./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 15:10:59,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 15:10:59,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 15:10:59,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 15:10:59,667 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 15:10:59,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 15:10:59,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 15:10:59,674 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 15:10:59,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 15:10:59,680 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 15:10:59,681 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 15:10:59,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 15:10:59,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 15:10:59,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 15:10:59,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 15:10:59,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 15:10:59,694 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 15:10:59,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 15:10:59,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 15:10:59,701 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 15:10:59,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 15:10:59,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 15:10:59,711 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 15:10:59,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 15:10:59,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 15:10:59,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 15:10:59,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 15:10:59,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 15:10:59,723 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 15:10:59,723 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 15:10:59,724 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 15:10:59,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 15:10:59,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 15:10:59,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 15:10:59,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 15:10:59,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 15:10:59,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 15:10:59,732 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 15:10:59,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 15:10:59,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 15:10:59,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 15:10:59,735 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 15:10:59,764 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 15:10:59,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 15:10:59,766 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 15:10:59,766 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 15:10:59,767 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 15:10:59,767 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 15:10:59,767 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 15:10:59,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 15:10:59,768 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 15:10:59,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 15:10:59,769 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 15:10:59,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 15:10:59,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 15:10:59,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 15:10:59,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 15:10:59,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 15:10:59,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 15:10:59,770 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 15:10:59,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 15:10:59,771 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 15:10:59,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 15:10:59,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 15:10:59,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 15:10:59,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 15:10:59,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 15:10:59,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 15:10:59,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 15:10:59,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 15:10:59,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 15:10:59,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 15:10:59,773 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 15:10:59,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 15:10:59,773 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 15:10:59,773 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 15:10:59,774 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 15:10:59,774 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 15:11:00,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 15:11:00,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 15:11:00,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 15:11:00,078 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 15:11:00,078 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 15:11:00,080 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2023-09-01 15:11:01,280 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 15:11:01,501 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 15:11:01,501 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2023-09-01 15:11:01,513 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3afc7c211/0fe6b9bcd942414a840bd52f88408d5d/FLAGe271715a1 [2023-09-01 15:11:01,526 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3afc7c211/0fe6b9bcd942414a840bd52f88408d5d [2023-09-01 15:11:01,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 15:11:01,529 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 15:11:01,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 15:11:01,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 15:11:01,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 15:11:01,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:11:01" (1/1) ... [2023-09-01 15:11:01,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@634f21e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:01, skipping insertion in model container [2023-09-01 15:11:01,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:11:01" (1/1) ... [2023-09-01 15:11:01,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 15:11:01,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 15:11:01,903 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30451,30464] [2023-09-01 15:11:01,910 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30681,30694] [2023-09-01 15:11:01,917 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30979,30992] [2023-09-01 15:11:01,927 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 15:11:01,938 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 15:11:02,001 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30451,30464] [2023-09-01 15:11:02,002 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30681,30694] [2023-09-01 15:11:02,004 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30979,30992] [2023-09-01 15:11:02,010 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 15:11:02,045 INFO L208 MainTranslator]: Completed translation [2023-09-01 15:11:02,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:02 WrapperNode [2023-09-01 15:11:02,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 15:11:02,047 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 15:11:02,047 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 15:11:02,047 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 15:11:02,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:02" (1/1) ... [2023-09-01 15:11:02,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:02" (1/1) ... [2023-09-01 15:11:02,110 INFO L138 Inliner]: procedures = 168, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 142 [2023-09-01 15:11:02,111 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 15:11:02,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 15:11:02,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 15:11:02,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 15:11:02,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:02" (1/1) ... [2023-09-01 15:11:02,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:02" (1/1) ... [2023-09-01 15:11:02,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:02" (1/1) ... [2023-09-01 15:11:02,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:02" (1/1) ... [2023-09-01 15:11:02,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:02" (1/1) ... [2023-09-01 15:11:02,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:02" (1/1) ... [2023-09-01 15:11:02,150 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:02" (1/1) ... [2023-09-01 15:11:02,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:02" (1/1) ... [2023-09-01 15:11:02,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 15:11:02,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 15:11:02,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 15:11:02,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 15:11:02,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:02" (1/1) ... [2023-09-01 15:11:02,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 15:11:02,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:11:02,188 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 15:11:02,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 15:11:02,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 15:11:02,222 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-09-01 15:11:02,222 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-09-01 15:11:02,222 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-09-01 15:11:02,222 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-09-01 15:11:02,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 15:11:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 15:11:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 15:11:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 15:11:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 15:11:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-09-01 15:11:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 15:11:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 15:11:02,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 15:11:02,225 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 15:11:02,333 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 15:11:02,335 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 15:11:02,610 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 15:11:02,617 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 15:11:02,619 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 15:11:02,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:11:02 BoogieIcfgContainer [2023-09-01 15:11:02,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 15:11:02,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 15:11:02,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 15:11:02,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 15:11:02,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:11:01" (1/3) ... [2023-09-01 15:11:02,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34e95f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:11:02, skipping insertion in model container [2023-09-01 15:11:02,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:02" (2/3) ... [2023-09-01 15:11:02,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34e95f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:11:02, skipping insertion in model container [2023-09-01 15:11:02,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:11:02" (3/3) ... [2023-09-01 15:11:02,630 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_ok.i [2023-09-01 15:11:02,637 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 15:11:02,643 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 15:11:02,643 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-09-01 15:11:02,643 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 15:11:02,738 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 15:11:02,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 148 transitions, 312 flow [2023-09-01 15:11:02,816 INFO L130 PetriNetUnfolder]: 11/146 cut-off events. [2023-09-01 15:11:02,816 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 15:11:02,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 146 events. 11/146 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 281 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-09-01 15:11:02,824 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 148 transitions, 312 flow [2023-09-01 15:11:02,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 137 transitions, 283 flow [2023-09-01 15:11:02,830 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 15:11:02,838 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 137 transitions, 283 flow [2023-09-01 15:11:02,840 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 137 transitions, 283 flow [2023-09-01 15:11:02,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 137 transitions, 283 flow [2023-09-01 15:11:02,868 INFO L130 PetriNetUnfolder]: 11/137 cut-off events. [2023-09-01 15:11:02,868 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 15:11:02,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 137 events. 11/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 266 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-09-01 15:11:02,872 INFO L119 LiptonReduction]: Number of co-enabled transitions 4498 [2023-09-01 15:11:07,306 INFO L134 LiptonReduction]: Checked pairs total: 9988 [2023-09-01 15:11:07,306 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-09-01 15:11:07,318 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 15:11:07,324 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@126457af, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 15:11:07,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-09-01 15:11:07,328 INFO L130 PetriNetUnfolder]: 2/16 cut-off events. [2023-09-01 15:11:07,329 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 15:11:07,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:11:07,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 15:11:07,330 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-09-01 15:11:07,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:11:07,334 INFO L85 PathProgramCache]: Analyzing trace with hash -249038413, now seen corresponding path program 1 times [2023-09-01 15:11:07,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:11:07,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12842893] [2023-09-01 15:11:07,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:11:07,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:11:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:11:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:11:07,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:11:07,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12842893] [2023-09-01 15:11:07,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12842893] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:11:07,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:11:07,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 15:11:07,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598735705] [2023-09-01 15:11:07,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:11:07,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 15:11:07,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:11:07,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 15:11:07,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 15:11:07,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 263 [2023-09-01 15:11:07,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:07,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:11:07,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 263 [2023-09-01 15:11:07,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:11:08,037 INFO L130 PetriNetUnfolder]: 691/1209 cut-off events. [2023-09-01 15:11:08,038 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-09-01 15:11:08,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2360 conditions, 1209 events. 691/1209 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5241 event pairs, 225 based on Foata normal form. 36/944 useless extension candidates. Maximal degree in co-relation 2149. Up to 671 conditions per place. [2023-09-01 15:11:08,047 INFO L137 encePairwiseOnDemand]: 257/263 looper letters, 51 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-09-01 15:11:08,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 59 transitions, 239 flow [2023-09-01 15:11:08,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 15:11:08,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 15:11:08,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2023-09-01 15:11:08,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678073510773131 [2023-09-01 15:11:08,061 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2023-09-01 15:11:08,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2023-09-01 15:11:08,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:11:08,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2023-09-01 15:11:08,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:08,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:08,073 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:08,075 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 85 flow. Second operand 3 states and 448 transitions. [2023-09-01 15:11:08,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 59 transitions, 239 flow [2023-09-01 15:11:08,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 59 transitions, 231 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 15:11:08,080 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 94 flow [2023-09-01 15:11:08,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2023-09-01 15:11:08,085 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-09-01 15:11:08,085 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 94 flow [2023-09-01 15:11:08,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:08,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:11:08,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:11:08,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 15:11:08,086 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-09-01 15:11:08,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:11:08,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1190865823, now seen corresponding path program 1 times [2023-09-01 15:11:08,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:11:08,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491859410] [2023-09-01 15:11:08,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:11:08,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:11:08,108 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 15:11:08,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328791561] [2023-09-01 15:11:08,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:11:08,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:11:08,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:11:08,112 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:11:08,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 15:11:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:11:08,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 15:11:08,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:11:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:11:08,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 15:11:08,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:11:08,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491859410] [2023-09-01 15:11:08,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 15:11:08,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328791561] [2023-09-01 15:11:08,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328791561] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:11:08,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:11:08,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 15:11:08,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632959023] [2023-09-01 15:11:08,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:11:08,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 15:11:08,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:11:08,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 15:11:08,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 15:11:08,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 263 [2023-09-01 15:11:08,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:08,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:11:08,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 263 [2023-09-01 15:11:08,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:11:08,621 INFO L130 PetriNetUnfolder]: 768/1353 cut-off events. [2023-09-01 15:11:08,621 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-09-01 15:11:08,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2746 conditions, 1353 events. 768/1353 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6290 event pairs, 289 based on Foata normal form. 0/1085 useless extension candidates. Maximal degree in co-relation 2118. Up to 631 conditions per place. [2023-09-01 15:11:08,630 INFO L137 encePairwiseOnDemand]: 256/263 looper letters, 72 selfloop transitions, 7 changer transitions 0/85 dead transitions. [2023-09-01 15:11:08,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 85 transitions, 358 flow [2023-09-01 15:11:08,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 15:11:08,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 15:11:08,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 704 transitions. [2023-09-01 15:11:08,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535361216730038 [2023-09-01 15:11:08,637 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 704 transitions. [2023-09-01 15:11:08,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 704 transitions. [2023-09-01 15:11:08,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:11:08,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 704 transitions. [2023-09-01 15:11:08,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.8) internal successors, (704), 5 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:08,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 263.0) internal successors, (1578), 6 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:08,644 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 263.0) internal successors, (1578), 6 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:08,644 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 94 flow. Second operand 5 states and 704 transitions. [2023-09-01 15:11:08,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 85 transitions, 358 flow [2023-09-01 15:11:08,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 85 transitions, 356 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 15:11:08,649 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 125 flow [2023-09-01 15:11:08,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=125, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-09-01 15:11:08,650 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2023-09-01 15:11:08,650 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 125 flow [2023-09-01 15:11:08,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:08,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:11:08,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:11:08,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 15:11:08,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:11:08,860 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-09-01 15:11:08,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:11:08,861 INFO L85 PathProgramCache]: Analyzing trace with hash -975244755, now seen corresponding path program 1 times [2023-09-01 15:11:08,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:11:08,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614419331] [2023-09-01 15:11:08,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:11:08,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:11:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:11:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:11:08,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:11:08,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614419331] [2023-09-01 15:11:08,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614419331] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:11:08,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:11:08,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 15:11:08,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439447052] [2023-09-01 15:11:08,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:11:09,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 15:11:09,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:11:09,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 15:11:09,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 15:11:09,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 263 [2023-09-01 15:11:09,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:09,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:11:09,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 263 [2023-09-01 15:11:09,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:11:09,188 INFO L130 PetriNetUnfolder]: 837/1451 cut-off events. [2023-09-01 15:11:09,188 INFO L131 PetriNetUnfolder]: For 491/491 co-relation queries the response was YES. [2023-09-01 15:11:09,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3409 conditions, 1451 events. 837/1451 cut-off events. For 491/491 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6266 event pairs, 345 based on Foata normal form. 42/1276 useless extension candidates. Maximal degree in co-relation 2955. Up to 839 conditions per place. [2023-09-01 15:11:09,197 INFO L137 encePairwiseOnDemand]: 259/263 looper letters, 53 selfloop transitions, 3 changer transitions 2/63 dead transitions. [2023-09-01 15:11:09,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 63 transitions, 321 flow [2023-09-01 15:11:09,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 15:11:09,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 15:11:09,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 447 transitions. [2023-09-01 15:11:09,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5665399239543726 [2023-09-01 15:11:09,199 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 447 transitions. [2023-09-01 15:11:09,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 447 transitions. [2023-09-01 15:11:09,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:11:09,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 447 transitions. [2023-09-01 15:11:09,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:09,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:09,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:09,202 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 125 flow. Second operand 3 states and 447 transitions. [2023-09-01 15:11:09,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 63 transitions, 321 flow [2023-09-01 15:11:09,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 63 transitions, 311 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 15:11:09,206 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 135 flow [2023-09-01 15:11:09,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2023-09-01 15:11:09,207 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2023-09-01 15:11:09,207 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 135 flow [2023-09-01 15:11:09,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:09,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:11:09,208 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:11:09,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 15:11:09,208 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-09-01 15:11:09,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:11:09,208 INFO L85 PathProgramCache]: Analyzing trace with hash 462982722, now seen corresponding path program 1 times [2023-09-01 15:11:09,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:11:09,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743940622] [2023-09-01 15:11:09,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:11:09,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:11:09,235 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 15:11:09,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993913831] [2023-09-01 15:11:09,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:11:09,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:11:09,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:11:09,241 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:11:09,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 15:11:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:11:09,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 15:11:09,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:11:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:11:09,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 15:11:09,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:11:09,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743940622] [2023-09-01 15:11:09,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 15:11:09,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993913831] [2023-09-01 15:11:09,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993913831] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:11:09,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:11:09,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 15:11:09,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941938444] [2023-09-01 15:11:09,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:11:09,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 15:11:09,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:11:09,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 15:11:09,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 15:11:09,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 263 [2023-09-01 15:11:09,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:09,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:11:09,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 263 [2023-09-01 15:11:09,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:11:09,588 INFO L130 PetriNetUnfolder]: 629/1157 cut-off events. [2023-09-01 15:11:09,588 INFO L131 PetriNetUnfolder]: For 421/421 co-relation queries the response was YES. [2023-09-01 15:11:09,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2605 conditions, 1157 events. 629/1157 cut-off events. For 421/421 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4983 event pairs, 467 based on Foata normal form. 64/1036 useless extension candidates. Maximal degree in co-relation 2203. Up to 988 conditions per place. [2023-09-01 15:11:09,595 INFO L137 encePairwiseOnDemand]: 260/263 looper letters, 29 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-09-01 15:11:09,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 37 transitions, 177 flow [2023-09-01 15:11:09,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 15:11:09,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 15:11:09,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 420 transitions. [2023-09-01 15:11:09,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532319391634981 [2023-09-01 15:11:09,598 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 420 transitions. [2023-09-01 15:11:09,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 420 transitions. [2023-09-01 15:11:09,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:11:09,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 420 transitions. [2023-09-01 15:11:09,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:09,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:09,602 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:09,602 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 135 flow. Second operand 3 states and 420 transitions. [2023-09-01 15:11:09,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 37 transitions, 177 flow [2023-09-01 15:11:09,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 15:11:09,605 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 110 flow [2023-09-01 15:11:09,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-09-01 15:11:09,605 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-09-01 15:11:09,606 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 110 flow [2023-09-01 15:11:09,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:09,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:11:09,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:11:09,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 15:11:09,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-09-01 15:11:09,813 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-09-01 15:11:09,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:11:09,813 INFO L85 PathProgramCache]: Analyzing trace with hash -2106315209, now seen corresponding path program 1 times [2023-09-01 15:11:09,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:11:09,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084372731] [2023-09-01 15:11:09,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:11:09,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:11:09,830 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 15:11:09,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797144187] [2023-09-01 15:11:09,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:11:09,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:11:09,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:11:09,832 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:11:09,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 15:11:09,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:11:09,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 15:11:09,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:11:09,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 15:11:09,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:11:09,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 15:11:09,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:11:09,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084372731] [2023-09-01 15:11:09,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 15:11:09,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797144187] [2023-09-01 15:11:09,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797144187] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:11:09,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:11:09,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 15:11:09,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320787311] [2023-09-01 15:11:09,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:11:09,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 15:11:09,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:11:09,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 15:11:09,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 15:11:10,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 263 [2023-09-01 15:11:10,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:10,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:11:10,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 263 [2023-09-01 15:11:10,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:11:10,129 INFO L130 PetriNetUnfolder]: 509/940 cut-off events. [2023-09-01 15:11:10,129 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2023-09-01 15:11:10,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2078 conditions, 940 events. 509/940 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4025 event pairs, 135 based on Foata normal form. 0/838 useless extension candidates. Maximal degree in co-relation 2067. Up to 552 conditions per place. [2023-09-01 15:11:10,134 INFO L137 encePairwiseOnDemand]: 259/263 looper letters, 38 selfloop transitions, 4 changer transitions 2/49 dead transitions. [2023-09-01 15:11:10,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 229 flow [2023-09-01 15:11:10,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 15:11:10,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 15:11:10,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-09-01 15:11:10,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487959442332065 [2023-09-01 15:11:10,136 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-09-01 15:11:10,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-09-01 15:11:10,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:11:10,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-09-01 15:11:10,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:10,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:10,139 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:10,140 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 110 flow. Second operand 3 states and 433 transitions. [2023-09-01 15:11:10,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 229 flow [2023-09-01 15:11:10,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 226 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 15:11:10,142 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 113 flow [2023-09-01 15:11:10,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2023-09-01 15:11:10,143 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-09-01 15:11:10,143 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 113 flow [2023-09-01 15:11:10,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:10,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:11:10,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:11:10,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 15:11:10,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:11:10,357 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-09-01 15:11:10,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:11:10,357 INFO L85 PathProgramCache]: Analyzing trace with hash 80410237, now seen corresponding path program 1 times [2023-09-01 15:11:10,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:11:10,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547225307] [2023-09-01 15:11:10,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:11:10,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:11:10,375 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 15:11:10,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859756532] [2023-09-01 15:11:10,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:11:10,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:11:10,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:11:10,377 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:11:10,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 15:11:10,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:11:10,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 15:11:10,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:11:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:11:10,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 15:11:10,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:11:10,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547225307] [2023-09-01 15:11:10,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 15:11:10,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859756532] [2023-09-01 15:11:10,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859756532] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:11:10,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:11:10,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 15:11:10,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862799415] [2023-09-01 15:11:10,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:11:10,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 15:11:10,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:11:10,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 15:11:10,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 15:11:10,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 263 [2023-09-01 15:11:10,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 113 flow. Second operand has 4 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:10,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:11:10,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 263 [2023-09-01 15:11:10,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:11:11,009 INFO L130 PetriNetUnfolder]: 602/1172 cut-off events. [2023-09-01 15:11:11,010 INFO L131 PetriNetUnfolder]: For 176/178 co-relation queries the response was YES. [2023-09-01 15:11:11,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2676 conditions, 1172 events. 602/1172 cut-off events. For 176/178 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 5226 event pairs, 138 based on Foata normal form. 0/1113 useless extension candidates. Maximal degree in co-relation 2665. Up to 529 conditions per place. [2023-09-01 15:11:11,015 INFO L137 encePairwiseOnDemand]: 259/263 looper letters, 56 selfloop transitions, 4 changer transitions 5/72 dead transitions. [2023-09-01 15:11:11,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 72 transitions, 347 flow [2023-09-01 15:11:11,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 15:11:11,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 15:11:11,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 564 transitions. [2023-09-01 15:11:11,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5361216730038023 [2023-09-01 15:11:11,018 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 564 transitions. [2023-09-01 15:11:11,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 564 transitions. [2023-09-01 15:11:11,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:11:11,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 564 transitions. [2023-09-01 15:11:11,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:11,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:11,023 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:11,023 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 113 flow. Second operand 4 states and 564 transitions. [2023-09-01 15:11:11,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 72 transitions, 347 flow [2023-09-01 15:11:11,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 72 transitions, 339 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 15:11:11,027 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 134 flow [2023-09-01 15:11:11,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2023-09-01 15:11:11,030 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2023-09-01 15:11:11,030 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 134 flow [2023-09-01 15:11:11,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:11,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:11:11,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:11:11,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 15:11:11,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:11:11,237 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-09-01 15:11:11,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:11:11,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1189813252, now seen corresponding path program 1 times [2023-09-01 15:11:11,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:11:11,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202070670] [2023-09-01 15:11:11,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:11:11,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:11:11,252 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 15:11:11,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24004734] [2023-09-01 15:11:11,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:11:11,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:11:11,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:11:11,254 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:11:11,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 15:11:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:11:11,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 15:11:11,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:11:11,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 15:11:11,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2023-09-01 15:11:11,501 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-09-01 15:11:11,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 15:11:11,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-09-01 15:11:11,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-09-01 15:11:11,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2023-09-01 15:11:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:11:11,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 15:11:11,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:11:11,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202070670] [2023-09-01 15:11:11,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 15:11:11,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24004734] [2023-09-01 15:11:11,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24004734] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:11:11,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:11:11,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 15:11:11,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604547201] [2023-09-01 15:11:11,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:11:11,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 15:11:11,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:11:11,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 15:11:11,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-09-01 15:11:12,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 263 [2023-09-01 15:11:12,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 134 flow. Second operand has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:12,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:11:12,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 263 [2023-09-01 15:11:12,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:11:12,508 INFO L130 PetriNetUnfolder]: 922/1795 cut-off events. [2023-09-01 15:11:12,508 INFO L131 PetriNetUnfolder]: For 372/378 co-relation queries the response was YES. [2023-09-01 15:11:12,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4097 conditions, 1795 events. 922/1795 cut-off events. For 372/378 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 9196 event pairs, 288 based on Foata normal form. 12/1731 useless extension candidates. Maximal degree in co-relation 4083. Up to 833 conditions per place. [2023-09-01 15:11:12,517 INFO L137 encePairwiseOnDemand]: 254/263 looper letters, 66 selfloop transitions, 11 changer transitions 8/92 dead transitions. [2023-09-01 15:11:12,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 92 transitions, 462 flow [2023-09-01 15:11:12,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 15:11:12,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 15:11:12,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 910 transitions. [2023-09-01 15:11:12,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49429657794676807 [2023-09-01 15:11:12,520 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 910 transitions. [2023-09-01 15:11:12,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 910 transitions. [2023-09-01 15:11:12,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:11:12,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 910 transitions. [2023-09-01 15:11:12,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 130.0) internal successors, (910), 7 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:12,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 263.0) internal successors, (2104), 8 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:12,525 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 263.0) internal successors, (2104), 8 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:12,525 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 134 flow. Second operand 7 states and 910 transitions. [2023-09-01 15:11:12,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 92 transitions, 462 flow [2023-09-01 15:11:12,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 92 transitions, 452 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 15:11:12,528 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 217 flow [2023-09-01 15:11:12,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=217, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2023-09-01 15:11:12,528 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2023-09-01 15:11:12,529 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 217 flow [2023-09-01 15:11:12,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:12,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:11:12,529 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:11:12,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 15:11:12,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:11:12,735 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-09-01 15:11:12,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:11:12,736 INFO L85 PathProgramCache]: Analyzing trace with hash 839130447, now seen corresponding path program 1 times [2023-09-01 15:11:12,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:11:12,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173985230] [2023-09-01 15:11:12,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:11:12,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:11:12,751 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 15:11:12,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451029798] [2023-09-01 15:11:12,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:11:12,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:11:12,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:11:12,753 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:11:12,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 15:11:12,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:11:12,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 2 conjunts are in the unsatisfiable core [2023-09-01 15:11:12,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:11:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:11:12,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 15:11:12,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:11:12,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173985230] [2023-09-01 15:11:12,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 15:11:12,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451029798] [2023-09-01 15:11:12,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451029798] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:11:12,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:11:12,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 15:11:12,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666988733] [2023-09-01 15:11:12,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:11:12,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 15:11:12,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:11:12,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 15:11:12,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 15:11:12,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 263 [2023-09-01 15:11:12,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:12,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:11:12,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 263 [2023-09-01 15:11:12,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:11:13,053 INFO L130 PetriNetUnfolder]: 739/1428 cut-off events. [2023-09-01 15:11:13,054 INFO L131 PetriNetUnfolder]: For 880/880 co-relation queries the response was YES. [2023-09-01 15:11:13,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3581 conditions, 1428 events. 739/1428 cut-off events. For 880/880 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 5820 event pairs, 232 based on Foata normal form. 38/1466 useless extension candidates. Maximal degree in co-relation 3563. Up to 837 conditions per place. [2023-09-01 15:11:13,061 INFO L137 encePairwiseOnDemand]: 259/263 looper letters, 47 selfloop transitions, 2 changer transitions 6/59 dead transitions. [2023-09-01 15:11:13,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 59 transitions, 361 flow [2023-09-01 15:11:13,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 15:11:13,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 15:11:13,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-09-01 15:11:13,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487959442332065 [2023-09-01 15:11:13,063 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-09-01 15:11:13,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-09-01 15:11:13,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:11:13,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-09-01 15:11:13,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:13,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:13,066 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:13,066 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 217 flow. Second operand 3 states and 433 transitions. [2023-09-01 15:11:13,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 59 transitions, 361 flow [2023-09-01 15:11:13,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 352 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 15:11:13,069 INFO L231 Difference]: Finished difference. Result has 55 places, 42 transitions, 196 flow [2023-09-01 15:11:13,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=55, PETRI_TRANSITIONS=42} [2023-09-01 15:11:13,070 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 17 predicate places. [2023-09-01 15:11:13,070 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 42 transitions, 196 flow [2023-09-01 15:11:13,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:13,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:11:13,070 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-09-01 15:11:13,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 15:11:13,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:11:13,276 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-09-01 15:11:13,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:11:13,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1317669106, now seen corresponding path program 1 times [2023-09-01 15:11:13,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:11:13,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486567875] [2023-09-01 15:11:13,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:11:13,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:11:13,297 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 15:11:13,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3748903] [2023-09-01 15:11:13,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:11:13,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:11:13,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:11:13,299 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:11:13,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 15:11:13,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:11:13,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 15:11:13,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:11:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:11:13,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:11:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:11:14,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:11:14,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486567875] [2023-09-01 15:11:14,621 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 15:11:14,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3748903] [2023-09-01 15:11:14,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3748903] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:11:14,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 15:11:14,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-09-01 15:11:14,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893642012] [2023-09-01 15:11:14,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 15:11:14,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 15:11:14,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:11:14,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 15:11:14,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-09-01 15:11:15,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 263 [2023-09-01 15:11:15,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 196 flow. Second operand has 12 states, 12 states have (on average 125.58333333333333) internal successors, (1507), 12 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:15,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:11:15,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 263 [2023-09-01 15:11:15,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:11:18,254 INFO L130 PetriNetUnfolder]: 650/1323 cut-off events. [2023-09-01 15:11:18,254 INFO L131 PetriNetUnfolder]: For 876/876 co-relation queries the response was YES. [2023-09-01 15:11:18,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3422 conditions, 1323 events. 650/1323 cut-off events. For 876/876 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4542 event pairs, 118 based on Foata normal form. 20/1343 useless extension candidates. Maximal degree in co-relation 3403. Up to 269 conditions per place. [2023-09-01 15:11:18,265 INFO L137 encePairwiseOnDemand]: 258/263 looper letters, 104 selfloop transitions, 11 changer transitions 7/128 dead transitions. [2023-09-01 15:11:18,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 128 transitions, 752 flow [2023-09-01 15:11:18,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 15:11:18,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 15:11:18,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1323 transitions. [2023-09-01 15:11:18,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503041825095057 [2023-09-01 15:11:18,269 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1323 transitions. [2023-09-01 15:11:18,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1323 transitions. [2023-09-01 15:11:18,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:11:18,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1323 transitions. [2023-09-01 15:11:18,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 132.3) internal successors, (1323), 10 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:18,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 263.0) internal successors, (2893), 11 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:18,277 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 263.0) internal successors, (2893), 11 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:18,277 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 196 flow. Second operand 10 states and 1323 transitions. [2023-09-01 15:11:18,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 128 transitions, 752 flow [2023-09-01 15:11:18,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 128 transitions, 732 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-09-01 15:11:18,282 INFO L231 Difference]: Finished difference. Result has 63 places, 48 transitions, 247 flow [2023-09-01 15:11:18,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=247, PETRI_PLACES=63, PETRI_TRANSITIONS=48} [2023-09-01 15:11:18,283 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 25 predicate places. [2023-09-01 15:11:18,283 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 48 transitions, 247 flow [2023-09-01 15:11:18,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 125.58333333333333) internal successors, (1507), 12 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:18,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:11:18,285 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-09-01 15:11:18,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 15:11:18,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:11:18,493 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-09-01 15:11:18,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:11:18,493 INFO L85 PathProgramCache]: Analyzing trace with hash 100212339, now seen corresponding path program 1 times [2023-09-01 15:11:18,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:11:18,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736486827] [2023-09-01 15:11:18,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:11:18,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:11:18,511 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 15:11:18,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988607800] [2023-09-01 15:11:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:11:18,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:11:18,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:11:18,513 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:11:18,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 15:11:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:11:18,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 67 conjunts are in the unsatisfiable core [2023-09-01 15:11:18,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:11:19,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 15:11:19,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2023-09-01 15:11:19,027 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-09-01 15:11:19,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 15:11:19,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-09-01 15:11:19,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-09-01 15:11:19,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-09-01 15:11:19,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-09-01 15:11:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:11:19,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:11:49,267 WARN L222 SmtUtils]: Spent 18.81s on a formula simplification. DAG size of input: 123 DAG size of output: 84 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:12:07,500 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~buffer_size~0 4294967296))) (let ((.cse1 (mod c_~next~0 4294967296)) (.cse10 (mod (+ c_~first~0 1) 4294967296)) (.cse8 (mod (mod (mod (+ c_~next~0 1) 4294967296) .cse0) 4294967296))) (or (<= .cse0 .cse1) (= (mod c_~send~0 256) 0) (let ((.cse6 (<= .cse10 2147483647)) (.cse7 (+ |c_~#buffer~0.offset| .cse10 (- 4294967296))) (.cse2 (+ .cse1 |c_~#buffer~0.offset|)) (.cse4 (+ |c_~#buffer~0.offset| .cse10)) (.cse5 (< 2147483647 .cse10))) (and (or (let ((.cse3 (+ |c_~#buffer~0.offset| .cse8))) (and (or (forall ((v_ArrVal_630 Int) (v_ArrVal_628 (Array Int Int))) (= (select (store (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_628) |c_~#buffer~0.base|) .cse2 v_ArrVal_630) .cse3 1) .cse4) 1)) .cse5) (or .cse6 (forall ((v_ArrVal_630 Int) (v_ArrVal_628 (Array Int Int))) (= (select (store (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_628) |c_~#buffer~0.base|) .cse2 v_ArrVal_630) .cse3 1) .cse7) 1))))) (< 2147483647 .cse8)) (or (<= .cse8 2147483647) (let ((.cse9 (+ |c_~#buffer~0.offset| .cse8 (- 4294967296)))) (and (or .cse6 (forall ((v_ArrVal_630 Int) (v_ArrVal_628 (Array Int Int))) (= (select (store (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_628) |c_~#buffer~0.base|) (+ .cse1 |c_~#buffer~0.offset| (- 4294967296)) v_ArrVal_630) .cse9 1) .cse7) 1))) (or (forall ((v_ArrVal_630 Int) (v_ArrVal_628 (Array Int Int))) (= 1 (select (store (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_628) |c_~#buffer~0.base|) .cse2 v_ArrVal_630) .cse9 1) .cse4))) .cse5)))))) (<= .cse0 .cse10) (<= .cse8 0)))) is different from false [2023-09-01 15:12:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:12:08,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:12:08,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736486827] [2023-09-01 15:12:08,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 15:12:08,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988607800] [2023-09-01 15:12:08,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988607800] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:12:08,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 15:12:08,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2023-09-01 15:12:08,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220934037] [2023-09-01 15:12:08,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 15:12:08,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 15:12:08,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:12:08,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 15:12:08,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=697, Unknown=1, NotChecked=54, Total=870 [2023-09-01 15:12:08,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 263 [2023-09-01 15:12:08,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 48 transitions, 247 flow. Second operand has 30 states, 30 states have (on average 75.13333333333334) internal successors, (2254), 30 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:12:08,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:12:08,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 263 [2023-09-01 15:12:08,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:12:31,903 WARN L222 SmtUtils]: Spent 19.68s on a formula simplification. DAG size of input: 204 DAG size of output: 107 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:12:54,088 WARN L222 SmtUtils]: Spent 12.44s on a formula simplification. DAG size of input: 162 DAG size of output: 141 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:13:20,484 WARN L222 SmtUtils]: Spent 25.03s on a formula simplification. DAG size of input: 231 DAG size of output: 134 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:13:45,543 WARN L222 SmtUtils]: Spent 23.99s on a formula simplification. DAG size of input: 219 DAG size of output: 122 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:14:13,154 WARN L222 SmtUtils]: Spent 26.21s on a formula simplification. DAG size of input: 250 DAG size of output: 157 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:15:03,906 WARN L222 SmtUtils]: Spent 47.56s on a formula simplification. DAG size of input: 280 DAG size of output: 239 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:15:10,540 WARN L222 SmtUtils]: Spent 5.28s on a formula simplification that was a NOOP. DAG size: 164 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:15:28,165 WARN L222 SmtUtils]: Spent 14.28s on a formula simplification. DAG size of input: 116 DAG size of output: 114 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:15:54,185 WARN L222 SmtUtils]: Spent 15.29s on a formula simplification. DAG size of input: 113 DAG size of output: 111 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:16:41,178 WARN L222 SmtUtils]: Spent 44.32s on a formula simplification. DAG size of input: 278 DAG size of output: 237 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:17:17,461 WARN L222 SmtUtils]: Spent 16.65s on a formula simplification. DAG size of input: 208 DAG size of output: 187 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:17:57,864 WARN L222 SmtUtils]: Spent 36.31s on a formula simplification. DAG size of input: 276 DAG size of output: 183 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:18:28,737 WARN L222 SmtUtils]: Spent 18.53s on a formula simplification. DAG size of input: 189 DAG size of output: 168 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:19:22,606 WARN L222 SmtUtils]: Spent 51.25s on a formula simplification. DAG size of input: 212 DAG size of output: 157 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:19:43,248 WARN L222 SmtUtils]: Spent 16.71s on a formula simplification. DAG size of input: 177 DAG size of output: 156 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:20:35,588 WARN L222 SmtUtils]: Spent 49.05s on a formula simplification. DAG size of input: 209 DAG size of output: 154 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:20:56,189 WARN L222 SmtUtils]: Spent 8.83s on a formula simplification that was a NOOP. DAG size: 190 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:21:31,843 WARN L222 SmtUtils]: Spent 33.92s on a formula simplification. DAG size of input: 181 DAG size of output: 123 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:22:05,442 WARN L222 SmtUtils]: Spent 23.78s on a formula simplification. DAG size of input: 140 DAG size of output: 138 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:22:32,523 WARN L222 SmtUtils]: Spent 21.20s on a formula simplification. DAG size of input: 128 DAG size of output: 126 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:23:33,095 WARN L222 SmtUtils]: Spent 58.96s on a formula simplification. DAG size of input: 210 DAG size of output: 155 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:24:02,581 WARN L222 SmtUtils]: Spent 28.00s on a formula simplification. DAG size of input: 182 DAG size of output: 124 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:24:37,860 WARN L222 SmtUtils]: Spent 30.87s on a formula simplification. DAG size of input: 234 DAG size of output: 213 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:25:01,024 WARN L222 SmtUtils]: Spent 20.99s on a formula simplification. DAG size of input: 134 DAG size of output: 132 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15