./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/weaver/chl-word-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 22:48:06,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 22:48:06,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 22:48:06,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 22:48:06,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 22:48:06,103 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 22:48:06,105 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 22:48:06,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 22:48:06,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 22:48:06,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 22:48:06,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 22:48:06,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 22:48:06,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 22:48:06,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 22:48:06,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 22:48:06,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 22:48:06,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 22:48:06,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 22:48:06,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 22:48:06,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 22:48:06,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 22:48:06,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 22:48:06,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 22:48:06,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 22:48:06,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 22:48:06,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 22:48:06,146 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 22:48:06,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 22:48:06,148 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 22:48:06,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 22:48:06,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 22:48:06,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 22:48:06,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 22:48:06,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 22:48:06,153 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 22:48:06,154 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 22:48:06,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 22:48:06,154 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 22:48:06,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 22:48:06,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 22:48:06,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 22:48:06,157 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 22:48:06,182 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 22:48:06,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 22:48:06,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 22:48:06,183 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 22:48:06,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 22:48:06,184 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 22:48:06,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 22:48:06,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 22:48:06,185 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 22:48:06,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 22:48:06,186 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 22:48:06,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 22:48:06,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 22:48:06,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 22:48:06,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 22:48:06,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 22:48:06,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 22:48:06,188 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 22:48:06,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 22:48:06,188 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 22:48:06,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 22:48:06,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 22:48:06,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 22:48:06,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 22:48:06,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:48:06,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 22:48:06,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 22:48:06,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 22:48:06,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 22:48:06,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 22:48:06,191 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 22:48:06,191 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 22:48:06,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 22:48:06,192 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 22:48:06,192 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2021-12-17 22:48:06,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 22:48:06,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 22:48:06,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 22:48:06,417 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 22:48:06,418 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 22:48:06,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2021-12-17 22:48:06,486 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a69ba1914/1844a41f9ad444438220af72137bed77/FLAG563236c25 [2021-12-17 22:48:06,855 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 22:48:06,856 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2021-12-17 22:48:06,865 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a69ba1914/1844a41f9ad444438220af72137bed77/FLAG563236c25 [2021-12-17 22:48:07,271 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a69ba1914/1844a41f9ad444438220af72137bed77 [2021-12-17 22:48:07,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 22:48:07,274 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 22:48:07,277 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 22:48:07,277 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 22:48:07,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 22:48:07,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:48:07" (1/1) ... [2021-12-17 22:48:07,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aa292f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:48:07, skipping insertion in model container [2021-12-17 22:48:07,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:48:07" (1/1) ... [2021-12-17 22:48:07,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 22:48:07,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 22:48:07,459 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/weaver/chl-word-symm.wvr.c[2848,2861] [2021-12-17 22:48:07,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:48:07,476 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 22:48:07,511 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/weaver/chl-word-symm.wvr.c[2848,2861] [2021-12-17 22:48:07,514 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:48:07,532 INFO L208 MainTranslator]: Completed translation [2021-12-17 22:48:07,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:48:07 WrapperNode [2021-12-17 22:48:07,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 22:48:07,534 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 22:48:07,534 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 22:48:07,534 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 22:48:07,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:48:07" (1/1) ... [2021-12-17 22:48:07,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:48:07" (1/1) ... [2021-12-17 22:48:07,583 INFO L137 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 128 [2021-12-17 22:48:07,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 22:48:07,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 22:48:07,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 22:48:07,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 22:48:07,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:48:07" (1/1) ... [2021-12-17 22:48:07,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:48:07" (1/1) ... [2021-12-17 22:48:07,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:48:07" (1/1) ... [2021-12-17 22:48:07,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:48:07" (1/1) ... [2021-12-17 22:48:07,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:48:07" (1/1) ... [2021-12-17 22:48:07,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:48:07" (1/1) ... [2021-12-17 22:48:07,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:48:07" (1/1) ... [2021-12-17 22:48:07,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 22:48:07,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 22:48:07,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 22:48:07,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 22:48:07,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:48:07" (1/1) ... [2021-12-17 22:48:07,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:48:07,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:48:07,672 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) [2021-12-17 22:48:07,680 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 [2021-12-17 22:48:07,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 22:48:07,706 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-17 22:48:07,707 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-17 22:48:07,707 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-17 22:48:07,707 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-17 22:48:07,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 22:48:07,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 22:48:07,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 22:48:07,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 22:48:07,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 22:48:07,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 22:48:07,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 22:48:07,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 22:48:07,709 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-17 22:48:07,822 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 22:48:07,824 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 22:48:08,101 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 22:48:08,112 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 22:48:08,115 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-17 22:48:08,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:48:08 BoogieIcfgContainer [2021-12-17 22:48:08,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 22:48:08,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 22:48:08,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 22:48:08,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 22:48:08,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 10:48:07" (1/3) ... [2021-12-17 22:48:08,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328a5d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:48:08, skipping insertion in model container [2021-12-17 22:48:08,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:48:07" (2/3) ... [2021-12-17 22:48:08,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328a5d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:48:08, skipping insertion in model container [2021-12-17 22:48:08,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:48:08" (3/3) ... [2021-12-17 22:48:08,126 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2021-12-17 22:48:08,130 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-17 22:48:08,131 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 22:48:08,131 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 22:48:08,131 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-17 22:48:08,185 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,185 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,186 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,186 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,186 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,187 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,187 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,188 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,188 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,188 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,188 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,189 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,189 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,189 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,189 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,190 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,191 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,191 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,191 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,191 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,192 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,192 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,192 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,194 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,194 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,194 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,194 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,194 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,200 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,200 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,201 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,201 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,201 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,201 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,201 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,202 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,202 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,202 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,203 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,203 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,203 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,203 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,203 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,204 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,204 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,204 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,205 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,205 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,205 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,205 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,206 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,206 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,207 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,208 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,208 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,208 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,208 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,209 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,209 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,209 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,210 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,210 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,210 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,210 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,210 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,210 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,211 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,211 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,211 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,211 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,212 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,212 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,212 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,212 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,212 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,213 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,213 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,213 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,213 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,213 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,214 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,215 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,217 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,217 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,217 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,217 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,219 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,219 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,220 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,220 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,220 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,224 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,224 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,225 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,225 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,225 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,225 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,225 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,226 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,226 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,226 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,226 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,226 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,227 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,227 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,227 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,227 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,227 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,228 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,228 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,228 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,228 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,228 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,229 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,229 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,229 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,229 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,229 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,229 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,230 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,230 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,230 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,230 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,230 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,231 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,231 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,231 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,231 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,231 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,232 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,232 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,232 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,232 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,232 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,232 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,233 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,233 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,233 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,233 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,233 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,234 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,234 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,234 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,234 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,234 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,235 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,235 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,235 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,235 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,235 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,235 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,236 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,237 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,237 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,237 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,237 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,237 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,237 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,238 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,238 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,238 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,238 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,238 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,239 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,239 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,239 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,239 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,239 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,240 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,240 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,240 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,240 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,240 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,240 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,241 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,241 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,247 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,248 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,248 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,248 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,248 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,249 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,249 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,249 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,249 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,249 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,249 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,253 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,253 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,254 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,254 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,254 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,254 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,254 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,255 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,255 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,255 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,255 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:48:08,260 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-17 22:48:08,310 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 22:48:08,315 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 [2021-12-17 22:48:08,316 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-17 22:48:08,329 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 228 places, 246 transitions, 508 flow [2021-12-17 22:48:08,404 INFO L129 PetriNetUnfolder]: 25/244 cut-off events. [2021-12-17 22:48:08,404 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-17 22:48:08,411 INFO L84 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 244 events. 25/244 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 312 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 163. Up to 3 conditions per place. [2021-12-17 22:48:08,411 INFO L82 GeneralOperation]: Start removeDead. Operand has 228 places, 246 transitions, 508 flow [2021-12-17 22:48:08,417 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 235 transitions, 482 flow [2021-12-17 22:48:08,473 INFO L129 PetriNetUnfolder]: 25/234 cut-off events. [2021-12-17 22:48:08,473 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-17 22:48:08,473 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:08,475 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:08,476 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:08,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:08,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1238378754, now seen corresponding path program 1 times [2021-12-17 22:48:08,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:08,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14208166] [2021-12-17 22:48:08,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:08,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:08,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:08,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:08,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14208166] [2021-12-17 22:48:08,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14208166] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:08,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:08,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 22:48:08,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593858408] [2021-12-17 22:48:08,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:08,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 22:48:08,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:08,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 22:48:08,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 22:48:08,759 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 246 [2021-12-17 22:48:08,765 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 235 transitions, 482 flow. Second operand has 2 states, 2 states have (on average 232.5) internal successors, (465), 2 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:08,765 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:08,765 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 246 [2021-12-17 22:48:08,766 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:08,839 INFO L129 PetriNetUnfolder]: 14/224 cut-off events. [2021-12-17 22:48:08,840 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-17 22:48:08,842 INFO L84 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 224 events. 14/224 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 291 event pairs, 0 based on Foata normal form. 13/216 useless extension candidates. Maximal degree in co-relation 157. Up to 5 conditions per place. [2021-12-17 22:48:08,845 INFO L132 encePairwiseOnDemand]: 235/246 looper letters, 4 selfloop transitions, 0 changer transitions 7/224 dead transitions. [2021-12-17 22:48:08,845 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 224 transitions, 468 flow [2021-12-17 22:48:08,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 22:48:08,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-17 22:48:08,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 475 transitions. [2021-12-17 22:48:08,858 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9654471544715447 [2021-12-17 22:48:08,858 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 475 transitions. [2021-12-17 22:48:08,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 475 transitions. [2021-12-17 22:48:08,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:08,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 475 transitions. [2021-12-17 22:48:08,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 237.5) internal successors, (475), 2 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) [2021-12-17 22:48:08,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:08,871 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:08,873 INFO L186 Difference]: Start difference. First operand has 217 places, 235 transitions, 482 flow. Second operand 2 states and 475 transitions. [2021-12-17 22:48:08,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 224 transitions, 468 flow [2021-12-17 22:48:08,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 224 transitions, 460 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-17 22:48:08,882 INFO L242 Difference]: Finished difference. Result has 214 places, 217 transitions, 438 flow [2021-12-17 22:48:08,885 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=438, PETRI_PLACES=214, PETRI_TRANSITIONS=217} [2021-12-17 22:48:08,890 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, -3 predicate places. [2021-12-17 22:48:08,890 INFO L470 AbstractCegarLoop]: Abstraction has has 214 places, 217 transitions, 438 flow [2021-12-17 22:48:08,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 232.5) internal successors, (465), 2 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:08,891 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:08,892 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:08,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 22:48:08,892 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:08,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:08,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1845329235, now seen corresponding path program 1 times [2021-12-17 22:48:08,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:08,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950205639] [2021-12-17 22:48:08,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:08,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:09,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:09,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:09,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950205639] [2021-12-17 22:48:09,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950205639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:09,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:09,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 22:48:09,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242352398] [2021-12-17 22:48:09,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:09,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 22:48:09,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:09,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 22:48:09,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 22:48:09,064 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 246 [2021-12-17 22:48:09,065 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 217 transitions, 438 flow. Second operand has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,065 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:09,065 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 246 [2021-12-17 22:48:09,066 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:09,133 INFO L129 PetriNetUnfolder]: 26/304 cut-off events. [2021-12-17 22:48:09,133 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-12-17 22:48:09,135 INFO L84 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 304 events. 26/304 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 685 event pairs, 1 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 333. Up to 14 conditions per place. [2021-12-17 22:48:09,136 INFO L132 encePairwiseOnDemand]: 243/246 looper letters, 10 selfloop transitions, 2 changer transitions 0/221 dead transitions. [2021-12-17 22:48:09,137 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 221 transitions, 473 flow [2021-12-17 22:48:09,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 22:48:09,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-17 22:48:09,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 691 transitions. [2021-12-17 22:48:09,141 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9363143631436315 [2021-12-17 22:48:09,141 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 691 transitions. [2021-12-17 22:48:09,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 691 transitions. [2021-12-17 22:48:09,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:09,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 691 transitions. [2021-12-17 22:48:09,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,147 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,147 INFO L186 Difference]: Start difference. First operand has 214 places, 217 transitions, 438 flow. Second operand 3 states and 691 transitions. [2021-12-17 22:48:09,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 221 transitions, 473 flow [2021-12-17 22:48:09,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 221 transitions, 473 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 22:48:09,157 INFO L242 Difference]: Finished difference. Result has 210 places, 217 transitions, 446 flow [2021-12-17 22:48:09,157 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=446, PETRI_PLACES=210, PETRI_TRANSITIONS=217} [2021-12-17 22:48:09,158 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, -7 predicate places. [2021-12-17 22:48:09,158 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 217 transitions, 446 flow [2021-12-17 22:48:09,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,159 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:09,159 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:09,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 22:48:09,160 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:09,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:09,160 INFO L85 PathProgramCache]: Analyzing trace with hash -523798231, now seen corresponding path program 1 times [2021-12-17 22:48:09,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:09,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541220426] [2021-12-17 22:48:09,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:09,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:09,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:09,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:09,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541220426] [2021-12-17 22:48:09,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541220426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:09,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:09,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 22:48:09,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999539512] [2021-12-17 22:48:09,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:09,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 22:48:09,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:09,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 22:48:09,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 22:48:09,262 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2021-12-17 22:48:09,263 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 217 transitions, 446 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,264 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:09,264 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2021-12-17 22:48:09,264 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:09,341 INFO L129 PetriNetUnfolder]: 53/486 cut-off events. [2021-12-17 22:48:09,342 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2021-12-17 22:48:09,343 INFO L84 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 486 events. 53/486 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1855 event pairs, 17 based on Foata normal form. 0/440 useless extension candidates. Maximal degree in co-relation 579. Up to 57 conditions per place. [2021-12-17 22:48:09,345 INFO L132 encePairwiseOnDemand]: 242/246 looper letters, 19 selfloop transitions, 2 changer transitions 0/222 dead transitions. [2021-12-17 22:48:09,345 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 222 transitions, 501 flow [2021-12-17 22:48:09,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 22:48:09,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-17 22:48:09,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2021-12-17 22:48:09,349 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9173441734417345 [2021-12-17 22:48:09,349 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2021-12-17 22:48:09,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2021-12-17 22:48:09,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:09,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2021-12-17 22:48:09,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,354 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,354 INFO L186 Difference]: Start difference. First operand has 210 places, 217 transitions, 446 flow. Second operand 3 states and 677 transitions. [2021-12-17 22:48:09,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 222 transitions, 501 flow [2021-12-17 22:48:09,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 222 transitions, 497 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-17 22:48:09,359 INFO L242 Difference]: Finished difference. Result has 212 places, 219 transitions, 462 flow [2021-12-17 22:48:09,359 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=462, PETRI_PLACES=212, PETRI_TRANSITIONS=219} [2021-12-17 22:48:09,361 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, -5 predicate places. [2021-12-17 22:48:09,361 INFO L470 AbstractCegarLoop]: Abstraction has has 212 places, 219 transitions, 462 flow [2021-12-17 22:48:09,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,362 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:09,362 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:09,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 22:48:09,363 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:09,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:09,364 INFO L85 PathProgramCache]: Analyzing trace with hash -837697581, now seen corresponding path program 2 times [2021-12-17 22:48:09,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:09,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312493661] [2021-12-17 22:48:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:09,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:09,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:09,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312493661] [2021-12-17 22:48:09,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312493661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:09,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:09,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 22:48:09,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769889715] [2021-12-17 22:48:09,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:09,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 22:48:09,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:09,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 22:48:09,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 22:48:09,471 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2021-12-17 22:48:09,471 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 219 transitions, 462 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:09,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2021-12-17 22:48:09,472 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:09,536 INFO L129 PetriNetUnfolder]: 47/435 cut-off events. [2021-12-17 22:48:09,537 INFO L130 PetriNetUnfolder]: For 41/42 co-relation queries the response was YES. [2021-12-17 22:48:09,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 435 events. 47/435 cut-off events. For 41/42 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1417 event pairs, 14 based on Foata normal form. 4/400 useless extension candidates. Maximal degree in co-relation 521. Up to 45 conditions per place. [2021-12-17 22:48:09,539 INFO L132 encePairwiseOnDemand]: 242/246 looper letters, 21 selfloop transitions, 2 changer transitions 0/224 dead transitions. [2021-12-17 22:48:09,539 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 224 transitions, 525 flow [2021-12-17 22:48:09,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 22:48:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-17 22:48:09,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2021-12-17 22:48:09,542 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9173441734417345 [2021-12-17 22:48:09,542 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2021-12-17 22:48:09,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2021-12-17 22:48:09,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:09,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2021-12-17 22:48:09,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,547 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,547 INFO L186 Difference]: Start difference. First operand has 212 places, 219 transitions, 462 flow. Second operand 3 states and 677 transitions. [2021-12-17 22:48:09,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 224 transitions, 525 flow [2021-12-17 22:48:09,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 224 transitions, 523 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-17 22:48:09,551 INFO L242 Difference]: Finished difference. Result has 215 places, 221 transitions, 484 flow [2021-12-17 22:48:09,552 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=484, PETRI_PLACES=215, PETRI_TRANSITIONS=221} [2021-12-17 22:48:09,553 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, -2 predicate places. [2021-12-17 22:48:09,553 INFO L470 AbstractCegarLoop]: Abstraction has has 215 places, 221 transitions, 484 flow [2021-12-17 22:48:09,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,556 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:09,557 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:09,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 22:48:09,557 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:09,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:09,558 INFO L85 PathProgramCache]: Analyzing trace with hash 345914545, now seen corresponding path program 1 times [2021-12-17 22:48:09,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:09,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897514039] [2021-12-17 22:48:09,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:09,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:09,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:09,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:09,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897514039] [2021-12-17 22:48:09,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897514039] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:09,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:09,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 22:48:09,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743982239] [2021-12-17 22:48:09,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:09,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 22:48:09,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:09,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 22:48:09,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 22:48:09,651 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 246 [2021-12-17 22:48:09,652 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 221 transitions, 484 flow. Second operand has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,652 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:09,652 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 246 [2021-12-17 22:48:09,653 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:09,717 INFO L129 PetriNetUnfolder]: 29/404 cut-off events. [2021-12-17 22:48:09,717 INFO L130 PetriNetUnfolder]: For 30/38 co-relation queries the response was YES. [2021-12-17 22:48:09,719 INFO L84 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 404 events. 29/404 cut-off events. For 30/38 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1292 event pairs, 2 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 467. Up to 26 conditions per place. [2021-12-17 22:48:09,720 INFO L132 encePairwiseOnDemand]: 243/246 looper letters, 9 selfloop transitions, 2 changer transitions 0/224 dead transitions. [2021-12-17 22:48:09,720 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 224 transitions, 514 flow [2021-12-17 22:48:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 22:48:09,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-17 22:48:09,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 690 transitions. [2021-12-17 22:48:09,722 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9349593495934959 [2021-12-17 22:48:09,723 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 690 transitions. [2021-12-17 22:48:09,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 690 transitions. [2021-12-17 22:48:09,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:09,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 690 transitions. [2021-12-17 22:48:09,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,727 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,727 INFO L186 Difference]: Start difference. First operand has 215 places, 221 transitions, 484 flow. Second operand 3 states and 690 transitions. [2021-12-17 22:48:09,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 224 transitions, 514 flow [2021-12-17 22:48:09,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 224 transitions, 508 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-12-17 22:48:09,733 INFO L242 Difference]: Finished difference. Result has 217 places, 221 transitions, 486 flow [2021-12-17 22:48:09,735 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=486, PETRI_PLACES=217, PETRI_TRANSITIONS=221} [2021-12-17 22:48:09,737 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 0 predicate places. [2021-12-17 22:48:09,737 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 221 transitions, 486 flow [2021-12-17 22:48:09,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,738 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:09,739 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:09,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 22:48:09,739 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:09,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:09,740 INFO L85 PathProgramCache]: Analyzing trace with hash -118142017, now seen corresponding path program 1 times [2021-12-17 22:48:09,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:09,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936530283] [2021-12-17 22:48:09,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:09,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:09,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:09,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936530283] [2021-12-17 22:48:09,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936530283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:09,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:09,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 22:48:09,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236746055] [2021-12-17 22:48:09,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:09,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 22:48:09,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:09,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 22:48:09,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 22:48:09,799 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2021-12-17 22:48:09,800 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 221 transitions, 486 flow. Second operand has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:09,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2021-12-17 22:48:09,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:09,884 INFO L129 PetriNetUnfolder]: 41/577 cut-off events. [2021-12-17 22:48:09,885 INFO L130 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2021-12-17 22:48:09,886 INFO L84 FinitePrefix]: Finished finitePrefix Result has 705 conditions, 577 events. 41/577 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2376 event pairs, 8 based on Foata normal form. 0/538 useless extension candidates. Maximal degree in co-relation 697. Up to 23 conditions per place. [2021-12-17 22:48:09,888 INFO L132 encePairwiseOnDemand]: 240/246 looper letters, 26 selfloop transitions, 4 changer transitions 0/231 dead transitions. [2021-12-17 22:48:09,888 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 231 transitions, 576 flow [2021-12-17 22:48:09,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 22:48:09,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-17 22:48:09,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 902 transitions. [2021-12-17 22:48:09,891 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9166666666666666 [2021-12-17 22:48:09,891 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 902 transitions. [2021-12-17 22:48:09,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 902 transitions. [2021-12-17 22:48:09,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:09,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 902 transitions. [2021-12-17 22:48:09,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.5) internal successors, (902), 4 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,897 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,897 INFO L186 Difference]: Start difference. First operand has 217 places, 221 transitions, 486 flow. Second operand 4 states and 902 transitions. [2021-12-17 22:48:09,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 231 transitions, 576 flow [2021-12-17 22:48:09,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 231 transitions, 572 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-17 22:48:09,902 INFO L242 Difference]: Finished difference. Result has 220 places, 223 transitions, 508 flow [2021-12-17 22:48:09,902 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=508, PETRI_PLACES=220, PETRI_TRANSITIONS=223} [2021-12-17 22:48:09,903 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 3 predicate places. [2021-12-17 22:48:09,903 INFO L470 AbstractCegarLoop]: Abstraction has has 220 places, 223 transitions, 508 flow [2021-12-17 22:48:09,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,904 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:09,904 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:09,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 22:48:09,905 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:09,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:09,905 INFO L85 PathProgramCache]: Analyzing trace with hash 577100317, now seen corresponding path program 2 times [2021-12-17 22:48:09,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:09,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060608546] [2021-12-17 22:48:09,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:09,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:09,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:09,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:09,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060608546] [2021-12-17 22:48:09,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060608546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:09,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:09,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 22:48:09,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058786256] [2021-12-17 22:48:09,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:09,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 22:48:09,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:09,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 22:48:09,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 22:48:09,956 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2021-12-17 22:48:09,957 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 223 transitions, 508 flow. Second operand has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:09,958 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:09,958 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2021-12-17 22:48:09,958 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:10,042 INFO L129 PetriNetUnfolder]: 38/581 cut-off events. [2021-12-17 22:48:10,042 INFO L130 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2021-12-17 22:48:10,043 INFO L84 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 581 events. 38/581 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2401 event pairs, 8 based on Foata normal form. 3/557 useless extension candidates. Maximal degree in co-relation 713. Up to 23 conditions per place. [2021-12-17 22:48:10,045 INFO L132 encePairwiseOnDemand]: 240/246 looper letters, 28 selfloop transitions, 4 changer transitions 0/233 dead transitions. [2021-12-17 22:48:10,045 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 233 transitions, 606 flow [2021-12-17 22:48:10,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 22:48:10,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-17 22:48:10,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 902 transitions. [2021-12-17 22:48:10,048 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9166666666666666 [2021-12-17 22:48:10,048 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 902 transitions. [2021-12-17 22:48:10,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 902 transitions. [2021-12-17 22:48:10,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:10,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 902 transitions. [2021-12-17 22:48:10,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.5) internal successors, (902), 4 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:10,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:10,053 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:10,053 INFO L186 Difference]: Start difference. First operand has 220 places, 223 transitions, 508 flow. Second operand 4 states and 902 transitions. [2021-12-17 22:48:10,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 233 transitions, 606 flow [2021-12-17 22:48:10,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 233 transitions, 604 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-17 22:48:10,058 INFO L242 Difference]: Finished difference. Result has 224 places, 225 transitions, 536 flow [2021-12-17 22:48:10,058 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=536, PETRI_PLACES=224, PETRI_TRANSITIONS=225} [2021-12-17 22:48:10,059 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 7 predicate places. [2021-12-17 22:48:10,059 INFO L470 AbstractCegarLoop]: Abstraction has has 224 places, 225 transitions, 536 flow [2021-12-17 22:48:10,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:10,060 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:10,060 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:10,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 22:48:10,060 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:10,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:10,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1246874527, now seen corresponding path program 1 times [2021-12-17 22:48:10,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:10,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698670719] [2021-12-17 22:48:10,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:10,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:10,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:10,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698670719] [2021-12-17 22:48:10,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698670719] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:10,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:10,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 22:48:10,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843147070] [2021-12-17 22:48:10,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:10,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 22:48:10,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:10,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 22:48:10,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-17 22:48:10,186 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-17 22:48:10,187 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 225 transitions, 536 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:10,187 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:10,187 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-17 22:48:10,187 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:10,433 INFO L129 PetriNetUnfolder]: 72/669 cut-off events. [2021-12-17 22:48:10,433 INFO L130 PetriNetUnfolder]: For 66/79 co-relation queries the response was YES. [2021-12-17 22:48:10,435 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1000 conditions, 669 events. 72/669 cut-off events. For 66/79 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3275 event pairs, 27 based on Foata normal form. 1/643 useless extension candidates. Maximal degree in co-relation 988. Up to 185 conditions per place. [2021-12-17 22:48:10,437 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 67 selfloop transitions, 3 changer transitions 22/271 dead transitions. [2021-12-17 22:48:10,437 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 271 transitions, 821 flow [2021-12-17 22:48:10,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 22:48:10,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-17 22:48:10,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2446 transitions. [2021-12-17 22:48:10,443 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7648530331457161 [2021-12-17 22:48:10,443 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2446 transitions. [2021-12-17 22:48:10,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2446 transitions. [2021-12-17 22:48:10,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:10,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2446 transitions. [2021-12-17 22:48:10,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 188.15384615384616) internal successors, (2446), 13 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:10,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:10,455 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:10,456 INFO L186 Difference]: Start difference. First operand has 224 places, 225 transitions, 536 flow. Second operand 13 states and 2446 transitions. [2021-12-17 22:48:10,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 271 transitions, 821 flow [2021-12-17 22:48:10,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 271 transitions, 815 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-12-17 22:48:10,461 INFO L242 Difference]: Finished difference. Result has 246 places, 227 transitions, 573 flow [2021-12-17 22:48:10,462 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=573, PETRI_PLACES=246, PETRI_TRANSITIONS=227} [2021-12-17 22:48:10,462 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 29 predicate places. [2021-12-17 22:48:10,462 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 227 transitions, 573 flow [2021-12-17 22:48:10,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:10,463 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:10,463 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:10,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 22:48:10,464 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:10,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:10,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1587805225, now seen corresponding path program 1 times [2021-12-17 22:48:10,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:10,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498849225] [2021-12-17 22:48:10,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:10,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:10,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:10,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498849225] [2021-12-17 22:48:10,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498849225] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:10,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:10,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 22:48:10,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667685212] [2021-12-17 22:48:10,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:10,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 22:48:10,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:10,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 22:48:10,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 22:48:10,595 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-17 22:48:10,596 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 227 transitions, 573 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:10,596 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:10,596 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-17 22:48:10,597 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:10,812 INFO L129 PetriNetUnfolder]: 73/661 cut-off events. [2021-12-17 22:48:10,812 INFO L130 PetriNetUnfolder]: For 223/242 co-relation queries the response was YES. [2021-12-17 22:48:10,815 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 661 events. 73/661 cut-off events. For 223/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3205 event pairs, 31 based on Foata normal form. 1/632 useless extension candidates. Maximal degree in co-relation 1150. Up to 211 conditions per place. [2021-12-17 22:48:10,817 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 53 selfloop transitions, 8 changer transitions 12/252 dead transitions. [2021-12-17 22:48:10,817 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 252 transitions, 850 flow [2021-12-17 22:48:10,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 22:48:10,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-17 22:48:10,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2063 transitions. [2021-12-17 22:48:10,822 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7623798965262379 [2021-12-17 22:48:10,823 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2063 transitions. [2021-12-17 22:48:10,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2063 transitions. [2021-12-17 22:48:10,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:10,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2063 transitions. [2021-12-17 22:48:10,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.54545454545453) internal successors, (2063), 11 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:10,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:10,835 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:10,835 INFO L186 Difference]: Start difference. First operand has 246 places, 227 transitions, 573 flow. Second operand 11 states and 2063 transitions. [2021-12-17 22:48:10,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 252 transitions, 850 flow [2021-12-17 22:48:10,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 252 transitions, 809 flow, removed 20 selfloop flow, removed 7 redundant places. [2021-12-17 22:48:10,845 INFO L242 Difference]: Finished difference. Result has 249 places, 234 transitions, 637 flow [2021-12-17 22:48:10,845 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=637, PETRI_PLACES=249, PETRI_TRANSITIONS=234} [2021-12-17 22:48:10,846 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 32 predicate places. [2021-12-17 22:48:10,846 INFO L470 AbstractCegarLoop]: Abstraction has has 249 places, 234 transitions, 637 flow [2021-12-17 22:48:10,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:10,848 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:10,848 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:10,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 22:48:10,849 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:10,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:10,849 INFO L85 PathProgramCache]: Analyzing trace with hash 358324959, now seen corresponding path program 2 times [2021-12-17 22:48:10,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:10,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820153504] [2021-12-17 22:48:10,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:10,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:10,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:10,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820153504] [2021-12-17 22:48:10,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820153504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:10,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:10,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 22:48:10,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868032599] [2021-12-17 22:48:10,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:10,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 22:48:10,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:10,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 22:48:10,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 22:48:10,992 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-17 22:48:10,994 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 234 transitions, 637 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:10,994 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:10,994 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-17 22:48:10,994 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:11,273 INFO L129 PetriNetUnfolder]: 71/667 cut-off events. [2021-12-17 22:48:11,274 INFO L130 PetriNetUnfolder]: For 302/325 co-relation queries the response was YES. [2021-12-17 22:48:11,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1246 conditions, 667 events. 71/667 cut-off events. For 302/325 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3264 event pairs, 27 based on Foata normal form. 1/638 useless extension candidates. Maximal degree in co-relation 1221. Up to 183 conditions per place. [2021-12-17 22:48:11,277 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 72 selfloop transitions, 6 changer transitions 17/274 dead transitions. [2021-12-17 22:48:11,278 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 274 transitions, 1039 flow [2021-12-17 22:48:11,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 22:48:11,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-17 22:48:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2440 transitions. [2021-12-17 22:48:11,283 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7629768605378362 [2021-12-17 22:48:11,283 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2440 transitions. [2021-12-17 22:48:11,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2440 transitions. [2021-12-17 22:48:11,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:11,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2440 transitions. [2021-12-17 22:48:11,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 187.69230769230768) internal successors, (2440), 13 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:11,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:11,296 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:11,296 INFO L186 Difference]: Start difference. First operand has 249 places, 234 transitions, 637 flow. Second operand 13 states and 2440 transitions. [2021-12-17 22:48:11,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 274 transitions, 1039 flow [2021-12-17 22:48:11,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 274 transitions, 963 flow, removed 38 selfloop flow, removed 5 redundant places. [2021-12-17 22:48:11,303 INFO L242 Difference]: Finished difference. Result has 261 places, 235 transitions, 660 flow [2021-12-17 22:48:11,303 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=660, PETRI_PLACES=261, PETRI_TRANSITIONS=235} [2021-12-17 22:48:11,303 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 44 predicate places. [2021-12-17 22:48:11,304 INFO L470 AbstractCegarLoop]: Abstraction has has 261 places, 235 transitions, 660 flow [2021-12-17 22:48:11,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:11,304 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:11,305 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:11,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 22:48:11,305 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:11,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:11,305 INFO L85 PathProgramCache]: Analyzing trace with hash -689111047, now seen corresponding path program 3 times [2021-12-17 22:48:11,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:11,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052663266] [2021-12-17 22:48:11,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:11,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:11,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:11,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052663266] [2021-12-17 22:48:11,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052663266] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:11,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:11,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 22:48:11,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451324836] [2021-12-17 22:48:11,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:11,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 22:48:11,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:11,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 22:48:11,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 22:48:11,421 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-17 22:48:11,422 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 235 transitions, 660 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:11,422 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:11,422 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-17 22:48:11,423 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:11,620 INFO L129 PetriNetUnfolder]: 70/671 cut-off events. [2021-12-17 22:48:11,621 INFO L130 PetriNetUnfolder]: For 410/433 co-relation queries the response was YES. [2021-12-17 22:48:11,623 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1297 conditions, 671 events. 70/671 cut-off events. For 410/433 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3363 event pairs, 24 based on Foata normal form. 1/647 useless extension candidates. Maximal degree in co-relation 1266. Up to 182 conditions per place. [2021-12-17 22:48:11,625 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 72 selfloop transitions, 6 changer transitions 18/275 dead transitions. [2021-12-17 22:48:11,635 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 275 transitions, 1078 flow [2021-12-17 22:48:11,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 22:48:11,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-17 22:48:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2442 transitions. [2021-12-17 22:48:11,640 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7636022514071295 [2021-12-17 22:48:11,641 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2442 transitions. [2021-12-17 22:48:11,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2442 transitions. [2021-12-17 22:48:11,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:11,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2442 transitions. [2021-12-17 22:48:11,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 187.84615384615384) internal successors, (2442), 13 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:11,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:11,654 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:11,654 INFO L186 Difference]: Start difference. First operand has 261 places, 235 transitions, 660 flow. Second operand 13 states and 2442 transitions. [2021-12-17 22:48:11,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 275 transitions, 1078 flow [2021-12-17 22:48:11,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 275 transitions, 1044 flow, removed 15 selfloop flow, removed 8 redundant places. [2021-12-17 22:48:11,661 INFO L242 Difference]: Finished difference. Result has 266 places, 235 transitions, 681 flow [2021-12-17 22:48:11,661 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=681, PETRI_PLACES=266, PETRI_TRANSITIONS=235} [2021-12-17 22:48:11,662 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 49 predicate places. [2021-12-17 22:48:11,662 INFO L470 AbstractCegarLoop]: Abstraction has has 266 places, 235 transitions, 681 flow [2021-12-17 22:48:11,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:11,663 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:11,663 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:11,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 22:48:11,663 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:11,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:11,664 INFO L85 PathProgramCache]: Analyzing trace with hash 408929291, now seen corresponding path program 4 times [2021-12-17 22:48:11,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:11,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395325602] [2021-12-17 22:48:11,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:11,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:11,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:11,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395325602] [2021-12-17 22:48:11,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395325602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:11,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:11,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 22:48:11,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122373266] [2021-12-17 22:48:11,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:11,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 22:48:11,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:11,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 22:48:11,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 22:48:11,811 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-17 22:48:11,813 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 235 transitions, 681 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:11,813 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:11,813 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-17 22:48:11,813 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:11,985 INFO L129 PetriNetUnfolder]: 65/673 cut-off events. [2021-12-17 22:48:11,985 INFO L130 PetriNetUnfolder]: For 582/606 co-relation queries the response was YES. [2021-12-17 22:48:11,988 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1339 conditions, 673 events. 65/673 cut-off events. For 582/606 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3391 event pairs, 27 based on Foata normal form. 2/648 useless extension candidates. Maximal degree in co-relation 1306. Up to 216 conditions per place. [2021-12-17 22:48:11,990 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 55 selfloop transitions, 10 changer transitions 11/255 dead transitions. [2021-12-17 22:48:11,990 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 255 transitions, 1023 flow [2021-12-17 22:48:11,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 22:48:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-17 22:48:11,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2061 transitions. [2021-12-17 22:48:11,995 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.761640798226164 [2021-12-17 22:48:11,995 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2061 transitions. [2021-12-17 22:48:11,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2061 transitions. [2021-12-17 22:48:11,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:11,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2061 transitions. [2021-12-17 22:48:12,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.36363636363637) internal successors, (2061), 11 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:12,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:12,004 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:12,005 INFO L186 Difference]: Start difference. First operand has 266 places, 235 transitions, 681 flow. Second operand 11 states and 2061 transitions. [2021-12-17 22:48:12,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 255 transitions, 1023 flow [2021-12-17 22:48:12,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 255 transitions, 938 flow, removed 29 selfloop flow, removed 11 redundant places. [2021-12-17 22:48:12,012 INFO L242 Difference]: Finished difference. Result has 265 places, 241 transitions, 757 flow [2021-12-17 22:48:12,012 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=757, PETRI_PLACES=265, PETRI_TRANSITIONS=241} [2021-12-17 22:48:12,013 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 48 predicate places. [2021-12-17 22:48:12,013 INFO L470 AbstractCegarLoop]: Abstraction has has 265 places, 241 transitions, 757 flow [2021-12-17 22:48:12,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:12,014 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:12,014 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:12,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 22:48:12,014 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:12,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:12,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1378763287, now seen corresponding path program 5 times [2021-12-17 22:48:12,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:12,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594114485] [2021-12-17 22:48:12,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:12,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:12,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:12,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594114485] [2021-12-17 22:48:12,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594114485] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:12,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:12,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 22:48:12,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727558662] [2021-12-17 22:48:12,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:12,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 22:48:12,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:12,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 22:48:12,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 22:48:12,129 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-17 22:48:12,130 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 241 transitions, 757 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:12,130 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:12,131 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-17 22:48:12,131 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:12,302 INFO L129 PetriNetUnfolder]: 61/665 cut-off events. [2021-12-17 22:48:12,303 INFO L130 PetriNetUnfolder]: For 479/507 co-relation queries the response was YES. [2021-12-17 22:48:12,306 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1278 conditions, 665 events. 61/665 cut-off events. For 479/507 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3331 event pairs, 25 based on Foata normal form. 4/643 useless extension candidates. Maximal degree in co-relation 1245. Up to 207 conditions per place. [2021-12-17 22:48:12,308 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 53 selfloop transitions, 3 changer transitions 20/255 dead transitions. [2021-12-17 22:48:12,308 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 255 transitions, 1011 flow [2021-12-17 22:48:12,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 22:48:12,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-17 22:48:12,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2242 transitions. [2021-12-17 22:48:12,313 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7594850948509485 [2021-12-17 22:48:12,314 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2242 transitions. [2021-12-17 22:48:12,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2242 transitions. [2021-12-17 22:48:12,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:12,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2242 transitions. [2021-12-17 22:48:12,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.83333333333334) internal successors, (2242), 12 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:12,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:12,325 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:12,325 INFO L186 Difference]: Start difference. First operand has 265 places, 241 transitions, 757 flow. Second operand 12 states and 2242 transitions. [2021-12-17 22:48:12,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 255 transitions, 1011 flow [2021-12-17 22:48:12,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 255 transitions, 962 flow, removed 21 selfloop flow, removed 5 redundant places. [2021-12-17 22:48:12,334 INFO L242 Difference]: Finished difference. Result has 272 places, 234 transitions, 673 flow [2021-12-17 22:48:12,334 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=673, PETRI_PLACES=272, PETRI_TRANSITIONS=234} [2021-12-17 22:48:12,335 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 55 predicate places. [2021-12-17 22:48:12,335 INFO L470 AbstractCegarLoop]: Abstraction has has 272 places, 234 transitions, 673 flow [2021-12-17 22:48:12,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:12,336 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:12,336 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:12,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 22:48:12,337 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:12,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:12,338 INFO L85 PathProgramCache]: Analyzing trace with hash -42250989, now seen corresponding path program 6 times [2021-12-17 22:48:12,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:12,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215609677] [2021-12-17 22:48:12,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:12,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:12,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:12,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215609677] [2021-12-17 22:48:12,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215609677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:12,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:12,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 22:48:12,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883809128] [2021-12-17 22:48:12,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:12,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 22:48:12,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:12,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 22:48:12,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 22:48:12,476 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-17 22:48:12,478 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 234 transitions, 673 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:12,478 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:12,478 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-17 22:48:12,478 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:12,675 INFO L129 PetriNetUnfolder]: 54/590 cut-off events. [2021-12-17 22:48:12,676 INFO L130 PetriNetUnfolder]: For 304/323 co-relation queries the response was YES. [2021-12-17 22:48:12,678 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1062 conditions, 590 events. 54/590 cut-off events. For 304/323 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2684 event pairs, 24 based on Foata normal form. 1/566 useless extension candidates. Maximal degree in co-relation 1027. Up to 176 conditions per place. [2021-12-17 22:48:12,679 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 45 selfloop transitions, 2 changer transitions 21/244 dead transitions. [2021-12-17 22:48:12,680 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 244 transitions, 859 flow [2021-12-17 22:48:12,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 22:48:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-17 22:48:12,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2238 transitions. [2021-12-17 22:48:12,685 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.758130081300813 [2021-12-17 22:48:12,685 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2238 transitions. [2021-12-17 22:48:12,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2238 transitions. [2021-12-17 22:48:12,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:12,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2238 transitions. [2021-12-17 22:48:12,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.5) internal successors, (2238), 12 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:12,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:12,697 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:12,697 INFO L186 Difference]: Start difference. First operand has 272 places, 234 transitions, 673 flow. Second operand 12 states and 2238 transitions. [2021-12-17 22:48:12,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 244 transitions, 859 flow [2021-12-17 22:48:12,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 244 transitions, 789 flow, removed 19 selfloop flow, removed 18 redundant places. [2021-12-17 22:48:12,704 INFO L242 Difference]: Finished difference. Result has 257 places, 223 transitions, 561 flow [2021-12-17 22:48:12,704 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=561, PETRI_PLACES=257, PETRI_TRANSITIONS=223} [2021-12-17 22:48:12,705 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 40 predicate places. [2021-12-17 22:48:12,705 INFO L470 AbstractCegarLoop]: Abstraction has has 257 places, 223 transitions, 561 flow [2021-12-17 22:48:12,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:12,706 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:12,706 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:12,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 22:48:12,706 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:12,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:12,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1569864439, now seen corresponding path program 2 times [2021-12-17 22:48:12,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:12,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425578229] [2021-12-17 22:48:12,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:12,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:12,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:12,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:12,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425578229] [2021-12-17 22:48:12,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425578229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:12,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:12,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 22:48:12,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566372419] [2021-12-17 22:48:12,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:12,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 22:48:12,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:12,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 22:48:12,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 22:48:12,817 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-17 22:48:12,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 223 transitions, 561 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:12,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:12,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-17 22:48:12,819 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:13,006 INFO L129 PetriNetUnfolder]: 57/598 cut-off events. [2021-12-17 22:48:13,006 INFO L130 PetriNetUnfolder]: For 161/174 co-relation queries the response was YES. [2021-12-17 22:48:13,009 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1000 conditions, 598 events. 57/598 cut-off events. For 161/174 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2703 event pairs, 19 based on Foata normal form. 1/575 useless extension candidates. Maximal degree in co-relation 976. Up to 164 conditions per place. [2021-12-17 22:48:13,010 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 50 selfloop transitions, 8 changer transitions 16/250 dead transitions. [2021-12-17 22:48:13,011 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 250 transitions, 816 flow [2021-12-17 22:48:13,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 22:48:13,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-17 22:48:13,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2066 transitions. [2021-12-17 22:48:13,013 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7634885439763488 [2021-12-17 22:48:13,014 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2066 transitions. [2021-12-17 22:48:13,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2066 transitions. [2021-12-17 22:48:13,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:13,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2066 transitions. [2021-12-17 22:48:13,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.8181818181818) internal successors, (2066), 11 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:13,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:13,022 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:13,022 INFO L186 Difference]: Start difference. First operand has 257 places, 223 transitions, 561 flow. Second operand 11 states and 2066 transitions. [2021-12-17 22:48:13,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 250 transitions, 816 flow [2021-12-17 22:48:13,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 250 transitions, 768 flow, removed 17 selfloop flow, removed 12 redundant places. [2021-12-17 22:48:13,029 INFO L242 Difference]: Finished difference. Result has 247 places, 229 transitions, 598 flow [2021-12-17 22:48:13,030 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=598, PETRI_PLACES=247, PETRI_TRANSITIONS=229} [2021-12-17 22:48:13,030 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 30 predicate places. [2021-12-17 22:48:13,030 INFO L470 AbstractCegarLoop]: Abstraction has has 247 places, 229 transitions, 598 flow [2021-12-17 22:48:13,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:13,031 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:13,031 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:13,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 22:48:13,031 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:13,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:13,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1125693919, now seen corresponding path program 3 times [2021-12-17 22:48:13,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:13,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637240769] [2021-12-17 22:48:13,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:13,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:13,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:13,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:13,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637240769] [2021-12-17 22:48:13,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637240769] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:13,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:13,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 22:48:13,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144133128] [2021-12-17 22:48:13,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:13,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 22:48:13,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:13,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 22:48:13,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-17 22:48:13,150 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-17 22:48:13,152 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 229 transitions, 598 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:13,152 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:13,152 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-17 22:48:13,152 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:13,315 INFO L129 PetriNetUnfolder]: 55/598 cut-off events. [2021-12-17 22:48:13,315 INFO L130 PetriNetUnfolder]: For 194/211 co-relation queries the response was YES. [2021-12-17 22:48:13,318 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1044 conditions, 598 events. 55/598 cut-off events. For 194/211 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2735 event pairs, 15 based on Foata normal form. 1/575 useless extension candidates. Maximal degree in co-relation 1020. Up to 136 conditions per place. [2021-12-17 22:48:13,319 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 67 selfloop transitions, 6 changer transitions 23/272 dead transitions. [2021-12-17 22:48:13,320 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 272 transitions, 978 flow [2021-12-17 22:48:13,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 22:48:13,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-17 22:48:13,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2443 transitions. [2021-12-17 22:48:13,323 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7639149468417761 [2021-12-17 22:48:13,323 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2443 transitions. [2021-12-17 22:48:13,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2443 transitions. [2021-12-17 22:48:13,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:13,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2443 transitions. [2021-12-17 22:48:13,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 187.92307692307693) internal successors, (2443), 13 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:13,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:13,337 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:13,337 INFO L186 Difference]: Start difference. First operand has 247 places, 229 transitions, 598 flow. Second operand 13 states and 2443 transitions. [2021-12-17 22:48:13,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 272 transitions, 978 flow [2021-12-17 22:48:13,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 272 transitions, 928 flow, removed 20 selfloop flow, removed 6 redundant places. [2021-12-17 22:48:13,345 INFO L242 Difference]: Finished difference. Result has 257 places, 229 transitions, 614 flow [2021-12-17 22:48:13,345 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=614, PETRI_PLACES=257, PETRI_TRANSITIONS=229} [2021-12-17 22:48:13,346 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 40 predicate places. [2021-12-17 22:48:13,346 INFO L470 AbstractCegarLoop]: Abstraction has has 257 places, 229 transitions, 614 flow [2021-12-17 22:48:13,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:13,346 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:13,347 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:13,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 22:48:13,347 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:13,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:13,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1170519399, now seen corresponding path program 4 times [2021-12-17 22:48:13,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:13,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851856719] [2021-12-17 22:48:13,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:13,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:13,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:13,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851856719] [2021-12-17 22:48:13,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851856719] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:13,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:13,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 22:48:13,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742829929] [2021-12-17 22:48:13,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:13,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 22:48:13,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:13,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 22:48:13,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 22:48:13,445 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-17 22:48:13,446 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 229 transitions, 614 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:13,446 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:13,446 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-17 22:48:13,446 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:13,657 INFO L129 PetriNetUnfolder]: 52/593 cut-off events. [2021-12-17 22:48:13,658 INFO L130 PetriNetUnfolder]: For 277/294 co-relation queries the response was YES. [2021-12-17 22:48:13,660 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1051 conditions, 593 events. 52/593 cut-off events. For 277/294 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2728 event pairs, 13 based on Foata normal form. 1/572 useless extension candidates. Maximal degree in co-relation 1023. Up to 162 conditions per place. [2021-12-17 22:48:13,662 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 53 selfloop transitions, 10 changer transitions 16/255 dead transitions. [2021-12-17 22:48:13,662 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 255 transitions, 933 flow [2021-12-17 22:48:13,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 22:48:13,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-17 22:48:13,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2245 transitions. [2021-12-17 22:48:13,667 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7605013550135501 [2021-12-17 22:48:13,667 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2245 transitions. [2021-12-17 22:48:13,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2245 transitions. [2021-12-17 22:48:13,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:13,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2245 transitions. [2021-12-17 22:48:13,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 187.08333333333334) internal successors, (2245), 12 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:13,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:13,674 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:13,675 INFO L186 Difference]: Start difference. First operand has 257 places, 229 transitions, 614 flow. Second operand 12 states and 2245 transitions. [2021-12-17 22:48:13,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 255 transitions, 933 flow [2021-12-17 22:48:13,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 255 transitions, 868 flow, removed 18 selfloop flow, removed 11 redundant places. [2021-12-17 22:48:13,681 INFO L242 Difference]: Finished difference. Result has 256 places, 235 transitions, 676 flow [2021-12-17 22:48:13,681 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=676, PETRI_PLACES=256, PETRI_TRANSITIONS=235} [2021-12-17 22:48:13,681 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 39 predicate places. [2021-12-17 22:48:13,682 INFO L470 AbstractCegarLoop]: Abstraction has has 256 places, 235 transitions, 676 flow [2021-12-17 22:48:13,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:13,682 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:13,682 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:13,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 22:48:13,683 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:13,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:13,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1860783933, now seen corresponding path program 5 times [2021-12-17 22:48:13,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:13,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114064288] [2021-12-17 22:48:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:13,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:13,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:13,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114064288] [2021-12-17 22:48:13,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114064288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:13,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:13,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 22:48:13,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583512524] [2021-12-17 22:48:13,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:13,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 22:48:13,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:13,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 22:48:13,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-17 22:48:13,775 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-17 22:48:13,776 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 235 transitions, 676 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:13,776 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:13,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-17 22:48:13,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:13,939 INFO L129 PetriNetUnfolder]: 47/590 cut-off events. [2021-12-17 22:48:13,940 INFO L130 PetriNetUnfolder]: For 264/284 co-relation queries the response was YES. [2021-12-17 22:48:13,942 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 590 events. 47/590 cut-off events. For 264/284 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2703 event pairs, 13 based on Foata normal form. 4/572 useless extension candidates. Maximal degree in co-relation 1009. Up to 162 conditions per place. [2021-12-17 22:48:13,944 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 50 selfloop transitions, 3 changer transitions 22/251 dead transitions. [2021-12-17 22:48:13,944 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 251 transitions, 912 flow [2021-12-17 22:48:13,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 22:48:13,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-17 22:48:13,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2060 transitions. [2021-12-17 22:48:13,946 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7612712490761271 [2021-12-17 22:48:13,946 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2060 transitions. [2021-12-17 22:48:13,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2060 transitions. [2021-12-17 22:48:13,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:13,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2060 transitions. [2021-12-17 22:48:13,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.27272727272728) internal successors, (2060), 11 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:13,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:13,956 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:13,956 INFO L186 Difference]: Start difference. First operand has 256 places, 235 transitions, 676 flow. Second operand 11 states and 2060 transitions. [2021-12-17 22:48:13,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 251 transitions, 912 flow [2021-12-17 22:48:13,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 251 transitions, 892 flow, removed 10 selfloop flow, removed 3 redundant places. [2021-12-17 22:48:13,962 INFO L242 Difference]: Finished difference. Result has 262 places, 228 transitions, 613 flow [2021-12-17 22:48:13,964 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=613, PETRI_PLACES=262, PETRI_TRANSITIONS=228} [2021-12-17 22:48:13,964 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 45 predicate places. [2021-12-17 22:48:13,964 INFO L470 AbstractCegarLoop]: Abstraction has has 262 places, 228 transitions, 613 flow [2021-12-17 22:48:13,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:13,965 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:13,965 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:13,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 22:48:13,965 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:13,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:13,966 INFO L85 PathProgramCache]: Analyzing trace with hash -541321939, now seen corresponding path program 6 times [2021-12-17 22:48:13,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:13,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494112028] [2021-12-17 22:48:13,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:13,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:14,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:14,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494112028] [2021-12-17 22:48:14,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494112028] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:14,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:14,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 22:48:14,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395796389] [2021-12-17 22:48:14,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:14,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 22:48:14,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:14,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 22:48:14,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 22:48:14,071 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-17 22:48:14,073 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 228 transitions, 613 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:14,073 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:14,073 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-17 22:48:14,073 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:14,254 INFO L129 PetriNetUnfolder]: 41/520 cut-off events. [2021-12-17 22:48:14,254 INFO L130 PetriNetUnfolder]: For 184/194 co-relation queries the response was YES. [2021-12-17 22:48:14,256 INFO L84 FinitePrefix]: Finished finitePrefix Result has 860 conditions, 520 events. 41/520 cut-off events. For 184/194 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2089 event pairs, 12 based on Foata normal form. 1/500 useless extension candidates. Maximal degree in co-relation 830. Up to 129 conditions per place. [2021-12-17 22:48:14,257 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 38 selfloop transitions, 0 changer transitions 37/242 dead transitions. [2021-12-17 22:48:14,257 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 242 transitions, 809 flow [2021-12-17 22:48:14,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 22:48:14,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-17 22:48:14,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2239 transitions. [2021-12-17 22:48:14,260 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7584688346883469 [2021-12-17 22:48:14,260 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2239 transitions. [2021-12-17 22:48:14,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2239 transitions. [2021-12-17 22:48:14,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:14,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2239 transitions. [2021-12-17 22:48:14,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.58333333333334) internal successors, (2239), 12 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:14,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:14,268 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:14,268 INFO L186 Difference]: Start difference. First operand has 262 places, 228 transitions, 613 flow. Second operand 12 states and 2239 transitions. [2021-12-17 22:48:14,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 242 transitions, 809 flow [2021-12-17 22:48:14,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 242 transitions, 739 flow, removed 17 selfloop flow, removed 17 redundant places. [2021-12-17 22:48:14,274 INFO L242 Difference]: Finished difference. Result has 248 places, 205 transitions, 442 flow [2021-12-17 22:48:14,274 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=442, PETRI_PLACES=248, PETRI_TRANSITIONS=205} [2021-12-17 22:48:14,275 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 31 predicate places. [2021-12-17 22:48:14,275 INFO L470 AbstractCegarLoop]: Abstraction has has 248 places, 205 transitions, 442 flow [2021-12-17 22:48:14,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:14,275 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:14,276 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:14,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 22:48:14,276 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:14,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:14,276 INFO L85 PathProgramCache]: Analyzing trace with hash 46791359, now seen corresponding path program 1 times [2021-12-17 22:48:14,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:14,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943449603] [2021-12-17 22:48:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:14,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:14,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:14,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943449603] [2021-12-17 22:48:14,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943449603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:14,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:14,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 22:48:14,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998652386] [2021-12-17 22:48:14,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:14,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 22:48:14,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:14,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 22:48:14,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-12-17 22:48:14,653 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2021-12-17 22:48:14,655 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 205 transitions, 442 flow. Second operand has 20 states, 20 states have (on average 161.7) internal successors, (3234), 20 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:14,655 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:14,655 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2021-12-17 22:48:14,655 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:15,983 INFO L129 PetriNetUnfolder]: 197/1694 cut-off events. [2021-12-17 22:48:15,983 INFO L130 PetriNetUnfolder]: For 84/87 co-relation queries the response was YES. [2021-12-17 22:48:15,988 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2489 conditions, 1694 events. 197/1694 cut-off events. For 84/87 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 12164 event pairs, 38 based on Foata normal form. 4/1573 useless extension candidates. Maximal degree in co-relation 2470. Up to 127 conditions per place. [2021-12-17 22:48:15,992 INFO L132 encePairwiseOnDemand]: 217/246 looper letters, 152 selfloop transitions, 37 changer transitions 13/341 dead transitions. [2021-12-17 22:48:15,993 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 341 transitions, 1158 flow [2021-12-17 22:48:15,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-17 22:48:15,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-12-17 22:48:15,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4655 transitions. [2021-12-17 22:48:16,001 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6758130081300813 [2021-12-17 22:48:16,001 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4655 transitions. [2021-12-17 22:48:16,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4655 transitions. [2021-12-17 22:48:16,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:16,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4655 transitions. [2021-12-17 22:48:16,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 166.25) internal successors, (4655), 28 states have internal predecessors, (4655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:16,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 246.0) internal successors, (7134), 29 states have internal predecessors, (7134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:16,017 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 246.0) internal successors, (7134), 29 states have internal predecessors, (7134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:16,017 INFO L186 Difference]: Start difference. First operand has 248 places, 205 transitions, 442 flow. Second operand 28 states and 4655 transitions. [2021-12-17 22:48:16,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 341 transitions, 1158 flow [2021-12-17 22:48:16,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 341 transitions, 1124 flow, removed 17 selfloop flow, removed 4 redundant places. [2021-12-17 22:48:16,023 INFO L242 Difference]: Finished difference. Result has 251 places, 230 transitions, 641 flow [2021-12-17 22:48:16,024 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=641, PETRI_PLACES=251, PETRI_TRANSITIONS=230} [2021-12-17 22:48:16,024 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 34 predicate places. [2021-12-17 22:48:16,024 INFO L470 AbstractCegarLoop]: Abstraction has has 251 places, 230 transitions, 641 flow [2021-12-17 22:48:16,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 161.7) internal successors, (3234), 20 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:16,026 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:16,026 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:16,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 22:48:16,026 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:16,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:16,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1289123226, now seen corresponding path program 1 times [2021-12-17 22:48:16,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:16,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534831874] [2021-12-17 22:48:16,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:16,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:16,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:16,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534831874] [2021-12-17 22:48:16,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534831874] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:48:16,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794758846] [2021-12-17 22:48:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:16,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:48:16,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:48:16,211 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) [2021-12-17 22:48:16,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 22:48:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:16,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 22:48:16,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:48:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:17,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:48:17,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:17,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794758846] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 22:48:17,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 22:48:17,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2021-12-17 22:48:17,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521935439] [2021-12-17 22:48:17,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:17,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 22:48:17,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:17,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 22:48:17,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-12-17 22:48:17,671 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2021-12-17 22:48:17,672 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 230 transitions, 641 flow. Second operand has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:17,672 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:17,672 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2021-12-17 22:48:17,673 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:18,343 INFO L129 PetriNetUnfolder]: 206/1858 cut-off events. [2021-12-17 22:48:18,344 INFO L130 PetriNetUnfolder]: For 659/667 co-relation queries the response was YES. [2021-12-17 22:48:18,351 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3105 conditions, 1858 events. 206/1858 cut-off events. For 659/667 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 13896 event pairs, 81 based on Foata normal form. 6/1719 useless extension candidates. Maximal degree in co-relation 3076. Up to 224 conditions per place. [2021-12-17 22:48:18,356 INFO L132 encePairwiseOnDemand]: 226/246 looper letters, 145 selfloop transitions, 22 changer transitions 7/313 dead transitions. [2021-12-17 22:48:18,356 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 313 transitions, 1238 flow [2021-12-17 22:48:18,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 22:48:18,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-17 22:48:18,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3341 transitions. [2021-12-17 22:48:18,360 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6790650406504065 [2021-12-17 22:48:18,361 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3341 transitions. [2021-12-17 22:48:18,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3341 transitions. [2021-12-17 22:48:18,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:18,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3341 transitions. [2021-12-17 22:48:18,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 167.05) internal successors, (3341), 20 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:18,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 246.0) internal successors, (5166), 21 states have internal predecessors, (5166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:18,372 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 246.0) internal successors, (5166), 21 states have internal predecessors, (5166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:18,372 INFO L186 Difference]: Start difference. First operand has 251 places, 230 transitions, 641 flow. Second operand 20 states and 3341 transitions. [2021-12-17 22:48:18,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 313 transitions, 1238 flow [2021-12-17 22:48:18,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 313 transitions, 1206 flow, removed 8 selfloop flow, removed 10 redundant places. [2021-12-17 22:48:18,380 INFO L242 Difference]: Finished difference. Result has 266 places, 236 transitions, 725 flow [2021-12-17 22:48:18,380 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=725, PETRI_PLACES=266, PETRI_TRANSITIONS=236} [2021-12-17 22:48:18,381 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 49 predicate places. [2021-12-17 22:48:18,381 INFO L470 AbstractCegarLoop]: Abstraction has has 266 places, 236 transitions, 725 flow [2021-12-17 22:48:18,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:18,381 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:18,382 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:18,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 22:48:18,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-17 22:48:18,606 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:18,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:18,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1113965941, now seen corresponding path program 1 times [2021-12-17 22:48:18,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:18,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759312536] [2021-12-17 22:48:18,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:18,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:18,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:18,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759312536] [2021-12-17 22:48:18,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759312536] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:48:18,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375112170] [2021-12-17 22:48:18,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:18,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:48:18,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:48:18,768 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) [2021-12-17 22:48:18,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 22:48:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:18,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 22:48:18,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:48:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:19,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:48:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:20,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375112170] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 22:48:20,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 22:48:20,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2021-12-17 22:48:20,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775892914] [2021-12-17 22:48:20,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:20,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 22:48:20,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:20,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 22:48:20,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-12-17 22:48:20,072 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2021-12-17 22:48:20,073 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 236 transitions, 725 flow. Second operand has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:20,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:20,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2021-12-17 22:48:20,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:20,790 INFO L129 PetriNetUnfolder]: 269/2431 cut-off events. [2021-12-17 22:48:20,790 INFO L130 PetriNetUnfolder]: For 1264/1282 co-relation queries the response was YES. [2021-12-17 22:48:20,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4217 conditions, 2431 events. 269/2431 cut-off events. For 1264/1282 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 20059 event pairs, 111 based on Foata normal form. 6/2242 useless extension candidates. Maximal degree in co-relation 4182. Up to 410 conditions per place. [2021-12-17 22:48:20,810 INFO L132 encePairwiseOnDemand]: 229/246 looper letters, 152 selfloop transitions, 23 changer transitions 11/325 dead transitions. [2021-12-17 22:48:20,810 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 325 transitions, 1399 flow [2021-12-17 22:48:20,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 22:48:20,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-17 22:48:20,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3027 transitions. [2021-12-17 22:48:20,814 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6836043360433605 [2021-12-17 22:48:20,814 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3027 transitions. [2021-12-17 22:48:20,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3027 transitions. [2021-12-17 22:48:20,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:20,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3027 transitions. [2021-12-17 22:48:20,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 168.16666666666666) internal successors, (3027), 18 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:20,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 246.0) internal successors, (4674), 19 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:20,826 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 246.0) internal successors, (4674), 19 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:20,826 INFO L186 Difference]: Start difference. First operand has 266 places, 236 transitions, 725 flow. Second operand 18 states and 3027 transitions. [2021-12-17 22:48:20,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 325 transitions, 1399 flow [2021-12-17 22:48:20,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 325 transitions, 1338 flow, removed 20 selfloop flow, removed 11 redundant places. [2021-12-17 22:48:20,838 INFO L242 Difference]: Finished difference. Result has 276 places, 240 transitions, 791 flow [2021-12-17 22:48:20,838 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=791, PETRI_PLACES=276, PETRI_TRANSITIONS=240} [2021-12-17 22:48:20,839 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 59 predicate places. [2021-12-17 22:48:20,839 INFO L470 AbstractCegarLoop]: Abstraction has has 276 places, 240 transitions, 791 flow [2021-12-17 22:48:20,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:20,840 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:20,840 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:20,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 22:48:21,055 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,SelfDestructingSolverStorable21 [2021-12-17 22:48:21,056 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:21,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:21,056 INFO L85 PathProgramCache]: Analyzing trace with hash -447164831, now seen corresponding path program 2 times [2021-12-17 22:48:21,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:21,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98311856] [2021-12-17 22:48:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:21,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:21,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:21,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:21,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98311856] [2021-12-17 22:48:21,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98311856] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:48:21,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285115959] [2021-12-17 22:48:21,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 22:48:21,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:48:21,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:48:21,232 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) [2021-12-17 22:48:21,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 22:48:21,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-17 22:48:21,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:48:21,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 22:48:21,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:48:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:48:21,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 22:48:21,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285115959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:21,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 22:48:21,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 25 [2021-12-17 22:48:21,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448159224] [2021-12-17 22:48:21,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:21,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 22:48:21,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:21,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 22:48:21,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-12-17 22:48:21,887 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 246 [2021-12-17 22:48:21,888 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 240 transitions, 791 flow. Second operand has 12 states, 12 states have (on average 180.66666666666666) internal successors, (2168), 12 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:21,888 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:21,888 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 246 [2021-12-17 22:48:21,888 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:22,601 INFO L129 PetriNetUnfolder]: 248/2642 cut-off events. [2021-12-17 22:48:22,602 INFO L130 PetriNetUnfolder]: For 1569/1615 co-relation queries the response was YES. [2021-12-17 22:48:22,613 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4677 conditions, 2642 events. 248/2642 cut-off events. For 1569/1615 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 22466 event pairs, 101 based on Foata normal form. 22/2483 useless extension candidates. Maximal degree in co-relation 4637. Up to 495 conditions per place. [2021-12-17 22:48:22,619 INFO L132 encePairwiseOnDemand]: 233/246 looper letters, 83 selfloop transitions, 4 changer transitions 18/276 dead transitions. [2021-12-17 22:48:22,619 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 276 transitions, 1135 flow [2021-12-17 22:48:22,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 22:48:22,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-17 22:48:22,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2558 transitions. [2021-12-17 22:48:22,622 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7427409988385598 [2021-12-17 22:48:22,622 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2558 transitions. [2021-12-17 22:48:22,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2558 transitions. [2021-12-17 22:48:22,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:22,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2558 transitions. [2021-12-17 22:48:22,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 182.71428571428572) internal successors, (2558), 14 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:22,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 246.0) internal successors, (3690), 15 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:22,631 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 246.0) internal successors, (3690), 15 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:22,631 INFO L186 Difference]: Start difference. First operand has 276 places, 240 transitions, 791 flow. Second operand 14 states and 2558 transitions. [2021-12-17 22:48:22,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 276 transitions, 1135 flow [2021-12-17 22:48:22,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 276 transitions, 1082 flow, removed 16 selfloop flow, removed 10 redundant places. [2021-12-17 22:48:22,644 INFO L242 Difference]: Finished difference. Result has 288 places, 240 transitions, 796 flow [2021-12-17 22:48:22,645 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=796, PETRI_PLACES=288, PETRI_TRANSITIONS=240} [2021-12-17 22:48:22,645 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 71 predicate places. [2021-12-17 22:48:22,646 INFO L470 AbstractCegarLoop]: Abstraction has has 288 places, 240 transitions, 796 flow [2021-12-17 22:48:22,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 180.66666666666666) internal successors, (2168), 12 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:22,647 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:22,647 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:22,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 22:48:22,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:48:22,871 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:22,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:22,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1463331462, now seen corresponding path program 1 times [2021-12-17 22:48:22,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:22,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612430471] [2021-12-17 22:48:22,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:22,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:22,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:22,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612430471] [2021-12-17 22:48:22,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612430471] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:22,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:22,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 22:48:22,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416107744] [2021-12-17 22:48:22,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:22,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:48:22,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:22,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:48:22,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 22:48:22,934 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2021-12-17 22:48:22,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 240 transitions, 796 flow. Second operand has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:22,936 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:22,936 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2021-12-17 22:48:22,936 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:23,206 INFO L129 PetriNetUnfolder]: 211/1604 cut-off events. [2021-12-17 22:48:23,207 INFO L130 PetriNetUnfolder]: For 2071/2107 co-relation queries the response was YES. [2021-12-17 22:48:23,214 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3024 conditions, 1604 events. 211/1604 cut-off events. For 2071/2107 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 11218 event pairs, 116 based on Foata normal form. 2/1467 useless extension candidates. Maximal degree in co-relation 2977. Up to 321 conditions per place. [2021-12-17 22:48:23,218 INFO L132 encePairwiseOnDemand]: 235/246 looper letters, 73 selfloop transitions, 12 changer transitions 4/257 dead transitions. [2021-12-17 22:48:23,218 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 257 transitions, 1045 flow [2021-12-17 22:48:23,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 22:48:23,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-17 22:48:23,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1985 transitions. [2021-12-17 22:48:23,220 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.806910569105691 [2021-12-17 22:48:23,220 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1985 transitions. [2021-12-17 22:48:23,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1985 transitions. [2021-12-17 22:48:23,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:23,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1985 transitions. [2021-12-17 22:48:23,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 198.5) internal successors, (1985), 10 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:23,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:23,226 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:23,226 INFO L186 Difference]: Start difference. First operand has 288 places, 240 transitions, 796 flow. Second operand 10 states and 1985 transitions. [2021-12-17 22:48:23,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 257 transitions, 1045 flow [2021-12-17 22:48:23,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 257 transitions, 1011 flow, removed 13 selfloop flow, removed 13 redundant places. [2021-12-17 22:48:23,236 INFO L242 Difference]: Finished difference. Result has 274 places, 236 transitions, 774 flow [2021-12-17 22:48:23,237 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=774, PETRI_PLACES=274, PETRI_TRANSITIONS=236} [2021-12-17 22:48:23,237 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 57 predicate places. [2021-12-17 22:48:23,237 INFO L470 AbstractCegarLoop]: Abstraction has has 274 places, 236 transitions, 774 flow [2021-12-17 22:48:23,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:23,238 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:23,238 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:23,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 22:48:23,238 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:23,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:23,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1027993710, now seen corresponding path program 1 times [2021-12-17 22:48:23,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:23,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949114874] [2021-12-17 22:48:23,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:23,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:23,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:23,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949114874] [2021-12-17 22:48:23,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949114874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:23,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:23,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 22:48:23,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888631130] [2021-12-17 22:48:23,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:23,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:48:23,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:23,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:48:23,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 22:48:23,300 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2021-12-17 22:48:23,301 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 236 transitions, 774 flow. Second operand has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:23,301 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:23,301 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2021-12-17 22:48:23,301 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:23,555 INFO L129 PetriNetUnfolder]: 272/1644 cut-off events. [2021-12-17 22:48:23,555 INFO L130 PetriNetUnfolder]: For 1479/1503 co-relation queries the response was YES. [2021-12-17 22:48:23,561 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2961 conditions, 1644 events. 272/1644 cut-off events. For 1479/1503 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 10966 event pairs, 139 based on Foata normal form. 8/1515 useless extension candidates. Maximal degree in co-relation 2924. Up to 430 conditions per place. [2021-12-17 22:48:23,564 INFO L132 encePairwiseOnDemand]: 235/246 looper letters, 45 selfloop transitions, 8 changer transitions 34/251 dead transitions. [2021-12-17 22:48:23,564 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 251 transitions, 993 flow [2021-12-17 22:48:23,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 22:48:23,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-17 22:48:23,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1983 transitions. [2021-12-17 22:48:23,567 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8060975609756098 [2021-12-17 22:48:23,568 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1983 transitions. [2021-12-17 22:48:23,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1983 transitions. [2021-12-17 22:48:23,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:23,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1983 transitions. [2021-12-17 22:48:23,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 198.3) internal successors, (1983), 10 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:23,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:23,573 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:23,573 INFO L186 Difference]: Start difference. First operand has 274 places, 236 transitions, 774 flow. Second operand 10 states and 1983 transitions. [2021-12-17 22:48:23,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 251 transitions, 993 flow [2021-12-17 22:48:23,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 251 transitions, 968 flow, removed 3 selfloop flow, removed 8 redundant places. [2021-12-17 22:48:23,581 INFO L242 Difference]: Finished difference. Result has 276 places, 215 transitions, 628 flow [2021-12-17 22:48:23,582 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=628, PETRI_PLACES=276, PETRI_TRANSITIONS=215} [2021-12-17 22:48:23,582 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 59 predicate places. [2021-12-17 22:48:23,582 INFO L470 AbstractCegarLoop]: Abstraction has has 276 places, 215 transitions, 628 flow [2021-12-17 22:48:23,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:23,583 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:23,583 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:23,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 22:48:23,583 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:23,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:23,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1921923888, now seen corresponding path program 1 times [2021-12-17 22:48:23,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:23,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971267781] [2021-12-17 22:48:23,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:23,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:23,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:23,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:23,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971267781] [2021-12-17 22:48:23,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971267781] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:48:23,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256046996] [2021-12-17 22:48:23,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:23,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:48:23,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:48:23,732 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) [2021-12-17 22:48:23,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 22:48:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:23,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 22:48:23,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:48:24,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:24,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:48:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:24,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256046996] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 22:48:24,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 22:48:24,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2021-12-17 22:48:24,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282488283] [2021-12-17 22:48:24,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:24,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 22:48:24,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:24,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 22:48:24,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-12-17 22:48:24,868 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 246 [2021-12-17 22:48:24,869 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 215 transitions, 628 flow. Second operand has 11 states, 11 states have (on average 192.36363636363637) internal successors, (2116), 11 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:24,870 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:24,870 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 246 [2021-12-17 22:48:24,870 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:25,217 INFO L129 PetriNetUnfolder]: 251/1472 cut-off events. [2021-12-17 22:48:25,218 INFO L130 PetriNetUnfolder]: For 1093/1104 co-relation queries the response was YES. [2021-12-17 22:48:25,223 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2591 conditions, 1472 events. 251/1472 cut-off events. For 1093/1104 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 9650 event pairs, 51 based on Foata normal form. 9/1375 useless extension candidates. Maximal degree in co-relation 2553. Up to 147 conditions per place. [2021-12-17 22:48:25,227 INFO L132 encePairwiseOnDemand]: 232/246 looper letters, 70 selfloop transitions, 15 changer transitions 0/247 dead transitions. [2021-12-17 22:48:25,227 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 247 transitions, 949 flow [2021-12-17 22:48:25,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 22:48:25,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-17 22:48:25,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2725 transitions. [2021-12-17 22:48:25,229 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7912311265969802 [2021-12-17 22:48:25,229 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2725 transitions. [2021-12-17 22:48:25,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2725 transitions. [2021-12-17 22:48:25,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:25,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2725 transitions. [2021-12-17 22:48:25,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 194.64285714285714) internal successors, (2725), 14 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:25,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 246.0) internal successors, (3690), 15 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:25,235 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 246.0) internal successors, (3690), 15 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:25,235 INFO L186 Difference]: Start difference. First operand has 276 places, 215 transitions, 628 flow. Second operand 14 states and 2725 transitions. [2021-12-17 22:48:25,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 247 transitions, 949 flow [2021-12-17 22:48:25,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 247 transitions, 839 flow, removed 30 selfloop flow, removed 25 redundant places. [2021-12-17 22:48:25,242 INFO L242 Difference]: Finished difference. Result has 246 places, 219 transitions, 599 flow [2021-12-17 22:48:25,243 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=599, PETRI_PLACES=246, PETRI_TRANSITIONS=219} [2021-12-17 22:48:25,243 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 29 predicate places. [2021-12-17 22:48:25,243 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 219 transitions, 599 flow [2021-12-17 22:48:25,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 192.36363636363637) internal successors, (2116), 11 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:25,244 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:25,244 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:25,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 22:48:25,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-17 22:48:25,467 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:25,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:25,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1696586148, now seen corresponding path program 1 times [2021-12-17 22:48:25,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:25,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494574203] [2021-12-17 22:48:25,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:25,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:48:25,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:25,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494574203] [2021-12-17 22:48:25,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494574203] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:25,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:25,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 22:48:25,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225713902] [2021-12-17 22:48:25,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:25,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:48:25,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:25,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:48:25,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 22:48:25,529 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2021-12-17 22:48:25,530 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 219 transitions, 599 flow. Second operand has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:25,530 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:25,530 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2021-12-17 22:48:25,530 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:25,706 INFO L129 PetriNetUnfolder]: 118/871 cut-off events. [2021-12-17 22:48:25,706 INFO L130 PetriNetUnfolder]: For 413/449 co-relation queries the response was YES. [2021-12-17 22:48:25,709 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1503 conditions, 871 events. 118/871 cut-off events. For 413/449 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 4438 event pairs, 66 based on Foata normal form. 22/823 useless extension candidates. Maximal degree in co-relation 1476. Up to 174 conditions per place. [2021-12-17 22:48:25,713 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 59 selfloop transitions, 8 changer transitions 3/236 dead transitions. [2021-12-17 22:48:25,713 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 236 transitions, 810 flow [2021-12-17 22:48:25,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 22:48:25,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-17 22:48:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1591 transitions. [2021-12-17 22:48:25,715 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8084349593495935 [2021-12-17 22:48:25,715 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1591 transitions. [2021-12-17 22:48:25,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1591 transitions. [2021-12-17 22:48:25,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:25,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1591 transitions. [2021-12-17 22:48:25,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 198.875) internal successors, (1591), 8 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:25,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:25,723 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:25,723 INFO L186 Difference]: Start difference. First operand has 246 places, 219 transitions, 599 flow. Second operand 8 states and 1591 transitions. [2021-12-17 22:48:25,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 236 transitions, 810 flow [2021-12-17 22:48:25,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 236 transitions, 788 flow, removed 1 selfloop flow, removed 9 redundant places. [2021-12-17 22:48:25,728 INFO L242 Difference]: Finished difference. Result has 247 places, 221 transitions, 613 flow [2021-12-17 22:48:25,728 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=613, PETRI_PLACES=247, PETRI_TRANSITIONS=221} [2021-12-17 22:48:25,729 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 30 predicate places. [2021-12-17 22:48:25,729 INFO L470 AbstractCegarLoop]: Abstraction has has 247 places, 221 transitions, 613 flow [2021-12-17 22:48:25,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:25,729 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:25,730 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:25,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-17 22:48:25,730 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:25,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:25,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1201599220, now seen corresponding path program 1 times [2021-12-17 22:48:25,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:25,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638986602] [2021-12-17 22:48:25,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:25,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:25,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:48:25,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:25,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638986602] [2021-12-17 22:48:25,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638986602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:48:25,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:48:25,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 22:48:25,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935968958] [2021-12-17 22:48:25,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:25,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:48:25,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:25,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:48:25,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 22:48:25,810 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2021-12-17 22:48:25,810 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 221 transitions, 613 flow. Second operand has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:25,811 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:25,811 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2021-12-17 22:48:25,811 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:25,957 INFO L129 PetriNetUnfolder]: 137/851 cut-off events. [2021-12-17 22:48:25,957 INFO L130 PetriNetUnfolder]: For 413/417 co-relation queries the response was YES. [2021-12-17 22:48:25,961 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1512 conditions, 851 events. 137/851 cut-off events. For 413/417 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4098 event pairs, 66 based on Foata normal form. 9/806 useless extension candidates. Maximal degree in co-relation 1483. Up to 225 conditions per place. [2021-12-17 22:48:25,963 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 46 selfloop transitions, 6 changer transitions 13/229 dead transitions. [2021-12-17 22:48:25,963 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 229 transitions, 763 flow [2021-12-17 22:48:25,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 22:48:25,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-17 22:48:25,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1588 transitions. [2021-12-17 22:48:25,965 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.806910569105691 [2021-12-17 22:48:25,965 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1588 transitions. [2021-12-17 22:48:25,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1588 transitions. [2021-12-17 22:48:25,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:25,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1588 transitions. [2021-12-17 22:48:25,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 198.5) internal successors, (1588), 8 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:25,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:25,969 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:25,969 INFO L186 Difference]: Start difference. First operand has 247 places, 221 transitions, 613 flow. Second operand 8 states and 1588 transitions. [2021-12-17 22:48:25,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 229 transitions, 763 flow [2021-12-17 22:48:25,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 229 transitions, 748 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-12-17 22:48:25,975 INFO L242 Difference]: Finished difference. Result has 248 places, 214 transitions, 563 flow [2021-12-17 22:48:25,975 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=563, PETRI_PLACES=248, PETRI_TRANSITIONS=214} [2021-12-17 22:48:25,975 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 31 predicate places. [2021-12-17 22:48:25,976 INFO L470 AbstractCegarLoop]: Abstraction has has 248 places, 214 transitions, 563 flow [2021-12-17 22:48:25,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:25,976 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:25,976 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:25,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-17 22:48:25,976 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:25,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:25,977 INFO L85 PathProgramCache]: Analyzing trace with hash 506138029, now seen corresponding path program 1 times [2021-12-17 22:48:25,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:25,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347216540] [2021-12-17 22:48:25,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:25,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:48:26,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:26,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347216540] [2021-12-17 22:48:26,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347216540] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:48:26,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046337555] [2021-12-17 22:48:26,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:26,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:48:26,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:48:26,110 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) [2021-12-17 22:48:26,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 22:48:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:26,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 22:48:26,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:48:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:48:26,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:48:27,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:48:27,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046337555] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 22:48:27,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 22:48:27,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2021-12-17 22:48:27,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368616813] [2021-12-17 22:48:27,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:48:27,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 22:48:27,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:27,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 22:48:27,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-12-17 22:48:27,132 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 246 [2021-12-17 22:48:27,133 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 214 transitions, 563 flow. Second operand has 11 states, 11 states have (on average 192.45454545454547) internal successors, (2117), 11 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:27,133 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:27,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 246 [2021-12-17 22:48:27,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:27,369 INFO L129 PetriNetUnfolder]: 103/789 cut-off events. [2021-12-17 22:48:27,369 INFO L130 PetriNetUnfolder]: For 353/374 co-relation queries the response was YES. [2021-12-17 22:48:27,371 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 789 events. 103/789 cut-off events. For 353/374 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3919 event pairs, 44 based on Foata normal form. 23/760 useless extension candidates. Maximal degree in co-relation 1318. Up to 115 conditions per place. [2021-12-17 22:48:27,372 INFO L132 encePairwiseOnDemand]: 232/246 looper letters, 49 selfloop transitions, 13 changer transitions 0/224 dead transitions. [2021-12-17 22:48:27,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 224 transitions, 737 flow [2021-12-17 22:48:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 22:48:27,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-17 22:48:27,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2513 transitions. [2021-12-17 22:48:27,375 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7858036272670419 [2021-12-17 22:48:27,376 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2513 transitions. [2021-12-17 22:48:27,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2513 transitions. [2021-12-17 22:48:27,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:27,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2513 transitions. [2021-12-17 22:48:27,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 193.30769230769232) internal successors, (2513), 13 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:27,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:27,381 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:27,382 INFO L186 Difference]: Start difference. First operand has 248 places, 214 transitions, 563 flow. Second operand 13 states and 2513 transitions. [2021-12-17 22:48:27,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 224 transitions, 737 flow [2021-12-17 22:48:27,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 224 transitions, 704 flow, removed 8 selfloop flow, removed 10 redundant places. [2021-12-17 22:48:27,387 INFO L242 Difference]: Finished difference. Result has 246 places, 215 transitions, 576 flow [2021-12-17 22:48:27,387 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=576, PETRI_PLACES=246, PETRI_TRANSITIONS=215} [2021-12-17 22:48:27,387 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 29 predicate places. [2021-12-17 22:48:27,388 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 215 transitions, 576 flow [2021-12-17 22:48:27,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 192.45454545454547) internal successors, (2117), 11 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:27,388 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:27,388 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:27,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-17 22:48:27,601 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,SelfDestructingSolverStorable28 [2021-12-17 22:48:27,601 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:27,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:27,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1333987860, now seen corresponding path program 1 times [2021-12-17 22:48:27,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:27,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463174377] [2021-12-17 22:48:27,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:27,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:27,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:48:27,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:27,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463174377] [2021-12-17 22:48:27,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463174377] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:48:27,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019736982] [2021-12-17 22:48:27,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:27,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:48:27,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:48:27,970 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) [2021-12-17 22:48:27,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 22:48:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:28,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-17 22:48:28,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:48:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:48:29,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:48:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:48:30,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019736982] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:48:30,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:48:30,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 46 [2021-12-17 22:48:30,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127392814] [2021-12-17 22:48:30,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:48:30,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-17 22:48:30,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:30,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-17 22:48:30,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1784, Unknown=0, NotChecked=0, Total=2070 [2021-12-17 22:48:30,360 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 246 [2021-12-17 22:48:30,364 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 215 transitions, 576 flow. Second operand has 46 states, 46 states have (on average 153.3695652173913) internal successors, (7055), 46 states have internal predecessors, (7055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:30,364 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:30,364 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 246 [2021-12-17 22:48:30,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:32,356 INFO L129 PetriNetUnfolder]: 421/2591 cut-off events. [2021-12-17 22:48:32,356 INFO L130 PetriNetUnfolder]: For 1107/1224 co-relation queries the response was YES. [2021-12-17 22:48:32,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4884 conditions, 2591 events. 421/2591 cut-off events. For 1107/1224 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 21363 event pairs, 226 based on Foata normal form. 116/2520 useless extension candidates. Maximal degree in co-relation 4858. Up to 284 conditions per place. [2021-12-17 22:48:32,365 INFO L132 encePairwiseOnDemand]: 222/246 looper letters, 225 selfloop transitions, 38 changer transitions 30/423 dead transitions. [2021-12-17 22:48:32,365 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 423 transitions, 1811 flow [2021-12-17 22:48:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 22:48:32,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 22:48:32,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5670 transitions. [2021-12-17 22:48:32,371 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2021-12-17 22:48:32,371 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5670 transitions. [2021-12-17 22:48:32,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5670 transitions. [2021-12-17 22:48:32,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:32,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5670 transitions. [2021-12-17 22:48:32,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 157.5) internal successors, (5670), 36 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:32,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 246.0) internal successors, (9102), 37 states have internal predecessors, (9102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:32,394 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 246.0) internal successors, (9102), 37 states have internal predecessors, (9102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:32,394 INFO L186 Difference]: Start difference. First operand has 246 places, 215 transitions, 576 flow. Second operand 36 states and 5670 transitions. [2021-12-17 22:48:32,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 423 transitions, 1811 flow [2021-12-17 22:48:32,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 423 transitions, 1771 flow, removed 0 selfloop flow, removed 11 redundant places. [2021-12-17 22:48:32,404 INFO L242 Difference]: Finished difference. Result has 286 places, 239 transitions, 805 flow [2021-12-17 22:48:32,404 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=805, PETRI_PLACES=286, PETRI_TRANSITIONS=239} [2021-12-17 22:48:32,405 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 69 predicate places. [2021-12-17 22:48:32,405 INFO L470 AbstractCegarLoop]: Abstraction has has 286 places, 239 transitions, 805 flow [2021-12-17 22:48:32,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 153.3695652173913) internal successors, (7055), 46 states have internal predecessors, (7055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:32,406 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:32,406 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:32,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 22:48:32,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:48:32,620 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:32,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:32,620 INFO L85 PathProgramCache]: Analyzing trace with hash 442798214, now seen corresponding path program 1 times [2021-12-17 22:48:32,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:32,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140966815] [2021-12-17 22:48:32,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:32,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:48:33,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:33,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140966815] [2021-12-17 22:48:33,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140966815] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:48:33,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42643378] [2021-12-17 22:48:33,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:33,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:48:33,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:48:33,046 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) [2021-12-17 22:48:33,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 22:48:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:33,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-17 22:48:33,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:48:33,581 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-17 22:48:33,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-12-17 22:48:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:48:33,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:48:33,850 INFO L354 Elim1Store]: treesize reduction 56, result has 48.6 percent of original size [2021-12-17 22:48:33,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2021-12-17 22:48:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:48:34,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42643378] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:48:34,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:48:34,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 9] total 29 [2021-12-17 22:48:34,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078052221] [2021-12-17 22:48:34,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:48:34,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-17 22:48:34,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:34,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-17 22:48:34,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-12-17 22:48:34,031 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 246 [2021-12-17 22:48:34,034 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 239 transitions, 805 flow. Second operand has 29 states, 29 states have (on average 174.31034482758622) internal successors, (5055), 29 states have internal predecessors, (5055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:34,034 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:34,034 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 246 [2021-12-17 22:48:34,034 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:38,187 INFO L129 PetriNetUnfolder]: 9406/24737 cut-off events. [2021-12-17 22:48:38,188 INFO L130 PetriNetUnfolder]: For 8471/8552 co-relation queries the response was YES. [2021-12-17 22:48:38,382 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48767 conditions, 24737 events. 9406/24737 cut-off events. For 8471/8552 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 276819 event pairs, 2123 based on Foata normal form. 2/23396 useless extension candidates. Maximal degree in co-relation 48725. Up to 4318 conditions per place. [2021-12-17 22:48:38,485 INFO L132 encePairwiseOnDemand]: 215/246 looper letters, 304 selfloop transitions, 93 changer transitions 0/568 dead transitions. [2021-12-17 22:48:38,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 568 transitions, 2484 flow [2021-12-17 22:48:38,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 22:48:38,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 22:48:38,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 6370 transitions. [2021-12-17 22:48:38,509 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7398373983739838 [2021-12-17 22:48:38,510 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 6370 transitions. [2021-12-17 22:48:38,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 6370 transitions. [2021-12-17 22:48:38,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:38,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 6370 transitions. [2021-12-17 22:48:38,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 182.0) internal successors, (6370), 35 states have internal predecessors, (6370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:38,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 246.0) internal successors, (8856), 36 states have internal predecessors, (8856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:38,544 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 246.0) internal successors, (8856), 36 states have internal predecessors, (8856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:38,544 INFO L186 Difference]: Start difference. First operand has 286 places, 239 transitions, 805 flow. Second operand 35 states and 6370 transitions. [2021-12-17 22:48:38,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 568 transitions, 2484 flow [2021-12-17 22:48:38,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 568 transitions, 2445 flow, removed 11 selfloop flow, removed 11 redundant places. [2021-12-17 22:48:38,621 INFO L242 Difference]: Finished difference. Result has 328 places, 313 transitions, 1458 flow [2021-12-17 22:48:38,622 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1458, PETRI_PLACES=328, PETRI_TRANSITIONS=313} [2021-12-17 22:48:38,622 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 111 predicate places. [2021-12-17 22:48:38,622 INFO L470 AbstractCegarLoop]: Abstraction has has 328 places, 313 transitions, 1458 flow [2021-12-17 22:48:38,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 174.31034482758622) internal successors, (5055), 29 states have internal predecessors, (5055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:38,623 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:38,624 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:38,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-17 22:48:38,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:48:38,848 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:38,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:38,849 INFO L85 PathProgramCache]: Analyzing trace with hash 687785676, now seen corresponding path program 2 times [2021-12-17 22:48:38,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:38,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989712820] [2021-12-17 22:48:38,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:38,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:39,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:48:39,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:39,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989712820] [2021-12-17 22:48:39,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989712820] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:48:39,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288752626] [2021-12-17 22:48:39,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 22:48:39,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:48:39,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:48:39,260 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) [2021-12-17 22:48:39,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 22:48:39,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 22:48:39,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:48:39,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-17 22:48:39,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:48:39,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:48:39,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 22:48:39,849 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-17 22:48:39,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-17 22:48:39,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:48:40,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:48:40,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:48:40,532 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-17 22:48:40,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 23 [2021-12-17 22:48:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:40,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:48:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:48:41,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288752626] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:48:41,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:48:41,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 28, 12] total 55 [2021-12-17 22:48:41,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12292216] [2021-12-17 22:48:41,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:48:41,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-17 22:48:41,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:41,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-17 22:48:41,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2731, Unknown=0, NotChecked=0, Total=2970 [2021-12-17 22:48:41,165 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 246 [2021-12-17 22:48:41,197 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 313 transitions, 1458 flow. Second operand has 55 states, 55 states have (on average 150.27272727272728) internal successors, (8265), 55 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:41,197 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:41,197 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 246 [2021-12-17 22:48:41,197 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:48:52,770 INFO L129 PetriNetUnfolder]: 18611/47105 cut-off events. [2021-12-17 22:48:52,770 INFO L130 PetriNetUnfolder]: For 62325/62510 co-relation queries the response was YES. [2021-12-17 22:48:53,217 INFO L84 FinitePrefix]: Finished finitePrefix Result has 122129 conditions, 47105 events. 18611/47105 cut-off events. For 62325/62510 co-relation queries the response was YES. Maximal size of possible extension queue 1576. Compared 561695 event pairs, 760 based on Foata normal form. 148/45949 useless extension candidates. Maximal degree in co-relation 122068. Up to 12600 conditions per place. [2021-12-17 22:48:53,372 INFO L132 encePairwiseOnDemand]: 204/246 looper letters, 440 selfloop transitions, 191 changer transitions 0/764 dead transitions. [2021-12-17 22:48:53,372 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 764 transitions, 5219 flow [2021-12-17 22:48:53,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-17 22:48:53,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-12-17 22:48:53,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 7927 transitions. [2021-12-17 22:48:53,384 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6318348477602423 [2021-12-17 22:48:53,384 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 7927 transitions. [2021-12-17 22:48:53,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 7927 transitions. [2021-12-17 22:48:53,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:48:53,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 7927 transitions. [2021-12-17 22:48:53,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 155.4313725490196) internal successors, (7927), 51 states have internal predecessors, (7927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:53,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 246.0) internal successors, (12792), 52 states have internal predecessors, (12792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:53,409 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 246.0) internal successors, (12792), 52 states have internal predecessors, (12792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:53,410 INFO L186 Difference]: Start difference. First operand has 328 places, 313 transitions, 1458 flow. Second operand 51 states and 7927 transitions. [2021-12-17 22:48:53,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 764 transitions, 5219 flow [2021-12-17 22:48:54,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 764 transitions, 5192 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-12-17 22:48:54,086 INFO L242 Difference]: Finished difference. Result has 399 places, 451 transitions, 3300 flow [2021-12-17 22:48:54,086 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=1431, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=3300, PETRI_PLACES=399, PETRI_TRANSITIONS=451} [2021-12-17 22:48:54,087 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 182 predicate places. [2021-12-17 22:48:54,087 INFO L470 AbstractCegarLoop]: Abstraction has has 399 places, 451 transitions, 3300 flow [2021-12-17 22:48:54,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 150.27272727272728) internal successors, (8265), 55 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:54,088 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:48:54,089 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:48:54,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 22:48:54,387 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,SelfDestructingSolverStorable31 [2021-12-17 22:48:54,387 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:48:54,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:48:54,388 INFO L85 PathProgramCache]: Analyzing trace with hash 792877422, now seen corresponding path program 1 times [2021-12-17 22:48:54,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:48:54,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235655153] [2021-12-17 22:48:54,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:54,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:48:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:48:54,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:48:54,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235655153] [2021-12-17 22:48:54,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235655153] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:48:54,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184294324] [2021-12-17 22:48:54,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:48:54,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:48:54,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:48:54,726 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) [2021-12-17 22:48:54,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 22:48:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:48:54,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-17 22:48:54,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:48:54,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:48:55,020 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-17 22:48:55,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-17 22:48:55,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 22:48:55,444 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-17 22:48:55,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-17 22:48:55,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:48:55,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:48:55,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:48:56,056 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-17 22:48:56,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-12-17 22:48:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:48:56,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:48:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:48:56,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184294324] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:48:56,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:48:56,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25, 9] total 49 [2021-12-17 22:48:56,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138000274] [2021-12-17 22:48:56,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:48:56,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-17 22:48:56,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:48:56,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-17 22:48:56,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2162, Unknown=0, NotChecked=0, Total=2352 [2021-12-17 22:48:56,529 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 246 [2021-12-17 22:48:56,534 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 451 transitions, 3300 flow. Second operand has 49 states, 49 states have (on average 154.44897959183675) internal successors, (7568), 49 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:48:56,535 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:48:56,535 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 246 [2021-12-17 22:48:56,535 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:49:12,029 INFO L129 PetriNetUnfolder]: 24152/60218 cut-off events. [2021-12-17 22:49:12,029 INFO L130 PetriNetUnfolder]: For 260007/261284 co-relation queries the response was YES. [2021-12-17 22:49:13,353 INFO L84 FinitePrefix]: Finished finitePrefix Result has 203821 conditions, 60218 events. 24152/60218 cut-off events. For 260007/261284 co-relation queries the response was YES. Maximal size of possible extension queue 2052. Compared 738349 event pairs, 7057 based on Foata normal form. 381/59679 useless extension candidates. Maximal degree in co-relation 203731. Up to 8243 conditions per place. [2021-12-17 22:49:13,571 INFO L132 encePairwiseOnDemand]: 207/246 looper letters, 549 selfloop transitions, 307 changer transitions 0/1006 dead transitions. [2021-12-17 22:49:13,571 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 1006 transitions, 9832 flow [2021-12-17 22:49:13,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-17 22:49:13,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-12-17 22:49:13,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 7681 transitions. [2021-12-17 22:49:13,579 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6504911924119241 [2021-12-17 22:49:13,579 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 7681 transitions. [2021-12-17 22:49:13,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 7681 transitions. [2021-12-17 22:49:13,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:49:13,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 7681 transitions. [2021-12-17 22:49:13,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 160.02083333333334) internal successors, (7681), 48 states have internal predecessors, (7681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:13,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 246.0) internal successors, (12054), 49 states have internal predecessors, (12054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:13,598 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 246.0) internal successors, (12054), 49 states have internal predecessors, (12054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:13,599 INFO L186 Difference]: Start difference. First operand has 399 places, 451 transitions, 3300 flow. Second operand 48 states and 7681 transitions. [2021-12-17 22:49:13,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 1006 transitions, 9832 flow [2021-12-17 22:49:15,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 1006 transitions, 9351 flow, removed 149 selfloop flow, removed 21 redundant places. [2021-12-17 22:49:15,979 INFO L242 Difference]: Finished difference. Result has 445 places, 627 transitions, 6138 flow [2021-12-17 22:49:15,980 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=3054, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=6138, PETRI_PLACES=445, PETRI_TRANSITIONS=627} [2021-12-17 22:49:15,980 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 228 predicate places. [2021-12-17 22:49:15,980 INFO L470 AbstractCegarLoop]: Abstraction has has 445 places, 627 transitions, 6138 flow [2021-12-17 22:49:15,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 154.44897959183675) internal successors, (7568), 49 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:15,982 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:49:15,982 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:49:16,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 22:49:16,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:49:16,195 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:49:16,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:49:16,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1893993598, now seen corresponding path program 3 times [2021-12-17 22:49:16,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:49:16,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824743692] [2021-12-17 22:49:16,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:49:16,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:49:16,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:49:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:49:16,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:49:16,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824743692] [2021-12-17 22:49:16,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824743692] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:49:16,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:49:16,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 22:49:16,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895108774] [2021-12-17 22:49:16,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:49:16,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 22:49:16,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:49:16,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 22:49:16,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-12-17 22:49:16,533 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 246 [2021-12-17 22:49:16,535 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 627 transitions, 6138 flow. Second operand has 20 states, 20 states have (on average 173.6) internal successors, (3472), 20 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:16,535 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:49:16,535 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 246 [2021-12-17 22:49:16,535 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand