./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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/weaver/popl20-more-dec-subseq.wvr.c -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 ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 20:41:37,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 20:41:37,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 20:41:37,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 20:41:37,092 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 20:41:37,094 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 20:41:37,096 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 20:41:37,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 20:41:37,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 20:41:37,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 20:41:37,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 20:41:37,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 20:41:37,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 20:41:37,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 20:41:37,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 20:41:37,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 20:41:37,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 20:41:37,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 20:41:37,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 20:41:37,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 20:41:37,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 20:41:37,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 20:41:37,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 20:41:37,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 20:41:37,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 20:41:37,145 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 20:41:37,145 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 20:41:37,146 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 20:41:37,147 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 20:41:37,148 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 20:41:37,148 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 20:41:37,149 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 20:41:37,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 20:41:37,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 20:41:37,152 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 20:41:37,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 20:41:37,153 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 20:41:37,153 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 20:41:37,154 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 20:41:37,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 20:41:37,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 20:41:37,156 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 20:41:37,189 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 20:41:37,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 20:41:37,190 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 20:41:37,190 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 20:41:37,191 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 20:41:37,191 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 20:41:37,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 20:41:37,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 20:41:37,192 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 20:41:37,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 20:41:37,193 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 20:41:37,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 20:41:37,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 20:41:37,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 20:41:37,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 20:41:37,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 20:41:37,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 20:41:37,194 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 20:41:37,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 20:41:37,195 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 20:41:37,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 20:41:37,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 20:41:37,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 20:41:37,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 20:41:37,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:41:37,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 20:41:37,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 20:41:37,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 20:41:37,197 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 20:41:37,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 20:41:37,197 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 20:41:37,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 20:41:37,197 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 20:41:37,198 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 20:41:37,198 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 20:41:37,198 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 20:41:37,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 20:41:37,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 20:41:37,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 20:41:37,524 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 20:41:37,524 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 20:41:37,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c [2023-08-30 20:41:38,675 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 20:41:38,867 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 20:41:38,867 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c [2023-08-30 20:41:38,872 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f62713667/952ae98889464d1980a430265c0dc43d/FLAGea8a3433e [2023-08-30 20:41:38,886 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f62713667/952ae98889464d1980a430265c0dc43d [2023-08-30 20:41:38,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 20:41:38,890 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 20:41:38,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 20:41:38,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 20:41:38,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 20:41:38,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:41:38" (1/1) ... [2023-08-30 20:41:38,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30936dbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:41:38, skipping insertion in model container [2023-08-30 20:41:38,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:41:38" (1/1) ... [2023-08-30 20:41:38,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 20:41:38,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 20:41:39,043 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2023-08-30 20:41:39,050 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:41:39,058 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 20:41:39,077 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2023-08-30 20:41:39,079 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:41:39,086 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:41:39,086 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:41:39,092 INFO L208 MainTranslator]: Completed translation [2023-08-30 20:41:39,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:41:39 WrapperNode [2023-08-30 20:41:39,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 20:41:39,093 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 20:41:39,093 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 20:41:39,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 20:41:39,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:41:39" (1/1) ... [2023-08-30 20:41:39,107 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:41:39" (1/1) ... [2023-08-30 20:41:39,130 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 196 [2023-08-30 20:41:39,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 20:41:39,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 20:41:39,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 20:41:39,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 20:41:39,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:41:39" (1/1) ... [2023-08-30 20:41:39,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:41:39" (1/1) ... [2023-08-30 20:41:39,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:41:39" (1/1) ... [2023-08-30 20:41:39,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:41:39" (1/1) ... [2023-08-30 20:41:39,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:41:39" (1/1) ... [2023-08-30 20:41:39,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:41:39" (1/1) ... [2023-08-30 20:41:39,155 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:41:39" (1/1) ... [2023-08-30 20:41:39,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:41:39" (1/1) ... [2023-08-30 20:41:39,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 20:41:39,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 20:41:39,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 20:41:39,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 20:41:39,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:41:39" (1/1) ... [2023-08-30 20:41:39,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:41:39,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:41:39,191 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 20:41:39,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 20:41:39,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 20:41:39,234 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 20:41:39,234 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 20:41:39,234 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 20:41:39,234 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 20:41:39,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 20:41:39,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 20:41:39,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 20:41:39,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 20:41:39,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 20:41:39,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 20:41:39,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 20:41:39,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 20:41:39,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 20:41:39,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 20:41:39,237 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 20:41:39,322 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 20:41:39,323 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 20:41:39,614 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 20:41:39,733 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 20:41:39,733 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 20:41:39,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:41:39 BoogieIcfgContainer [2023-08-30 20:41:39,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 20:41:39,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 20:41:39,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 20:41:39,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 20:41:39,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 08:41:38" (1/3) ... [2023-08-30 20:41:39,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f1c996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:41:39, skipping insertion in model container [2023-08-30 20:41:39,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:41:39" (2/3) ... [2023-08-30 20:41:39,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f1c996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:41:39, skipping insertion in model container [2023-08-30 20:41:39,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:41:39" (3/3) ... [2023-08-30 20:41:39,741 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2023-08-30 20:41:39,750 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 20:41:39,758 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 20:41:39,758 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 20:41:39,758 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 20:41:39,860 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 20:41:39,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 178 transitions, 372 flow [2023-08-30 20:41:40,005 INFO L130 PetriNetUnfolder]: 15/176 cut-off events. [2023-08-30 20:41:40,007 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:41:40,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 176 events. 15/176 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 108 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 143. Up to 2 conditions per place. [2023-08-30 20:41:40,012 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 178 transitions, 372 flow [2023-08-30 20:41:40,019 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 168 transitions, 348 flow [2023-08-30 20:41:40,023 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 20:41:40,037 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 160 places, 168 transitions, 348 flow [2023-08-30 20:41:40,043 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 160 places, 168 transitions, 348 flow [2023-08-30 20:41:40,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 168 transitions, 348 flow [2023-08-30 20:41:40,094 INFO L130 PetriNetUnfolder]: 15/168 cut-off events. [2023-08-30 20:41:40,095 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:41:40,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 15/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 109 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 143. Up to 2 conditions per place. [2023-08-30 20:41:40,099 INFO L119 LiptonReduction]: Number of co-enabled transitions 690 [2023-08-30 20:41:45,292 INFO L134 LiptonReduction]: Checked pairs total: 1199 [2023-08-30 20:41:45,292 INFO L136 LiptonReduction]: Total number of compositions: 174 [2023-08-30 20:41:45,303 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 20:41:45,308 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;@37a704bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 20:41:45,308 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 20:41:45,313 INFO L130 PetriNetUnfolder]: 5/22 cut-off events. [2023-08-30 20:41:45,313 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:41:45,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:41:45,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:41:45,314 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:41:45,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:41:45,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1033780346, now seen corresponding path program 1 times [2023-08-30 20:41:45,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:41:45,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636197556] [2023-08-30 20:41:45,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:41:45,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:41:45,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:41:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:41:45,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:41:45,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636197556] [2023-08-30 20:41:45,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636197556] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:41:45,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:41:45,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 20:41:45,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619633078] [2023-08-30 20:41:45,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:41:45,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:41:45,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:41:45,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:41:45,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 20:41:45,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 352 [2023-08-30 20:41:45,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:45,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:41:45,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 352 [2023-08-30 20:41:45,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:41:46,017 INFO L130 PetriNetUnfolder]: 93/157 cut-off events. [2023-08-30 20:41:46,017 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 20:41:46,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 157 events. 93/157 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 450 event pairs, 51 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 267. Up to 154 conditions per place. [2023-08-30 20:41:46,021 INFO L137 encePairwiseOnDemand]: 349/352 looper letters, 21 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2023-08-30 20:41:46,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 24 transitions, 106 flow [2023-08-30 20:41:46,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:41:46,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:41:46,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2023-08-30 20:41:46,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-08-30 20:41:46,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2023-08-30 20:41:46,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2023-08-30 20:41:46,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:41:46,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2023-08-30 20:41:46,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:46,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:46,055 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:46,056 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 58 flow. Second operand 3 states and 480 transitions. [2023-08-30 20:41:46,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 24 transitions, 106 flow [2023-08-30 20:41:46,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 20:41:46,061 INFO L231 Difference]: Finished difference. Result has 24 places, 24 transitions, 62 flow [2023-08-30 20:41:46,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=24, PETRI_TRANSITIONS=24} [2023-08-30 20:41:46,068 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2023-08-30 20:41:46,068 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 24 transitions, 62 flow [2023-08-30 20:41:46,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:46,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:41:46,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:41:46,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 20:41:46,070 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:41:46,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:41:46,071 INFO L85 PathProgramCache]: Analyzing trace with hash -25586866, now seen corresponding path program 1 times [2023-08-30 20:41:46,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:41:46,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615825949] [2023-08-30 20:41:46,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:41:46,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:41:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:41:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:41:46,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:41:46,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615825949] [2023-08-30 20:41:46,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615825949] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:41:46,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735588124] [2023-08-30 20:41:46,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:41:46,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:41:46,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:41:46,237 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:41:46,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 20:41:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:41:46,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:41:46,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:41:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:41:46,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:41:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:41:46,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735588124] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:41:46,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:41:46,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2023-08-30 20:41:46,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348041684] [2023-08-30 20:41:46,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:41:46,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:41:46,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:41:46,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:41:46,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-08-30 20:41:46,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 352 [2023-08-30 20:41:46,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 24 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 145.8) internal successors, (729), 5 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:46,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:41:46,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 352 [2023-08-30 20:41:46,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:41:46,720 INFO L130 PetriNetUnfolder]: 170/274 cut-off events. [2023-08-30 20:41:46,721 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 20:41:46,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565 conditions, 274 events. 170/274 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 946 event pairs, 36 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 550. Up to 102 conditions per place. [2023-08-30 20:41:46,723 INFO L137 encePairwiseOnDemand]: 345/352 looper letters, 32 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2023-08-30 20:41:46,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 41 transitions, 178 flow [2023-08-30 20:41:46,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 20:41:46,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 20:41:46,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 899 transitions. [2023-08-30 20:41:46,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4256628787878788 [2023-08-30 20:41:46,727 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 899 transitions. [2023-08-30 20:41:46,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 899 transitions. [2023-08-30 20:41:46,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:41:46,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 899 transitions. [2023-08-30 20:41:46,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:46,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:46,736 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:46,736 INFO L175 Difference]: Start difference. First operand has 24 places, 24 transitions, 62 flow. Second operand 6 states and 899 transitions. [2023-08-30 20:41:46,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 41 transitions, 178 flow [2023-08-30 20:41:46,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 41 transitions, 174 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 20:41:46,737 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 93 flow [2023-08-30 20:41:46,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=93, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2023-08-30 20:41:46,738 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2023-08-30 20:41:46,738 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 93 flow [2023-08-30 20:41:46,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.8) internal successors, (729), 5 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:46,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:41:46,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:41:46,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 20:41:46,945 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 [2023-08-30 20:41:46,945 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:41:46,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:41:46,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1406989011, now seen corresponding path program 1 times [2023-08-30 20:41:46,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:41:46,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809947796] [2023-08-30 20:41:46,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:41:46,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:41:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:41:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:41:47,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:41:47,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809947796] [2023-08-30 20:41:47,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809947796] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:41:47,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:41:47,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 20:41:47,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195797731] [2023-08-30 20:41:47,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:41:47,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:41:47,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:41:47,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:41:47,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:41:47,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 352 [2023-08-30 20:41:47,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:47,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:41:47,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 352 [2023-08-30 20:41:47,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:41:47,250 INFO L130 PetriNetUnfolder]: 294/476 cut-off events. [2023-08-30 20:41:47,250 INFO L131 PetriNetUnfolder]: For 175/175 co-relation queries the response was YES. [2023-08-30 20:41:47,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150 conditions, 476 events. 294/476 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1767 event pairs, 55 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 1126. Up to 250 conditions per place. [2023-08-30 20:41:47,255 INFO L137 encePairwiseOnDemand]: 345/352 looper letters, 46 selfloop transitions, 16 changer transitions 0/62 dead transitions. [2023-08-30 20:41:47,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 62 transitions, 336 flow [2023-08-30 20:41:47,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:41:47,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:41:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 799 transitions. [2023-08-30 20:41:47,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45397727272727273 [2023-08-30 20:41:47,258 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 799 transitions. [2023-08-30 20:41:47,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 799 transitions. [2023-08-30 20:41:47,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:41:47,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 799 transitions. [2023-08-30 20:41:47,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.8) internal successors, (799), 5 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:47,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:47,265 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:47,265 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 93 flow. Second operand 5 states and 799 transitions. [2023-08-30 20:41:47,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 62 transitions, 336 flow [2023-08-30 20:41:47,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 62 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 20:41:47,270 INFO L231 Difference]: Finished difference. Result has 35 places, 41 transitions, 234 flow [2023-08-30 20:41:47,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=234, PETRI_PLACES=35, PETRI_TRANSITIONS=41} [2023-08-30 20:41:47,271 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2023-08-30 20:41:47,271 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 41 transitions, 234 flow [2023-08-30 20:41:47,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:47,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:41:47,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:41:47,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 20:41:47,273 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:41:47,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:41:47,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1352553143, now seen corresponding path program 2 times [2023-08-30 20:41:47,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:41:47,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453846334] [2023-08-30 20:41:47,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:41:47,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:41:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:41:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:41:47,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:41:47,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453846334] [2023-08-30 20:41:47,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453846334] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:41:47,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:41:47,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 20:41:47,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767827088] [2023-08-30 20:41:47,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:41:47,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:41:47,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:41:47,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:41:47,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 20:41:47,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 352 [2023-08-30 20:41:47,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 41 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:47,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:41:47,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 352 [2023-08-30 20:41:47,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:41:47,516 INFO L130 PetriNetUnfolder]: 477/766 cut-off events. [2023-08-30 20:41:47,517 INFO L131 PetriNetUnfolder]: For 1197/1219 co-relation queries the response was YES. [2023-08-30 20:41:47,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2701 conditions, 766 events. 477/766 cut-off events. For 1197/1219 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3156 event pairs, 137 based on Foata normal form. 16/766 useless extension candidates. Maximal degree in co-relation 2675. Up to 433 conditions per place. [2023-08-30 20:41:47,522 INFO L137 encePairwiseOnDemand]: 349/352 looper letters, 62 selfloop transitions, 4 changer transitions 2/70 dead transitions. [2023-08-30 20:41:47,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 70 transitions, 562 flow [2023-08-30 20:41:47,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:41:47,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:41:47,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 507 transitions. [2023-08-30 20:41:47,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2023-08-30 20:41:47,525 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 507 transitions. [2023-08-30 20:41:47,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 507 transitions. [2023-08-30 20:41:47,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:41:47,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 507 transitions. [2023-08-30 20:41:47,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:47,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:47,529 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:47,529 INFO L175 Difference]: Start difference. First operand has 35 places, 41 transitions, 234 flow. Second operand 3 states and 507 transitions. [2023-08-30 20:41:47,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 70 transitions, 562 flow [2023-08-30 20:41:47,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 70 transitions, 562 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 20:41:47,538 INFO L231 Difference]: Finished difference. Result has 38 places, 44 transitions, 271 flow [2023-08-30 20:41:47,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=271, PETRI_PLACES=38, PETRI_TRANSITIONS=44} [2023-08-30 20:41:47,539 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 13 predicate places. [2023-08-30 20:41:47,539 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 44 transitions, 271 flow [2023-08-30 20:41:47,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:47,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:41:47,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:41:47,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 20:41:47,541 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:41:47,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:41:47,542 INFO L85 PathProgramCache]: Analyzing trace with hash -84645957, now seen corresponding path program 1 times [2023-08-30 20:41:47,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:41:47,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464660403] [2023-08-30 20:41:47,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:41:47,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:41:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:41:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:41:47,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:41:47,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464660403] [2023-08-30 20:41:47,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464660403] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:41:47,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172777376] [2023-08-30 20:41:47,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:41:47,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:41:47,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:41:47,757 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:41:47,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 20:41:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:41:47,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:41:47,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:41:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:41:47,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 20:41:47,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172777376] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:41:47,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 20:41:47,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2023-08-30 20:41:47,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243613916] [2023-08-30 20:41:47,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:41:47,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:41:47,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:41:47,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:41:47,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:41:47,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 352 [2023-08-30 20:41:47,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 44 transitions, 271 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:47,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:41:47,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 352 [2023-08-30 20:41:47,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:41:48,000 INFO L130 PetriNetUnfolder]: 398/667 cut-off events. [2023-08-30 20:41:48,001 INFO L131 PetriNetUnfolder]: For 1124/1156 co-relation queries the response was YES. [2023-08-30 20:41:48,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2443 conditions, 667 events. 398/667 cut-off events. For 1124/1156 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2635 event pairs, 91 based on Foata normal form. 46/705 useless extension candidates. Maximal degree in co-relation 2414. Up to 555 conditions per place. [2023-08-30 20:41:48,006 INFO L137 encePairwiseOnDemand]: 349/352 looper letters, 47 selfloop transitions, 2 changer transitions 5/56 dead transitions. [2023-08-30 20:41:48,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 56 transitions, 430 flow [2023-08-30 20:41:48,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:41:48,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:41:48,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2023-08-30 20:41:48,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4753787878787879 [2023-08-30 20:41:48,008 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2023-08-30 20:41:48,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2023-08-30 20:41:48,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:41:48,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2023-08-30 20:41:48,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:48,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:48,013 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:48,016 INFO L175 Difference]: Start difference. First operand has 38 places, 44 transitions, 271 flow. Second operand 3 states and 502 transitions. [2023-08-30 20:41:48,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 56 transitions, 430 flow [2023-08-30 20:41:48,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 56 transitions, 426 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 20:41:48,021 INFO L231 Difference]: Finished difference. Result has 40 places, 44 transitions, 273 flow [2023-08-30 20:41:48,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=40, PETRI_TRANSITIONS=44} [2023-08-30 20:41:48,023 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 15 predicate places. [2023-08-30 20:41:48,023 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 44 transitions, 273 flow [2023-08-30 20:41:48,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:48,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:41:48,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:41:48,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 20:41:48,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:41:48,230 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:41:48,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:41:48,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1320014892, now seen corresponding path program 1 times [2023-08-30 20:41:48,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:41:48,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874308576] [2023-08-30 20:41:48,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:41:48,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:41:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:41:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:41:48,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:41:48,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874308576] [2023-08-30 20:41:48,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874308576] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:41:48,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:41:48,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 20:41:48,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31135720] [2023-08-30 20:41:48,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:41:48,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:41:48,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:41:48,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:41:48,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:41:48,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 352 [2023-08-30 20:41:48,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 44 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:48,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:41:48,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 352 [2023-08-30 20:41:48,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:41:48,588 INFO L130 PetriNetUnfolder]: 448/776 cut-off events. [2023-08-30 20:41:48,588 INFO L131 PetriNetUnfolder]: For 1574/1606 co-relation queries the response was YES. [2023-08-30 20:41:48,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2933 conditions, 776 events. 448/776 cut-off events. For 1574/1606 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3252 event pairs, 242 based on Foata normal form. 42/807 useless extension candidates. Maximal degree in co-relation 2509. Up to 660 conditions per place. [2023-08-30 20:41:48,593 INFO L137 encePairwiseOnDemand]: 347/352 looper letters, 41 selfloop transitions, 2 changer transitions 20/65 dead transitions. [2023-08-30 20:41:48,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 65 transitions, 505 flow [2023-08-30 20:41:48,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:41:48,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:41:48,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 789 transitions. [2023-08-30 20:41:48,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44829545454545455 [2023-08-30 20:41:48,597 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 789 transitions. [2023-08-30 20:41:48,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 789 transitions. [2023-08-30 20:41:48,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:41:48,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 789 transitions. [2023-08-30 20:41:48,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:48,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:48,603 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:48,603 INFO L175 Difference]: Start difference. First operand has 40 places, 44 transitions, 273 flow. Second operand 5 states and 789 transitions. [2023-08-30 20:41:48,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 65 transitions, 505 flow [2023-08-30 20:41:48,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 65 transitions, 503 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 20:41:48,609 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 287 flow [2023-08-30 20:41:48,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=287, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2023-08-30 20:41:48,611 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 21 predicate places. [2023-08-30 20:41:48,611 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 287 flow [2023-08-30 20:41:48,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:48,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:41:48,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:41:48,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 20:41:48,612 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:41:48,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:41:48,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1802696178, now seen corresponding path program 1 times [2023-08-30 20:41:48,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:41:48,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351275019] [2023-08-30 20:41:48,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:41:48,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:41:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:41:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:41:49,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:41:49,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351275019] [2023-08-30 20:41:49,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351275019] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:41:49,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966717842] [2023-08-30 20:41:49,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:41:49,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:41:49,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:41:49,812 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:41:49,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 20:41:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:41:49,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-30 20:41:49,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:41:50,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:41:50,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 20:41:50,502 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-08-30 20:41:50,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 10 [2023-08-30 20:41:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:41:50,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:41:50,928 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~end~0) (let ((.cse1 (+ (* c_~end~0 4) c_~queue~0.offset)) (.cse3 (+ c_~A~0.offset (* c_~i~0 4)))) (and (forall ((v_ArrVal_173 (Array Int Int)) (~queue~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_173))) (let ((.cse0 (select .cse2 ~queue~0.base))) (or (< (select .cse0 (+ (* c_~start~0 4) c_~queue~0.offset)) (+ c_~v_old~0 1)) (not (= (select .cse0 .cse1) (select (select .cse2 c_~A~0.base) .cse3))))))) (or (forall ((v_ArrVal_173 (Array Int Int)) (~queue~0.base Int)) (not (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_173))) (= (select (select .cse4 ~queue~0.base) .cse1) (select (select .cse4 c_~A~0.base) .cse3))))) (not (= (mod c_~ok~0 256) 0))))) (<= (+ c_~end~0 1) c_~start~0) (< c_~start~0 0) (< c_~last~0 |c_thread1Thread1of1ForFork1_#t~mem1#1|)) is different from false [2023-08-30 20:41:51,030 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2023-08-30 20:41:51,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 258 treesize of output 251 [2023-08-30 20:41:51,064 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:41:51,064 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 174 treesize of output 185 [2023-08-30 20:41:51,085 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:41:51,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 137 [2023-08-30 20:41:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:41:52,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966717842] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:41:52,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:41:52,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2023-08-30 20:41:52,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667059809] [2023-08-30 20:41:52,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:41:52,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 20:41:52,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:41:52,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 20:41:52,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=696, Unknown=1, NotChecked=56, Total=930 [2023-08-30 20:41:52,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 352 [2023-08-30 20:41:52,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 287 flow. Second operand has 31 states, 31 states have (on average 86.12903225806451) internal successors, (2670), 31 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:52,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:41:52,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 352 [2023-08-30 20:41:52,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:41:58,131 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~start~0 4) c_~queue~0.offset)) (.cse6 (+ (* c_~end~0 4) c_~queue~0.offset)) (.cse8 (+ c_~A~0.offset (* c_~i~0 4))) (.cse10 (< c_~last~0 |c_thread1Thread1of1ForFork1_#t~mem1#1|)) (.cse4 (<= c_~n~0 c_~end~0)) (.cse9 (<= (+ c_~end~0 1) c_~start~0)) (.cse1 (+ c_~v_old~0 1)) (.cse2 (not (= (mod c_~ok~0 256) 0))) (.cse11 (= c_~start~0 c_~end~0)) (.cse3 (< c_~start~0 0))) (and (or (and (< (select (select |c_#memory_int| c_~queue~0.base) .cse0) .cse1) .cse2) .cse3 (<= c_~end~0 c_~start~0) (<= c_~n~0 c_~start~0)) (or .cse4 (let ((.cse7 (select (select |c_#memory_int| c_~A~0.base) .cse8))) (and (forall ((~queue~0.base Int)) (let ((.cse5 (select |c_#memory_int| ~queue~0.base))) (or (not (= (select .cse5 .cse6) .cse7)) (< (select .cse5 .cse0) .cse1)))) (or (forall ((~queue~0.base Int)) (not (= (select (select |c_#memory_int| ~queue~0.base) .cse6) .cse7))) .cse2))) .cse9 .cse3 .cse10) (or .cse4 .cse9 .cse3 (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (and (< |c_#StackHeapBarrier| (+ |c_ULTIMATE.start_main_~#t2~0#1.base| 1)) .cse2 .cse11)) (= c_~ok~0 1) (or .cse4 .cse9 (and .cse2 (< |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |c_ULTIMATE.start_main_~#t2~0#1.base|) .cse11) .cse3) (or .cse4 (and (forall ((v_ArrVal_173 (Array Int Int)) (~queue~0.base Int)) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_173))) (let ((.cse12 (select .cse13 ~queue~0.base))) (or (< (select .cse12 .cse0) .cse1) (not (= (select .cse12 .cse6) (select (select .cse13 c_~A~0.base) .cse8))))))) (or (forall ((v_ArrVal_173 (Array Int Int)) (~queue~0.base Int)) (not (let ((.cse14 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_173))) (= (select (select .cse14 ~queue~0.base) .cse6) (select (select .cse14 c_~A~0.base) .cse8))))) .cse2)) .cse9 .cse3 .cse10) (or .cse4 .cse9 (and (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| c_~A~0.base)) (< c_~last~0 .cse1) .cse2 .cse11) .cse3))) is different from false [2023-08-30 20:42:00,673 INFO L130 PetriNetUnfolder]: 2576/4316 cut-off events. [2023-08-30 20:42:00,674 INFO L131 PetriNetUnfolder]: For 7316/7316 co-relation queries the response was YES. [2023-08-30 20:42:00,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16370 conditions, 4316 events. 2576/4316 cut-off events. For 7316/7316 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 25460 event pairs, 153 based on Foata normal form. 60/4372 useless extension candidates. Maximal degree in co-relation 16345. Up to 1386 conditions per place. [2023-08-30 20:42:00,702 INFO L137 encePairwiseOnDemand]: 334/352 looper letters, 333 selfloop transitions, 277 changer transitions 126/736 dead transitions. [2023-08-30 20:42:00,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 736 transitions, 5810 flow [2023-08-30 20:42:00,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-08-30 20:42:00,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-08-30 20:42:00,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 6230 transitions. [2023-08-30 20:42:00,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2602774064171123 [2023-08-30 20:42:00,724 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 6230 transitions. [2023-08-30 20:42:00,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 6230 transitions. [2023-08-30 20:42:00,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:42:00,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 6230 transitions. [2023-08-30 20:42:00,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 91.61764705882354) internal successors, (6230), 68 states have internal predecessors, (6230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:00,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 352.0) internal successors, (24288), 69 states have internal predecessors, (24288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:00,780 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 352.0) internal successors, (24288), 69 states have internal predecessors, (24288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:00,780 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 287 flow. Second operand 68 states and 6230 transitions. [2023-08-30 20:42:00,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 736 transitions, 5810 flow [2023-08-30 20:42:00,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 736 transitions, 5776 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-08-30 20:42:00,813 INFO L231 Difference]: Finished difference. Result has 148 places, 343 transitions, 3632 flow [2023-08-30 20:42:00,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=3632, PETRI_PLACES=148, PETRI_TRANSITIONS=343} [2023-08-30 20:42:00,814 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 123 predicate places. [2023-08-30 20:42:00,814 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 343 transitions, 3632 flow [2023-08-30 20:42:00,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 86.12903225806451) internal successors, (2670), 31 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:00,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:42:00,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:42:00,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 20:42:01,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:42:01,021 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:42:01,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:42:01,022 INFO L85 PathProgramCache]: Analyzing trace with hash 2003046256, now seen corresponding path program 2 times [2023-08-30 20:42:01,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:42:01,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135981254] [2023-08-30 20:42:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:42:01,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:42:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:42:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:42:02,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:42:02,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135981254] [2023-08-30 20:42:02,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135981254] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:42:02,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663967910] [2023-08-30 20:42:02,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:42:02,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:42:02,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:42:02,297 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:42:02,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 20:42:02,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:42:02,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:42:02,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 20:42:02,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:42:02,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:42:02,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:42:02,438 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 20:42:02,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 20:42:02,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 20:42:02,548 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:42:02,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 20:42:02,584 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 6 treesize of output 5 [2023-08-30 20:42:02,622 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 6 treesize of output 5 [2023-08-30 20:42:02,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:42:02,797 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-30 20:42:02,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 44 [2023-08-30 20:42:02,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-08-30 20:42:02,933 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 23 treesize of output 7 [2023-08-30 20:42:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:42:02,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:42:03,693 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:42:03,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 81 [2023-08-30 20:42:03,722 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:42:03,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2188 treesize of output 1978 [2023-08-30 20:42:03,849 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:42:03,849 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 1140 treesize of output 940 [2023-08-30 20:42:03,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 638 treesize of output 542 [2023-08-30 20:42:03,947 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:42:03,948 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 804 treesize of output 724 [2023-08-30 20:42:10,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:42:10,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663967910] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:42:10,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:42:10,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2023-08-30 20:42:10,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391248026] [2023-08-30 20:42:10,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:42:10,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 20:42:10,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:42:10,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 20:42:10,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=916, Unknown=8, NotChecked=0, Total=1122 [2023-08-30 20:42:12,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 352 [2023-08-30 20:42:12,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 343 transitions, 3632 flow. Second operand has 34 states, 34 states have (on average 82.94117647058823) internal successors, (2820), 34 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:12,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:42:12,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 352 [2023-08-30 20:42:12,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:42:21,947 WARN L839 $PredicateComparison]: unable to prove that (and (not (= (mod c_~ok~0 256) 0)) (forall ((v_ArrVal_219 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_219) c_~queue~0.base) (+ (* c_~start~0 4) c_~queue~0.offset)) (+ c_~v_old~0 1))) (<= c_~new~0 c_~v_old~0) (= c_~ok~0 1)) is different from false [2023-08-30 20:42:23,582 INFO L130 PetriNetUnfolder]: 4807/7937 cut-off events. [2023-08-30 20:42:23,582 INFO L131 PetriNetUnfolder]: For 148418/148418 co-relation queries the response was YES. [2023-08-30 20:42:23,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60879 conditions, 7937 events. 4807/7937 cut-off events. For 148418/148418 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 50617 event pairs, 303 based on Foata normal form. 5/7942 useless extension candidates. Maximal degree in co-relation 60808. Up to 2798 conditions per place. [2023-08-30 20:42:23,683 INFO L137 encePairwiseOnDemand]: 335/352 looper letters, 751 selfloop transitions, 412 changer transitions 53/1216 dead transitions. [2023-08-30 20:42:23,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 1216 transitions, 17159 flow [2023-08-30 20:42:23,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-08-30 20:42:23,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-08-30 20:42:23,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 5020 transitions. [2023-08-30 20:42:23,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2501993620414673 [2023-08-30 20:42:23,694 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 5020 transitions. [2023-08-30 20:42:23,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 5020 transitions. [2023-08-30 20:42:23,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:42:23,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 5020 transitions. [2023-08-30 20:42:23,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 88.0701754385965) internal successors, (5020), 57 states have internal predecessors, (5020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:23,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 352.0) internal successors, (20416), 58 states have internal predecessors, (20416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:23,737 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 352.0) internal successors, (20416), 58 states have internal predecessors, (20416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:23,737 INFO L175 Difference]: Start difference. First operand has 148 places, 343 transitions, 3632 flow. Second operand 57 states and 5020 transitions. [2023-08-30 20:42:23,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 1216 transitions, 17159 flow [2023-08-30 20:42:24,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 1216 transitions, 15893 flow, removed 591 selfloop flow, removed 12 redundant places. [2023-08-30 20:42:24,320 INFO L231 Difference]: Finished difference. Result has 214 places, 689 transitions, 8375 flow [2023-08-30 20:42:24,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=3321, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=8375, PETRI_PLACES=214, PETRI_TRANSITIONS=689} [2023-08-30 20:42:24,323 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 189 predicate places. [2023-08-30 20:42:24,323 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 689 transitions, 8375 flow [2023-08-30 20:42:24,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 82.94117647058823) internal successors, (2820), 34 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:24,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:42:24,325 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, 1] [2023-08-30 20:42:24,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 20:42:24,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:42:24,533 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:42:24,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:42:24,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1412565654, now seen corresponding path program 3 times [2023-08-30 20:42:24,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:42:24,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224765556] [2023-08-30 20:42:24,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:42:24,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:42:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:42:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:42:24,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:42:24,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224765556] [2023-08-30 20:42:24,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224765556] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:42:24,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033781668] [2023-08-30 20:42:24,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:42:24,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:42:24,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:42:24,657 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:42:24,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 20:42:24,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:42:24,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:42:24,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:42:24,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:42:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:42:24,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:42:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:42:24,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033781668] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:42:24,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:42:24,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-08-30 20:42:24,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868928471] [2023-08-30 20:42:24,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:42:24,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 20:42:24,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:42:24,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 20:42:24,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:42:25,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 352 [2023-08-30 20:42:25,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 689 transitions, 8375 flow. Second operand has 15 states, 15 states have (on average 146.26666666666668) internal successors, (2194), 15 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:25,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:42:25,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 352 [2023-08-30 20:42:25,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:42:28,299 INFO L130 PetriNetUnfolder]: 8196/13468 cut-off events. [2023-08-30 20:42:28,299 INFO L131 PetriNetUnfolder]: For 247820/248198 co-relation queries the response was YES. [2023-08-30 20:42:28,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111527 conditions, 13468 events. 8196/13468 cut-off events. For 247820/248198 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 95352 event pairs, 886 based on Foata normal form. 283/13670 useless extension candidates. Maximal degree in co-relation 111433. Up to 4670 conditions per place. [2023-08-30 20:42:28,478 INFO L137 encePairwiseOnDemand]: 345/352 looper letters, 1356 selfloop transitions, 291 changer transitions 0/1673 dead transitions. [2023-08-30 20:42:28,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 1673 transitions, 23751 flow [2023-08-30 20:42:28,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 20:42:28,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 20:42:28,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1518 transitions. [2023-08-30 20:42:28,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2023-08-30 20:42:28,482 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1518 transitions. [2023-08-30 20:42:28,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1518 transitions. [2023-08-30 20:42:28,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:42:28,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1518 transitions. [2023-08-30 20:42:28,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 151.8) internal successors, (1518), 10 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:28,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 352.0) internal successors, (3872), 11 states have internal predecessors, (3872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:28,488 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 352.0) internal successors, (3872), 11 states have internal predecessors, (3872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:28,488 INFO L175 Difference]: Start difference. First operand has 214 places, 689 transitions, 8375 flow. Second operand 10 states and 1518 transitions. [2023-08-30 20:42:28,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 1673 transitions, 23751 flow [2023-08-30 20:42:29,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 1673 transitions, 23166 flow, removed 280 selfloop flow, removed 11 redundant places. [2023-08-30 20:42:29,438 INFO L231 Difference]: Finished difference. Result has 211 places, 857 transitions, 11735 flow [2023-08-30 20:42:29,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=8110, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11735, PETRI_PLACES=211, PETRI_TRANSITIONS=857} [2023-08-30 20:42:29,440 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 186 predicate places. [2023-08-30 20:42:29,440 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 857 transitions, 11735 flow [2023-08-30 20:42:29,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 146.26666666666668) internal successors, (2194), 15 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:29,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:42:29,441 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, 1] [2023-08-30 20:42:29,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 20:42:29,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:42:29,646 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:42:29,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:42:29,647 INFO L85 PathProgramCache]: Analyzing trace with hash -2087576016, now seen corresponding path program 4 times [2023-08-30 20:42:29,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:42:29,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187964365] [2023-08-30 20:42:29,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:42:29,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:42:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:42:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:42:29,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:42:29,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187964365] [2023-08-30 20:42:29,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187964365] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:42:29,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112034047] [2023-08-30 20:42:29,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:42:29,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:42:29,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:42:29,823 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:42:29,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 20:42:29,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:42:29,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:42:29,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:42:29,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:42:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:42:29,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:42:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:42:30,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112034047] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:42:30,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:42:30,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2023-08-30 20:42:30,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538843764] [2023-08-30 20:42:30,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:42:30,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 20:42:30,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:42:30,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 20:42:30,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2023-08-30 20:42:30,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 352 [2023-08-30 20:42:30,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 857 transitions, 11735 flow. Second operand has 10 states, 10 states have (on average 153.0) internal successors, (1530), 10 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:30,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:42:30,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 352 [2023-08-30 20:42:30,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:42:33,228 INFO L130 PetriNetUnfolder]: 8132/13843 cut-off events. [2023-08-30 20:42:33,228 INFO L131 PetriNetUnfolder]: For 305625/305625 co-relation queries the response was YES. [2023-08-30 20:42:33,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120985 conditions, 13843 events. 8132/13843 cut-off events. For 305625/305625 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 100297 event pairs, 1010 based on Foata normal form. 594/14437 useless extension candidates. Maximal degree in co-relation 118446. Up to 4517 conditions per place. [2023-08-30 20:42:33,375 INFO L137 encePairwiseOnDemand]: 346/352 looper letters, 730 selfloop transitions, 172 changer transitions 83/985 dead transitions. [2023-08-30 20:42:33,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 985 transitions, 15496 flow [2023-08-30 20:42:33,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:42:33,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:42:33,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1114 transitions. [2023-08-30 20:42:33,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45211038961038963 [2023-08-30 20:42:33,377 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1114 transitions. [2023-08-30 20:42:33,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1114 transitions. [2023-08-30 20:42:33,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:42:33,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1114 transitions. [2023-08-30 20:42:33,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 159.14285714285714) internal successors, (1114), 7 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:33,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 352.0) internal successors, (2816), 8 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:33,382 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 352.0) internal successors, (2816), 8 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:33,382 INFO L175 Difference]: Start difference. First operand has 211 places, 857 transitions, 11735 flow. Second operand 7 states and 1114 transitions. [2023-08-30 20:42:33,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 985 transitions, 15496 flow [2023-08-30 20:42:34,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 985 transitions, 15093 flow, removed 136 selfloop flow, removed 9 redundant places. [2023-08-30 20:42:34,835 INFO L231 Difference]: Finished difference. Result has 205 places, 719 transitions, 10406 flow [2023-08-30 20:42:34,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=9028, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10406, PETRI_PLACES=205, PETRI_TRANSITIONS=719} [2023-08-30 20:42:34,836 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 180 predicate places. [2023-08-30 20:42:34,836 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 719 transitions, 10406 flow [2023-08-30 20:42:34,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 153.0) internal successors, (1530), 10 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:34,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:42:34,837 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:42:34,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 20:42:35,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:42:35,041 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:42:35,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:42:35,042 INFO L85 PathProgramCache]: Analyzing trace with hash 377650720, now seen corresponding path program 5 times [2023-08-30 20:42:35,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:42:35,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008648816] [2023-08-30 20:42:35,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:42:35,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:42:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:42:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:42:36,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:42:36,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008648816] [2023-08-30 20:42:36,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008648816] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:42:36,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7880166] [2023-08-30 20:42:36,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:42:36,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:42:36,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:42:36,361 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:42:36,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 20:42:36,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:42:36,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:42:36,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 20:42:36,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:42:36,947 INFO L321 Elim1Store]: treesize reduction 19, result has 60.4 percent of original size [2023-08-30 20:42:36,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 40 treesize of output 38 [2023-08-30 20:42:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:42:37,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:42:37,512 INFO L321 Elim1Store]: treesize reduction 34, result has 60.0 percent of original size [2023-08-30 20:42:37,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 76 [2023-08-30 20:42:37,877 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:42:37,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7880166] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:42:37,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:42:37,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 37 [2023-08-30 20:42:37,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977653962] [2023-08-30 20:42:37,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:42:37,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 20:42:37,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:42:37,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 20:42:37,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2023-08-30 20:42:39,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 352 [2023-08-30 20:42:39,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 719 transitions, 10406 flow. Second operand has 39 states, 39 states have (on average 111.92307692307692) internal successors, (4365), 39 states have internal predecessors, (4365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:39,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:42:39,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 352 [2023-08-30 20:42:39,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:42:46,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 20:42:53,274 INFO L130 PetriNetUnfolder]: 14209/25067 cut-off events. [2023-08-30 20:42:53,274 INFO L131 PetriNetUnfolder]: For 498437/498437 co-relation queries the response was YES. [2023-08-30 20:42:53,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221018 conditions, 25067 events. 14209/25067 cut-off events. For 498437/498437 co-relation queries the response was YES. Maximal size of possible extension queue 1105. Compared 207146 event pairs, 157 based on Foata normal form. 42/25109 useless extension candidates. Maximal degree in co-relation 218651. Up to 8140 conditions per place. [2023-08-30 20:42:53,569 INFO L137 encePairwiseOnDemand]: 334/352 looper letters, 1088 selfloop transitions, 1037 changer transitions 266/2391 dead transitions. [2023-08-30 20:42:53,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 2391 transitions, 42407 flow [2023-08-30 20:42:53,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-08-30 20:42:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-08-30 20:42:53,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 10091 transitions. [2023-08-30 20:42:53,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3295128004179728 [2023-08-30 20:42:53,585 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 10091 transitions. [2023-08-30 20:42:53,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 10091 transitions. [2023-08-30 20:42:53,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:42:53,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 10091 transitions. [2023-08-30 20:42:53,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 115.98850574712644) internal successors, (10091), 87 states have internal predecessors, (10091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:53,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 352.0) internal successors, (30976), 88 states have internal predecessors, (30976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:53,631 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 352.0) internal successors, (30976), 88 states have internal predecessors, (30976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:53,631 INFO L175 Difference]: Start difference. First operand has 205 places, 719 transitions, 10406 flow. Second operand 87 states and 10091 transitions. [2023-08-30 20:42:53,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 2391 transitions, 42407 flow [2023-08-30 20:42:57,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 2391 transitions, 41838 flow, removed 259 selfloop flow, removed 2 redundant places. [2023-08-30 20:42:57,402 INFO L231 Difference]: Finished difference. Result has 325 places, 1438 transitions, 24735 flow [2023-08-30 20:42:57,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=10297, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=24735, PETRI_PLACES=325, PETRI_TRANSITIONS=1438} [2023-08-30 20:42:57,403 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 300 predicate places. [2023-08-30 20:42:57,403 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 1438 transitions, 24735 flow [2023-08-30 20:42:57,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 111.92307692307692) internal successors, (4365), 39 states have internal predecessors, (4365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:57,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:42:57,405 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:42:57,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 20:42:57,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:42:57,610 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:42:57,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:42:57,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1445197890, now seen corresponding path program 6 times [2023-08-30 20:42:57,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:42:57,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034335466] [2023-08-30 20:42:57,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:42:57,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:42:57,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:42:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:42:59,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:42:59,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034335466] [2023-08-30 20:42:59,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034335466] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:42:59,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821140482] [2023-08-30 20:42:59,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:42:59,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:42:59,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:42:59,055 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:42:59,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 20:42:59,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:42:59,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:42:59,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 20:42:59,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:42:59,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:42:59,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 20:42:59,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:42:59,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 20:42:59,664 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-08-30 20:42:59,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2023-08-30 20:42:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:42:59,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:43:04,191 WARN L839 $PredicateComparison]: unable to prove that (or (let ((.cse1 (+ c_~A~0.offset (* c_~i~0 4))) (.cse2 (* c_~end~0 4))) (and (or (not (= (mod c_~ok~0 256) 0)) (forall ((v_ArrVal_405 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_405))) (= (select (select .cse0 c_~A~0.base) .cse1) (select (select .cse0 ~queue~0.base) (+ .cse2 ~queue~0.offset))))))) (forall ((v_ArrVal_405 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_405))) (let ((.cse3 (select .cse4 ~queue~0.base))) (or (< (select .cse3 (+ (* c_~start~0 4) ~queue~0.offset)) (+ c_~v_old~0 1)) (not (= (select (select .cse4 c_~A~0.base) .cse1) (select .cse3 (+ .cse2 ~queue~0.offset)))))))))) (and (<= c_~N~0 c_~i~0) (<= c_~end~0 c_~start~0))) is different from false [2023-08-30 20:43:04,208 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* c_~i~0 4))) (.cse2 (* c_~end~0 4))) (and (or (not (= (mod c_~ok~0 256) 0)) (forall ((v_ArrVal_405 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_405))) (= (select (select .cse0 c_~A~0.base) .cse1) (select (select .cse0 ~queue~0.base) (+ .cse2 ~queue~0.offset))))))) (forall ((v_ArrVal_405 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_405))) (let ((.cse3 (select .cse4 ~queue~0.base))) (or (< (select .cse3 (+ (* c_~start~0 4) ~queue~0.offset)) (+ c_~v_old~0 1)) (not (= (select (select .cse4 c_~A~0.base) .cse1) (select .cse3 (+ .cse2 ~queue~0.offset)))))))))) is different from false [2023-08-30 20:43:04,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:43:04,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1886 treesize of output 1758 [2023-08-30 20:43:04,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:43:04,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 792 treesize of output 771 [2023-08-30 20:43:04,461 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:43:04,462 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 690 treesize of output 623 [2023-08-30 20:43:04,494 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:43:04,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 582 treesize of output 503 [2023-08-30 20:43:28,632 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 1 not checked. [2023-08-30 20:43:28,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821140482] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:43:28,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:43:28,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 32 [2023-08-30 20:43:28,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957584736] [2023-08-30 20:43:28,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:43:28,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 20:43:28,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:43:28,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 20:43:28,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=831, Unknown=2, NotChecked=122, Total=1122 [2023-08-30 20:43:28,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 352 [2023-08-30 20:43:28,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 1438 transitions, 24735 flow. Second operand has 34 states, 34 states have (on average 82.11764705882354) internal successors, (2792), 34 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:43:28,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:43:28,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 352 [2023-08-30 20:43:28,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:43:50,530 INFO L130 PetriNetUnfolder]: 15848/27215 cut-off events. [2023-08-30 20:43:50,530 INFO L131 PetriNetUnfolder]: For 885072/885072 co-relation queries the response was YES. [2023-08-30 20:43:50,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286542 conditions, 27215 events. 15848/27215 cut-off events. For 885072/885072 co-relation queries the response was YES. Maximal size of possible extension queue 1088. Compared 217568 event pairs, 1284 based on Foata normal form. 14/27229 useless extension candidates. Maximal degree in co-relation 285626. Up to 9081 conditions per place. [2023-08-30 20:43:50,889 INFO L137 encePairwiseOnDemand]: 336/352 looper letters, 1273 selfloop transitions, 787 changer transitions 97/2157 dead transitions. [2023-08-30 20:43:50,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 2157 transitions, 43133 flow [2023-08-30 20:43:50,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-30 20:43:50,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-30 20:43:50,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3852 transitions. [2023-08-30 20:43:50,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2431818181818182 [2023-08-30 20:43:50,895 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3852 transitions. [2023-08-30 20:43:50,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3852 transitions. [2023-08-30 20:43:50,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:43:50,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3852 transitions. [2023-08-30 20:43:50,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 85.6) internal successors, (3852), 45 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:43:50,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 352.0) internal successors, (16192), 46 states have internal predecessors, (16192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:43:50,912 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 352.0) internal successors, (16192), 46 states have internal predecessors, (16192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:43:50,912 INFO L175 Difference]: Start difference. First operand has 325 places, 1438 transitions, 24735 flow. Second operand 45 states and 3852 transitions. [2023-08-30 20:43:50,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 2157 transitions, 43133 flow [2023-08-30 20:44:01,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 2157 transitions, 39435 flow, removed 1816 selfloop flow, removed 16 redundant places. [2023-08-30 20:44:01,479 INFO L231 Difference]: Finished difference. Result has 354 places, 1715 transitions, 29865 flow [2023-08-30 20:44:01,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=22812, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=527, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=790, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=29865, PETRI_PLACES=354, PETRI_TRANSITIONS=1715} [2023-08-30 20:44:01,480 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 329 predicate places. [2023-08-30 20:44:01,481 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 1715 transitions, 29865 flow [2023-08-30 20:44:01,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 82.11764705882354) internal successors, (2792), 34 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:44:01,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:44:01,481 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:44:01,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 20:44:01,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 20:44:01,682 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:44:01,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:44:01,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2087366540, now seen corresponding path program 7 times [2023-08-30 20:44:01,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:44:01,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214116844] [2023-08-30 20:44:01,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:44:01,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:44:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:44:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:44:03,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:44:03,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214116844] [2023-08-30 20:44:03,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214116844] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:44:03,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133799416] [2023-08-30 20:44:03,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:44:03,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:44:03,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:44:03,417 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:44:03,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 20:44:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:44:03,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 20:44:03,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:44:03,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:44:03,871 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-30 20:44:03,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 44 [2023-08-30 20:44:03,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-08-30 20:44:04,015 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 23 treesize of output 7 [2023-08-30 20:44:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:44:04,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:44:04,412 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:44:04,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 135 [2023-08-30 20:44:04,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2023-08-30 20:44:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 20:44:04,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133799416] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:44:04,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:44:04,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 34 [2023-08-30 20:44:04,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203015553] [2023-08-30 20:44:04,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:44:04,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 20:44:04,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:44:04,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 20:44:04,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2023-08-30 20:44:07,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 352 [2023-08-30 20:44:07,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 1715 transitions, 29865 flow. Second operand has 36 states, 36 states have (on average 113.0) internal successors, (4068), 36 states have internal predecessors, (4068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:44:07,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:44:07,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 352 [2023-08-30 20:44:07,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:44:20,419 INFO L130 PetriNetUnfolder]: 17913/30707 cut-off events. [2023-08-30 20:44:20,419 INFO L131 PetriNetUnfolder]: For 887668/887668 co-relation queries the response was YES. [2023-08-30 20:44:20,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314849 conditions, 30707 events. 17913/30707 cut-off events. For 887668/887668 co-relation queries the response was YES. Maximal size of possible extension queue 1219. Compared 249370 event pairs, 537 based on Foata normal form. 14/30721 useless extension candidates. Maximal degree in co-relation 314706. Up to 10841 conditions per place. [2023-08-30 20:44:20,871 INFO L137 encePairwiseOnDemand]: 338/352 looper letters, 1227 selfloop transitions, 918 changer transitions 97/2242 dead transitions. [2023-08-30 20:44:20,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 2242 transitions, 44448 flow [2023-08-30 20:44:20,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 20:44:20,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 20:44:20,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2000 transitions. [2023-08-30 20:44:20,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3342245989304813 [2023-08-30 20:44:20,874 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2000 transitions. [2023-08-30 20:44:20,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2000 transitions. [2023-08-30 20:44:20,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:44:20,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2000 transitions. [2023-08-30 20:44:20,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 117.6470588235294) internal successors, (2000), 17 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:44:20,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 352.0) internal successors, (6336), 18 states have internal predecessors, (6336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:44:20,881 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 352.0) internal successors, (6336), 18 states have internal predecessors, (6336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:44:20,881 INFO L175 Difference]: Start difference. First operand has 354 places, 1715 transitions, 29865 flow. Second operand 17 states and 2000 transitions. [2023-08-30 20:44:20,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 2242 transitions, 44448 flow [2023-08-30 20:44:32,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 2242 transitions, 44172 flow, removed 116 selfloop flow, removed 13 redundant places. [2023-08-30 20:44:32,651 INFO L231 Difference]: Finished difference. Result has 361 places, 1838 transitions, 35186 flow [2023-08-30 20:44:32,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=29649, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=785, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=846, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=35186, PETRI_PLACES=361, PETRI_TRANSITIONS=1838} [2023-08-30 20:44:32,654 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 336 predicate places. [2023-08-30 20:44:32,654 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 1838 transitions, 35186 flow [2023-08-30 20:44:32,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 113.0) internal successors, (4068), 36 states have internal predecessors, (4068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:44:32,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:44:32,655 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:44:32,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 20:44:32,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 20:44:32,860 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:44:32,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:44:32,861 INFO L85 PathProgramCache]: Analyzing trace with hash -517867998, now seen corresponding path program 8 times [2023-08-30 20:44:32,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:44:32,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752039817] [2023-08-30 20:44:32,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:44:32,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:44:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:44:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:44:34,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:44:34,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752039817] [2023-08-30 20:44:34,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752039817] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:44:34,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113318872] [2023-08-30 20:44:34,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:44:34,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:44:34,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:44:34,161 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:44:34,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 20:44:34,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:44:34,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:44:34,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 20:44:34,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:44:34,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 20:44:34,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:44:34,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 20:44:34,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:44:34,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 20:44:34,990 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-08-30 20:44:34,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2023-08-30 20:44:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:44:35,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:44:39,331 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~end~0 4)) (.cse3 (+ c_~A~0.offset (* c_~i~0 4)))) (and (forall ((v_ArrVal_514 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_514))) (let ((.cse0 (select .cse2 ~queue~0.base))) (or (< (select .cse0 (+ (* c_~start~0 4) ~queue~0.offset)) (+ c_~v_old~0 1)) (not (= (select .cse0 (+ .cse1 ~queue~0.offset)) (select (select .cse2 c_~A~0.base) .cse3))))))) (or (forall ((v_ArrVal_514 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (not (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_514))) (= (select (select .cse4 ~queue~0.base) (+ .cse1 ~queue~0.offset)) (select (select .cse4 c_~A~0.base) .cse3))))) (not (= (mod c_~ok~0 256) 0))))) is different from false [2023-08-30 20:44:39,390 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~end~0 4)) (.cse2 (+ (* c_~i~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (or (forall ((v_ArrVal_513 (Array Int Int)) (v_ArrVal_514 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (not (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_513) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_514))) (= (select (select .cse0 ~queue~0.base) (+ .cse1 ~queue~0.offset)) (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2))))) (not (= (mod c_~ok~0 256) 0))) (forall ((v_ArrVal_513 (Array Int Int)) (v_ArrVal_514 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (let ((.cse4 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_513) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_514))) (let ((.cse3 (select .cse4 ~queue~0.base))) (or (not (= (select .cse3 (+ .cse1 ~queue~0.offset)) (select (select .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2))) (< (select .cse3 (+ (* c_~start~0 4) ~queue~0.offset)) (+ (select (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 1)))))))) is different from false [2023-08-30 20:44:39,402 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:44:39,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2023-08-30 20:44:39,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:44:39,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 422 treesize of output 378 [2023-08-30 20:44:39,426 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:44:39,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 358 treesize of output 279 [2023-08-30 20:44:39,439 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:44:39,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 231 [2023-08-30 20:44:39,639 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:44:39,639 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 74 [2023-08-30 20:44:39,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:44:39,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 979 treesize of output 951 [2023-08-30 20:44:39,699 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-08-30 20:44:39,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 667 treesize of output 672 [2023-08-30 20:44:39,745 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:44:39,745 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 569 treesize of output 543 [2023-08-30 20:44:39,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:44:39,772 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 586 treesize of output 494 [2023-08-30 20:44:44,077 INFO L321 Elim1Store]: treesize reduction 29, result has 60.3 percent of original size [2023-08-30 20:44:44,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 53 [2023-08-30 20:44:44,101 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2023-08-30 20:44:44,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 20:44:44,142 INFO L321 Elim1Store]: treesize reduction 29, result has 60.3 percent of original size [2023-08-30 20:44:44,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 53 [2023-08-30 20:44:44,159 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 20:44:44,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 20:44:44,169 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2023-08-30 20:44:44,169 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 26 treesize of output 1 [2023-08-30 20:44:44,176 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 20:44:44,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-08-30 20:44:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 2 not checked. [2023-08-30 20:44:44,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113318872] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:44:44,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:44:44,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 9] total 34 [2023-08-30 20:44:44,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941719555] [2023-08-30 20:44:44,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:44:44,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 20:44:44,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:44:44,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 20:44:44,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=942, Unknown=3, NotChecked=130, Total=1260 [2023-08-30 20:44:44,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 352 [2023-08-30 20:44:44,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 1838 transitions, 35186 flow. Second operand has 36 states, 36 states have (on average 86.05555555555556) internal successors, (3098), 36 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:44:44,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:44:44,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 352 [2023-08-30 20:44:44,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:45:00,951 INFO L130 PetriNetUnfolder]: 19430/32918 cut-off events. [2023-08-30 20:45:00,951 INFO L131 PetriNetUnfolder]: For 1066070/1066070 co-relation queries the response was YES. [2023-08-30 20:45:01,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356881 conditions, 32918 events. 19430/32918 cut-off events. For 1066070/1066070 co-relation queries the response was YES. Maximal size of possible extension queue 1253. Compared 264356 event pairs, 1127 based on Foata normal form. 14/32932 useless extension candidates. Maximal degree in co-relation 356708. Up to 11739 conditions per place. [2023-08-30 20:45:01,604 INFO L137 encePairwiseOnDemand]: 338/352 looper letters, 1314 selfloop transitions, 1034 changer transitions 91/2439 dead transitions. [2023-08-30 20:45:01,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 2439 transitions, 51255 flow [2023-08-30 20:45:01,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 20:45:01,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 20:45:01,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2526 transitions. [2023-08-30 20:45:01,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2562905844155844 [2023-08-30 20:45:01,608 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2526 transitions. [2023-08-30 20:45:01,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2526 transitions. [2023-08-30 20:45:01,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:45:01,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2526 transitions. [2023-08-30 20:45:01,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 90.21428571428571) internal successors, (2526), 28 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:01,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 352.0) internal successors, (10208), 29 states have internal predecessors, (10208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:01,618 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 352.0) internal successors, (10208), 29 states have internal predecessors, (10208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:01,618 INFO L175 Difference]: Start difference. First operand has 361 places, 1838 transitions, 35186 flow. Second operand 28 states and 2526 transitions. [2023-08-30 20:45:01,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 2439 transitions, 51255 flow [2023-08-30 20:45:16,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 2439 transitions, 50424 flow, removed 243 selfloop flow, removed 12 redundant places. [2023-08-30 20:45:16,876 INFO L231 Difference]: Finished difference. Result has 380 places, 2015 transitions, 41510 flow [2023-08-30 20:45:16,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=34690, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=845, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=926, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=41510, PETRI_PLACES=380, PETRI_TRANSITIONS=2015} [2023-08-30 20:45:16,878 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 355 predicate places. [2023-08-30 20:45:16,878 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 2015 transitions, 41510 flow [2023-08-30 20:45:16,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 86.05555555555556) internal successors, (3098), 36 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:16,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:45:16,879 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:45:16,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 20:45:17,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 20:45:17,079 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:45:17,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:45:17,080 INFO L85 PathProgramCache]: Analyzing trace with hash 152669718, now seen corresponding path program 9 times [2023-08-30 20:45:17,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:45:17,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948702295] [2023-08-30 20:45:17,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:45:17,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:45:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:45:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-30 20:45:17,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:45:17,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948702295] [2023-08-30 20:45:17,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948702295] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:45:17,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644274157] [2023-08-30 20:45:17,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:45:17,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:45:17,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:45:17,189 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:45:17,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 20:45:17,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:45:17,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:45:17,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 20:45:17,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:45:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:45:17,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:45:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:45:17,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644274157] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:45:17,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:45:17,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-30 20:45:17,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101434697] [2023-08-30 20:45:17,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:45:17,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 20:45:17,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:45:17,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 20:45:17,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-08-30 20:45:18,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 352 [2023-08-30 20:45:18,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 2015 transitions, 41510 flow. Second operand has 17 states, 17 states have (on average 140.94117647058823) internal successors, (2396), 17 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:18,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:45:18,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 352 [2023-08-30 20:45:18,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:45:29,510 INFO L130 PetriNetUnfolder]: 13404/23575 cut-off events. [2023-08-30 20:45:29,510 INFO L131 PetriNetUnfolder]: For 864469/864539 co-relation queries the response was YES. [2023-08-30 20:45:29,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262458 conditions, 23575 events. 13404/23575 cut-off events. For 864469/864539 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 188298 event pairs, 834 based on Foata normal form. 1074/24618 useless extension candidates. Maximal degree in co-relation 262288. Up to 12130 conditions per place. [2023-08-30 20:45:29,857 INFO L137 encePairwiseOnDemand]: 341/352 looper letters, 987 selfloop transitions, 111 changer transitions 1050/2223 dead transitions. [2023-08-30 20:45:29,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 2223 transitions, 47843 flow [2023-08-30 20:45:29,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 20:45:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 20:45:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3715 transitions. [2023-08-30 20:45:29,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4059222027972028 [2023-08-30 20:45:29,861 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3715 transitions. [2023-08-30 20:45:29,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3715 transitions. [2023-08-30 20:45:29,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:45:29,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3715 transitions. [2023-08-30 20:45:29,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 142.8846153846154) internal successors, (3715), 26 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:29,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 352.0) internal successors, (9504), 27 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:29,870 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 352.0) internal successors, (9504), 27 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:29,871 INFO L175 Difference]: Start difference. First operand has 380 places, 2015 transitions, 41510 flow. Second operand 26 states and 3715 transitions. [2023-08-30 20:45:29,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 2223 transitions, 47843 flow [2023-08-30 20:45:37,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 2223 transitions, 46130 flow, removed 328 selfloop flow, removed 13 redundant places. [2023-08-30 20:45:37,630 INFO L231 Difference]: Finished difference. Result has 392 places, 1025 transitions, 20970 flow [2023-08-30 20:45:37,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=32960, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=20970, PETRI_PLACES=392, PETRI_TRANSITIONS=1025} [2023-08-30 20:45:37,631 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 367 predicate places. [2023-08-30 20:45:37,631 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 1025 transitions, 20970 flow [2023-08-30 20:45:37,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 140.94117647058823) internal successors, (2396), 17 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:37,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:45:37,632 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:45:37,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 20:45:37,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 20:45:37,839 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:45:37,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:45:37,839 INFO L85 PathProgramCache]: Analyzing trace with hash 128257740, now seen corresponding path program 10 times [2023-08-30 20:45:37,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:45:37,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169680794] [2023-08-30 20:45:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:45:37,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:45:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:45:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:45:39,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:45:39,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169680794] [2023-08-30 20:45:39,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169680794] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:45:39,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716860232] [2023-08-30 20:45:39,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:45:39,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:45:39,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:45:39,716 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:45:39,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 20:45:39,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:45:39,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:45:39,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 67 conjunts are in the unsatisfiable core [2023-08-30 20:45:39,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:45:39,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:45:39,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:45:39,883 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 20:45:39,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 20:45:40,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 20:45:40,063 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:45:40,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 20:45:40,107 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 6 treesize of output 5 [2023-08-30 20:45:40,131 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 6 treesize of output 5 [2023-08-30 20:45:40,177 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 6 treesize of output 5 [2023-08-30 20:45:40,241 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 6 treesize of output 5 [2023-08-30 20:45:43,103 INFO L321 Elim1Store]: treesize reduction 41, result has 54.9 percent of original size [2023-08-30 20:45:43,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 65 [2023-08-30 20:45:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:45:43,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:45:45,133 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:45:45,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 251 treesize of output 167 [2023-08-30 20:45:45,341 INFO L321 Elim1Store]: treesize reduction 13, result has 93.5 percent of original size [2023-08-30 20:45:45,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 7507 treesize of output 7117 [2023-08-30 20:45:45,785 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:45:45,789 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:45:45,855 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:45:45,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 3550 treesize of output 2810 [2023-08-30 20:45:45,949 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:45:45,956 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:45:46,032 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:45:46,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 2650 treesize of output 2360 [2023-08-30 20:45:46,111 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:45:46,118 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:45:46,187 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:45:46,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 2098 treesize of output 2033 Killed by 15