:47:52,578 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 335.0) internal successors, (6365), 19 states have internal predecessors, (6365), 0 states have call successors, (0), 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 11:47:52,579 INFO L175 Difference]: Start difference. First operand has 284 places, 281 transitions, 597 flow. Second operand 18 states and 3865 transitions. [2022-09-16 11:47:52,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 345 transitions, 1039 flow [2022-09-16 11:47:52,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 345 transitions, 1027 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-09-16 11:47:52,586 INFO L231 Difference]: Finished difference. Result has 300 places, 284 transitions, 641 flow [2022-09-16 11:47:52,586 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=641, PETRI_PLACES=300, PETRI_TRANSITIONS=284} [2022-09-16 11:47:52,587 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 10 predicate places. [2022-09-16 11:47:52,587 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 284 transitions, 641 flow [2022-09-16 11:47:52,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 208.1818181818182) internal successors, (2290), 11 states have internal predecessors, (2290), 0 states have call successors, (0), 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 11:47:52,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:47:52,588 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] [2022-09-16 11:47:52,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-09-16 11:47:52,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:47:52,794 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:47:52,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:47:52,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1547946692, now seen corresponding path program 1 times [2022-09-16 11:47:52,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:47:52,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310552414] [2022-09-16 11:47:52,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:47:52,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:47:52,823 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:47:52,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732086400] [2022-09-16 11:47:52,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:47:52,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:47:52,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:47:52,825 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 11:47:52,827 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 11:47:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:47:52,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjunts are in the unsatisfiable core [2022-09-16 11:47:52,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:47:53,091 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 11:47:53,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:47:53,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:47:53,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310552414] [2022-09-16 11:47:53,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:47:53,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732086400] [2022-09-16 11:47:53,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732086400] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:47:53,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:47:53,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-09-16 11:47:53,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597054206] [2022-09-16 11:47:53,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:47:53,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-16 11:47:53,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:47:53,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-16 11:47:53,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-09-16 11:47:53,095 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 335 [2022-09-16 11:47:53,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 284 transitions, 641 flow. Second operand has 10 states, 10 states have (on average 208.5) internal successors, (2085), 10 states have internal predecessors, (2085), 0 states have call successors, (0), 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 11:47:53,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:47:53,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 335 [2022-09-16 11:47:53,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:47:53,830 INFO L130 PetriNetUnfolder]: 46/604 cut-off events. [2022-09-16 11:47:53,830 INFO L131 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2022-09-16 11:47:53,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 861 conditions, 604 events. 46/604 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2477 event pairs, 26 based on Foata normal form. 1/523 useless extension candidates. Maximal degree in co-relation 436. Up to 95 conditions per place. [2022-09-16 11:47:53,834 INFO L137 encePairwiseOnDemand]: 319/335 looper letters, 138 selfloop transitions, 17 changer transitions 0/344 dead transitions. [2022-09-16 11:47:53,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 344 transitions, 1073 flow [2022-09-16 11:47:53,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-09-16 11:47:53,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-09-16 11:47:53,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3864 transitions. [2022-09-16 11:47:53,843 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6407960199004975 [2022-09-16 11:47:53,844 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3864 transitions. [2022-09-16 11:47:53,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3864 transitions. [2022-09-16 11:47:53,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:47:53,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3864 transitions. [2022-09-16 11:47:53,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 214.66666666666666) internal successors, (3864), 18 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 11:47:53,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 335.0) internal successors, (6365), 19 states have internal predecessors, (6365), 0 states have call successors, (0), 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 11:47:53,868 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 335.0) internal successors, (6365), 19 states have internal predecessors, (6365), 0 states have call successors, (0), 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 11:47:53,868 INFO L175 Difference]: Start difference. First operand has 300 places, 284 transitions, 641 flow. Second operand 18 states and 3864 transitions. [2022-09-16 11:47:53,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 344 transitions, 1073 flow [2022-09-16 11:47:53,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 344 transitions, 1041 flow, removed 1 selfloop flow, removed 13 redundant places. [2022-09-16 11:47:53,876 INFO L231 Difference]: Finished difference. Result has 303 places, 283 transitions, 639 flow [2022-09-16 11:47:53,877 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=639, PETRI_PLACES=303, PETRI_TRANSITIONS=283} [2022-09-16 11:47:53,878 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 13 predicate places. [2022-09-16 11:47:53,878 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 283 transitions, 639 flow [2022-09-16 11:47:53,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 208.5) internal successors, (2085), 10 states have internal predecessors, (2085), 0 states have call successors, (0), 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 11:47:53,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:47:53,879 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] [2022-09-16 11:47:53,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-09-16 11:47:54,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:47:54,088 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:47:54,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:47:54,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1435173644, now seen corresponding path program 1 times [2022-09-16 11:47:54,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:47:54,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759779688] [2022-09-16 11:47:54,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:47:54,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:47:54,110 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:47:54,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580141224] [2022-09-16 11:47:54,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:47:54,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:47:54,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:47:54,118 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 11:47:54,119 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 11:47:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:47:54,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2022-09-16 11:47:54,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:47:54,219 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 11:47:54,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:47:54,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:47:54,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759779688] [2022-09-16 11:47:54,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:47:54,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580141224] [2022-09-16 11:47:54,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580141224] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:47:54,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:47:54,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 11:47:54,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653659479] [2022-09-16 11:47:54,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:47:54,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 11:47:54,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:47:54,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 11:47:54,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 11:47:54,228 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 335 [2022-09-16 11:47:54,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 283 transitions, 639 flow. Second operand has 4 states, 4 states have (on average 276.5) internal successors, (1106), 4 states have internal predecessors, (1106), 0 states have call successors, (0), 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 11:47:54,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:47:54,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 335 [2022-09-16 11:47:54,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:47:54,379 INFO L130 PetriNetUnfolder]: 26/830 cut-off events. [2022-09-16 11:47:54,380 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-09-16 11:47:54,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1026 conditions, 830 events. 26/830 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3838 event pairs, 0 based on Foata normal form. 0/724 useless extension candidates. Maximal degree in co-relation 475. Up to 79 conditions per place. [2022-09-16 11:47:54,384 INFO L137 encePairwiseOnDemand]: 315/335 looper letters, 56 selfloop transitions, 17 changer transitions 0/316 dead transitions. [2022-09-16 11:47:54,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 316 transitions, 855 flow [2022-09-16 11:47:54,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 11:47:54,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 11:47:54,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1451 transitions. [2022-09-16 11:47:54,388 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.866268656716418 [2022-09-16 11:47:54,388 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1451 transitions. [2022-09-16 11:47:54,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1451 transitions. [2022-09-16 11:47:54,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:47:54,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1451 transitions. [2022-09-16 11:47:54,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 290.2) internal successors, (1451), 5 states have internal predecessors, (1451), 0 states have call successors, (0), 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 11:47:54,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 335.0) internal successors, (2010), 6 states have internal predecessors, (2010), 0 states have call successors, (0), 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 11:47:54,395 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 335.0) internal successors, (2010), 6 states have internal predecessors, (2010), 0 states have call successors, (0), 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 11:47:54,395 INFO L175 Difference]: Start difference. First operand has 303 places, 283 transitions, 639 flow. Second operand 5 states and 1451 transitions. [2022-09-16 11:47:54,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 316 transitions, 855 flow [2022-09-16 11:47:54,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 316 transitions, 823 flow, removed 0 selfloop flow, removed 15 redundant places. [2022-09-16 11:47:54,401 INFO L231 Difference]: Finished difference. Result has 296 places, 297 transitions, 737 flow [2022-09-16 11:47:54,402 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=737, PETRI_PLACES=296, PETRI_TRANSITIONS=297} [2022-09-16 11:47:54,402 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 6 predicate places. [2022-09-16 11:47:54,402 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 297 transitions, 737 flow [2022-09-16 11:47:54,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 276.5) internal successors, (1106), 4 states have internal predecessors, (1106), 0 states have call successors, (0), 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 11:47:54,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:47:54,403 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] [2022-09-16 11:47:54,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-09-16 11:47:54,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:47:54,620 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:47:54,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:47:54,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1540709418, now seen corresponding path program 1 times [2022-09-16 11:47:54,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:47:54,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476919428] [2022-09-16 11:47:54,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:47:54,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:47:54,637 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:47:54,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1954032345] [2022-09-16 11:47:54,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:47:54,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:47:54,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:47:54,640 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:47:54,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-09-16 11:47:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:47:54,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2022-09-16 11:47:54,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:47:54,723 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 11:47:54,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:47:54,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:47:54,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476919428] [2022-09-16 11:47:54,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:47:54,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954032345] [2022-09-16 11:47:54,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954032345] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:47:54,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:47:54,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 11:47:54,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121807492] [2022-09-16 11:47:54,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:47:54,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 11:47:54,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:47:54,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 11:47:54,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 11:47:54,726 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 335 [2022-09-16 11:47:54,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 297 transitions, 737 flow. Second operand has 4 states, 4 states have (on average 276.75) internal successors, (1107), 4 states have internal predecessors, (1107), 0 states have call successors, (0), 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 11:47:54,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:47:54,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 335 [2022-09-16 11:47:54,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:47:54,847 INFO L130 PetriNetUnfolder]: 26/818 cut-off events. [2022-09-16 11:47:54,847 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2022-09-16 11:47:54,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1074 conditions, 818 events. 26/818 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3745 event pairs, 0 based on Foata normal form. 12/742 useless extension candidates. Maximal degree in co-relation 594. Up to 70 conditions per place. [2022-09-16 11:47:54,851 INFO L137 encePairwiseOnDemand]: 321/335 looper letters, 29 selfloop transitions, 19 changer transitions 0/291 dead transitions. [2022-09-16 11:47:54,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 291 transitions, 803 flow [2022-09-16 11:47:54,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-16 11:47:54,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-16 11:47:54,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1140 transitions. [2022-09-16 11:47:54,854 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8507462686567164 [2022-09-16 11:47:54,854 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1140 transitions. [2022-09-16 11:47:54,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1140 transitions. [2022-09-16 11:47:54,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:47:54,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1140 transitions. [2022-09-16 11:47:54,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 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 11:47:54,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 335.0) internal successors, (1675), 5 states have internal predecessors, (1675), 0 states have call successors, (0), 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 11:47:54,860 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 335.0) internal successors, (1675), 5 states have internal predecessors, (1675), 0 states have call successors, (0), 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 11:47:54,860 INFO L175 Difference]: Start difference. First operand has 296 places, 297 transitions, 737 flow. Second operand 4 states and 1140 transitions. [2022-09-16 11:47:54,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 291 transitions, 803 flow [2022-09-16 11:47:54,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 291 transitions, 787 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-09-16 11:47:54,866 INFO L231 Difference]: Finished difference. Result has 294 places, 291 transitions, 729 flow [2022-09-16 11:47:54,867 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=729, PETRI_PLACES=294, PETRI_TRANSITIONS=291} [2022-09-16 11:47:54,868 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 4 predicate places. [2022-09-16 11:47:54,868 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 291 transitions, 729 flow [2022-09-16 11:47:54,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 276.75) internal successors, (1107), 4 states have internal predecessors, (1107), 0 states have call successors, (0), 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 11:47:54,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:47:54,869 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] [2022-09-16 11:47:54,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-09-16 11:47:55,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:47:55,096 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:47:55,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:47:55,096 INFO L85 PathProgramCache]: Analyzing trace with hash -373525375, now seen corresponding path program 1 times [2022-09-16 11:47:55,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:47:55,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257181441] [2022-09-16 11:47:55,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:47:55,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:47:55,115 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:47:55,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643055490] [2022-09-16 11:47:55,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:47:55,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:47:55,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:47:55,121 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:47:55,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-09-16 11:47:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:47:55,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 11:47:55,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:47:55,226 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 11:47:55,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:47:55,272 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 11:47:55,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:47:55,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257181441] [2022-09-16 11:47:55,276 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:47:55,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643055490] [2022-09-16 11:47:55,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643055490] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:47:55,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-09-16 11:47:55,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-09-16 11:47:55,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560530872] [2022-09-16 11:47:55,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-09-16 11:47:55,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-16 11:47:55,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:47:55,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-16 11:47:55,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-09-16 11:47:55,281 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 335 [2022-09-16 11:47:55,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 291 transitions, 729 flow. Second operand has 10 states, 10 states have (on average 277.5) internal successors, (2775), 10 states have internal predecessors, (2775), 0 states have call successors, (0), 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 11:47:55,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:47:55,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 335 [2022-09-16 11:47:55,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:47:55,710 INFO L130 PetriNetUnfolder]: 62/1766 cut-off events. [2022-09-16 11:47:55,710 INFO L131 PetriNetUnfolder]: For 232/232 co-relation queries the response was YES. [2022-09-16 11:47:55,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2332 conditions, 1766 events. 62/1766 cut-off events. For 232/232 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 11607 event pairs, 0 based on Foata normal form. 18/1564 useless extension candidates. Maximal degree in co-relation 1134. Up to 67 conditions per place. [2022-09-16 11:47:55,718 INFO L137 encePairwiseOnDemand]: 315/335 looper letters, 104 selfloop transitions, 50 changer transitions 0/397 dead transitions. [2022-09-16 11:47:55,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 397 transitions, 1367 flow [2022-09-16 11:47:55,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-16 11:47:55,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-16 11:47:55,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4013 transitions. [2022-09-16 11:47:55,726 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8556503198294243 [2022-09-16 11:47:55,727 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4013 transitions. [2022-09-16 11:47:55,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4013 transitions. [2022-09-16 11:47:55,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:47:55,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4013 transitions. [2022-09-16 11:47:55,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 286.64285714285717) internal successors, (4013), 14 states have internal predecessors, (4013), 0 states have call successors, (0), 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 11:47:55,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 335.0) internal successors, (5025), 15 states have internal predecessors, (5025), 0 states have call successors, (0), 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 11:47:55,742 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 335.0) internal successors, (5025), 15 states have internal predecessors, (5025), 0 states have call successors, (0), 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 11:47:55,742 INFO L175 Difference]: Start difference. First operand has 294 places, 291 transitions, 729 flow. Second operand 14 states and 4013 transitions. [2022-09-16 11:47:55,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 397 transitions, 1367 flow [2022-09-16 11:47:55,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 397 transitions, 1287 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-16 11:47:55,751 INFO L231 Difference]: Finished difference. Result has 308 places, 324 transitions, 992 flow [2022-09-16 11:47:55,751 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=992, PETRI_PLACES=308, PETRI_TRANSITIONS=324} [2022-09-16 11:47:55,752 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 18 predicate places. [2022-09-16 11:47:55,752 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 324 transitions, 992 flow [2022-09-16 11:47:55,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 277.5) internal successors, (2775), 10 states have internal predecessors, (2775), 0 states have call successors, (0), 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 11:47:55,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:47:55,753 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] [2022-09-16 11:47:55,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-09-16 11:47:55,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:47:55,976 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:47:55,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:47:55,976 INFO L85 PathProgramCache]: Analyzing trace with hash -367726028, now seen corresponding path program 2 times [2022-09-16 11:47:55,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:47:55,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69351756] [2022-09-16 11:47:55,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:47:55,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:47:56,006 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:47:56,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443547250] [2022-09-16 11:47:56,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-16 11:47:56,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:47:56,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:47:56,008 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:47:56,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-09-16 11:47:56,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-09-16 11:47:56,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-16 11:47:56,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 7 conjunts are in the unsatisfiable core [2022-09-16 11:47:56,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:47:57,654 WARN L855 $PredicateComparison]: unable to prove that (exists ((~M~0 Int) (~N~0 Int)) (let ((.cse0 (* ~N~0 ~M~0))) (and (<= .cse0 2147483647) (<= (+ |c_ULTIMATE.start_create_fresh_int_array_~i~3#1| 1) .cse0)))) is different from true [2022-09-16 11:47:58,523 WARN L855 $PredicateComparison]: unable to prove that (exists ((~M~0 Int) (~N~0 Int)) (let ((.cse0 (* ~N~0 ~M~0))) (and (<= .cse0 2147483647) (<= (+ |c_ULTIMATE.start_create_fresh_int_array_#t~post27#1| 1) .cse0)))) is different from true [2022-09-16 11:47:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 20 not checked. [2022-09-16 11:47:58,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:48:11,168 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 11:48:11,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:48:11,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69351756] [2022-09-16 11:48:11,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:48:11,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443547250] [2022-09-16 11:48:11,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443547250] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:48:11,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-09-16 11:48:11,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-09-16 11:48:11,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730854982] [2022-09-16 11:48:11,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-09-16 11:48:11,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-09-16 11:48:11,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:48:11,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-09-16 11:48:11,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=78, Unknown=14, NotChecked=38, Total=156 [2022-09-16 11:48:11,173 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 335 [2022-09-16 11:48:11,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 324 transitions, 992 flow. Second operand has 13 states, 13 states have (on average 216.69230769230768) internal successors, (2817), 13 states have internal predecessors, (2817), 0 states have call successors, (0), 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 11:48:11,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:48:11,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 335 [2022-09-16 11:48:11,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:48:25,133 WARN L233 SmtUtils]: Spent 6.78s on a formula simplification. DAG size of input: 17 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-09-16 11:48:37,250 INFO L130 PetriNetUnfolder]: 812/4184 cut-off events. [2022-09-16 11:48:37,251 INFO L131 PetriNetUnfolder]: For 527/527 co-relation queries the response was YES. [2022-09-16 11:48:37,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6364 conditions, 4184 events. 812/4184 cut-off events. For 527/527 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 35636 event pairs, 410 based on Foata normal form. 2/3166 useless extension candidates. Maximal degree in co-relation 5027. Up to 1325 conditions per place. [2022-09-16 11:48:37,280 INFO L137 encePairwiseOnDemand]: 310/335 looper letters, 142 selfloop transitions, 37 changer transitions 0/365 dead transitions. [2022-09-16 11:48:37,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 365 transitions, 1432 flow [2022-09-16 11:48:37,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-09-16 11:48:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-09-16 11:48:37,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2909 transitions. [2022-09-16 11:48:37,286 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6679678530424799 [2022-09-16 11:48:37,286 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2909 transitions. [2022-09-16 11:48:37,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2909 transitions. [2022-09-16 11:48:37,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:48:37,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2909 transitions. [2022-09-16 11:48:37,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 223.76923076923077) internal successors, (2909), 13 states have internal predecessors, (2909), 0 states have call successors, (0), 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 11:48:37,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 335.0) internal successors, (4690), 14 states have internal predecessors, (4690), 0 states have call successors, (0), 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 11:48:37,300 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 335.0) internal successors, (4690), 14 states have internal predecessors, (4690), 0 states have call successors, (0), 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 11:48:37,300 INFO L175 Difference]: Start difference. First operand has 308 places, 324 transitions, 992 flow. Second operand 13 states and 2909 transitions. [2022-09-16 11:48:37,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 365 transitions, 1432 flow [2022-09-16 11:48:37,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 365 transitions, 1316 flow, removed 41 selfloop flow, removed 5 redundant places. [2022-09-16 11:48:37,309 INFO L231 Difference]: Finished difference. Result has 316 places, 327 transitions, 983 flow [2022-09-16 11:48:37,310 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=983, PETRI_PLACES=316, PETRI_TRANSITIONS=327} [2022-09-16 11:48:37,311 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 26 predicate places. [2022-09-16 11:48:37,311 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 327 transitions, 983 flow [2022-09-16 11:48:37,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 216.69230769230768) internal successors, (2817), 13 states have internal predecessors, (2817), 0 states have call successors, (0), 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 11:48:37,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:48:37,312 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] [2022-09-16 11:48:37,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-09-16 11:48:37,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-09-16 11:48:37,528 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:48:37,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:48:37,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1657230818, now seen corresponding path program 1 times [2022-09-16 11:48:37,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:48:37,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642962110] [2022-09-16 11:48:37,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:48:37,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:48:37,584 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:48:37,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451760568] [2022-09-16 11:48:37,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:48:37,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:48:37,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:48:37,586 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:48:37,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-09-16 11:48:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:48:37,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 6 conjunts are in the unsatisfiable core [2022-09-16 11:48:37,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:48:37,804 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 11:48:37,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:48:37,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:48:37,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642962110] [2022-09-16 11:48:37,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:48:37,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451760568] [2022-09-16 11:48:37,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451760568] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:48:37,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:48:37,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-09-16 11:48:37,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612984207] [2022-09-16 11:48:37,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:48:37,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-16 11:48:37,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:48:37,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-16 11:48:37,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-09-16 11:48:37,809 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 335 [2022-09-16 11:48:37,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 327 transitions, 983 flow. Second operand has 7 states, 7 states have (on average 269.42857142857144) internal successors, (1886), 7 states have internal predecessors, (1886), 0 states have call successors, (0), 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 11:48:37,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:48:37,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 335 [2022-09-16 11:48:37,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:48:38,700 INFO L130 PetriNetUnfolder]: 354/5628 cut-off events. [2022-09-16 11:48:38,701 INFO L131 PetriNetUnfolder]: For 736/748 co-relation queries the response was YES. [2022-09-16 11:48:38,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7546 conditions, 5628 events. 354/5628 cut-off events. For 736/748 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 53102 event pairs, 138 based on Foata normal form. 0/4718 useless extension candidates. Maximal degree in co-relation 5897. Up to 341 conditions per place. [2022-09-16 11:48:38,732 INFO L137 encePairwiseOnDemand]: 319/335 looper letters, 146 selfloop transitions, 34 changer transitions 0/423 dead transitions. [2022-09-16 11:48:38,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 423 transitions, 1694 flow [2022-09-16 11:48:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-09-16 11:48:38,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-09-16 11:48:38,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4119 transitions. [2022-09-16 11:48:38,742 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8197014925373134 [2022-09-16 11:48:38,742 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4119 transitions. [2022-09-16 11:48:38,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4119 transitions. [2022-09-16 11:48:38,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:48:38,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4119 transitions. [2022-09-16 11:48:38,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 274.6) internal successors, (4119), 15 states have internal predecessors, (4119), 0 states have call successors, (0), 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 11:48:38,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 335.0) internal successors, (5360), 16 states have internal predecessors, (5360), 0 states have call successors, (0), 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 11:48:38,783 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 335.0) internal successors, (5360), 16 states have internal predecessors, (5360), 0 states have call successors, (0), 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 11:48:38,783 INFO L175 Difference]: Start difference. First operand has 316 places, 327 transitions, 983 flow. Second operand 15 states and 4119 transitions. [2022-09-16 11:48:38,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 423 transitions, 1694 flow [2022-09-16 11:48:38,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 423 transitions, 1645 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-09-16 11:48:38,793 INFO L231 Difference]: Finished difference. Result has 329 places, 349 transitions, 1152 flow [2022-09-16 11:48:38,793 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=939, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1152, PETRI_PLACES=329, PETRI_TRANSITIONS=349} [2022-09-16 11:48:38,794 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 39 predicate places. [2022-09-16 11:48:38,794 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 349 transitions, 1152 flow [2022-09-16 11:48:38,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 269.42857142857144) internal successors, (1886), 7 states have internal predecessors, (1886), 0 states have call successors, (0), 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 11:48:38,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:48:38,795 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, 1, 1, 1] [2022-09-16 11:48:38,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-09-16 11:48:39,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:48:39,019 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:48:39,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:48:39,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1823950980, now seen corresponding path program 1 times [2022-09-16 11:48:39,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:48:39,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056821147] [2022-09-16 11:48:39,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:48:39,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:48:39,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:48:39,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540976084] [2022-09-16 11:48:39,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:48:39,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:48:39,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:48:39,040 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:48:39,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-09-16 11:48:39,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:48:39,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-16 11:48:39,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:48:39,171 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 11:48:39,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:48:39,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:48:39,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056821147] [2022-09-16 11:48:39,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:48:39,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540976084] [2022-09-16 11:48:39,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540976084] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:48:39,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:48:39,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-16 11:48:39,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897073907] [2022-09-16 11:48:39,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:48:39,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-16 11:48:39,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:48:39,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-16 11:48:39,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-09-16 11:48:39,175 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 335 [2022-09-16 11:48:39,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 349 transitions, 1152 flow. Second operand has 5 states, 5 states have (on average 275.4) internal successors, (1377), 5 states have internal predecessors, (1377), 0 states have call successors, (0), 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 11:48:39,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:48:39,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 335 [2022-09-16 11:48:39,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:48:40,055 INFO L130 PetriNetUnfolder]: 506/5730 cut-off events. [2022-09-16 11:48:40,056 INFO L131 PetriNetUnfolder]: For 1021/1021 co-relation queries the response was YES. [2022-09-16 11:48:40,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8271 conditions, 5730 events. 506/5730 cut-off events. For 1021/1021 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 56054 event pairs, 318 based on Foata normal form. 0/4984 useless extension candidates. Maximal degree in co-relation 8130. Up to 1169 conditions per place. [2022-09-16 11:48:40,090 INFO L137 encePairwiseOnDemand]: 328/335 looper letters, 46 selfloop transitions, 6 changer transitions 0/362 dead transitions. [2022-09-16 11:48:40,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 362 transitions, 1287 flow [2022-09-16 11:48:40,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-09-16 11:48:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-09-16 11:48:40,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1685 transitions. [2022-09-16 11:48:40,093 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8383084577114428 [2022-09-16 11:48:40,093 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1685 transitions. [2022-09-16 11:48:40,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1685 transitions. [2022-09-16 11:48:40,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:48:40,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1685 transitions. [2022-09-16 11:48:40,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 280.8333333333333) internal successors, (1685), 6 states have internal predecessors, (1685), 0 states have call successors, (0), 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 11:48:40,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 335.0) internal successors, (2345), 7 states have internal predecessors, (2345), 0 states have call successors, (0), 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 11:48:40,098 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 335.0) internal successors, (2345), 7 states have internal predecessors, (2345), 0 states have call successors, (0), 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 11:48:40,098 INFO L175 Difference]: Start difference. First operand has 329 places, 349 transitions, 1152 flow. Second operand 6 states and 1685 transitions. [2022-09-16 11:48:40,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 362 transitions, 1287 flow [2022-09-16 11:48:40,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 362 transitions, 1287 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-16 11:48:40,110 INFO L231 Difference]: Finished difference. Result has 337 places, 352 transitions, 1184 flow [2022-09-16 11:48:40,111 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1184, PETRI_PLACES=337, PETRI_TRANSITIONS=352} [2022-09-16 11:48:40,113 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 47 predicate places. [2022-09-16 11:48:40,113 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 352 transitions, 1184 flow [2022-09-16 11:48:40,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 275.4) internal successors, (1377), 5 states have internal predecessors, (1377), 0 states have call successors, (0), 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 11:48:40,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:48:40,114 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, 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 11:48:40,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-09-16 11:48:40,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-09-16 11:48:40,338 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:48:40,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:48:40,339 INFO L85 PathProgramCache]: Analyzing trace with hash -775630940, now seen corresponding path program 1 times [2022-09-16 11:48:40,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:48:40,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795440796] [2022-09-16 11:48:40,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:48:40,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:48:40,365 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:48:40,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345534662] [2022-09-16 11:48:40,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:48:40,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:48:40,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:48:40,371 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:48:40,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-09-16 11:48:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:48:40,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-16 11:48:40,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:48:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-09-16 11:48:40,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:48:40,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:48:40,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795440796] [2022-09-16 11:48:40,586 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:48:40,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345534662] [2022-09-16 11:48:40,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345534662] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:48:40,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:48:40,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-09-16 11:48:40,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143475358] [2022-09-16 11:48:40,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:48:40,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-09-16 11:48:40,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:48:40,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-09-16 11:48:40,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-09-16 11:48:40,589 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 335 [2022-09-16 11:48:40,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 352 transitions, 1184 flow. Second operand has 9 states, 9 states have (on average 273.44444444444446) internal successors, (2461), 9 states have internal predecessors, (2461), 0 states have call successors, (0), 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 11:48:40,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:48:40,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 335 [2022-09-16 11:48:40,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:48:41,426 INFO L130 PetriNetUnfolder]: 206/4472 cut-off events. [2022-09-16 11:48:41,426 INFO L131 PetriNetUnfolder]: For 1448/1462 co-relation queries the response was YES. [2022-09-16 11:48:41,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6544 conditions, 4472 events. 206/4472 cut-off events. For 1448/1462 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 38971 event pairs, 50 based on Foata normal form. 16/4010 useless extension candidates. Maximal degree in co-relation 6439. Up to 271 conditions per place. [2022-09-16 11:48:41,448 INFO L137 encePairwiseOnDemand]: 319/335 looper letters, 118 selfloop transitions, 28 changer transitions 0/400 dead transitions. [2022-09-16 11:48:41,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 400 transitions, 1650 flow [2022-09-16 11:48:41,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-16 11:48:41,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-16 11:48:41,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3896 transitions. [2022-09-16 11:48:41,453 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8307036247334755 [2022-09-16 11:48:41,453 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3896 transitions. [2022-09-16 11:48:41,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3896 transitions. [2022-09-16 11:48:41,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:48:41,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3896 transitions. [2022-09-16 11:48:41,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 278.2857142857143) internal successors, (3896), 14 states have internal predecessors, (3896), 0 states have call successors, (0), 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 11:48:41,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 335.0) internal successors, (5025), 15 states have internal predecessors, (5025), 0 states have call successors, (0), 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 11:48:41,466 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 335.0) internal successors, (5025), 15 states have internal predecessors, (5025), 0 states have call successors, (0), 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 11:48:41,466 INFO L175 Difference]: Start difference. First operand has 337 places, 352 transitions, 1184 flow. Second operand 14 states and 3896 transitions. [2022-09-16 11:48:41,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 400 transitions, 1650 flow [2022-09-16 11:48:41,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 400 transitions, 1624 flow, removed 10 selfloop flow, removed 4 redundant places. [2022-09-16 11:48:41,479 INFO L231 Difference]: Finished difference. Result has 346 places, 348 transitions, 1203 flow [2022-09-16 11:48:41,480 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1203, PETRI_PLACES=346, PETRI_TRANSITIONS=348} [2022-09-16 11:48:41,481 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 56 predicate places. [2022-09-16 11:48:41,481 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 348 transitions, 1203 flow [2022-09-16 11:48:41,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 273.44444444444446) internal successors, (2461), 9 states have internal predecessors, (2461), 0 states have call successors, (0), 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 11:48:41,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:48:41,482 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 11:48:41,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-09-16 11:48:41,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-09-16 11:48:41,696 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:48:41,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:48:41,696 INFO L85 PathProgramCache]: Analyzing trace with hash -12098358, now seen corresponding path program 1 times [2022-09-16 11:48:41,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:48:41,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677666092] [2022-09-16 11:48:41,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:48:41,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:48:41,720 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:48:41,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006047240] [2022-09-16 11:48:41,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:48:41,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:48:41,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:48:41,728 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:48:41,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-09-16 11:48:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:48:41,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 3 conjunts are in the unsatisfiable core [2022-09-16 11:48:41,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:48:41,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-16 11:48:41,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:48:41,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:48:41,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677666092] [2022-09-16 11:48:41,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:48:41,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006047240] [2022-09-16 11:48:41,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006047240] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:48:41,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:48:41,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 11:48:41,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129765663] [2022-09-16 11:48:41,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:48:41,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 11:48:41,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:48:41,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 11:48:41,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 11:48:41,874 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 335 [2022-09-16 11:48:41,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 348 transitions, 1203 flow. Second operand has 4 states, 4 states have (on average 300.75) internal successors, (1203), 4 states have internal predecessors, (1203), 0 states have call successors, (0), 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 11:48:41,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:48:41,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 335 [2022-09-16 11:48:41,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:48:42,717 INFO L130 PetriNetUnfolder]: 584/6568 cut-off events. [2022-09-16 11:48:42,717 INFO L131 PetriNetUnfolder]: For 899/967 co-relation queries the response was YES. [2022-09-16 11:48:42,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9762 conditions, 6568 events. 584/6568 cut-off events. For 899/967 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 66403 event pairs, 86 based on Foata normal form. 0/5784 useless extension candidates. Maximal degree in co-relation 7873. Up to 677 conditions per place. [2022-09-16 11:48:42,748 INFO L137 encePairwiseOnDemand]: 329/335 looper letters, 26 selfloop transitions, 8 changer transitions 0/363 dead transitions. [2022-09-16 11:48:42,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 363 transitions, 1310 flow [2022-09-16 11:48:42,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 11:48:42,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 11:48:42,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1527 transitions. [2022-09-16 11:48:42,753 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9116417910447762 [2022-09-16 11:48:42,753 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1527 transitions. [2022-09-16 11:48:42,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1527 transitions. [2022-09-16 11:48:42,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:48:42,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1527 transitions. [2022-09-16 11:48:42,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 305.4) internal successors, (1527), 5 states have internal predecessors, (1527), 0 states have call successors, (0), 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 11:48:42,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 335.0) internal successors, (2010), 6 states have internal predecessors, (2010), 0 states have call successors, (0), 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 11:48:42,763 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 335.0) internal successors, (2010), 6 states have internal predecessors, (2010), 0 states have call successors, (0), 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 11:48:42,763 INFO L175 Difference]: Start difference. First operand has 346 places, 348 transitions, 1203 flow. Second operand 5 states and 1527 transitions. [2022-09-16 11:48:42,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 363 transitions, 1310 flow [2022-09-16 11:48:42,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 363 transitions, 1262 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-09-16 11:48:42,777 INFO L231 Difference]: Finished difference. Result has 345 places, 352 transitions, 1205 flow [2022-09-16 11:48:42,778 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1205, PETRI_PLACES=345, PETRI_TRANSITIONS=352} [2022-09-16 11:48:42,780 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 55 predicate places. [2022-09-16 11:48:42,780 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 352 transitions, 1205 flow [2022-09-16 11:48:42,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 300.75) internal successors, (1203), 4 states have internal predecessors, (1203), 0 states have call successors, (0), 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 11:48:42,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:48:42,781 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 11:48:42,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-09-16 11:48:43,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-09-16 11:48:43,005 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:48:43,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:48:43,006 INFO L85 PathProgramCache]: Analyzing trace with hash -152607381, now seen corresponding path program 1 times [2022-09-16 11:48:43,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:48:43,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881642450] [2022-09-16 11:48:43,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:48:43,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:48:43,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:48:43,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589804750] [2022-09-16 11:48:43,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:48:43,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:48:43,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:48:43,043 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:48:43,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-09-16 11:48:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:48:43,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 3 conjunts are in the unsatisfiable core [2022-09-16 11:48:43,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:48:43,195 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 11:48:43,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:48:43,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:48:43,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881642450] [2022-09-16 11:48:43,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:48:43,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589804750] [2022-09-16 11:48:43,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589804750] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:48:43,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:48:43,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 11:48:43,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866689075] [2022-09-16 11:48:43,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:48:43,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 11:48:43,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:48:43,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 11:48:43,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 11:48:43,198 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 335 [2022-09-16 11:48:43,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 352 transitions, 1205 flow. Second operand has 4 states, 4 states have (on average 300.5) internal successors, (1202), 4 states have internal predecessors, (1202), 0 states have call successors, (0), 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 11:48:43,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:48:43,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 335 [2022-09-16 11:48:43,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:48:43,841 INFO L130 PetriNetUnfolder]: 120/4758 cut-off events. [2022-09-16 11:48:43,841 INFO L131 PetriNetUnfolder]: For 821/839 co-relation queries the response was YES. [2022-09-16 11:48:43,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6749 conditions, 4758 events. 120/4758 cut-off events. For 821/839 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 43185 event pairs, 0 based on Foata normal form. 0/4368 useless extension candidates. Maximal degree in co-relation 5749. Up to 302 conditions per place. [2022-09-16 11:48:43,873 INFO L137 encePairwiseOnDemand]: 329/335 looper letters, 24 selfloop transitions, 5 changer transitions 0/363 dead transitions. [2022-09-16 11:48:43,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 363 transitions, 1289 flow [2022-09-16 11:48:43,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 11:48:43,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 11:48:43,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1525 transitions. [2022-09-16 11:48:43,876 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9104477611940298 [2022-09-16 11:48:43,876 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1525 transitions. [2022-09-16 11:48:43,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1525 transitions. [2022-09-16 11:48:43,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:48:43,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1525 transitions. [2022-09-16 11:48:43,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 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 11:48:43,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 335.0) internal successors, (2010), 6 states have internal predecessors, (2010), 0 states have call successors, (0), 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 11:48:43,880 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 335.0) internal successors, (2010), 6 states have internal predecessors, (2010), 0 states have call successors, (0), 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 11:48:43,880 INFO L175 Difference]: Start difference. First operand has 345 places, 352 transitions, 1205 flow. Second operand 5 states and 1525 transitions. [2022-09-16 11:48:43,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 363 transitions, 1289 flow [2022-09-16 11:48:43,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 363 transitions, 1289 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-16 11:48:43,895 INFO L231 Difference]: Finished difference. Result has 353 places, 355 transitions, 1239 flow [2022-09-16 11:48:43,895 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1239, PETRI_PLACES=353, PETRI_TRANSITIONS=355} [2022-09-16 11:48:43,896 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 63 predicate places. [2022-09-16 11:48:43,896 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 355 transitions, 1239 flow [2022-09-16 11:48:43,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 300.5) internal successors, (1202), 4 states have internal predecessors, (1202), 0 states have call successors, (0), 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 11:48:43,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:48:43,897 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 11:48:43,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-09-16 11:48:44,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-09-16 11:48:44,122 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:48:44,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:48:44,122 INFO L85 PathProgramCache]: Analyzing trace with hash -375048270, now seen corresponding path program 1 times [2022-09-16 11:48:44,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:48:44,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942053702] [2022-09-16 11:48:44,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:48:44,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:48:44,146 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:48:44,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318766596] [2022-09-16 11:48:44,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:48:44,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:48:44,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:48:44,148 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:48:44,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-09-16 11:48:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:48:44,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 3 conjunts are in the unsatisfiable core [2022-09-16 11:48:44,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:48:44,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-16 11:48:44,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:48:44,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:48:44,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942053702] [2022-09-16 11:48:44,286 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:48:44,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318766596] [2022-09-16 11:48:44,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318766596] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:48:44,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:48:44,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 11:48:44,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616300454] [2022-09-16 11:48:44,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:48:44,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 11:48:44,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:48:44,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 11:48:44,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 11:48:44,289 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 335 [2022-09-16 11:48:44,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 355 transitions, 1239 flow. Second operand has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 11:48:44,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:48:44,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 335 [2022-09-16 11:48:44,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:48:45,129 INFO L130 PetriNetUnfolder]: 548/6460 cut-off events. [2022-09-16 11:48:45,129 INFO L131 PetriNetUnfolder]: For 1439/1507 co-relation queries the response was YES. [2022-09-16 11:48:45,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10216 conditions, 6460 events. 548/6460 cut-off events. For 1439/1507 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 64836 event pairs, 176 based on Foata normal form. 72/5936 useless extension candidates. Maximal degree in co-relation 8320. Up to 760 conditions per place. [2022-09-16 11:48:45,181 INFO L137 encePairwiseOnDemand]: 331/335 looper letters, 15 selfloop transitions, 8 changer transitions 0/355 dead transitions. [2022-09-16 11:48:45,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 355 transitions, 1281 flow [2022-09-16 11:48:45,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-16 11:48:45,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-16 11:48:45,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1214 transitions. [2022-09-16 11:48:45,184 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9059701492537313 [2022-09-16 11:48:45,184 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1214 transitions. [2022-09-16 11:48:45,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1214 transitions. [2022-09-16 11:48:45,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:48:45,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1214 transitions. [2022-09-16 11:48:45,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 303.5) internal successors, (1214), 4 states have internal predecessors, (1214), 0 states have call successors, (0), 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 11:48:45,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 335.0) internal successors, (1675), 5 states have internal predecessors, (1675), 0 states have call successors, (0), 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 11:48:45,187 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 335.0) internal successors, (1675), 5 states have internal predecessors, (1675), 0 states have call successors, (0), 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 11:48:45,188 INFO L175 Difference]: Start difference. First operand has 353 places, 355 transitions, 1239 flow. Second operand 4 states and 1214 transitions. [2022-09-16 11:48:45,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 355 transitions, 1281 flow [2022-09-16 11:48:45,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 355 transitions, 1271 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-09-16 11:48:45,209 INFO L231 Difference]: Finished difference. Result has 353 places, 353 transitions, 1235 flow [2022-09-16 11:48:45,209 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1235, PETRI_PLACES=353, PETRI_TRANSITIONS=353} [2022-09-16 11:48:45,210 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 63 predicate places. [2022-09-16 11:48:45,211 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 353 transitions, 1235 flow [2022-09-16 11:48:45,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 11:48:45,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:48:45,211 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 11:48:45,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-09-16 11:48:45,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:48:45,435 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:48:45,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:48:45,436 INFO L85 PathProgramCache]: Analyzing trace with hash -435860741, now seen corresponding path program 1 times [2022-09-16 11:48:45,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:48:45,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799338528] [2022-09-16 11:48:45,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:48:45,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:48:45,461 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:48:45,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722738671] [2022-09-16 11:48:45,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:48:45,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:48:45,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:48:45,465 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:48:45,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-09-16 11:48:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:48:45,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 3 conjunts are in the unsatisfiable core [2022-09-16 11:48:45,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:48:45,617 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 11:48:45,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:48:45,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:48:45,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799338528] [2022-09-16 11:48:45,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:48:45,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722738671] [2022-09-16 11:48:45,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722738671] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:48:45,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:48:45,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 11:48:45,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840188415] [2022-09-16 11:48:45,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:48:45,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 11:48:45,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:48:45,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 11:48:45,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 11:48:45,621 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 335 [2022-09-16 11:48:45,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 353 transitions, 1235 flow. Second operand has 4 states, 4 states have (on average 300.75) internal successors, (1203), 4 states have internal predecessors, (1203), 0 states have call successors, (0), 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 11:48:45,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:48:45,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 335 [2022-09-16 11:48:45,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:48:46,186 INFO L130 PetriNetUnfolder]: 120/4682 cut-off events. [2022-09-16 11:48:46,187 INFO L131 PetriNetUnfolder]: For 1095/1113 co-relation queries the response was YES. [2022-09-16 11:48:46,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6841 conditions, 4682 events. 120/4682 cut-off events. For 1095/1113 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 42250 event pairs, 0 based on Foata normal form. 40/4392 useless extension candidates. Maximal degree in co-relation 5855. Up to 320 conditions per place. [2022-09-16 11:48:46,213 INFO L137 encePairwiseOnDemand]: 331/335 looper letters, 14 selfloop transitions, 5 changer transitions 0/351 dead transitions. [2022-09-16 11:48:46,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 351 transitions, 1263 flow [2022-09-16 11:48:46,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-16 11:48:46,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-16 11:48:46,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1212 transitions. [2022-09-16 11:48:46,216 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9044776119402985 [2022-09-16 11:48:46,216 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1212 transitions. [2022-09-16 11:48:46,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1212 transitions. [2022-09-16 11:48:46,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:48:46,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1212 transitions. [2022-09-16 11:48:46,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 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 11:48:46,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 335.0) internal successors, (1675), 5 states have internal predecessors, (1675), 0 states have call successors, (0), 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 11:48:46,219 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 335.0) internal successors, (1675), 5 states have internal predecessors, (1675), 0 states have call successors, (0), 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 11:48:46,219 INFO L175 Difference]: Start difference. First operand has 353 places, 353 transitions, 1235 flow. Second operand 4 states and 1212 transitions. [2022-09-16 11:48:46,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 351 transitions, 1263 flow [2022-09-16 11:48:46,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 351 transitions, 1243 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-09-16 11:48:46,234 INFO L231 Difference]: Finished difference. Result has 350 places, 351 transitions, 1215 flow [2022-09-16 11:48:46,235 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1215, PETRI_PLACES=350, PETRI_TRANSITIONS=351} [2022-09-16 11:48:46,235 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 60 predicate places. [2022-09-16 11:48:46,235 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 351 transitions, 1215 flow [2022-09-16 11:48:46,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 300.75) internal successors, (1203), 4 states have internal predecessors, (1203), 0 states have call successors, (0), 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 11:48:46,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:48:46,236 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, 1, 1, 1, 1, 1, 1, 1, 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 11:48:46,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-09-16 11:48:46,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-09-16 11:48:46,460 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:48:46,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:48:46,461 INFO L85 PathProgramCache]: Analyzing trace with hash 2044303991, now seen corresponding path program 1 times [2022-09-16 11:48:46,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:48:46,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007321810] [2022-09-16 11:48:46,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:48:46,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:48:46,475 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:48:46,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2705106] [2022-09-16 11:48:46,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:48:46,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:48:46,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:48:46,477 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:48:46,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-09-16 11:48:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:48:46,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-16 11:48:46,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:48:46,788 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-09-16 11:48:46,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:48:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-09-16 11:48:47,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:48:47,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007321810] [2022-09-16 11:48:47,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:48:47,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2705106] [2022-09-16 11:48:47,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2705106] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:48:47,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-09-16 11:48:47,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-09-16 11:48:47,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682175557] [2022-09-16 11:48:47,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-09-16 11:48:47,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-09-16 11:48:47,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:48:47,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-09-16 11:48:47,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-09-16 11:48:47,031 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 335 [2022-09-16 11:48:47,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 351 transitions, 1215 flow. Second operand has 21 states, 21 states have (on average 259.04761904761904) internal successors, (5440), 21 states have internal predecessors, (5440), 0 states have call successors, (0), 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 11:48:47,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:48:47,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 335 [2022-09-16 11:48:47,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:48:48,832 INFO L130 PetriNetUnfolder]: 340/7786 cut-off events. [2022-09-16 11:48:48,832 INFO L131 PetriNetUnfolder]: For 2192/2208 co-relation queries the response was YES. [2022-09-16 11:48:48,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12160 conditions, 7786 events. 340/7786 cut-off events. For 2192/2208 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 80252 event pairs, 136 based on Foata normal form. 18/7230 useless extension candidates. Maximal degree in co-relation 10501. Up to 351 conditions per place. [2022-09-16 11:48:48,871 INFO L137 encePairwiseOnDemand]: 311/335 looper letters, 145 selfloop transitions, 79 changer transitions 0/456 dead transitions. [2022-09-16 11:48:48,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 456 transitions, 2115 flow [2022-09-16 11:48:48,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-09-16 11:48:48,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-09-16 11:48:48,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7844 transitions. [2022-09-16 11:48:48,877 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.780497512437811 [2022-09-16 11:48:48,877 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7844 transitions. [2022-09-16 11:48:48,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7844 transitions. [2022-09-16 11:48:48,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:48:48,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7844 transitions. [2022-09-16 11:48:48,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 261.46666666666664) internal successors, (7844), 30 states have internal predecessors, (7844), 0 states have call successors, (0), 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 11:48:48,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 335.0) internal successors, (10385), 31 states have internal predecessors, (10385), 0 states have call successors, (0), 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 11:48:48,892 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 335.0) internal successors, (10385), 31 states have internal predecessors, (10385), 0 states have call successors, (0), 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 11:48:48,892 INFO L175 Difference]: Start difference. First operand has 350 places, 351 transitions, 1215 flow. Second operand 30 states and 7844 transitions. [2022-09-16 11:48:48,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 456 transitions, 2115 flow [2022-09-16 11:48:48,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 456 transitions, 2105 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-16 11:48:48,910 INFO L231 Difference]: Finished difference. Result has 381 places, 381 transitions, 1614 flow [2022-09-16 11:48:48,911 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1614, PETRI_PLACES=381, PETRI_TRANSITIONS=381} [2022-09-16 11:48:48,911 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 91 predicate places. [2022-09-16 11:48:48,911 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 381 transitions, 1614 flow [2022-09-16 11:48:48,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 259.04761904761904) internal successors, (5440), 21 states have internal predecessors, (5440), 0 states have call successors, (0), 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 11:48:48,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:48:48,912 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:48:48,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-09-16 11:48:49,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-09-16 11:48:49,118 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:48:49,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:48:49,118 INFO L85 PathProgramCache]: Analyzing trace with hash -919115944, now seen corresponding path program 1 times [2022-09-16 11:48:49,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:48:49,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122964162] [2022-09-16 11:48:49,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:48:49,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:48:49,138 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:48:49,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384537688] [2022-09-16 11:48:49,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:48:49,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:48:49,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:48:49,140 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:48:49,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-09-16 11:48:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:48:49,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 10 conjunts are in the unsatisfiable core [2022-09-16 11:48:49,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:48:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-16 11:48:49,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:48:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-16 11:48:49,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:48:49,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122964162] [2022-09-16 11:48:49,705 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:48:49,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384537688] [2022-09-16 11:48:49,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384537688] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:48:49,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-09-16 11:48:49,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-09-16 11:48:49,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876755420] [2022-09-16 11:48:49,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-09-16 11:48:49,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-09-16 11:48:49,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:48:49,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-09-16 11:48:49,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-09-16 11:48:49,709 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 335 [2022-09-16 11:48:49,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 381 transitions, 1614 flow. Second operand has 19 states, 19 states have (on average 249.78947368421052) internal successors, (4746), 19 states have internal predecessors, (4746), 0 states have call successors, (0), 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 11:48:49,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:48:49,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 335 [2022-09-16 11:48:49,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:48:51,517 INFO L130 PetriNetUnfolder]: 666/8038 cut-off events. [2022-09-16 11:48:51,517 INFO L131 PetriNetUnfolder]: For 2929/2929 co-relation queries the response was YES. [2022-09-16 11:48:51,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14168 conditions, 8038 events. 666/8038 cut-off events. For 2929/2929 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 83276 event pairs, 272 based on Foata normal form. 28/7462 useless extension candidates. Maximal degree in co-relation 12361. Up to 655 conditions per place. [2022-09-16 11:48:51,576 INFO L137 encePairwiseOnDemand]: 307/335 looper letters, 201 selfloop transitions, 74 changer transitions 0/492 dead transitions. [2022-09-16 11:48:51,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 492 transitions, 2568 flow [2022-09-16 11:48:51,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-09-16 11:48:51,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-09-16 11:48:51,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 8569 transitions. [2022-09-16 11:48:51,584 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7523266022827041 [2022-09-16 11:48:51,584 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 8569 transitions. [2022-09-16 11:48:51,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 8569 transitions. [2022-09-16 11:48:51,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:48:51,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 8569 transitions. [2022-09-16 11:48:51,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 252.02941176470588) internal successors, (8569), 34 states have internal predecessors, (8569), 0 states have call successors, (0), 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 11:48:51,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 335.0) internal successors, (11725), 35 states have internal predecessors, (11725), 0 states have call successors, (0), 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 11:48:51,607 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 335.0) internal successors, (11725), 35 states have internal predecessors, (11725), 0 states have call successors, (0), 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 11:48:51,607 INFO L175 Difference]: Start difference. First operand has 381 places, 381 transitions, 1614 flow. Second operand 34 states and 8569 transitions. [2022-09-16 11:48:51,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 492 transitions, 2568 flow [2022-09-16 11:48:51,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 492 transitions, 2483 flow, removed 17 selfloop flow, removed 6 redundant places. [2022-09-16 11:48:51,637 INFO L231 Difference]: Finished difference. Result has 418 places, 395 transitions, 1793 flow [2022-09-16 11:48:51,638 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=1532, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1793, PETRI_PLACES=418, PETRI_TRANSITIONS=395} [2022-09-16 11:48:51,638 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 128 predicate places. [2022-09-16 11:48:51,638 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 395 transitions, 1793 flow [2022-09-16 11:48:51,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 249.78947368421052) internal successors, (4746), 19 states have internal predecessors, (4746), 0 states have call successors, (0), 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 11:48:51,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:48:51,639 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, 1, 1, 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 11:48:51,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-09-16 11:48:51,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-09-16 11:48:51,856 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:48:51,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:48:51,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1942424279, now seen corresponding path program 1 times [2022-09-16 11:48:51,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:48:51,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026442938] [2022-09-16 11:48:51,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:48:51,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:48:51,878 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:48:51,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343314755] [2022-09-16 11:48:51,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:48:51,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:48:51,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:48:51,880 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:48:51,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-09-16 11:48:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:48:51,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 7 conjunts are in the unsatisfiable core [2022-09-16 11:48:51,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:48:52,088 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 11:48:52,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:48:52,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:48:52,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026442938] [2022-09-16 11:48:52,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:48:52,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343314755] [2022-09-16 11:48:52,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343314755] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:48:52,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:48:52,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-09-16 11:48:52,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836471532] [2022-09-16 11:48:52,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:48:52,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-16 11:48:52,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:48:52,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-16 11:48:52,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-09-16 11:48:52,092 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 335 [2022-09-16 11:48:52,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 395 transitions, 1793 flow. Second operand has 6 states, 6 states have (on average 236.5) internal successors, (1419), 6 states have internal predecessors, (1419), 0 states have call successors, (0), 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 11:48:52,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:48:52,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 335 [2022-09-16 11:48:52,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:48:53,378 INFO L130 PetriNetUnfolder]: 436/8482 cut-off events. [2022-09-16 11:48:53,378 INFO L131 PetriNetUnfolder]: For 3171/3227 co-relation queries the response was YES. [2022-09-16 11:48:53,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13154 conditions, 8482 events. 436/8482 cut-off events. For 3171/3227 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 89583 event pairs, 126 based on Foata normal form. 52/7538 useless extension candidates. Maximal degree in co-relation 11622. Up to 1116 conditions per place. [2022-09-16 11:48:53,430 INFO L137 encePairwiseOnDemand]: 327/335 looper letters, 84 selfloop transitions, 5 changer transitions 14/413 dead transitions. [2022-09-16 11:48:53,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 413 transitions, 2021 flow [2022-09-16 11:48:53,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-16 11:48:53,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-16 11:48:53,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1685 transitions. [2022-09-16 11:48:53,431 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7185501066098081 [2022-09-16 11:48:53,432 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1685 transitions. [2022-09-16 11:48:53,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1685 transitions. [2022-09-16 11:48:53,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:48:53,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1685 transitions. [2022-09-16 11:48:53,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 240.71428571428572) internal successors, (1685), 7 states have internal predecessors, (1685), 0 states have call successors, (0), 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 11:48:53,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 335.0) internal successors, (2680), 8 states have internal predecessors, (2680), 0 states have call successors, (0), 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 11:48:53,435 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 335.0) internal successors, (2680), 8 states have internal predecessors, (2680), 0 states have call successors, (0), 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 11:48:53,435 INFO L175 Difference]: Start difference. First operand has 418 places, 395 transitions, 1793 flow. Second operand 7 states and 1685 transitions. [2022-09-16 11:48:53,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 413 transitions, 2021 flow [2022-09-16 11:48:53,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 413 transitions, 1943 flow, removed 1 selfloop flow, removed 15 redundant places. [2022-09-16 11:48:53,461 INFO L231 Difference]: Finished difference. Result has 412 places, 386 transitions, 1671 flow [2022-09-16 11:48:53,462 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1671, PETRI_PLACES=412, PETRI_TRANSITIONS=386} [2022-09-16 11:48:53,462 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 122 predicate places. [2022-09-16 11:48:53,462 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 386 transitions, 1671 flow [2022-09-16 11:48:53,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 236.5) internal successors, (1419), 6 states have internal predecessors, (1419), 0 states have call successors, (0), 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 11:48:53,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:48:53,463 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 11:48:53,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-09-16 11:48:53,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-09-16 11:48:53,675 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:48:53,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:48:53,676 INFO L85 PathProgramCache]: Analyzing trace with hash -200258300, now seen corresponding path program 2 times [2022-09-16 11:48:53,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:48:53,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637058634] [2022-09-16 11:48:53,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:48:53,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:48:53,694 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:48:53,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891341745] [2022-09-16 11:48:53,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-16 11:48:53,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:48:53,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:48:53,696 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:48:53,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-09-16 11:48:53,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-09-16 11:48:53,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-16 11:48:53,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 7 conjunts are in the unsatisfiable core [2022-09-16 11:48:53,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:48:54,732 WARN L855 $PredicateComparison]: unable to prove that (exists ((~M~0 Int) (~N~0 Int)) (let ((.cse0 (* ~N~0 ~M~0))) (and (<= .cse0 2147483647) (<= c_~L~0 .cse0)))) is different from true [2022-09-16 11:48:55,950 WARN L855 $PredicateComparison]: unable to prove that (exists ((~M~0 Int) (~N~0 Int)) (let ((.cse0 (* ~N~0 ~M~0))) (and (<= .cse0 2147483647) (<= |c_ULTIMATE.start_create_fresh_int_array_#in~size#1| .cse0)))) is different from true [2022-09-16 11:48:56,865 WARN L855 $PredicateComparison]: unable to prove that (exists ((~M~0 Int) (~N~0 Int)) (let ((.cse0 (* ~N~0 ~M~0))) (and (<= |c_ULTIMATE.start_create_fresh_int_array_~size#1| .cse0) (<= .cse0 2147483647)))) is different from true [2022-09-16 11:48:58,285 WARN L855 $PredicateComparison]: unable to prove that (exists ((~M~0 Int) (~N~0 Int)) (let ((.cse0 (* ~N~0 ~M~0))) (and (<= .cse0 2147483647) (<= (+ |c_ULTIMATE.start_create_fresh_int_array_~i~3#1| 1) .cse0)))) is different from true [2022-09-16 11:48:59,233 WARN L855 $PredicateComparison]: unable to prove that (exists ((~M~0 Int) (~N~0 Int)) (let ((.cse0 (* ~N~0 ~M~0))) (and (<= .cse0 2147483647) (<= (+ |c_ULTIMATE.start_create_fresh_int_array_#t~post27#1| 1) .cse0)))) is different from true [2022-09-16 11:48:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 20 not checked. [2022-09-16 11:48:59,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:48:59,374 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-09-16 11:48:59,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:48:59,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637058634] [2022-09-16 11:48:59,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:48:59,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891341745] [2022-09-16 11:48:59,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891341745] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:48:59,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-09-16 11:48:59,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-09-16 11:48:59,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773243878] [2022-09-16 11:48:59,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-09-16 11:48:59,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-09-16 11:48:59,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:48:59,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-09-16 11:48:59,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=48, Unknown=5, NotChecked=80, Total=156 [2022-09-16 11:48:59,378 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 335 [2022-09-16 11:48:59,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 386 transitions, 1671 flow. Second operand has 13 states, 13 states have (on average 219.0) internal successors, (2847), 13 states have internal predecessors, (2847), 0 states have call successors, (0), 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 11:48:59,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:48:59,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 335 [2022-09-16 11:48:59,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:49:14,672 WARN L233 SmtUtils]: Spent 5.69s on a formula simplification. DAG size of input: 19 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-09-16 11:49:21,839 INFO L130 PetriNetUnfolder]: 2242/14698 cut-off events. [2022-09-16 11:49:21,840 INFO L131 PetriNetUnfolder]: For 12235/12387 co-relation queries the response was YES. [2022-09-16 11:49:21,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28982 conditions, 14698 events. 2242/14698 cut-off events. For 12235/12387 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 168419 event pairs, 1794 based on Foata normal form. 154/13198 useless extension candidates. Maximal degree in co-relation 28084. Up to 4455 conditions per place. [2022-09-16 11:49:22,002 INFO L137 encePairwiseOnDemand]: 315/335 looper letters, 182 selfloop transitions, 43 changer transitions 0/422 dead transitions. [2022-09-16 11:49:22,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 422 transitions, 2221 flow [2022-09-16 11:49:22,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-16 11:49:22,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-16 11:49:22,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3112 transitions. [2022-09-16 11:49:22,004 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6635394456289979 [2022-09-16 11:49:22,005 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3112 transitions. [2022-09-16 11:49:22,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3112 transitions. [2022-09-16 11:49:22,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:49:22,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3112 transitions. [2022-09-16 11:49:22,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 222.28571428571428) internal successors, (3112), 14 states have internal predecessors, (3112), 0 states have call successors, (0), 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 11:49:22,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 335.0) internal successors, (5025), 15 states have internal predecessors, (5025), 0 states have call successors, (0), 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 11:49:22,013 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 335.0) internal successors, (5025), 15 states have internal predecessors, (5025), 0 states have call successors, (0), 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 11:49:22,013 INFO L175 Difference]: Start difference. First operand has 412 places, 386 transitions, 1671 flow. Second operand 14 states and 3112 transitions. [2022-09-16 11:49:22,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 422 transitions, 2221 flow [2022-09-16 11:49:22,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 422 transitions, 2157 flow, removed 11 selfloop flow, removed 14 redundant places. [2022-09-16 11:49:22,100 INFO L231 Difference]: Finished difference. Result has 399 places, 385 transitions, 1689 flow [2022-09-16 11:49:22,101 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1689, PETRI_PLACES=399, PETRI_TRANSITIONS=385} [2022-09-16 11:49:22,101 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 109 predicate places. [2022-09-16 11:49:22,101 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 385 transitions, 1689 flow [2022-09-16 11:49:22,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 219.0) internal successors, (2847), 13 states have internal predecessors, (2847), 0 states have call successors, (0), 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 11:49:22,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:49:22,102 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:49:22,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-09-16 11:49:22,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:22,303 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:49:22,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:49:22,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1517188225, now seen corresponding path program 1 times [2022-09-16 11:49:22,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:49:22,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064648509] [2022-09-16 11:49:22,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:22,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:49:22,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:49:22,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956530158] [2022-09-16 11:49:22,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:22,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:22,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:49:22,328 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:49:22,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-09-16 11:49:22,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:22,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 3 conjunts are in the unsatisfiable core [2022-09-16 11:49:22,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:49:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-16 11:49:22,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:49:22,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:49:22,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064648509] [2022-09-16 11:49:22,470 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:49:22,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956530158] [2022-09-16 11:49:22,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956530158] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:49:22,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:49:22,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 11:49:22,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033772408] [2022-09-16 11:49:22,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:49:22,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 11:49:22,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:49:22,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 11:49:22,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 11:49:22,472 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 335 [2022-09-16 11:49:22,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 385 transitions, 1689 flow. Second operand has 4 states, 4 states have (on average 292.5) internal successors, (1170), 4 states have internal predecessors, (1170), 0 states have call successors, (0), 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 11:49:22,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:49:22,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 335 [2022-09-16 11:49:22,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:49:24,543 INFO L130 PetriNetUnfolder]: 2190/13252 cut-off events. [2022-09-16 11:49:24,543 INFO L131 PetriNetUnfolder]: For 4047/4067 co-relation queries the response was YES. [2022-09-16 11:49:24,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21510 conditions, 13252 events. 2190/13252 cut-off events. For 4047/4067 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 164128 event pairs, 900 based on Foata normal form. 0/10826 useless extension candidates. Maximal degree in co-relation 17124. Up to 2613 conditions per place. [2022-09-16 11:49:24,612 INFO L137 encePairwiseOnDemand]: 329/335 looper letters, 41 selfloop transitions, 6 changer transitions 0/407 dead transitions. [2022-09-16 11:49:24,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 407 transitions, 1833 flow [2022-09-16 11:49:24,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 11:49:24,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 11:49:24,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1502 transitions. [2022-09-16 11:49:24,614 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8967164179104478 [2022-09-16 11:49:24,614 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1502 transitions. [2022-09-16 11:49:24,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1502 transitions. [2022-09-16 11:49:24,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:49:24,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1502 transitions. [2022-09-16 11:49:24,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 300.4) internal successors, (1502), 5 states have internal predecessors, (1502), 0 states have call successors, (0), 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 11:49:24,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 335.0) internal successors, (2010), 6 states have internal predecessors, (2010), 0 states have call successors, (0), 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 11:49:24,617 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 335.0) internal successors, (2010), 6 states have internal predecessors, (2010), 0 states have call successors, (0), 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 11:49:24,618 INFO L175 Difference]: Start difference. First operand has 399 places, 385 transitions, 1689 flow. Second operand 5 states and 1502 transitions. [2022-09-16 11:49:24,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 407 transitions, 1833 flow [2022-09-16 11:49:24,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 407 transitions, 1764 flow, removed 0 selfloop flow, removed 10 redundant places. [2022-09-16 11:49:24,639 INFO L231 Difference]: Finished difference. Result has 397 places, 389 transitions, 1662 flow [2022-09-16 11:49:24,639 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=1620, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1662, PETRI_PLACES=397, PETRI_TRANSITIONS=389} [2022-09-16 11:49:24,640 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 107 predicate places. [2022-09-16 11:49:24,640 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 389 transitions, 1662 flow [2022-09-16 11:49:24,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 292.5) internal successors, (1170), 4 states have internal predecessors, (1170), 0 states have call successors, (0), 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 11:49:24,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:49:24,640 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:49:24,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-09-16 11:49:24,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:24,847 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:49:24,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:49:24,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1517189219, now seen corresponding path program 1 times [2022-09-16 11:49:24,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:49:24,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255882599] [2022-09-16 11:49:24,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:24,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:49:24,981 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:49:24,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336746959] [2022-09-16 11:49:24,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:24,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:24,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:49:24,988 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:49:24,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-09-16 11:49:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:25,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 6 conjunts are in the unsatisfiable core [2022-09-16 11:49:25,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:49:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:49:25,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:49:25,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:49:25,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255882599] [2022-09-16 11:49:25,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:49:25,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336746959] [2022-09-16 11:49:25,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336746959] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:49:25,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:49:25,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-09-16 11:49:25,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112245770] [2022-09-16 11:49:25,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:49:25,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-16 11:49:25,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:49:25,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-16 11:49:25,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-09-16 11:49:25,214 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 335 [2022-09-16 11:49:25,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 389 transitions, 1662 flow. Second operand has 7 states, 7 states have (on average 246.0) internal successors, (1722), 7 states have internal predecessors, (1722), 0 states have call successors, (0), 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 11:49:25,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:49:25,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 335 [2022-09-16 11:49:25,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:49:28,569 INFO L130 PetriNetUnfolder]: 1810/16634 cut-off events. [2022-09-16 11:49:28,570 INFO L131 PetriNetUnfolder]: For 6172/6208 co-relation queries the response was YES. [2022-09-16 11:49:28,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29039 conditions, 16634 events. 1810/16634 cut-off events. For 6172/6208 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 212875 event pairs, 1200 based on Foata normal form. 0/14652 useless extension candidates. Maximal degree in co-relation 22387. Up to 4252 conditions per place. [2022-09-16 11:49:28,677 INFO L137 encePairwiseOnDemand]: 325/335 looper letters, 208 selfloop transitions, 38 changer transitions 0/486 dead transitions. [2022-09-16 11:49:28,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 486 transitions, 2545 flow [2022-09-16 11:49:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-09-16 11:49:28,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-09-16 11:49:28,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2801 transitions. [2022-09-16 11:49:28,681 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7601085481682497 [2022-09-16 11:49:28,681 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2801 transitions. [2022-09-16 11:49:28,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2801 transitions. [2022-09-16 11:49:28,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:49:28,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2801 transitions. [2022-09-16 11:49:28,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 254.63636363636363) internal successors, (2801), 11 states have internal predecessors, (2801), 0 states have call successors, (0), 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 11:49:28,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 335.0) internal successors, (4020), 12 states have internal predecessors, (4020), 0 states have call successors, (0), 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 11:49:28,687 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 335.0) internal successors, (4020), 12 states have internal predecessors, (4020), 0 states have call successors, (0), 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 11:49:28,688 INFO L175 Difference]: Start difference. First operand has 397 places, 389 transitions, 1662 flow. Second operand 11 states and 2801 transitions. [2022-09-16 11:49:28,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 486 transitions, 2545 flow [2022-09-16 11:49:28,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 486 transitions, 2545 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-16 11:49:28,738 INFO L231 Difference]: Finished difference. Result has 412 places, 405 transitions, 1888 flow [2022-09-16 11:49:28,739 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=1662, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1888, PETRI_PLACES=412, PETRI_TRANSITIONS=405} [2022-09-16 11:49:28,739 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 122 predicate places. [2022-09-16 11:49:28,739 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 405 transitions, 1888 flow [2022-09-16 11:49:28,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 246.0) internal successors, (1722), 7 states have internal predecessors, (1722), 0 states have call successors, (0), 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 11:49:28,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:49:28,740 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:49:28,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-09-16 11:49:28,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:28,956 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:49:28,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:49:28,956 INFO L85 PathProgramCache]: Analyzing trace with hash -211804433, now seen corresponding path program 1 times [2022-09-16 11:49:28,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:49:28,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948780678] [2022-09-16 11:49:28,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:28,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:49:28,970 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:49:28,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853869308] [2022-09-16 11:49:28,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:28,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:28,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:49:28,972 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:49:28,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-09-16 11:49:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:29,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 3 conjunts are in the unsatisfiable core [2022-09-16 11:49:29,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:49:29,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-16 11:49:29,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:49:29,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:49:29,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948780678] [2022-09-16 11:49:29,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:49:29,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853869308] [2022-09-16 11:49:29,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853869308] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:49:29,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:49:29,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 11:49:29,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659834519] [2022-09-16 11:49:29,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:49:29,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 11:49:29,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:49:29,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 11:49:29,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 11:49:29,151 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 335 [2022-09-16 11:49:29,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 405 transitions, 1888 flow. Second operand has 4 states, 4 states have (on average 292.75) internal successors, (1171), 4 states have internal predecessors, (1171), 0 states have call successors, (0), 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 11:49:29,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:49:29,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 335 [2022-09-16 11:49:29,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:49:32,260 INFO L130 PetriNetUnfolder]: 2560/17726 cut-off events. [2022-09-16 11:49:32,260 INFO L131 PetriNetUnfolder]: For 7545/7581 co-relation queries the response was YES. [2022-09-16 11:49:32,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30925 conditions, 17726 events. 2560/17726 cut-off events. For 7545/7581 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 228907 event pairs, 1250 based on Foata normal form. 288/15804 useless extension candidates. Maximal degree in co-relation 23889. Up to 3840 conditions per place. [2022-09-16 11:49:32,379 INFO L137 encePairwiseOnDemand]: 331/335 looper letters, 23 selfloop transitions, 6 changer transitions 0/405 dead transitions. [2022-09-16 11:49:32,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 405 transitions, 1942 flow [2022-09-16 11:49:32,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-16 11:49:32,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-16 11:49:32,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1190 transitions. [2022-09-16 11:49:32,380 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8880597014925373 [2022-09-16 11:49:32,380 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1190 transitions. [2022-09-16 11:49:32,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1190 transitions. [2022-09-16 11:49:32,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:49:32,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1190 transitions. [2022-09-16 11:49:32,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 297.5) internal successors, (1190), 4 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 11:49:32,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 335.0) internal successors, (1675), 5 states have internal predecessors, (1675), 0 states have call successors, (0), 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 11:49:32,383 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 335.0) internal successors, (1675), 5 states have internal predecessors, (1675), 0 states have call successors, (0), 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 11:49:32,383 INFO L175 Difference]: Start difference. First operand has 412 places, 405 transitions, 1888 flow. Second operand 4 states and 1190 transitions. [2022-09-16 11:49:32,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 405 transitions, 1942 flow [2022-09-16 11:49:32,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 405 transitions, 1926 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-09-16 11:49:32,424 INFO L231 Difference]: Finished difference. Result has 410 places, 403 transitions, 1874 flow [2022-09-16 11:49:32,424 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1874, PETRI_PLACES=410, PETRI_TRANSITIONS=403} [2022-09-16 11:49:32,425 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 120 predicate places. [2022-09-16 11:49:32,425 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 403 transitions, 1874 flow [2022-09-16 11:49:32,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 292.75) internal successors, (1171), 4 states have internal predecessors, (1171), 0 states have call successors, (0), 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 11:49:32,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:49:32,425 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:49:32,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-09-16 11:49:32,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:32,630 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:49:32,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:49:32,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1008598400, now seen corresponding path program 2 times [2022-09-16 11:49:32,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:49:32,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447253090] [2022-09-16 11:49:32,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:32,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:49:32,651 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:49:32,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700318294] [2022-09-16 11:49:32,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-16 11:49:32,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:32,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:49:32,656 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:49:32,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-09-16 11:49:32,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-09-16 11:49:32,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-16 11:49:32,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 11:49:32,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:49:33,802 WARN L855 $PredicateComparison]: unable to prove that (exists ((~M~0 Int) (~N~0 Int)) (let ((.cse0 (* ~N~0 ~M~0))) (and (<= .cse0 2147483647) (<= c_~L~0 .cse0)))) is different from true [2022-09-16 11:49:35,427 WARN L855 $PredicateComparison]: unable to prove that (exists ((~M~0 Int) (~N~0 Int)) (let ((.cse0 (* ~N~0 ~M~0))) (and (<= (+ c_thread1Thread1of1ForFork1_~i~0 1) .cse0) (<= .cse0 2147483647)))) is different from true [2022-09-16 11:49:36,414 WARN L855 $PredicateComparison]: unable to prove that (exists ((~M~0 Int) (~N~0 Int)) (let ((.cse0 (* ~N~0 ~M~0))) (and (<= .cse0 2147483647) (<= (+ |c_thread1Thread1of1ForFork1_#t~post1| 1) .cse0)))) is different from true [2022-09-16 11:49:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 5 not checked. [2022-09-16 11:49:36,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:49:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-09-16 11:49:36,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:49:36,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447253090] [2022-09-16 11:49:36,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:49:36,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700318294] [2022-09-16 11:49:36,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700318294] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:49:36,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-09-16 11:49:36,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-09-16 11:49:36,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303282580] [2022-09-16 11:49:36,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-09-16 11:49:36,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-09-16 11:49:36,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:49:36,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-09-16 11:49:36,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=24, Unknown=3, NotChecked=30, Total=72 [2022-09-16 11:49:36,543 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 335 [2022-09-16 11:49:36,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 403 transitions, 1874 flow. Second operand has 9 states, 9 states have (on average 256.77777777777777) internal successors, (2311), 9 states have internal predecessors, (2311), 0 states have call successors, (0), 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 11:49:36,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:49:36,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 335 [2022-09-16 11:49:36,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:49:55,852 WARN L233 SmtUtils]: Spent 5.00s on a formula simplification. DAG size of input: 20 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-09-16 11:50:08,299 INFO L130 PetriNetUnfolder]: 12136/44864 cut-off events. [2022-09-16 11:50:08,300 INFO L131 PetriNetUnfolder]: For 32925/33289 co-relation queries the response was YES. [2022-09-16 11:50:08,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95721 conditions, 44864 events. 12136/44864 cut-off events. For 32925/33289 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 553029 event pairs, 7000 based on Foata normal form. 686/40238 useless extension candidates. Maximal degree in co-relation 72966. Up to 12056 conditions per place. [2022-09-16 11:50:09,066 INFO L137 encePairwiseOnDemand]: 322/335 looper letters, 124 selfloop transitions, 24 changer transitions 3/476 dead transitions. [2022-09-16 11:50:09,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 476 transitions, 2415 flow [2022-09-16 11:50:09,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-09-16 11:50:09,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-09-16 11:50:09,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3140 transitions. [2022-09-16 11:50:09,072 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7810945273631841 [2022-09-16 11:50:09,072 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3140 transitions. [2022-09-16 11:50:09,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3140 transitions. [2022-09-16 11:50:09,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:50:09,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3140 transitions. [2022-09-16 11:50:09,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 261.6666666666667) internal successors, (3140), 12 states have internal predecessors, (3140), 0 states have call successors, (0), 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 11:50:09,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 335.0) internal successors, (4355), 13 states have internal predecessors, (4355), 0 states have call successors, (0), 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 11:50:09,084 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 335.0) internal successors, (4355), 13 states have internal predecessors, (4355), 0 states have call successors, (0), 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 11:50:09,084 INFO L175 Difference]: Start difference. First operand has 410 places, 403 transitions, 1874 flow. Second operand 12 states and 3140 transitions. [2022-09-16 11:50:09,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 476 transitions, 2415 flow [2022-09-16 11:50:09,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 476 transitions, 2403 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-16 11:50:09,441 INFO L231 Difference]: Finished difference. Result has 423 places, 417 transitions, 2024 flow [2022-09-16 11:50:09,441 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2024, PETRI_PLACES=423, PETRI_TRANSITIONS=417} [2022-09-16 11:50:09,442 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 133 predicate places. [2022-09-16 11:50:09,442 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 417 transitions, 2024 flow [2022-09-16 11:50:09,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 256.77777777777777) internal successors, (2311), 9 states have internal predecessors, (2311), 0 states have call successors, (0), 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 11:50:09,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:50:09,442 INFO L208 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:50:09,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-09-16 11:50:09,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:50:09,643 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:50:09,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:50:09,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1725042474, now seen corresponding path program 1 times [2022-09-16 11:50:09,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:50:09,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329841381] [2022-09-16 11:50:09,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:50:09,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:50:09,662 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:50:09,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982318398] [2022-09-16 11:50:09,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:50:09,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:50:09,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:50:09,664 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:50:09,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-09-16 11:50:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:50:09,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-16 11:50:09,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:50:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:50:09,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:50:09,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:50:09,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:50:09,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329841381] [2022-09-16 11:50:09,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:50:09,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982318398] [2022-09-16 11:50:09,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982318398] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:50:09,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-09-16 11:50:09,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-09-16 11:50:09,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854015105] [2022-09-16 11:50:09,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-09-16 11:50:09,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-09-16 11:50:09,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:50:09,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-09-16 11:50:09,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-09-16 11:50:09,987 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 335 [2022-09-16 11:50:09,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 417 transitions, 2024 flow. Second operand has 12 states, 12 states have (on average 265.25) internal successors, (3183), 12 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 11:50:09,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:50:09,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 335 [2022-09-16 11:50:09,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:50:15,544 INFO L130 PetriNetUnfolder]: 3556/25710 cut-off events. [2022-09-16 11:50:15,544 INFO L131 PetriNetUnfolder]: For 12299/12367 co-relation queries the response was YES. [2022-09-16 11:50:15,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46404 conditions, 25710 events. 3556/25710 cut-off events. For 12299/12367 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 358045 event pairs, 1970 based on Foata normal form. 86/22572 useless extension candidates. Maximal degree in co-relation 35924. Up to 6049 conditions per place. [2022-09-16 11:50:15,901 INFO L137 encePairwiseOnDemand]: 320/335 looper letters, 83 selfloop transitions, 19 changer transitions 0/462 dead transitions. [2022-09-16 11:50:15,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 462 transitions, 2364 flow [2022-09-16 11:50:15,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-09-16 11:50:15,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-09-16 11:50:15,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4554 transitions. [2022-09-16 11:50:15,905 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7996488147497806 [2022-09-16 11:50:15,905 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4554 transitions. [2022-09-16 11:50:15,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4554 transitions. [2022-09-16 11:50:15,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:50:15,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4554 transitions. [2022-09-16 11:50:15,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 267.88235294117646) internal successors, (4554), 17 states have internal predecessors, (4554), 0 states have call successors, (0), 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 11:50:15,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 335.0) internal successors, (6030), 18 states have internal predecessors, (6030), 0 states have call successors, (0), 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 11:50:15,911 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 335.0) internal successors, (6030), 18 states have internal predecessors, (6030), 0 states have call successors, (0), 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 11:50:15,911 INFO L175 Difference]: Start difference. First operand has 423 places, 417 transitions, 2024 flow. Second operand 17 states and 4554 transitions. [2022-09-16 11:50:15,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 462 transitions, 2364 flow [2022-09-16 11:50:15,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 462 transitions, 2334 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-09-16 11:50:15,989 INFO L231 Difference]: Finished difference. Result has 443 places, 428 transitions, 2109 flow [2022-09-16 11:50:15,990 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=1994, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2109, PETRI_PLACES=443, PETRI_TRANSITIONS=428} [2022-09-16 11:50:15,990 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 153 predicate places. [2022-09-16 11:50:15,990 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 428 transitions, 2109 flow [2022-09-16 11:50:15,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 265.25) internal successors, (3183), 12 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 11:50:15,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:50:15,991 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:50:16,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-09-16 11:50:16,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:50:16,323 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:50:16,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:50:16,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1506973979, now seen corresponding path program 1 times [2022-09-16 11:50:16,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:50:16,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126649744] [2022-09-16 11:50:16,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:50:16,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:50:16,336 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:50:16,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315155620] [2022-09-16 11:50:16,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:50:16,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:50:16,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:50:16,364 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:50:16,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-09-16 11:50:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:50:16,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-16 11:50:16,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:50:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-16 11:50:16,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:50:16,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:50:16,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126649744] [2022-09-16 11:50:16,592 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:50:16,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315155620] [2022-09-16 11:50:16,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315155620] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:50:16,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:50:16,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-16 11:50:16,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871497646] [2022-09-16 11:50:16,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:50:16,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-16 11:50:16,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:50:16,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-16 11:50:16,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-09-16 11:50:16,595 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 335 [2022-09-16 11:50:16,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 428 transitions, 2109 flow. Second operand has 5 states, 5 states have (on average 285.4) internal successors, (1427), 5 states have internal predecessors, (1427), 0 states have call successors, (0), 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 11:50:16,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:50:16,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 335 [2022-09-16 11:50:16,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:50:18,851 INFO L130 PetriNetUnfolder]: 546/12211 cut-off events. [2022-09-16 11:50:18,851 INFO L131 PetriNetUnfolder]: For 6893/6933 co-relation queries the response was YES. [2022-09-16 11:50:18,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20881 conditions, 12211 events. 546/12211 cut-off events. For 6893/6933 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 139109 event pairs, 255 based on Foata normal form. 14/11229 useless extension candidates. Maximal degree in co-relation 19499. Up to 1473 conditions per place. [2022-09-16 11:50:18,960 INFO L137 encePairwiseOnDemand]: 327/335 looper letters, 45 selfloop transitions, 7 changer transitions 0/438 dead transitions. [2022-09-16 11:50:18,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 438 transitions, 2262 flow [2022-09-16 11:50:18,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-09-16 11:50:18,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-09-16 11:50:18,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1729 transitions. [2022-09-16 11:50:18,963 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8601990049751244 [2022-09-16 11:50:18,963 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1729 transitions. [2022-09-16 11:50:18,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1729 transitions. [2022-09-16 11:50:18,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:50:18,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1729 transitions. [2022-09-16 11:50:18,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 288.1666666666667) internal successors, (1729), 6 states have internal predecessors, (1729), 0 states have call successors, (0), 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 11:50:18,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 335.0) internal successors, (2345), 7 states have internal predecessors, (2345), 0 states have call successors, (0), 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 11:50:18,966 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 335.0) internal successors, (2345), 7 states have internal predecessors, (2345), 0 states have call successors, (0), 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 11:50:18,966 INFO L175 Difference]: Start difference. First operand has 443 places, 428 transitions, 2109 flow. Second operand 6 states and 1729 transitions. [2022-09-16 11:50:18,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 438 transitions, 2262 flow [2022-09-16 11:50:19,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 438 transitions, 2239 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-09-16 11:50:19,024 INFO L231 Difference]: Finished difference. Result has 444 places, 429 transitions, 2119 flow [2022-09-16 11:50:19,025 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=2090, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2119, PETRI_PLACES=444, PETRI_TRANSITIONS=429} [2022-09-16 11:50:19,025 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 154 predicate places. [2022-09-16 11:50:19,025 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 429 transitions, 2119 flow [2022-09-16 11:50:19,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 285.4) internal successors, (1427), 5 states have internal predecessors, (1427), 0 states have call successors, (0), 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 11:50:19,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:50:19,025 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:50:19,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-09-16 11:50:19,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-09-16 11:50:19,226 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:50:19,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:50:19,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1703167644, now seen corresponding path program 1 times [2022-09-16 11:50:19,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:50:19,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965282559] [2022-09-16 11:50:19,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:50:19,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:50:19,239 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:50:19,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586944265] [2022-09-16 11:50:19,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:50:19,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:50:19,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:50:19,240 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:50:19,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-09-16 11:50:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:50:19,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 3 conjunts are in the unsatisfiable core [2022-09-16 11:50:19,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:50:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-16 11:50:19,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:50:19,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:50:19,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965282559] [2022-09-16 11:50:19,398 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:50:19,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586944265] [2022-09-16 11:50:19,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586944265] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:50:19,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:50:19,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-16 11:50:19,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505652163] [2022-09-16 11:50:19,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:50:19,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-16 11:50:19,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:50:19,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-16 11:50:19,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-16 11:50:19,400 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 335 [2022-09-16 11:50:19,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 429 transitions, 2119 flow. Second operand has 3 states, 3 states have (on average 298.0) internal successors, (894), 3 states have internal predecessors, (894), 0 states have call successors, (0), 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 11:50:19,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:50:19,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 335 [2022-09-16 11:50:19,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:50:22,161 INFO L130 PetriNetUnfolder]: 1366/12973 cut-off events. [2022-09-16 11:50:22,162 INFO L131 PetriNetUnfolder]: For 8078/8118 co-relation queries the response was YES. [2022-09-16 11:50:22,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23204 conditions, 12973 events. 1366/12973 cut-off events. For 8078/8118 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 154321 event pairs, 475 based on Foata normal form. 134/11811 useless extension candidates. Maximal degree in co-relation 21861. Up to 1686 conditions per place. [2022-09-16 11:50:22,271 INFO L137 encePairwiseOnDemand]: 331/335 looper letters, 36 selfloop transitions, 5 changer transitions 0/439 dead transitions. [2022-09-16 11:50:22,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 439 transitions, 2221 flow [2022-09-16 11:50:22,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-16 11:50:22,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-16 11:50:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 923 transitions. [2022-09-16 11:50:22,273 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.918407960199005 [2022-09-16 11:50:22,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 923 transitions. [2022-09-16 11:50:22,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 923 transitions. [2022-09-16 11:50:22,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:50:22,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 923 transitions. [2022-09-16 11:50:22,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 307.6666666666667) internal successors, (923), 3 states have internal predecessors, (923), 0 states have call successors, (0), 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 11:50:22,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 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 11:50:22,275 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 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 11:50:22,275 INFO L175 Difference]: Start difference. First operand has 444 places, 429 transitions, 2119 flow. Second operand 3 states and 923 transitions. [2022-09-16 11:50:22,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 439 transitions, 2221 flow [2022-09-16 11:50:22,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 439 transitions, 2212 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-16 11:50:22,338 INFO L231 Difference]: Finished difference. Result has 444 places, 427 transitions, 2117 flow [2022-09-16 11:50:22,339 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=2098, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2117, PETRI_PLACES=444, PETRI_TRANSITIONS=427} [2022-09-16 11:50:22,339 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 154 predicate places. [2022-09-16 11:50:22,339 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 427 transitions, 2117 flow [2022-09-16 11:50:22,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 298.0) internal successors, (894), 3 states have internal predecessors, (894), 0 states have call successors, (0), 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 11:50:22,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:50:22,340 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:50:22,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-09-16 11:50:22,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-09-16 11:50:22,568 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:50:22,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:50:22,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1654232383, now seen corresponding path program 1 times [2022-09-16 11:50:22,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:50:22,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218565808] [2022-09-16 11:50:22,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:50:22,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:50:22,581 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:50:22,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969565673] [2022-09-16 11:50:22,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:50:22,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:50:22,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:50:22,582 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:50:22,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-09-16 11:50:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:50:22,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 11:50:22,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:50:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-09-16 11:50:22,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:50:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-09-16 11:50:22,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:50:22,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218565808] [2022-09-16 11:50:22,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:50:22,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969565673] [2022-09-16 11:50:22,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969565673] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:50:22,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-09-16 11:50:22,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-09-16 11:50:22,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346260855] [2022-09-16 11:50:22,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-09-16 11:50:22,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-16 11:50:22,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:50:22,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-16 11:50:22,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-09-16 11:50:22,819 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 335 [2022-09-16 11:50:22,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 427 transitions, 2117 flow. Second operand has 10 states, 10 states have (on average 302.1) internal successors, (3021), 10 states have internal predecessors, (3021), 0 states have call successors, (0), 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 11:50:22,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:50:22,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 335 [2022-09-16 11:50:22,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:50:26,006 INFO L130 PetriNetUnfolder]: 1100/13963 cut-off events. [2022-09-16 11:50:26,006 INFO L131 PetriNetUnfolder]: For 15850/16326 co-relation queries the response was YES. [2022-09-16 11:50:26,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28920 conditions, 13963 events. 1100/13963 cut-off events. For 15850/16326 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 160115 event pairs, 84 based on Foata normal form. 162/13107 useless extension candidates. Maximal degree in co-relation 27477. Up to 1045 conditions per place. [2022-09-16 11:50:26,180 INFO L137 encePairwiseOnDemand]: 329/335 looper letters, 90 selfloop transitions, 31 changer transitions 0/509 dead transitions. [2022-09-16 11:50:26,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 509 transitions, 2812 flow [2022-09-16 11:50:26,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-16 11:50:26,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-16 11:50:26,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4259 transitions. [2022-09-16 11:50:26,183 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9081023454157783 [2022-09-16 11:50:26,183 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4259 transitions. [2022-09-16 11:50:26,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4259 transitions. [2022-09-16 11:50:26,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:50:26,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4259 transitions. [2022-09-16 11:50:26,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 304.2142857142857) internal successors, (4259), 14 states have internal predecessors, (4259), 0 states have call successors, (0), 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 11:50:26,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 335.0) internal successors, (5025), 15 states have internal predecessors, (5025), 0 states have call successors, (0), 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 11:50:26,190 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 335.0) internal successors, (5025), 15 states have internal predecessors, (5025), 0 states have call successors, (0), 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 11:50:26,190 INFO L175 Difference]: Start difference. First operand has 444 places, 427 transitions, 2117 flow. Second operand 14 states and 4259 transitions. [2022-09-16 11:50:26,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 509 transitions, 2812 flow [2022-09-16 11:50:26,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 509 transitions, 2798 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-09-16 11:50:26,272 INFO L231 Difference]: Finished difference. Result has 459 places, 444 transitions, 2304 flow [2022-09-16 11:50:26,273 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=2103, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2304, PETRI_PLACES=459, PETRI_TRANSITIONS=444} [2022-09-16 11:50:26,273 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 169 predicate places. [2022-09-16 11:50:26,273 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 444 transitions, 2304 flow [2022-09-16 11:50:26,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 302.1) internal successors, (3021), 10 states have internal predecessors, (3021), 0 states have call successors, (0), 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 11:50:26,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:50:26,274 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:50:26,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-09-16 11:50:26,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-09-16 11:50:26,475 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:50:26,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:50:26,475 INFO L85 PathProgramCache]: Analyzing trace with hash -361538905, now seen corresponding path program 1 times [2022-09-16 11:50:26,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:50:26,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605464765] [2022-09-16 11:50:26,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:50:26,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:50:26,487 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:50:26,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274749875] [2022-09-16 11:50:26,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:50:26,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:50:26,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:50:26,488 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:50:26,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-09-16 11:50:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:50:26,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 3 conjunts are in the unsatisfiable core [2022-09-16 11:50:26,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:50:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-16 11:50:26,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:50:26,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:50:26,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605464765] [2022-09-16 11:50:26,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:50:26,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274749875] [2022-09-16 11:50:26,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274749875] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:50:26,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:50:26,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 11:50:26,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792132488] [2022-09-16 11:50:26,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:50:26,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 11:50:26,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:50:26,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 11:50:26,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-09-16 11:50:26,642 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 335 [2022-09-16 11:50:26,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 444 transitions, 2304 flow. Second operand has 4 states, 4 states have (on average 274.5) internal successors, (1098), 4 states have internal predecessors, (1098), 0 states have call successors, (0), 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 11:50:26,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:50:26,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 335 [2022-09-16 11:50:26,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:50:32,657 INFO L130 PetriNetUnfolder]: 4340/25011 cut-off events. [2022-09-16 11:50:32,657 INFO L131 PetriNetUnfolder]: For 15790/15872 co-relation queries the response was YES. [2022-09-16 11:50:33,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48846 conditions, 25011 events. 4340/25011 cut-off events. For 15790/15872 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 342014 event pairs, 1936 based on Foata normal form. 6/20782 useless extension candidates. Maximal degree in co-relation 46950. Up to 6725 conditions per place. [2022-09-16 11:50:33,052 INFO L137 encePairwiseOnDemand]: 331/335 looper letters, 90 selfloop transitions, 5 changer transitions 0/479 dead transitions. [2022-09-16 11:50:33,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 479 transitions, 2621 flow [2022-09-16 11:50:33,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-16 11:50:33,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-16 11:50:33,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1152 transitions. [2022-09-16 11:50:33,054 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8597014925373134 [2022-09-16 11:50:33,054 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1152 transitions. [2022-09-16 11:50:33,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1152 transitions. [2022-09-16 11:50:33,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:50:33,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1152 transitions. [2022-09-16 11:50:33,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 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 11:50:33,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 335.0) internal successors, (1675), 5 states have internal predecessors, (1675), 0 states have call successors, (0), 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 11:50:33,056 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 335.0) internal successors, (1675), 5 states have internal predecessors, (1675), 0 states have call successors, (0), 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 11:50:33,056 INFO L175 Difference]: Start difference. First operand has 459 places, 444 transitions, 2304 flow. Second operand 4 states and 1152 transitions. [2022-09-16 11:50:33,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 479 transitions, 2621 flow [2022-09-16 11:50:33,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 479 transitions, 2551 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-09-16 11:50:33,144 INFO L231 Difference]: Finished difference. Result has 460 places, 447 transitions, 2272 flow [2022-09-16 11:50:33,144 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=2234, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2272, PETRI_PLACES=460, PETRI_TRANSITIONS=447} [2022-09-16 11:50:33,145 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 170 predicate places. [2022-09-16 11:50:33,145 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 447 transitions, 2272 flow [2022-09-16 11:50:33,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 274.5) internal successors, (1098), 4 states have internal predecessors, (1098), 0 states have call successors, (0), 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 11:50:33,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:50:33,145 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:50:33,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-09-16 11:50:33,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-09-16 11:50:33,350 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:50:33,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:50:33,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1677196689, now seen corresponding path program 1 times [2022-09-16 11:50:33,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:50:33,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263440196] [2022-09-16 11:50:33,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:50:33,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:50:33,363 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:50:33,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988917697] [2022-09-16 11:50:33,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:50:33,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:50:33,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:50:33,365 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:50:33,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-09-16 11:50:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:50:33,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 3 conjunts are in the unsatisfiable core [2022-09-16 11:50:33,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:50:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-16 11:50:33,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:50:33,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:50:33,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263440196] [2022-09-16 11:50:33,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:50:33,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988917697] [2022-09-16 11:50:33,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988917697] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:50:33,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:50:33,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 11:50:33,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524701800] [2022-09-16 11:50:33,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:50:33,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 11:50:33,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:50:33,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 11:50:33,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-09-16 11:50:33,555 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 335 [2022-09-16 11:50:33,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 447 transitions, 2272 flow. Second operand has 4 states, 4 states have (on average 274.75) internal successors, (1099), 4 states have internal predecessors, (1099), 0 states have call successors, (0), 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 11:50:33,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:50:33,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 335 [2022-09-16 11:50:33,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:50:39,809 INFO L130 PetriNetUnfolder]: 4244/24783 cut-off events. [2022-09-16 11:50:39,809 INFO L131 PetriNetUnfolder]: For 16418/16500 co-relation queries the response was YES. [2022-09-16 11:50:40,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49364 conditions, 24783 events. 4244/24783 cut-off events. For 16418/16500 co-relation queries the response was YES. Maximal size of possible extension queue 947. Compared 338651 event pairs, 1936 based on Foata normal form. 6/20878 useless extension candidates. Maximal degree in co-relation 47536. Up to 6725 conditions per place. [2022-09-16 11:50:40,361 INFO L137 encePairwiseOnDemand]: 330/335 looper letters, 88 selfloop transitions, 6 changer transitions 0/478 dead transitions. [2022-09-16 11:50:40,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 478 transitions, 2575 flow [2022-09-16 11:50:40,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-16 11:50:40,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-16 11:50:40,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1151 transitions. [2022-09-16 11:50:40,363 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.858955223880597 [2022-09-16 11:50:40,363 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1151 transitions. [2022-09-16 11:50:40,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1151 transitions. [2022-09-16 11:50:40,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:50:40,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1151 transitions. [2022-09-16 11:50:40,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 287.75) internal successors, (1151), 4 states have internal predecessors, (1151), 0 states have call successors, (0), 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 11:50:40,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 335.0) internal successors, (1675), 5 states have internal predecessors, (1675), 0 states have call successors, (0), 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 11:50:40,373 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 335.0) internal successors, (1675), 5 states have internal predecessors, (1675), 0 states have call successors, (0), 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 11:50:40,373 INFO L175 Difference]: Start difference. First operand has 460 places, 447 transitions, 2272 flow. Second operand 4 states and 1151 transitions. [2022-09-16 11:50:40,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 478 transitions, 2575 flow [2022-09-16 11:50:40,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 478 transitions, 2571 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-09-16 11:50:40,542 INFO L231 Difference]: Finished difference. Result has 465 places, 449 transitions, 2300 flow [2022-09-16 11:50:40,542 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=2268, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2300, PETRI_PLACES=465, PETRI_TRANSITIONS=449} [2022-09-16 11:50:40,565 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 175 predicate places. [2022-09-16 11:50:40,565 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 449 transitions, 2300 flow [2022-09-16 11:50:40,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 274.75) internal successors, (1099), 4 states have internal predecessors, (1099), 0 states have call successors, (0), 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 11:50:40,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:50:40,566 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:50:40,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-09-16 11:50:40,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-09-16 11:50:40,767 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:50:40,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:50:40,768 INFO L85 PathProgramCache]: Analyzing trace with hash -2098941051, now seen corresponding path program 1 times [2022-09-16 11:50:40,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:50:40,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614432489] [2022-09-16 11:50:40,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:50:40,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:50:40,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:50:40,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305039629] [2022-09-16 11:50:40,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:50:40,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:50:40,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:50:40,811 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:50:40,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-09-16 11:50:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:50:41,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 11:50:41,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:50:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:50:41,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:50:41,266 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:50:41,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:50:41,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614432489] [2022-09-16 11:50:41,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:50:41,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305039629] [2022-09-16 11:50:41,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305039629] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:50:41,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-09-16 11:50:41,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-09-16 11:50:41,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180467988] [2022-09-16 11:50:41,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-09-16 11:50:41,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-16 11:50:41,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:50:41,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-16 11:50:41,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-09-16 11:50:41,270 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 335 [2022-09-16 11:50:41,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 449 transitions, 2300 flow. Second operand has 10 states, 10 states have (on average 301.5) internal successors, (3015), 10 states have internal predecessors, (3015), 0 states have call successors, (0), 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 11:50:41,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:50:41,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 335 [2022-09-16 11:50:41,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:50:48,237 INFO L130 PetriNetUnfolder]: 456/29430 cut-off events. [2022-09-16 11:50:48,238 INFO L131 PetriNetUnfolder]: For 13364/13808 co-relation queries the response was YES. [2022-09-16 11:50:48,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45545 conditions, 29430 events. 456/29430 cut-off events. For 13364/13808 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 389988 event pairs, 0 based on Foata normal form. 87/27015 useless extension candidates. Maximal degree in co-relation 43750. Up to 640 conditions per place. [2022-09-16 11:50:48,799 INFO L137 encePairwiseOnDemand]: 329/335 looper letters, 46 selfloop transitions, 15 changer transitions 0/486 dead transitions. [2022-09-16 11:50:48,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 486 transitions, 2565 flow [2022-09-16 11:50:48,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-16 11:50:48,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-16 11:50:48,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4249 transitions. [2022-09-16 11:50:48,803 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9059701492537313 [2022-09-16 11:50:48,803 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4249 transitions. [2022-09-16 11:50:48,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4249 transitions. [2022-09-16 11:50:48,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:50:48,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4249 transitions. [2022-09-16 11:50:48,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 303.5) internal successors, (4249), 14 states have internal predecessors, (4249), 0 states have call successors, (0), 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 11:50:48,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 335.0) internal successors, (5025), 15 states have internal predecessors, (5025), 0 states have call successors, (0), 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 11:50:48,811 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 335.0) internal successors, (5025), 15 states have internal predecessors, (5025), 0 states have call successors, (0), 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 11:50:48,811 INFO L175 Difference]: Start difference. First operand has 465 places, 449 transitions, 2300 flow. Second operand 14 states and 4249 transitions. [2022-09-16 11:50:48,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 486 transitions, 2565 flow [2022-09-16 11:50:48,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 486 transitions, 2561 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 11:50:48,953 INFO L231 Difference]: Finished difference. Result has 481 places, 457 transitions, 2382 flow [2022-09-16 11:50:48,953 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=2296, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2382, PETRI_PLACES=481, PETRI_TRANSITIONS=457} [2022-09-16 11:50:48,954 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 191 predicate places. [2022-09-16 11:50:48,954 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 457 transitions, 2382 flow [2022-09-16 11:50:48,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 301.5) internal successors, (3015), 10 states have internal predecessors, (3015), 0 states have call successors, (0), 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 11:50:48,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:50:48,955 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:50:48,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-09-16 11:50:49,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:50:49,166 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:50:49,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:50:49,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1827288375, now seen corresponding path program 1 times [2022-09-16 11:50:49,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:50:49,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624650367] [2022-09-16 11:50:49,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:50:49,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:50:49,181 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:50:49,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688482837] [2022-09-16 11:50:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:50:49,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:50:49,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:50:49,183 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:50:49,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-09-16 11:50:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:50:49,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 11 conjunts are in the unsatisfiable core [2022-09-16 11:50:49,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:50:49,448 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 11:50:49,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:50:49,592 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 11:50:49,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:50:49,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624650367] [2022-09-16 11:50:49,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:50:49,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688482837] [2022-09-16 11:50:49,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688482837] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:50:49,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-09-16 11:50:49,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-09-16 11:50:49,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749036082] [2022-09-16 11:50:49,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-09-16 11:50:49,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-09-16 11:50:49,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:50:49,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-09-16 11:50:49,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2022-09-16 11:50:49,596 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 335 [2022-09-16 11:50:49,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 457 transitions, 2382 flow. Second operand has 22 states, 22 states have (on average 278.3181818181818) internal successors, (6123), 22 states have internal predecessors, (6123), 0 states have call successors, (0), 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 11:50:49,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:50:49,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 335 [2022-09-16 11:50:49,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:51:07,831 INFO L130 PetriNetUnfolder]: 1092/68376 cut-off events. [2022-09-16 11:51:07,831 INFO L131 PetriNetUnfolder]: For 31819/32887 co-relation queries the response was YES. [2022-09-16 11:51:09,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107612 conditions, 68376 events. 1092/68376 cut-off events. For 31819/32887 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 1058018 event pairs, 0 based on Foata normal form. 180/62616 useless extension candidates. Maximal degree in co-relation 103389. Up to 1504 conditions per place. [2022-09-16 11:51:09,308 INFO L137 encePairwiseOnDemand]: 317/335 looper letters, 257 selfloop transitions, 175 changer transitions 2/760 dead transitions. [2022-09-16 11:51:09,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 760 transitions, 4895 flow [2022-09-16 11:51:09,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-09-16 11:51:09,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-09-16 11:51:09,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 9138 transitions. [2022-09-16 11:51:09,314 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8524253731343283 [2022-09-16 11:51:09,314 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 9138 transitions. [2022-09-16 11:51:09,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 9138 transitions. [2022-09-16 11:51:09,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:51:09,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 9138 transitions. [2022-09-16 11:51:09,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 285.5625) internal successors, (9138), 32 states have internal predecessors, (9138), 0 states have call successors, (0), 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 11:51:09,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 335.0) internal successors, (11055), 33 states have internal predecessors, (11055), 0 states have call successors, (0), 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 11:51:09,325 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 335.0) internal successors, (11055), 33 states have internal predecessors, (11055), 0 states have call successors, (0), 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 11:51:09,325 INFO L175 Difference]: Start difference. First operand has 481 places, 457 transitions, 2382 flow. Second operand 32 states and 9138 transitions. [2022-09-16 11:51:09,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 760 transitions, 4895 flow [2022-09-16 11:51:09,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 760 transitions, 4857 flow, removed 13 selfloop flow, removed 5 redundant places. [2022-09-16 11:51:09,784 INFO L231 Difference]: Finished difference. Result has 514 places, 556 transitions, 3557 flow [2022-09-16 11:51:09,784 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=2344, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3557, PETRI_PLACES=514, PETRI_TRANSITIONS=556} [2022-09-16 11:51:09,784 INFO L287 CegarLoopForPetriNet]: 290 programPoint places, 224 predicate places. [2022-09-16 11:51:09,784 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 556 transitions, 3557 flow [2022-09-16 11:51:09,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 278.3181818181818) internal successors, (6123), 22 states have internal predecessors, (6123), 0 states have call successors, (0), 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 11:51:09,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:51:09,785 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:51:09,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-09-16 11:51:09,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:51:09,988 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-09-16 11:51:09,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:51:09,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1260043723, now seen corresponding path program 1 times [2022-09-16 11:51:09,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:51:09,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029817703] [2022-09-16 11:51:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:51:09,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:51:10,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-09-16 11:51:10,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932716971] [2022-09-16 11:51:10,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:51:10,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:51:10,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:51:10,003 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:51:10,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-09-16 11:51:10,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:51:10,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 3 conjunts are in the unsatisfiable core [2022-09-16 11:51:10,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:51:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-16 11:51:10,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:51:10,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:51:10,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029817703] [2022-09-16 11:51:10,195 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-09-16 11:51:10,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932716971] [2022-09-16 11:51:10,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932716971] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:51:10,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:51:10,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 11:51:10,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555933322] [2022-09-16 11:51:10,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:51:10,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 11:51:10,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:51:10,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 11:51:10,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 11:51:10,199 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 335 [2022-09-16 11:51:10,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 556 transitions, 3557 flow. Second operand has 4 states, 4 states have (on average 297.5) internal successors, (1190), 4 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 11:51:10,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:51:10,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 335 [2022-09-16 11:51:10,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand