./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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 ../sv-benchmarks/c/pthread/triangular-longer-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1e30b67a045ce6921ac9aa6cdcebddb50c3d7d787a6b9dd7b66c9173f916fde4 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:23:37,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:23:37,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:23:37,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:23:37,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:23:37,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:23:37,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:23:37,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:23:37,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:23:37,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:23:37,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:23:37,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:23:37,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:23:37,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:23:37,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:23:37,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:23:37,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:23:37,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:23:37,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:23:37,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:23:37,134 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:23:37,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:23:37,135 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:23:37,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:23:37,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:23:37,140 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:23:37,140 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:23:37,140 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:23:37,141 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:23:37,142 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:23:37,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:23:37,143 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:23:37,143 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:23:37,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:23:37,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:23:37,146 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:23:37,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:23:37,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:23:37,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:23:37,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:23:37,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:23:37,148 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:23:37,174 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:23:37,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:23:37,174 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:23:37,174 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:23:37,175 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:23:37,175 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:23:37,176 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:23:37,176 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:23:37,176 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:23:37,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:23:37,177 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:23:37,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:23:37,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:23:37,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:23:37,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:23:37,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:23:37,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:23:37,178 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:23:37,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:23:37,178 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:23:37,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:23:37,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:23:37,179 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:23:37,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:23:37,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:23:37,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:23:37,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:23:37,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:23:37,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:23:37,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:23:37,180 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:23:37,180 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:23:37,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:23:37,180 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:23:37,180 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e30b67a045ce6921ac9aa6cdcebddb50c3d7d787a6b9dd7b66c9173f916fde4 [2021-12-22 13:23:37,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:23:37,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:23:37,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:23:37,376 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:23:37,376 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:23:37,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-longer-1.i [2021-12-22 13:23:37,429 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/836ea48ad/84582beb1f564953a9c3b3ff9f3c87d9/FLAG64fac002f [2021-12-22 13:23:37,798 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:23:37,806 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-1.i [2021-12-22 13:23:37,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/836ea48ad/84582beb1f564953a9c3b3ff9f3c87d9/FLAG64fac002f [2021-12-22 13:23:38,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/836ea48ad/84582beb1f564953a9c3b3ff9f3c87d9 [2021-12-22 13:23:38,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:23:38,171 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:23:38,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:23:38,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:23:38,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:23:38,175 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:23:38" (1/1) ... [2021-12-22 13:23:38,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62d4a362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:38, skipping insertion in model container [2021-12-22 13:23:38,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:23:38" (1/1) ... [2021-12-22 13:23:38,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:23:38,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:23:38,656 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-1.i[30961,30974] [2021-12-22 13:23:38,658 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:23:38,663 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:23:38,700 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-1.i[30961,30974] [2021-12-22 13:23:38,705 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:23:38,731 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:23:38,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:38 WrapperNode [2021-12-22 13:23:38,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:23:38,733 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:23:38,733 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:23:38,733 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:23:38,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:38" (1/1) ... [2021-12-22 13:23:38,760 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:38" (1/1) ... [2021-12-22 13:23:38,775 INFO L137 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2021-12-22 13:23:38,775 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:23:38,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:23:38,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:23:38,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:23:38,782 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:38" (1/1) ... [2021-12-22 13:23:38,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:38" (1/1) ... [2021-12-22 13:23:38,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:38" (1/1) ... [2021-12-22 13:23:38,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:38" (1/1) ... [2021-12-22 13:23:38,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:38" (1/1) ... [2021-12-22 13:23:38,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:38" (1/1) ... [2021-12-22 13:23:38,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:38" (1/1) ... [2021-12-22 13:23:38,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:23:38,814 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:23:38,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:23:38,815 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:23:38,816 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:38" (1/1) ... [2021-12-22 13:23:38,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:23:38,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:23:38,849 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) [2021-12-22 13:23:38,903 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 [2021-12-22 13:23:38,914 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-12-22 13:23:38,915 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-12-22 13:23:38,915 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-12-22 13:23:38,915 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-12-22 13:23:38,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:23:38,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-22 13:23:38,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:23:38,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:23:38,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:23:38,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:23:38,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-22 13:23:38,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:23:38,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:23:38,917 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-22 13:23:39,035 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:23:39,052 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:23:39,186 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:23:39,190 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:23:39,191 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 13:23:39,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:23:39 BoogieIcfgContainer [2021-12-22 13:23:39,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:23:39,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:23:39,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:23:39,197 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:23:39,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:23:38" (1/3) ... [2021-12-22 13:23:39,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d97a5e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:23:39, skipping insertion in model container [2021-12-22 13:23:39,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:38" (2/3) ... [2021-12-22 13:23:39,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d97a5e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:23:39, skipping insertion in model container [2021-12-22 13:23:39,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:23:39" (3/3) ... [2021-12-22 13:23:39,200 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2021-12-22 13:23:39,204 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-22 13:23:39,204 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:23:39,204 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:23:39,205 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-22 13:23:39,236 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,236 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,237 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,237 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,237 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,237 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,237 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,238 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,238 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,238 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,239 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,239 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,240 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,240 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,240 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,241 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,241 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,241 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,241 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,243 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,244 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,244 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,245 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,245 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,246 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,246 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,246 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,247 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,248 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,248 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,248 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,248 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,248 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,249 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,249 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,249 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,249 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,250 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,250 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,250 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,250 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,251 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,251 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,251 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,252 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,252 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,252 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,252 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,253 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,253 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,253 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,253 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,254 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,254 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,254 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,254 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,256 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,257 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,257 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,257 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,257 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,257 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,261 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,261 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,262 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,262 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,262 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,262 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:23:39,263 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-12-22 13:23:39,304 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:23:39,310 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 13:23:39,311 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-22 13:23:39,319 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 150 flow [2021-12-22 13:23:39,355 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2021-12-22 13:23:39,355 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-22 13:23:39,359 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 68 events. 5/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2021-12-22 13:23:39,360 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 70 transitions, 150 flow [2021-12-22 13:23:39,364 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 142 flow [2021-12-22 13:23:39,381 INFO L129 PetriNetUnfolder]: 4/58 cut-off events. [2021-12-22 13:23:39,381 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-22 13:23:39,382 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:23:39,383 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:23:39,385 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:23:39,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:23:39,390 INFO L85 PathProgramCache]: Analyzing trace with hash 398220865, now seen corresponding path program 1 times [2021-12-22 13:23:39,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:23:39,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150591423] [2021-12-22 13:23:39,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:23:39,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:23:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:23:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:23:39,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:23:39,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150591423] [2021-12-22 13:23:39,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150591423] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:23:39,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:23:39,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:23:39,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040461110] [2021-12-22 13:23:39,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:23:39,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:23:39,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:23:39,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:23:39,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:23:39,731 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-22 13:23:39,736 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:39,736 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:23:39,736 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-22 13:23:39,737 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:23:39,880 INFO L129 PetriNetUnfolder]: 42/210 cut-off events. [2021-12-22 13:23:39,881 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-22 13:23:39,883 INFO L84 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 210 events. 42/210 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 816 event pairs, 3 based on Foata normal form. 46/240 useless extension candidates. Maximal degree in co-relation 257. Up to 28 conditions per place. [2021-12-22 13:23:39,885 INFO L132 encePairwiseOnDemand]: 59/70 looper letters, 22 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2021-12-22 13:23:39,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 271 flow [2021-12-22 13:23:39,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:23:39,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:23:39,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 613 transitions. [2021-12-22 13:23:39,899 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8757142857142857 [2021-12-22 13:23:39,900 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 613 transitions. [2021-12-22 13:23:39,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 613 transitions. [2021-12-22 13:23:39,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:23:39,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 613 transitions. [2021-12-22 13:23:39,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.3) internal successors, (613), 10 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) [2021-12-22 13:23:39,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:39,914 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:39,915 INFO L186 Difference]: Start difference. First operand has 70 places, 68 transitions, 142 flow. Second operand 10 states and 613 transitions. [2021-12-22 13:23:39,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 271 flow [2021-12-22 13:23:39,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-22 13:23:39,922 INFO L242 Difference]: Finished difference. Result has 85 places, 85 transitions, 276 flow [2021-12-22 13:23:39,923 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=276, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2021-12-22 13:23:39,927 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2021-12-22 13:23:39,927 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 276 flow [2021-12-22 13:23:39,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:39,927 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:23:39,927 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:23:39,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:23:39,928 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:23:39,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:23:39,928 INFO L85 PathProgramCache]: Analyzing trace with hash 245149124, now seen corresponding path program 1 times [2021-12-22 13:23:39,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:23:39,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317525842] [2021-12-22 13:23:39,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:23:39,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:23:39,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:23:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:23:40,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:23:40,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317525842] [2021-12-22 13:23:40,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317525842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:23:40,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:23:40,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:23:40,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204346079] [2021-12-22 13:23:40,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:23:40,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:23:40,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:23:40,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:23:40,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:23:40,078 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-22 13:23:40,079 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:40,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:23:40,079 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-22 13:23:40,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:23:40,228 INFO L129 PetriNetUnfolder]: 46/218 cut-off events. [2021-12-22 13:23:40,228 INFO L130 PetriNetUnfolder]: For 111/114 co-relation queries the response was YES. [2021-12-22 13:23:40,243 INFO L84 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 218 events. 46/218 cut-off events. For 111/114 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 848 event pairs, 0 based on Foata normal form. 3/205 useless extension candidates. Maximal degree in co-relation 377. Up to 35 conditions per place. [2021-12-22 13:23:40,244 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 16 selfloop transitions, 9 changer transitions 40/110 dead transitions. [2021-12-22 13:23:40,244 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 110 transitions, 508 flow [2021-12-22 13:23:40,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:23:40,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-22 13:23:40,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 475 transitions. [2021-12-22 13:23:40,246 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8482142857142857 [2021-12-22 13:23:40,246 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 475 transitions. [2021-12-22 13:23:40,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 475 transitions. [2021-12-22 13:23:40,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:23:40,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 475 transitions. [2021-12-22 13:23:40,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 59.375) internal successors, (475), 8 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:40,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:40,249 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:40,249 INFO L186 Difference]: Start difference. First operand has 85 places, 85 transitions, 276 flow. Second operand 8 states and 475 transitions. [2021-12-22 13:23:40,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 110 transitions, 508 flow [2021-12-22 13:23:40,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 110 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:23:40,253 INFO L242 Difference]: Finished difference. Result has 96 places, 67 transitions, 237 flow [2021-12-22 13:23:40,253 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=237, PETRI_PLACES=96, PETRI_TRANSITIONS=67} [2021-12-22 13:23:40,254 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2021-12-22 13:23:40,254 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 67 transitions, 237 flow [2021-12-22 13:23:40,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:40,254 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:23:40,254 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:23:40,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:23:40,255 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:23:40,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:23:40,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1444168350, now seen corresponding path program 1 times [2021-12-22 13:23:40,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:23:40,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053418279] [2021-12-22 13:23:40,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:23:40,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:23:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:23:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:23:40,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:23:40,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053418279] [2021-12-22 13:23:40,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053418279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:23:40,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:23:40,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:23:40,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702221856] [2021-12-22 13:23:40,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:23:40,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:23:40,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:23:40,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:23:40,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:23:40,370 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-22 13:23:40,383 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 67 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:40,384 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:23:40,384 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-22 13:23:40,384 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:23:40,468 INFO L129 PetriNetUnfolder]: 37/188 cut-off events. [2021-12-22 13:23:40,468 INFO L130 PetriNetUnfolder]: For 251/258 co-relation queries the response was YES. [2021-12-22 13:23:40,469 INFO L84 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 188 events. 37/188 cut-off events. For 251/258 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 602 event pairs, 0 based on Foata normal form. 10/180 useless extension candidates. Maximal degree in co-relation 354. Up to 35 conditions per place. [2021-12-22 13:23:40,469 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 23 selfloop transitions, 11 changer transitions 8/87 dead transitions. [2021-12-22 13:23:40,469 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 457 flow [2021-12-22 13:23:40,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:23:40,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:23:40,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2021-12-22 13:23:40,471 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2021-12-22 13:23:40,471 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2021-12-22 13:23:40,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2021-12-22 13:23:40,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:23:40,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2021-12-22 13:23:40,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.888888888888886) internal successors, (530), 9 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:40,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:40,474 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:40,474 INFO L186 Difference]: Start difference. First operand has 96 places, 67 transitions, 237 flow. Second operand 9 states and 530 transitions. [2021-12-22 13:23:40,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 457 flow [2021-12-22 13:23:40,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 387 flow, removed 25 selfloop flow, removed 9 redundant places. [2021-12-22 13:23:40,477 INFO L242 Difference]: Finished difference. Result has 86 places, 72 transitions, 289 flow [2021-12-22 13:23:40,477 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=289, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2021-12-22 13:23:40,478 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2021-12-22 13:23:40,478 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 289 flow [2021-12-22 13:23:40,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:40,478 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:23:40,478 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:23:40,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:23:40,479 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:23:40,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:23:40,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1245653052, now seen corresponding path program 2 times [2021-12-22 13:23:40,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:23:40,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228128711] [2021-12-22 13:23:40,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:23:40,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:23:40,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:23:40,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:23:40,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:23:40,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228128711] [2021-12-22 13:23:40,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228128711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:23:40,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:23:40,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:23:40,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470915915] [2021-12-22 13:23:40,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:23:40,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:23:40,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:23:40,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:23:40,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:23:40,554 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-22 13:23:40,555 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:40,555 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:23:40,555 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-22 13:23:40,555 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:23:40,623 INFO L129 PetriNetUnfolder]: 30/177 cut-off events. [2021-12-22 13:23:40,623 INFO L130 PetriNetUnfolder]: For 232/248 co-relation queries the response was YES. [2021-12-22 13:23:40,624 INFO L84 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 177 events. 30/177 cut-off events. For 232/248 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 550 event pairs, 0 based on Foata normal form. 16/176 useless extension candidates. Maximal degree in co-relation 365. Up to 32 conditions per place. [2021-12-22 13:23:40,625 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 19 selfloop transitions, 12 changer transitions 11/87 dead transitions. [2021-12-22 13:23:40,625 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 87 transitions, 487 flow [2021-12-22 13:23:40,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:23:40,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:23:40,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 524 transitions. [2021-12-22 13:23:40,626 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8317460317460318 [2021-12-22 13:23:40,626 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 524 transitions. [2021-12-22 13:23:40,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 524 transitions. [2021-12-22 13:23:40,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:23:40,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 524 transitions. [2021-12-22 13:23:40,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:40,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:40,629 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:40,629 INFO L186 Difference]: Start difference. First operand has 86 places, 72 transitions, 289 flow. Second operand 9 states and 524 transitions. [2021-12-22 13:23:40,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 87 transitions, 487 flow [2021-12-22 13:23:40,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 467 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-12-22 13:23:40,632 INFO L242 Difference]: Finished difference. Result has 93 places, 73 transitions, 332 flow [2021-12-22 13:23:40,632 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=332, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2021-12-22 13:23:40,633 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 23 predicate places. [2021-12-22 13:23:40,633 INFO L470 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 332 flow [2021-12-22 13:23:40,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:40,633 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:23:40,633 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:23:40,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:23:40,634 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:23:40,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:23:40,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1734522485, now seen corresponding path program 1 times [2021-12-22 13:23:40,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:23:40,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238819838] [2021-12-22 13:23:40,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:23:40,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:23:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:23:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:23:40,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:23:40,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238819838] [2021-12-22 13:23:40,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238819838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:23:40,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:23:40,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:23:40,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214730191] [2021-12-22 13:23:40,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:23:40,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:23:40,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:23:40,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:23:40,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:23:40,723 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-22 13:23:40,724 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 332 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:40,724 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:23:40,724 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-22 13:23:40,724 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:23:40,847 INFO L129 PetriNetUnfolder]: 32/173 cut-off events. [2021-12-22 13:23:40,847 INFO L130 PetriNetUnfolder]: For 432/450 co-relation queries the response was YES. [2021-12-22 13:23:40,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 173 events. 32/173 cut-off events. For 432/450 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 519 event pairs, 1 based on Foata normal form. 15/173 useless extension candidates. Maximal degree in co-relation 404. Up to 36 conditions per place. [2021-12-22 13:23:40,849 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 19 selfloop transitions, 19 changer transitions 8/91 dead transitions. [2021-12-22 13:23:40,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 91 transitions, 584 flow [2021-12-22 13:23:40,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:23:40,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-22 13:23:40,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 638 transitions. [2021-12-22 13:23:40,850 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2021-12-22 13:23:40,850 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 638 transitions. [2021-12-22 13:23:40,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 638 transitions. [2021-12-22 13:23:40,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:23:40,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 638 transitions. [2021-12-22 13:23:40,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:40,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:40,853 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:40,854 INFO L186 Difference]: Start difference. First operand has 93 places, 73 transitions, 332 flow. Second operand 11 states and 638 transitions. [2021-12-22 13:23:40,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 91 transitions, 584 flow [2021-12-22 13:23:40,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 498 flow, removed 30 selfloop flow, removed 10 redundant places. [2021-12-22 13:23:40,857 INFO L242 Difference]: Finished difference. Result has 96 places, 77 transitions, 390 flow [2021-12-22 13:23:40,857 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=390, PETRI_PLACES=96, PETRI_TRANSITIONS=77} [2021-12-22 13:23:40,858 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2021-12-22 13:23:40,858 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 77 transitions, 390 flow [2021-12-22 13:23:40,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:40,858 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:23:40,858 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:23:40,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:23:40,859 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:23:40,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:23:40,859 INFO L85 PathProgramCache]: Analyzing trace with hash -949175033, now seen corresponding path program 2 times [2021-12-22 13:23:40,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:23:40,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798917552] [2021-12-22 13:23:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:23:40,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:23:40,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:23:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:23:40,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:23:40,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798917552] [2021-12-22 13:23:40,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798917552] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:23:40,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:23:40,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:23:40,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427604719] [2021-12-22 13:23:40,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:23:40,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:23:40,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:23:40,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:23:40,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:23:40,914 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-22 13:23:40,915 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 77 transitions, 390 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:40,915 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:23:40,915 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-22 13:23:40,915 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:23:41,025 INFO L129 PetriNetUnfolder]: 33/189 cut-off events. [2021-12-22 13:23:41,025 INFO L130 PetriNetUnfolder]: For 497/515 co-relation queries the response was YES. [2021-12-22 13:23:41,026 INFO L84 FinitePrefix]: Finished finitePrefix Result has 514 conditions, 189 events. 33/189 cut-off events. For 497/515 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 665 event pairs, 0 based on Foata normal form. 16/188 useless extension candidates. Maximal degree in co-relation 473. Up to 38 conditions per place. [2021-12-22 13:23:41,027 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 22 selfloop transitions, 17 changer transitions 5/89 dead transitions. [2021-12-22 13:23:41,027 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 89 transitions, 604 flow [2021-12-22 13:23:41,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:23:41,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-22 13:23:41,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 695 transitions. [2021-12-22 13:23:41,029 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8273809523809523 [2021-12-22 13:23:41,029 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 695 transitions. [2021-12-22 13:23:41,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 695 transitions. [2021-12-22 13:23:41,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:23:41,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 695 transitions. [2021-12-22 13:23:41,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:41,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:41,032 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:41,032 INFO L186 Difference]: Start difference. First operand has 96 places, 77 transitions, 390 flow. Second operand 12 states and 695 transitions. [2021-12-22 13:23:41,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 89 transitions, 604 flow [2021-12-22 13:23:41,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 89 transitions, 563 flow, removed 12 selfloop flow, removed 6 redundant places. [2021-12-22 13:23:41,035 INFO L242 Difference]: Finished difference. Result has 102 places, 80 transitions, 442 flow [2021-12-22 13:23:41,035 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=442, PETRI_PLACES=102, PETRI_TRANSITIONS=80} [2021-12-22 13:23:41,036 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 32 predicate places. [2021-12-22 13:23:41,036 INFO L470 AbstractCegarLoop]: Abstraction has has 102 places, 80 transitions, 442 flow [2021-12-22 13:23:41,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:41,036 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:23:41,036 INFO L254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:23:41,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:23:41,037 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:23:41,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:23:41,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1110018853, now seen corresponding path program 1 times [2021-12-22 13:23:41,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:23:41,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484864676] [2021-12-22 13:23:41,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:23:41,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:23:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:23:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:23:41,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:23:41,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484864676] [2021-12-22 13:23:41,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484864676] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:23:41,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676686695] [2021-12-22 13:23:41,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:23:41,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:23:41,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:23:41,094 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) [2021-12-22 13:23:41,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:23:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:23:41,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 13:23:41,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:23:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:23:41,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:23:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:23:41,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676686695] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:23:41,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:23:41,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-12-22 13:23:41,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529195636] [2021-12-22 13:23:41,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:23:41,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 13:23:41,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:23:41,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 13:23:41,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-12-22 13:23:41,462 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-22 13:23:41,463 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 80 transitions, 442 flow. Second operand has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:41,463 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:23:41,463 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-22 13:23:41,463 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:23:41,690 INFO L129 PetriNetUnfolder]: 51/288 cut-off events. [2021-12-22 13:23:41,691 INFO L130 PetriNetUnfolder]: For 900/931 co-relation queries the response was YES. [2021-12-22 13:23:41,692 INFO L84 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 288 events. 51/288 cut-off events. For 900/931 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1073 event pairs, 1 based on Foata normal form. 19/279 useless extension candidates. Maximal degree in co-relation 752. Up to 60 conditions per place. [2021-12-22 13:23:41,693 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 26 selfloop transitions, 34 changer transitions 14/119 dead transitions. [2021-12-22 13:23:41,693 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 119 transitions, 1052 flow [2021-12-22 13:23:41,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 13:23:41,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-22 13:23:41,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1159 transitions. [2021-12-22 13:23:41,695 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8278571428571428 [2021-12-22 13:23:41,695 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1159 transitions. [2021-12-22 13:23:41,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1159 transitions. [2021-12-22 13:23:41,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:23:41,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1159 transitions. [2021-12-22 13:23:41,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.95) internal successors, (1159), 20 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:41,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:41,700 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:41,700 INFO L186 Difference]: Start difference. First operand has 102 places, 80 transitions, 442 flow. Second operand 20 states and 1159 transitions. [2021-12-22 13:23:41,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 119 transitions, 1052 flow [2021-12-22 13:23:41,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 119 transitions, 1016 flow, removed 10 selfloop flow, removed 7 redundant places. [2021-12-22 13:23:41,704 INFO L242 Difference]: Finished difference. Result has 122 places, 96 transitions, 736 flow [2021-12-22 13:23:41,704 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=736, PETRI_PLACES=122, PETRI_TRANSITIONS=96} [2021-12-22 13:23:41,705 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 52 predicate places. [2021-12-22 13:23:41,705 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 96 transitions, 736 flow [2021-12-22 13:23:41,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:41,705 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:23:41,706 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:23:41,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 13:23:41,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:23:41,939 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:23:41,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:23:41,939 INFO L85 PathProgramCache]: Analyzing trace with hash 936563082, now seen corresponding path program 1 times [2021-12-22 13:23:41,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:23:41,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134860893] [2021-12-22 13:23:41,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:23:41,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:23:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:23:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:23:42,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:23:42,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134860893] [2021-12-22 13:23:42,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134860893] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:23:42,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461198456] [2021-12-22 13:23:42,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:23:42,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:23:42,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:23:42,044 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) [2021-12-22 13:23:42,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:23:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:23:42,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 13:23:42,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:23:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:23:42,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:23:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:23:42,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461198456] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:23:42,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:23:42,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2021-12-22 13:23:42,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819133340] [2021-12-22 13:23:42,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:23:42,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-22 13:23:42,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:23:42,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-22 13:23:42,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:23:42,526 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-22 13:23:42,527 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 96 transitions, 736 flow. Second operand has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:42,527 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:23:42,527 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-22 13:23:42,527 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:23:42,888 INFO L129 PetriNetUnfolder]: 73/413 cut-off events. [2021-12-22 13:23:42,888 INFO L130 PetriNetUnfolder]: For 2658/2717 co-relation queries the response was YES. [2021-12-22 13:23:42,890 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1399 conditions, 413 events. 73/413 cut-off events. For 2658/2717 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1616 event pairs, 0 based on Foata normal form. 23/395 useless extension candidates. Maximal degree in co-relation 1341. Up to 96 conditions per place. [2021-12-22 13:23:42,892 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 55 selfloop transitions, 25 changer transitions 26/151 dead transitions. [2021-12-22 13:23:42,892 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 151 transitions, 1856 flow [2021-12-22 13:23:42,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-22 13:23:42,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-12-22 13:23:42,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1450 transitions. [2021-12-22 13:23:42,895 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2021-12-22 13:23:42,895 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1450 transitions. [2021-12-22 13:23:42,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1450 transitions. [2021-12-22 13:23:42,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:23:42,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1450 transitions. [2021-12-22 13:23:42,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 58.0) internal successors, (1450), 25 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:42,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:42,900 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:42,900 INFO L186 Difference]: Start difference. First operand has 122 places, 96 transitions, 736 flow. Second operand 25 states and 1450 transitions. [2021-12-22 13:23:42,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 151 transitions, 1856 flow [2021-12-22 13:23:42,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 151 transitions, 1453 flow, removed 180 selfloop flow, removed 13 redundant places. [2021-12-22 13:23:42,909 INFO L242 Difference]: Finished difference. Result has 147 places, 110 transitions, 841 flow [2021-12-22 13:23:42,909 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=841, PETRI_PLACES=147, PETRI_TRANSITIONS=110} [2021-12-22 13:23:42,909 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 77 predicate places. [2021-12-22 13:23:42,909 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 110 transitions, 841 flow [2021-12-22 13:23:42,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:42,910 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:23:42,910 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:23:42,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 13:23:43,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-22 13:23:43,128 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:23:43,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:23:43,129 INFO L85 PathProgramCache]: Analyzing trace with hash -2046027908, now seen corresponding path program 2 times [2021-12-22 13:23:43,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:23:43,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561598161] [2021-12-22 13:23:43,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:23:43,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:23:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:23:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:23:43,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:23:43,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561598161] [2021-12-22 13:23:43,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561598161] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:23:43,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103362724] [2021-12-22 13:23:43,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:23:43,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:23:43,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:23:43,220 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) [2021-12-22 13:23:43,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:23:43,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:23:43,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:23:43,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 13:23:43,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:23:43,407 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:23:43,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:23:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:23:43,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103362724] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:23:43,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:23:43,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2021-12-22 13:23:43,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074345318] [2021-12-22 13:23:43,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:23:43,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-22 13:23:43,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:23:43,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-22 13:23:43,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:23:43,653 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-22 13:23:43,654 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 110 transitions, 841 flow. Second operand has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:43,654 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:23:43,654 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-22 13:23:43,655 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:23:44,134 INFO L129 PetriNetUnfolder]: 129/779 cut-off events. [2021-12-22 13:23:44,134 INFO L130 PetriNetUnfolder]: For 12717/12861 co-relation queries the response was YES. [2021-12-22 13:23:44,138 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3179 conditions, 779 events. 129/779 cut-off events. For 12717/12861 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4531 event pairs, 0 based on Foata normal form. 31/731 useless extension candidates. Maximal degree in co-relation 3104. Up to 160 conditions per place. [2021-12-22 13:23:44,141 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 58 selfloop transitions, 81 changer transitions 26/210 dead transitions. [2021-12-22 13:23:44,141 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 210 transitions, 3273 flow [2021-12-22 13:23:44,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-22 13:23:44,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-22 13:23:44,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1915 transitions. [2021-12-22 13:23:44,145 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.829004329004329 [2021-12-22 13:23:44,145 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1915 transitions. [2021-12-22 13:23:44,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1915 transitions. [2021-12-22 13:23:44,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:23:44,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1915 transitions. [2021-12-22 13:23:44,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 58.03030303030303) internal successors, (1915), 33 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:44,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:44,155 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:44,155 INFO L186 Difference]: Start difference. First operand has 147 places, 110 transitions, 841 flow. Second operand 33 states and 1915 transitions. [2021-12-22 13:23:44,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 210 transitions, 3273 flow [2021-12-22 13:23:44,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 210 transitions, 2697 flow, removed 280 selfloop flow, removed 13 redundant places. [2021-12-22 13:23:44,175 INFO L242 Difference]: Finished difference. Result has 180 places, 156 transitions, 1674 flow [2021-12-22 13:23:44,175 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1674, PETRI_PLACES=180, PETRI_TRANSITIONS=156} [2021-12-22 13:23:44,176 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 110 predicate places. [2021-12-22 13:23:44,176 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 156 transitions, 1674 flow [2021-12-22 13:23:44,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:44,177 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:23:44,177 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:23:44,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 13:23:44,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:23:44,394 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:23:44,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:23:44,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1423924408, now seen corresponding path program 3 times [2021-12-22 13:23:44,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:23:44,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25691681] [2021-12-22 13:23:44,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:23:44,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:23:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:23:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:23:44,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:23:44,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25691681] [2021-12-22 13:23:44,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25691681] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:23:44,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864102921] [2021-12-22 13:23:44,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:23:44,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:23:44,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:23:44,511 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) [2021-12-22 13:23:44,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 13:23:44,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-22 13:23:44,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:23:44,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 13:23:44,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:23:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:23:44,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:23:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:23:44,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864102921] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:23:44,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:23:44,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2021-12-22 13:23:44,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521007159] [2021-12-22 13:23:44,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:23:44,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-22 13:23:44,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:23:44,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-22 13:23:44,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:23:44,862 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-22 13:23:44,863 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 156 transitions, 1674 flow. Second operand has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:44,863 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:23:44,863 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-22 13:23:44,863 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:23:45,491 INFO L129 PetriNetUnfolder]: 167/1049 cut-off events. [2021-12-22 13:23:45,491 INFO L130 PetriNetUnfolder]: For 33425/33642 co-relation queries the response was YES. [2021-12-22 13:23:45,498 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5139 conditions, 1049 events. 167/1049 cut-off events. For 33425/33642 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 7171 event pairs, 0 based on Foata normal form. 44/987 useless extension candidates. Maximal degree in co-relation 5048. Up to 212 conditions per place. [2021-12-22 13:23:45,503 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 62 selfloop transitions, 128 changer transitions 31/266 dead transitions. [2021-12-22 13:23:45,503 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 266 transitions, 5247 flow [2021-12-22 13:23:45,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-22 13:23:45,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-22 13:23:45,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2085 transitions. [2021-12-22 13:23:45,505 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8273809523809523 [2021-12-22 13:23:45,505 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2085 transitions. [2021-12-22 13:23:45,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2085 transitions. [2021-12-22 13:23:45,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:23:45,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2085 transitions. [2021-12-22 13:23:45,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 57.916666666666664) internal successors, (2085), 36 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:45,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 70.0) internal successors, (2590), 37 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:45,515 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 70.0) internal successors, (2590), 37 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:45,515 INFO L186 Difference]: Start difference. First operand has 180 places, 156 transitions, 1674 flow. Second operand 36 states and 2085 transitions. [2021-12-22 13:23:45,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 266 transitions, 5247 flow [2021-12-22 13:23:45,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 266 transitions, 4417 flow, removed 399 selfloop flow, removed 18 redundant places. [2021-12-22 13:23:45,567 INFO L242 Difference]: Finished difference. Result has 210 places, 203 transitions, 2651 flow [2021-12-22 13:23:45,568 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2651, PETRI_PLACES=210, PETRI_TRANSITIONS=203} [2021-12-22 13:23:45,569 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 140 predicate places. [2021-12-22 13:23:45,569 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 203 transitions, 2651 flow [2021-12-22 13:23:45,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:45,569 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:23:45,569 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:23:45,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-22 13:23:45,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:23:45,786 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:23:45,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:23:45,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1986094188, now seen corresponding path program 4 times [2021-12-22 13:23:45,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:23:45,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760818309] [2021-12-22 13:23:45,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:23:45,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:23:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:23:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:23:45,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:23:45,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760818309] [2021-12-22 13:23:45,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760818309] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:23:45,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239417885] [2021-12-22 13:23:45,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 13:23:45,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:23:45,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:23:45,912 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) [2021-12-22 13:23:45,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 13:23:45,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 13:23:45,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:23:45,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-22 13:23:45,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:23:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:23:46,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:23:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:23:46,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239417885] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:23:46,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:23:46,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2021-12-22 13:23:46,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282390479] [2021-12-22 13:23:46,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:23:46,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-22 13:23:46,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:23:46,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-22 13:23:46,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2021-12-22 13:23:46,361 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-22 13:23:46,362 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 203 transitions, 2651 flow. Second operand has 26 states, 26 states have (on average 56.30769230769231) internal successors, (1464), 26 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:46,362 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:23:46,362 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-22 13:23:46,362 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:23:47,481 INFO L129 PetriNetUnfolder]: 264/1583 cut-off events. [2021-12-22 13:23:47,481 INFO L130 PetriNetUnfolder]: For 83404/83722 co-relation queries the response was YES. [2021-12-22 13:23:47,492 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9726 conditions, 1583 events. 264/1583 cut-off events. For 83404/83722 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 10973 event pairs, 1 based on Foata normal form. 57/1480 useless extension candidates. Maximal degree in co-relation 9623. Up to 330 conditions per place. [2021-12-22 13:23:47,502 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 71 selfloop transitions, 222 changer transitions 38/376 dead transitions. [2021-12-22 13:23:47,502 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 376 transitions, 10583 flow [2021-12-22 13:23:47,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-22 13:23:47,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-12-22 13:23:47,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3011 transitions. [2021-12-22 13:23:47,505 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8271978021978021 [2021-12-22 13:23:47,505 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3011 transitions. [2021-12-22 13:23:47,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3011 transitions. [2021-12-22 13:23:47,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:23:47,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3011 transitions. [2021-12-22 13:23:47,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 57.90384615384615) internal successors, (3011), 52 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:47,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 70.0) internal successors, (3710), 53 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:47,513 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 70.0) internal successors, (3710), 53 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:47,514 INFO L186 Difference]: Start difference. First operand has 210 places, 203 transitions, 2651 flow. Second operand 52 states and 3011 transitions. [2021-12-22 13:23:47,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 376 transitions, 10583 flow [2021-12-22 13:23:47,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 376 transitions, 8479 flow, removed 1021 selfloop flow, removed 21 redundant places. [2021-12-22 13:23:47,579 INFO L242 Difference]: Finished difference. Result has 263 places, 313 transitions, 5525 flow [2021-12-22 13:23:47,579 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2159, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=5525, PETRI_PLACES=263, PETRI_TRANSITIONS=313} [2021-12-22 13:23:47,580 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 193 predicate places. [2021-12-22 13:23:47,580 INFO L470 AbstractCegarLoop]: Abstraction has has 263 places, 313 transitions, 5525 flow [2021-12-22 13:23:47,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.30769230769231) internal successors, (1464), 26 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:47,580 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:23:47,581 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:23:47,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-22 13:23:47,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 13:23:47,796 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:23:47,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:23:47,796 INFO L85 PathProgramCache]: Analyzing trace with hash -285761002, now seen corresponding path program 5 times [2021-12-22 13:23:47,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:23:47,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899934769] [2021-12-22 13:23:47,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:23:47,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:23:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:23:48,104 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:23:48,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:23:48,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899934769] [2021-12-22 13:23:48,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899934769] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:23:48,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698558320] [2021-12-22 13:23:48,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 13:23:48,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:23:48,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:23:48,120 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) [2021-12-22 13:23:48,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 13:23:48,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-22 13:23:48,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:23:48,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-22 13:23:48,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:23:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:23:48,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:23:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:23:49,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698558320] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:23:49,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:23:49,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 29 [2021-12-22 13:23:49,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294532390] [2021-12-22 13:23:49,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:23:49,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-22 13:23:49,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:23:49,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-22 13:23:49,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-12-22 13:23:49,232 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-22 13:23:49,233 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 313 transitions, 5525 flow. Second operand has 29 states, 29 states have (on average 56.37931034482759) internal successors, (1635), 29 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:49,247 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:23:49,247 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-22 13:23:49,247 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:23:50,101 INFO L129 PetriNetUnfolder]: 274/1803 cut-off events. [2021-12-22 13:23:50,102 INFO L130 PetriNetUnfolder]: For 125520/125685 co-relation queries the response was YES. [2021-12-22 13:23:50,117 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11240 conditions, 1803 events. 274/1803 cut-off events. For 125520/125685 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 12412 event pairs, 0 based on Foata normal form. 28/1637 useless extension candidates. Maximal degree in co-relation 11114. Up to 372 conditions per place. [2021-12-22 13:23:50,130 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 271 selfloop transitions, 47 changer transitions 26/389 dead transitions. [2021-12-22 13:23:50,130 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 389 transitions, 10759 flow [2021-12-22 13:23:50,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-22 13:23:50,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-22 13:23:50,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2134 transitions. [2021-12-22 13:23:50,133 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8239382239382239 [2021-12-22 13:23:50,133 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2134 transitions. [2021-12-22 13:23:50,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2134 transitions. [2021-12-22 13:23:50,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:23:50,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2134 transitions. [2021-12-22 13:23:50,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 57.67567567567568) internal successors, (2134), 37 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:50,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:50,139 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:50,140 INFO L186 Difference]: Start difference. First operand has 263 places, 313 transitions, 5525 flow. Second operand 37 states and 2134 transitions. [2021-12-22 13:23:50,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 389 transitions, 10759 flow [2021-12-22 13:23:50,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 389 transitions, 7120 flow, removed 1795 selfloop flow, removed 20 redundant places. [2021-12-22 13:23:50,310 INFO L242 Difference]: Finished difference. Result has 285 places, 331 transitions, 4313 flow [2021-12-22 13:23:50,311 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3666, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4313, PETRI_PLACES=285, PETRI_TRANSITIONS=331} [2021-12-22 13:23:50,311 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 215 predicate places. [2021-12-22 13:23:50,312 INFO L470 AbstractCegarLoop]: Abstraction has has 285 places, 331 transitions, 4313 flow [2021-12-22 13:23:50,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 56.37931034482759) internal successors, (1635), 29 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:50,312 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:23:50,312 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:23:50,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 13:23:50,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:23:50,536 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:23:50,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:23:50,536 INFO L85 PathProgramCache]: Analyzing trace with hash -983699664, now seen corresponding path program 6 times [2021-12-22 13:23:50,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:23:50,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535671721] [2021-12-22 13:23:50,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:23:50,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:23:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:23:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:23:50,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:23:50,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535671721] [2021-12-22 13:23:50,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535671721] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:23:50,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641339562] [2021-12-22 13:23:50,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 13:23:50,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:23:50,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:23:50,835 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) [2021-12-22 13:23:50,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 13:23:50,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-22 13:23:50,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:23:50,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-22 13:23:50,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:23:51,272 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:23:51,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:23:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:23:51,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641339562] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:23:51,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:23:51,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 31 [2021-12-22 13:23:51,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669641226] [2021-12-22 13:23:51,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:23:51,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-22 13:23:51,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:23:51,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-22 13:23:51,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2021-12-22 13:23:51,802 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-22 13:23:51,808 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 331 transitions, 4313 flow. Second operand has 31 states, 31 states have (on average 56.38709677419355) internal successors, (1748), 31 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:51,809 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:23:51,809 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-22 13:23:51,809 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:23:52,788 INFO L129 PetriNetUnfolder]: 332/2277 cut-off events. [2021-12-22 13:23:52,788 INFO L130 PetriNetUnfolder]: For 122119/122479 co-relation queries the response was YES. [2021-12-22 13:23:52,805 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11510 conditions, 2277 events. 332/2277 cut-off events. For 122119/122479 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 16998 event pairs, 0 based on Foata normal form. 42/2077 useless extension candidates. Maximal degree in co-relation 11378. Up to 340 conditions per place. [2021-12-22 13:23:52,819 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 235 selfloop transitions, 169 changer transitions 26/475 dead transitions. [2021-12-22 13:23:52,819 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 475 transitions, 9585 flow [2021-12-22 13:23:52,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-22 13:23:52,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-12-22 13:23:52,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2593 transitions. [2021-12-22 13:23:52,823 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8231746031746032 [2021-12-22 13:23:52,823 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2593 transitions. [2021-12-22 13:23:52,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2593 transitions. [2021-12-22 13:23:52,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:23:52,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2593 transitions. [2021-12-22 13:23:52,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 57.62222222222222) internal successors, (2593), 45 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:52,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 70.0) internal successors, (3220), 46 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:52,831 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 70.0) internal successors, (3220), 46 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:52,831 INFO L186 Difference]: Start difference. First operand has 285 places, 331 transitions, 4313 flow. Second operand 45 states and 2593 transitions. [2021-12-22 13:23:52,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 475 transitions, 9585 flow [2021-12-22 13:23:53,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 475 transitions, 8826 flow, removed 354 selfloop flow, removed 23 redundant places. [2021-12-22 13:23:53,014 INFO L242 Difference]: Finished difference. Result has 318 places, 388 transitions, 5550 flow [2021-12-22 13:23:53,015 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3906, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=5550, PETRI_PLACES=318, PETRI_TRANSITIONS=388} [2021-12-22 13:23:53,016 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 248 predicate places. [2021-12-22 13:23:53,016 INFO L470 AbstractCegarLoop]: Abstraction has has 318 places, 388 transitions, 5550 flow [2021-12-22 13:23:53,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 56.38709677419355) internal successors, (1748), 31 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:53,016 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:23:53,016 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:23:53,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 13:23:53,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:23:53,231 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:23:53,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:23:53,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1731536892, now seen corresponding path program 7 times [2021-12-22 13:23:53,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:23:53,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472805807] [2021-12-22 13:23:53,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:23:53,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:23:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:23:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:23:53,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:23:53,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472805807] [2021-12-22 13:23:53,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472805807] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:23:53,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908843548] [2021-12-22 13:23:53,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 13:23:53,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:23:53,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:23:53,455 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) [2021-12-22 13:23:53,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 13:23:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:23:53,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-22 13:23:53,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:23:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:23:53,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:23:54,435 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:23:54,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908843548] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:23:54,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:23:54,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 35 [2021-12-22 13:23:54,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896009404] [2021-12-22 13:23:54,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:23:54,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-22 13:23:54,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:23:54,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-22 13:23:54,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2021-12-22 13:23:54,438 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-22 13:23:54,439 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 388 transitions, 5550 flow. Second operand has 35 states, 35 states have (on average 56.371428571428574) internal successors, (1973), 35 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:54,439 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:23:54,439 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-22 13:23:54,439 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:23:55,752 INFO L129 PetriNetUnfolder]: 397/2805 cut-off events. [2021-12-22 13:23:55,753 INFO L130 PetriNetUnfolder]: For 184595/184879 co-relation queries the response was YES. [2021-12-22 13:23:55,778 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15173 conditions, 2805 events. 397/2805 cut-off events. For 184595/184879 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 22325 event pairs, 0 based on Foata normal form. 51/2560 useless extension candidates. Maximal degree in co-relation 15027. Up to 416 conditions per place. [2021-12-22 13:23:55,796 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 122 selfloop transitions, 348 changer transitions 26/541 dead transitions. [2021-12-22 13:23:55,797 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 541 transitions, 12338 flow [2021-12-22 13:23:55,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-22 13:23:55,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-12-22 13:23:55,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2942 transitions. [2021-12-22 13:23:55,814 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8240896358543417 [2021-12-22 13:23:55,815 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2942 transitions. [2021-12-22 13:23:55,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2942 transitions. [2021-12-22 13:23:55,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:23:55,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2942 transitions. [2021-12-22 13:23:55,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 57.68627450980392) internal successors, (2942), 51 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:55,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 70.0) internal successors, (3640), 52 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:55,823 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 70.0) internal successors, (3640), 52 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:55,824 INFO L186 Difference]: Start difference. First operand has 318 places, 388 transitions, 5550 flow. Second operand 51 states and 2942 transitions. [2021-12-22 13:23:55,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 541 transitions, 12338 flow [2021-12-22 13:23:56,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 541 transitions, 11012 flow, removed 576 selfloop flow, removed 31 redundant places. [2021-12-22 13:23:56,307 INFO L242 Difference]: Finished difference. Result has 352 places, 458 transitions, 7401 flow [2021-12-22 13:23:56,307 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=4894, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=7401, PETRI_PLACES=352, PETRI_TRANSITIONS=458} [2021-12-22 13:23:56,308 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 282 predicate places. [2021-12-22 13:23:56,308 INFO L470 AbstractCegarLoop]: Abstraction has has 352 places, 458 transitions, 7401 flow [2021-12-22 13:23:56,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 56.371428571428574) internal successors, (1973), 35 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:56,308 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:23:56,309 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:23:56,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-22 13:23:56,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 13:23:56,527 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:23:56,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:23:56,527 INFO L85 PathProgramCache]: Analyzing trace with hash -693522108, now seen corresponding path program 8 times [2021-12-22 13:23:56,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:23:56,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163408550] [2021-12-22 13:23:56,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:23:56,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:23:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:23:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:23:56,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:23:56,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163408550] [2021-12-22 13:23:56,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163408550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:23:56,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079453528] [2021-12-22 13:23:56,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:23:56,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:23:56,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:23:56,772 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) [2021-12-22 13:23:56,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 13:23:56,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:23:56,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:23:56,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-22 13:23:56,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:23:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:23:57,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:23:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:23:57,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079453528] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:23:57,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:23:57,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 34 [2021-12-22 13:23:57,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826764634] [2021-12-22 13:23:57,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:23:57,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-22 13:23:57,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:23:57,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-22 13:23:57,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-12-22 13:23:57,528 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-22 13:23:57,529 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 458 transitions, 7401 flow. Second operand has 34 states, 34 states have (on average 56.35294117647059) internal successors, (1916), 34 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:57,529 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:23:57,529 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-22 13:23:57,529 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:23:59,122 INFO L129 PetriNetUnfolder]: 494/3392 cut-off events. [2021-12-22 13:23:59,122 INFO L130 PetriNetUnfolder]: For 296375/296794 co-relation queries the response was YES. [2021-12-22 13:23:59,153 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20583 conditions, 3392 events. 494/3392 cut-off events. For 296375/296794 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 27950 event pairs, 0 based on Foata normal form. 65/3099 useless extension candidates. Maximal degree in co-relation 20421. Up to 510 conditions per place. [2021-12-22 13:23:59,173 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 125 selfloop transitions, 443 changer transitions 26/639 dead transitions. [2021-12-22 13:23:59,174 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 639 transitions, 15782 flow [2021-12-22 13:23:59,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-22 13:23:59,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-12-22 13:23:59,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3356 transitions. [2021-12-22 13:23:59,177 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8266009852216749 [2021-12-22 13:23:59,177 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3356 transitions. [2021-12-22 13:23:59,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3356 transitions. [2021-12-22 13:23:59,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:23:59,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3356 transitions. [2021-12-22 13:23:59,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 57.86206896551724) internal successors, (3356), 58 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:59,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 70.0) internal successors, (4130), 59 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:59,186 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 70.0) internal successors, (4130), 59 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:59,186 INFO L186 Difference]: Start difference. First operand has 352 places, 458 transitions, 7401 flow. Second operand 58 states and 3356 transitions. [2021-12-22 13:23:59,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 639 transitions, 15782 flow [2021-12-22 13:23:59,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 639 transitions, 13590 flow, removed 1047 selfloop flow, removed 22 redundant places. [2021-12-22 13:23:59,499 INFO L242 Difference]: Finished difference. Result has 403 places, 538 transitions, 9409 flow [2021-12-22 13:23:59,500 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=6485, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=9409, PETRI_PLACES=403, PETRI_TRANSITIONS=538} [2021-12-22 13:23:59,500 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 333 predicate places. [2021-12-22 13:23:59,500 INFO L470 AbstractCegarLoop]: Abstraction has has 403 places, 538 transitions, 9409 flow [2021-12-22 13:23:59,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 56.35294117647059) internal successors, (1916), 34 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:23:59,501 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:23:59,501 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:23:59,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-22 13:23:59,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 13:23:59,779 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:23:59,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:23:59,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1774382462, now seen corresponding path program 9 times [2021-12-22 13:23:59,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:23:59,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406190929] [2021-12-22 13:23:59,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:23:59,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:23:59,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:24:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:24:00,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:24:00,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406190929] [2021-12-22 13:24:00,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406190929] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:24:00,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140216136] [2021-12-22 13:24:00,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:24:00,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:24:00,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:24:00,032 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) [2021-12-22 13:24:00,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 13:24:00,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-22 13:24:00,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:24:00,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 13:24:00,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:24:00,376 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:24:00,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:24:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:24:00,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140216136] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:24:00,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:24:00,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 27 [2021-12-22 13:24:00,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377859787] [2021-12-22 13:24:00,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:24:00,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-22 13:24:00,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:24:00,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-22 13:24:00,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2021-12-22 13:24:00,684 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-22 13:24:00,685 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 538 transitions, 9409 flow. Second operand has 27 states, 27 states have (on average 56.370370370370374) internal successors, (1522), 27 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:24:00,685 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:24:00,685 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-22 13:24:00,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:24:02,262 INFO L129 PetriNetUnfolder]: 518/3513 cut-off events. [2021-12-22 13:24:02,262 INFO L130 PetriNetUnfolder]: For 363973/364322 co-relation queries the response was YES. [2021-12-22 13:24:02,298 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23062 conditions, 3513 events. 518/3513 cut-off events. For 363973/364322 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 29048 event pairs, 1 based on Foata normal form. 73/3217 useless extension candidates. Maximal degree in co-relation 22883. Up to 544 conditions per place. [2021-12-22 13:24:02,319 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 104 selfloop transitions, 455 changer transitions 14/618 dead transitions. [2021-12-22 13:24:02,319 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 618 transitions, 15889 flow [2021-12-22 13:24:02,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-22 13:24:02,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-12-22 13:24:02,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2887 transitions. [2021-12-22 13:24:02,321 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8248571428571428 [2021-12-22 13:24:02,322 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2887 transitions. [2021-12-22 13:24:02,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2887 transitions. [2021-12-22 13:24:02,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:24:02,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2887 transitions. [2021-12-22 13:24:02,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 57.74) internal successors, (2887), 50 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:24:02,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:24:02,328 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:24:02,328 INFO L186 Difference]: Start difference. First operand has 403 places, 538 transitions, 9409 flow. Second operand 50 states and 2887 transitions. [2021-12-22 13:24:02,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 618 transitions, 15889 flow [2021-12-22 13:24:02,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 618 transitions, 13835 flow, removed 776 selfloop flow, removed 38 redundant places. [2021-12-22 13:24:02,818 INFO L242 Difference]: Finished difference. Result has 418 places, 561 transitions, 10008 flow [2021-12-22 13:24:02,819 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=7963, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=433, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=10008, PETRI_PLACES=418, PETRI_TRANSITIONS=561} [2021-12-22 13:24:02,819 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 348 predicate places. [2021-12-22 13:24:02,819 INFO L470 AbstractCegarLoop]: Abstraction has has 418 places, 561 transitions, 10008 flow [2021-12-22 13:24:02,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 56.370370370370374) internal successors, (1522), 27 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:24:02,820 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:24:02,820 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:24:02,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 13:24:03,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-22 13:24:03,035 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:24:03,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:24:03,035 INFO L85 PathProgramCache]: Analyzing trace with hash -341929228, now seen corresponding path program 10 times [2021-12-22 13:24:03,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:24:03,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128428654] [2021-12-22 13:24:03,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:24:03,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:24:03,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:24:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:24:03,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:24:03,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128428654] [2021-12-22 13:24:03,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128428654] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:24:03,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83315348] [2021-12-22 13:24:03,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 13:24:03,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:24:03,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:24:03,245 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) [2021-12-22 13:24:03,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 13:24:03,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 13:24:03,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:24:03,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-22 13:24:03,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:24:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:24:03,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:24:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:24:03,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83315348] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:24:03,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:24:03,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 30 [2021-12-22 13:24:03,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631237964] [2021-12-22 13:24:03,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:24:03,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-22 13:24:03,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:24:03,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-22 13:24:03,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2021-12-22 13:24:03,832 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-22 13:24:03,833 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 561 transitions, 10008 flow. Second operand has 30 states, 30 states have (on average 56.333333333333336) internal successors, (1690), 30 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:24:03,833 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:24:03,833 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-22 13:24:03,833 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:24:05,653 INFO L129 PetriNetUnfolder]: 513/3563 cut-off events. [2021-12-22 13:24:05,653 INFO L130 PetriNetUnfolder]: For 392835/393119 co-relation queries the response was YES. [2021-12-22 13:24:05,699 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23441 conditions, 3563 events. 513/3563 cut-off events. For 392835/393119 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 29666 event pairs, 0 based on Foata normal form. 89/3278 useless extension candidates. Maximal degree in co-relation 23259. Up to 540 conditions per place. [2021-12-22 13:24:05,815 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 115 selfloop transitions, 484 changer transitions 31/675 dead transitions. [2021-12-22 13:24:05,815 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 675 transitions, 17970 flow [2021-12-22 13:24:05,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-22 13:24:05,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-12-22 13:24:05,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3405 transitions. [2021-12-22 13:24:05,821 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8244552058111381 [2021-12-22 13:24:05,821 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3405 transitions. [2021-12-22 13:24:05,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3405 transitions. [2021-12-22 13:24:05,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:24:05,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3405 transitions. [2021-12-22 13:24:05,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 57.71186440677966) internal successors, (3405), 59 states have internal predecessors, (3405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:24:05,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 70.0) internal successors, (4200), 60 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:24:05,829 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 70.0) internal successors, (4200), 60 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:24:05,829 INFO L186 Difference]: Start difference. First operand has 418 places, 561 transitions, 10008 flow. Second operand 59 states and 3405 transitions. [2021-12-22 13:24:05,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 675 transitions, 17970 flow [2021-12-22 13:24:06,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 675 transitions, 16525 flow, removed 558 selfloop flow, removed 24 redundant places. [2021-12-22 13:24:06,349 INFO L242 Difference]: Finished difference. Result has 464 places, 574 transitions, 11051 flow [2021-12-22 13:24:06,350 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=9037, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=472, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=11051, PETRI_PLACES=464, PETRI_TRANSITIONS=574} [2021-12-22 13:24:06,350 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 394 predicate places. [2021-12-22 13:24:06,351 INFO L470 AbstractCegarLoop]: Abstraction has has 464 places, 574 transitions, 11051 flow [2021-12-22 13:24:06,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 56.333333333333336) internal successors, (1690), 30 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:24:06,351 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:24:06,351 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:24:06,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 13:24:06,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-22 13:24:06,567 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:24:06,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:24:06,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1673947068, now seen corresponding path program 11 times [2021-12-22 13:24:06,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:24:06,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054215194] [2021-12-22 13:24:06,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:24:06,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:24:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:24:06,823 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 368 proven. 53 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 13:24:06,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:24:06,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054215194] [2021-12-22 13:24:06,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054215194] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:24:06,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064184886] [2021-12-22 13:24:06,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 13:24:06,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:24:06,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:24:06,840 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) [2021-12-22 13:24:06,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 13:24:06,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-22 13:24:06,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:24:06,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 13:24:06,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:24:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 421 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 13:24:07,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:24:07,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064184886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:24:07,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:24:07,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2021-12-22 13:24:07,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779554285] [2021-12-22 13:24:07,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:24:07,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-22 13:24:07,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:24:07,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-22 13:24:07,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-12-22 13:24:07,168 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2021-12-22 13:24:07,168 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 574 transitions, 11051 flow. Second operand has 23 states, 23 states have (on average 59.91304347826087) internal successors, (1378), 23 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:24:07,168 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:24:07,168 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2021-12-22 13:24:07,169 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:24:12,159 INFO L129 PetriNetUnfolder]: 2729/14107 cut-off events. [2021-12-22 13:24:12,160 INFO L130 PetriNetUnfolder]: For 1261836/1262063 co-relation queries the response was YES. [2021-12-22 13:24:12,340 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83067 conditions, 14107 events. 2729/14107 cut-off events. For 1261836/1262063 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 167496 event pairs, 648 based on Foata normal form. 79/12622 useless extension candidates. Maximal degree in co-relation 82906. Up to 1994 conditions per place. [2021-12-22 13:24:12,351 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 0 selfloop transitions, 0 changer transitions 614/614 dead transitions. [2021-12-22 13:24:12,352 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 614 transitions, 9999 flow [2021-12-22 13:24:12,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-22 13:24:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-22 13:24:12,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2000 transitions. [2021-12-22 13:24:12,354 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8658008658008658 [2021-12-22 13:24:12,354 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2000 transitions. [2021-12-22 13:24:12,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2000 transitions. [2021-12-22 13:24:12,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:24:12,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2000 transitions. [2021-12-22 13:24:12,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 60.60606060606061) internal successors, (2000), 33 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) [2021-12-22 13:24:12,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:24:12,358 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:24:12,358 INFO L186 Difference]: Start difference. First operand has 464 places, 574 transitions, 11051 flow. Second operand 33 states and 2000 transitions. [2021-12-22 13:24:12,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 614 transitions, 9999 flow [2021-12-22 13:24:13,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 614 transitions, 8386 flow, removed 197 selfloop flow, removed 73 redundant places. [2021-12-22 13:24:13,219 INFO L242 Difference]: Finished difference. Result has 407 places, 0 transitions, 0 flow [2021-12-22 13:24:13,219 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=8000, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=0, PETRI_PLACES=407, PETRI_TRANSITIONS=0} [2021-12-22 13:24:13,220 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 337 predicate places. [2021-12-22 13:24:13,220 INFO L470 AbstractCegarLoop]: Abstraction has has 407 places, 0 transitions, 0 flow [2021-12-22 13:24:13,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.91304347826087) internal successors, (1378), 23 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:24:13,222 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-12-22 13:24:13,222 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2021-12-22 13:24:13,223 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2021-12-22 13:24:13,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 13:24:13,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 13:24:13,443 INFO L732 BasicCegarLoop]: Path program histogram: [11, 2, 2, 1, 1, 1] [2021-12-22 13:24:13,445 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-22 13:24:13,445 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 13:24:13,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 01:24:13 BasicIcfg [2021-12-22 13:24:13,447 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 13:24:13,448 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 13:24:13,448 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 13:24:13,448 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 13:24:13,448 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:23:39" (3/4) ... [2021-12-22 13:24:13,450 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-22 13:24:13,454 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2021-12-22 13:24:13,454 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2021-12-22 13:24:13,456 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-12-22 13:24:13,457 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-22 13:24:13,457 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-22 13:24:13,457 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-22 13:24:13,473 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-22 13:24:13,473 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 13:24:13,474 INFO L158 Benchmark]: Toolchain (without parser) took 35302.38ms. Allocated memory was 155.2MB in the beginning and 6.1GB in the end (delta: 6.0GB). Free memory was 122.4MB in the beginning and 5.0GB in the end (delta: -4.9GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2021-12-22 13:24:13,474 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 77.6MB. Free memory is still 35.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 13:24:13,474 INFO L158 Benchmark]: CACSL2BoogieTranslator took 560.02ms. Allocated memory is still 155.2MB. Free memory was 122.4MB in the beginning and 121.6MB in the end (delta: 795.0kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-22 13:24:13,474 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.43ms. Allocated memory is still 155.2MB. Free memory was 121.6MB in the beginning and 119.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 13:24:13,474 INFO L158 Benchmark]: Boogie Preprocessor took 37.46ms. Allocated memory is still 155.2MB. Free memory was 119.5MB in the beginning and 118.6MB in the end (delta: 943.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 13:24:13,475 INFO L158 Benchmark]: RCFGBuilder took 379.35ms. Allocated memory is still 155.2MB. Free memory was 118.6MB in the beginning and 106.6MB in the end (delta: 12.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 13:24:13,475 INFO L158 Benchmark]: TraceAbstraction took 34252.43ms. Allocated memory was 155.2MB in the beginning and 6.1GB in the end (delta: 6.0GB). Free memory was 106.0MB in the beginning and 5.0GB in the end (delta: -4.9GB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. [2021-12-22 13:24:13,475 INFO L158 Benchmark]: Witness Printer took 25.78ms. Allocated memory is still 6.1GB. Free memory was 5.0GB in the beginning and 5.0GB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-22 13:24:13,476 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 77.6MB. Free memory is still 35.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 560.02ms. Allocated memory is still 155.2MB. Free memory was 122.4MB in the beginning and 121.6MB in the end (delta: 795.0kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.43ms. Allocated memory is still 155.2MB. Free memory was 121.6MB in the beginning and 119.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.46ms. Allocated memory is still 155.2MB. Free memory was 119.5MB in the beginning and 118.6MB in the end (delta: 943.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 379.35ms. Allocated memory is still 155.2MB. Free memory was 118.6MB in the beginning and 106.6MB in the end (delta: 12.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 34252.43ms. Allocated memory was 155.2MB in the beginning and 6.1GB in the end (delta: 6.0GB). Free memory was 106.0MB in the beginning and 5.0GB in the end (delta: -4.9GB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. * Witness Printer took 25.78ms. Allocated memory is still 6.1GB. Free memory was 5.0GB in the beginning and 5.0GB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 34.1s, OverallIterations: 18, TraceHistogramMax: 11, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 20.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1063 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1063 mSDsluCounter, 312 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 489 mSDsCounter, 1624 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2890 IncrementalHoareTripleChecker+Invalid, 4514 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1624 mSolverCounterUnsat, 87 mSDtfsCounter, 2890 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2934 GetRequests, 2184 SyntacticMatches, 2 SemanticMatches, 748 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11982 ImplicationChecksByTransitivity, 7.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11051occurred in iteration=17, InterpolantAutomatonStates: 558, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 9.0s InterpolantComputationTime, 2640 NumberOfCodeBlocks, 2635 NumberOfCodeBlocksAsserted, 74 NumberOfCheckSat, 3662 ConstructedInterpolants, 0 QuantifiedInterpolants, 14332 SizeOfPredicates, 163 NumberOfNonLiveVariables, 2624 ConjunctsInSsa, 220 ConjunctsInUnsatCore, 41 InterpolantComputations, 7 PerfectInterpolantSequences, 941/7204 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-22 13:24:13,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE