./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test-easy11.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/test-easy11.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 a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 03:09:39,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:09:39,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:09:39,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:09:39,130 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:09:39,131 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:09:39,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:09:39,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:09:39,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:09:39,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:09:39,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:09:39,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:09:39,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:09:39,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:09:39,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:09:39,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:09:39,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:09:39,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:09:39,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:09:39,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:09:39,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:09:39,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:09:39,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:09:39,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:09:39,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:09:39,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:09:39,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:09:39,169 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:09:39,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:09:39,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:09:39,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:09:39,171 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:09:39,172 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:09:39,173 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:09:39,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:09:39,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:09:39,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:09:39,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:09:39,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:09:39,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:09:39,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:09:39,179 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 03:09:39,214 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:09:39,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:09:39,217 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:09:39,217 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:09:39,218 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:09:39,218 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:09:39,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:09:39,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:09:39,219 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:09:39,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:09:39,220 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 03:09:39,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:09:39,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 03:09:39,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:09:39,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:09:39,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:09:39,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:09:39,222 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 03:09:39,222 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:09:39,222 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:09:39,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:09:39,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:09:39,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:09:39,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:09:39,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:09:39,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:09:39,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:09:39,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:09:39,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:09:39,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:09:39,224 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:09:39,224 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:09:39,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:09:39,225 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:09:39,225 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 [2021-12-16 03:09:39,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:09:39,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:09:39,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:09:39,502 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:09:39,503 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:09:39,504 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-easy11.wvr.c [2021-12-16 03:09:39,563 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0a5bd156/8084deb93af348aba9c50a28af4e30dd/FLAGb06bd5cab [2021-12-16 03:09:39,995 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:09:39,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-easy11.wvr.c [2021-12-16 03:09:40,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0a5bd156/8084deb93af348aba9c50a28af4e30dd/FLAGb06bd5cab [2021-12-16 03:09:40,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0a5bd156/8084deb93af348aba9c50a28af4e30dd [2021-12-16 03:09:40,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:09:40,026 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:09:40,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:09:40,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:09:40,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:09:40,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:09:40" (1/1) ... [2021-12-16 03:09:40,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58a537cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:40, skipping insertion in model container [2021-12-16 03:09:40,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:09:40" (1/1) ... [2021-12-16 03:09:40,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:09:40,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:09:40,256 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/test-easy11.wvr.c[2005,2018] [2021-12-16 03:09:40,259 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:09:40,267 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:09:40,295 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/test-easy11.wvr.c[2005,2018] [2021-12-16 03:09:40,302 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:09:40,314 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:09:40,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:40 WrapperNode [2021-12-16 03:09:40,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:09:40,316 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:09:40,317 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:09:40,317 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:09:40,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:40" (1/1) ... [2021-12-16 03:09:40,331 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:40" (1/1) ... [2021-12-16 03:09:40,349 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2021-12-16 03:09:40,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:09:40,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:09:40,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:09:40,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:09:40,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:40" (1/1) ... [2021-12-16 03:09:40,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:40" (1/1) ... [2021-12-16 03:09:40,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:40" (1/1) ... [2021-12-16 03:09:40,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:40" (1/1) ... [2021-12-16 03:09:40,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:40" (1/1) ... [2021-12-16 03:09:40,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:40" (1/1) ... [2021-12-16 03:09:40,388 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:40" (1/1) ... [2021-12-16 03:09:40,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:09:40,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:09:40,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:09:40,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:09:40,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:40" (1/1) ... [2021-12-16 03:09:40,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:09:40,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:09:40,428 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) [2021-12-16 03:09:40,454 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 [2021-12-16 03:09:40,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:09:40,471 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-16 03:09:40,471 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-16 03:09:40,471 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-16 03:09:40,471 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-16 03:09:40,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:09:40,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:09:40,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 03:09:40,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-16 03:09:40,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-16 03:09:40,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:09:40,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:09:40,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 03:09:40,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:09:40,474 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-16 03:09:40,556 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:09:40,558 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:09:40,757 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:09:40,763 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:09:40,764 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 03:09:40,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:09:40 BoogieIcfgContainer [2021-12-16 03:09:40,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:09:40,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:09:40,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:09:40,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:09:40,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:09:40" (1/3) ... [2021-12-16 03:09:40,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@745390fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:09:40, skipping insertion in model container [2021-12-16 03:09:40,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:40" (2/3) ... [2021-12-16 03:09:40,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@745390fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:09:40, skipping insertion in model container [2021-12-16 03:09:40,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:09:40" (3/3) ... [2021-12-16 03:09:40,774 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2021-12-16 03:09:40,778 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-16 03:09:40,778 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:09:40,778 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:09:40,779 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-16 03:09:40,819 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,820 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,820 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,820 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,820 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,821 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,821 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,825 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,825 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,825 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,826 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,826 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,826 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,827 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,828 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,828 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,829 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,829 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,829 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,830 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,830 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,830 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,831 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,832 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,833 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,833 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,834 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,834 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,835 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,835 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,836 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,836 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,836 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,836 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,837 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,837 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,838 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,838 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,838 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,839 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,840 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,840 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,840 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,841 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,841 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,841 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,842 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,842 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,844 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,845 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,845 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,845 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,850 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,850 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,851 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,851 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:40,854 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-16 03:09:40,901 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:09:40,911 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 [2021-12-16 03:09:40,912 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-16 03:09:40,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2021-12-16 03:09:40,982 INFO L129 PetriNetUnfolder]: 6/85 cut-off events. [2021-12-16 03:09:40,983 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-16 03:09:40,986 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2021-12-16 03:09:40,986 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2021-12-16 03:09:40,991 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2021-12-16 03:09:41,010 INFO L129 PetriNetUnfolder]: 6/75 cut-off events. [2021-12-16 03:09:41,011 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-16 03:09:41,013 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:41,014 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] [2021-12-16 03:09:41,015 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:41,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:41,021 INFO L85 PathProgramCache]: Analyzing trace with hash -384738625, now seen corresponding path program 1 times [2021-12-16 03:09:41,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:41,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766623897] [2021-12-16 03:09:41,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:41,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:41,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:41,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766623897] [2021-12-16 03:09:41,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766623897] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:41,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:41,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 03:09:41,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923705352] [2021-12-16 03:09:41,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:41,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 03:09:41,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:41,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 03:09:41,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 03:09:41,264 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 87 [2021-12-16 03:09:41,271 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:41,271 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:41,272 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 87 [2021-12-16 03:09:41,273 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:41,321 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2021-12-16 03:09:41,322 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-16 03:09:41,322 INFO L84 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 72 events. 2/72 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 6/74 useless extension candidates. Maximal degree in co-relation 48. Up to 5 conditions per place. [2021-12-16 03:09:41,324 INFO L132 encePairwiseOnDemand]: 83/87 looper letters, 4 selfloop transitions, 0 changer transitions 2/72 dead transitions. [2021-12-16 03:09:41,324 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 164 flow [2021-12-16 03:09:41,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 03:09:41,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-16 03:09:41,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 164 transitions. [2021-12-16 03:09:41,340 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9425287356321839 [2021-12-16 03:09:41,341 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 164 transitions. [2021-12-16 03:09:41,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 164 transitions. [2021-12-16 03:09:41,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:41,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 164 transitions. [2021-12-16 03:09:41,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 82.0) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:41,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:41,356 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:41,358 INFO L186 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 2 states and 164 transitions. [2021-12-16 03:09:41,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 164 flow [2021-12-16 03:09:41,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 156 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-16 03:09:41,369 INFO L242 Difference]: Finished difference. Result has 74 places, 70 transitions, 144 flow [2021-12-16 03:09:41,370 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2021-12-16 03:09:41,375 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, -3 predicate places. [2021-12-16 03:09:41,375 INFO L470 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 144 flow [2021-12-16 03:09:41,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:41,376 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:41,376 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] [2021-12-16 03:09:41,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 03:09:41,377 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:41,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:41,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1457758209, now seen corresponding path program 1 times [2021-12-16 03:09:41,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:41,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34661216] [2021-12-16 03:09:41,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:41,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:41,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:41,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34661216] [2021-12-16 03:09:41,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34661216] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:41,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:41,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-16 03:09:41,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634317727] [2021-12-16 03:09:41,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:41,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 03:09:41,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:41,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 03:09:41,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-16 03:09:41,939 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-16 03:09:41,940 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 144 flow. Second operand has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:41,940 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:41,940 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-16 03:09:41,940 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:42,261 INFO L129 PetriNetUnfolder]: 108/359 cut-off events. [2021-12-16 03:09:42,262 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2021-12-16 03:09:42,263 INFO L84 FinitePrefix]: Finished finitePrefix Result has 603 conditions, 359 events. 108/359 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1655 event pairs, 27 based on Foata normal form. 1/325 useless extension candidates. Maximal degree in co-relation 600. Up to 57 conditions per place. [2021-12-16 03:09:42,265 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 60 selfloop transitions, 16 changer transitions 8/125 dead transitions. [2021-12-16 03:09:42,265 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 125 transitions, 431 flow [2021-12-16 03:09:42,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:09:42,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-16 03:09:42,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 799 transitions. [2021-12-16 03:09:42,273 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6559934318555009 [2021-12-16 03:09:42,273 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 799 transitions. [2021-12-16 03:09:42,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 799 transitions. [2021-12-16 03:09:42,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:42,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 799 transitions. [2021-12-16 03:09:42,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 57.07142857142857) internal successors, (799), 14 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:42,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:42,282 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:42,282 INFO L186 Difference]: Start difference. First operand has 74 places, 70 transitions, 144 flow. Second operand 14 states and 799 transitions. [2021-12-16 03:09:42,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 125 transitions, 431 flow [2021-12-16 03:09:42,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 125 transitions, 431 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-16 03:09:42,287 INFO L242 Difference]: Finished difference. Result has 92 places, 82 transitions, 241 flow [2021-12-16 03:09:42,288 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=241, PETRI_PLACES=92, PETRI_TRANSITIONS=82} [2021-12-16 03:09:42,288 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 15 predicate places. [2021-12-16 03:09:42,289 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 82 transitions, 241 flow [2021-12-16 03:09:42,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:42,290 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:42,290 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] [2021-12-16 03:09:42,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 03:09:42,290 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:42,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:42,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1178946693, now seen corresponding path program 2 times [2021-12-16 03:09:42,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:42,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013770656] [2021-12-16 03:09:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:42,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:42,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:42,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013770656] [2021-12-16 03:09:42,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013770656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:42,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:42,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-16 03:09:42,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690642205] [2021-12-16 03:09:42,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:42,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 03:09:42,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:42,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 03:09:42,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-16 03:09:42,584 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-16 03:09:42,585 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 82 transitions, 241 flow. Second operand has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:42,585 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:42,585 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-16 03:09:42,585 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:42,920 INFO L129 PetriNetUnfolder]: 132/404 cut-off events. [2021-12-16 03:09:42,921 INFO L130 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2021-12-16 03:09:42,923 INFO L84 FinitePrefix]: Finished finitePrefix Result has 924 conditions, 404 events. 132/404 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1900 event pairs, 26 based on Foata normal form. 1/399 useless extension candidates. Maximal degree in co-relation 913. Up to 103 conditions per place. [2021-12-16 03:09:42,925 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 53 selfloop transitions, 23 changer transitions 8/125 dead transitions. [2021-12-16 03:09:42,925 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 125 transitions, 561 flow [2021-12-16 03:09:42,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:09:42,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-16 03:09:42,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2021-12-16 03:09:42,928 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2021-12-16 03:09:42,928 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2021-12-16 03:09:42,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2021-12-16 03:09:42,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:42,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2021-12-16 03:09:42,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:42,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:42,933 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:42,934 INFO L186 Difference]: Start difference. First operand has 92 places, 82 transitions, 241 flow. Second operand 14 states and 794 transitions. [2021-12-16 03:09:42,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 125 transitions, 561 flow [2021-12-16 03:09:42,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 125 transitions, 545 flow, removed 5 selfloop flow, removed 6 redundant places. [2021-12-16 03:09:42,939 INFO L242 Difference]: Finished difference. Result has 102 places, 93 transitions, 362 flow [2021-12-16 03:09:42,939 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=362, PETRI_PLACES=102, PETRI_TRANSITIONS=93} [2021-12-16 03:09:42,940 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 25 predicate places. [2021-12-16 03:09:42,940 INFO L470 AbstractCegarLoop]: Abstraction has has 102 places, 93 transitions, 362 flow [2021-12-16 03:09:42,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:42,941 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:42,941 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] [2021-12-16 03:09:42,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 03:09:42,942 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:42,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:42,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1133456201, now seen corresponding path program 3 times [2021-12-16 03:09:42,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:42,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977892039] [2021-12-16 03:09:42,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:42,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:43,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:43,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977892039] [2021-12-16 03:09:43,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977892039] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:43,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:43,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 03:09:43,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248372289] [2021-12-16 03:09:43,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:43,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:09:43,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:43,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:09:43,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:09:43,190 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-16 03:09:43,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 93 transitions, 362 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:43,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:43,191 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-16 03:09:43,191 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:43,533 INFO L129 PetriNetUnfolder]: 162/447 cut-off events. [2021-12-16 03:09:43,534 INFO L130 PetriNetUnfolder]: For 505/505 co-relation queries the response was YES. [2021-12-16 03:09:43,536 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 447 events. 162/447 cut-off events. For 505/505 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2039 event pairs, 36 based on Foata normal form. 1/439 useless extension candidates. Maximal degree in co-relation 1268. Up to 125 conditions per place. [2021-12-16 03:09:43,540 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 61 selfloop transitions, 33 changer transitions 8/143 dead transitions. [2021-12-16 03:09:43,540 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 143 transitions, 828 flow [2021-12-16 03:09:43,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:09:43,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-16 03:09:43,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2021-12-16 03:09:43,543 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2021-12-16 03:09:43,543 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2021-12-16 03:09:43,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2021-12-16 03:09:43,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:43,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2021-12-16 03:09:43,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:43,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:43,548 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:43,548 INFO L186 Difference]: Start difference. First operand has 102 places, 93 transitions, 362 flow. Second operand 14 states and 790 transitions. [2021-12-16 03:09:43,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 143 transitions, 828 flow [2021-12-16 03:09:43,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 143 transitions, 763 flow, removed 10 selfloop flow, removed 9 redundant places. [2021-12-16 03:09:43,559 INFO L242 Difference]: Finished difference. Result has 110 places, 109 transitions, 547 flow [2021-12-16 03:09:43,560 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=547, PETRI_PLACES=110, PETRI_TRANSITIONS=109} [2021-12-16 03:09:43,561 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 33 predicate places. [2021-12-16 03:09:43,561 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 109 transitions, 547 flow [2021-12-16 03:09:43,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:43,562 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:43,562 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] [2021-12-16 03:09:43,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 03:09:43,563 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:43,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:43,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1530516955, now seen corresponding path program 4 times [2021-12-16 03:09:43,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:43,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753468742] [2021-12-16 03:09:43,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:43,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:43,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:43,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:43,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:43,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753468742] [2021-12-16 03:09:43,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753468742] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:43,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:43,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 03:09:43,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434309834] [2021-12-16 03:09:43,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:43,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:09:43,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:43,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:09:43,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:09:43,798 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-16 03:09:43,799 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 109 transitions, 547 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:43,799 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:43,800 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-16 03:09:43,800 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:44,144 INFO L129 PetriNetUnfolder]: 166/455 cut-off events. [2021-12-16 03:09:44,144 INFO L130 PetriNetUnfolder]: For 798/800 co-relation queries the response was YES. [2021-12-16 03:09:44,147 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1509 conditions, 455 events. 166/455 cut-off events. For 798/800 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2135 event pairs, 36 based on Foata normal form. 3/454 useless extension candidates. Maximal degree in co-relation 1489. Up to 129 conditions per place. [2021-12-16 03:09:44,149 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 64 selfloop transitions, 38 changer transitions 8/151 dead transitions. [2021-12-16 03:09:44,150 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 151 transitions, 999 flow [2021-12-16 03:09:44,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:09:44,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-16 03:09:44,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2021-12-16 03:09:44,152 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2021-12-16 03:09:44,152 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2021-12-16 03:09:44,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2021-12-16 03:09:44,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:44,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2021-12-16 03:09:44,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:44,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:44,157 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:44,157 INFO L186 Difference]: Start difference. First operand has 110 places, 109 transitions, 547 flow. Second operand 14 states and 792 transitions. [2021-12-16 03:09:44,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 151 transitions, 999 flow [2021-12-16 03:09:44,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 151 transitions, 930 flow, removed 20 selfloop flow, removed 8 redundant places. [2021-12-16 03:09:44,165 INFO L242 Difference]: Finished difference. Result has 117 places, 114 transitions, 657 flow [2021-12-16 03:09:44,165 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=657, PETRI_PLACES=117, PETRI_TRANSITIONS=114} [2021-12-16 03:09:44,166 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 40 predicate places. [2021-12-16 03:09:44,166 INFO L470 AbstractCegarLoop]: Abstraction has has 117 places, 114 transitions, 657 flow [2021-12-16 03:09:44,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:44,166 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:44,167 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] [2021-12-16 03:09:44,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 03:09:44,167 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:44,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:44,168 INFO L85 PathProgramCache]: Analyzing trace with hash -436474655, now seen corresponding path program 5 times [2021-12-16 03:09:44,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:44,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017364212] [2021-12-16 03:09:44,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:44,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:44,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:44,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017364212] [2021-12-16 03:09:44,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017364212] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:44,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:44,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 03:09:44,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678564336] [2021-12-16 03:09:44,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:44,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:09:44,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:44,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:09:44,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:09:44,373 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-16 03:09:44,374 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 114 transitions, 657 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:44,374 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:44,374 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-16 03:09:44,374 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:44,773 INFO L129 PetriNetUnfolder]: 181/476 cut-off events. [2021-12-16 03:09:44,773 INFO L130 PetriNetUnfolder]: For 1155/1157 co-relation queries the response was YES. [2021-12-16 03:09:44,775 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1676 conditions, 476 events. 181/476 cut-off events. For 1155/1157 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2209 event pairs, 36 based on Foata normal form. 3/470 useless extension candidates. Maximal degree in co-relation 1654. Up to 134 conditions per place. [2021-12-16 03:09:44,778 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 62 selfloop transitions, 43 changer transitions 7/153 dead transitions. [2021-12-16 03:09:44,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 153 transitions, 1116 flow [2021-12-16 03:09:44,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:09:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-16 03:09:44,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2021-12-16 03:09:44,781 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2021-12-16 03:09:44,781 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2021-12-16 03:09:44,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2021-12-16 03:09:44,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:44,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2021-12-16 03:09:44,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:44,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:44,786 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:44,786 INFO L186 Difference]: Start difference. First operand has 117 places, 114 transitions, 657 flow. Second operand 14 states and 793 transitions. [2021-12-16 03:09:44,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 153 transitions, 1116 flow [2021-12-16 03:09:44,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 153 transitions, 1010 flow, removed 6 selfloop flow, removed 11 redundant places. [2021-12-16 03:09:44,796 INFO L242 Difference]: Finished difference. Result has 122 places, 123 transitions, 807 flow [2021-12-16 03:09:44,796 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=807, PETRI_PLACES=122, PETRI_TRANSITIONS=123} [2021-12-16 03:09:44,799 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 45 predicate places. [2021-12-16 03:09:44,799 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 123 transitions, 807 flow [2021-12-16 03:09:44,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:44,799 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:44,800 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] [2021-12-16 03:09:44,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 03:09:44,800 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:44,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:44,801 INFO L85 PathProgramCache]: Analyzing trace with hash 959930283, now seen corresponding path program 6 times [2021-12-16 03:09:44,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:44,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899204598] [2021-12-16 03:09:44,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:44,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:45,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:45,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899204598] [2021-12-16 03:09:45,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899204598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:45,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:45,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 03:09:45,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414779088] [2021-12-16 03:09:45,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:45,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:09:45,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:45,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:09:45,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:09:45,030 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-16 03:09:45,030 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 123 transitions, 807 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:45,030 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:45,030 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-16 03:09:45,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:45,328 INFO L129 PetriNetUnfolder]: 180/479 cut-off events. [2021-12-16 03:09:45,328 INFO L130 PetriNetUnfolder]: For 1424/1428 co-relation queries the response was YES. [2021-12-16 03:09:45,331 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1781 conditions, 479 events. 180/479 cut-off events. For 1424/1428 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2280 event pairs, 34 based on Foata normal form. 3/477 useless extension candidates. Maximal degree in co-relation 1756. Up to 133 conditions per place. [2021-12-16 03:09:45,345 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 67 selfloop transitions, 43 changer transitions 8/159 dead transitions. [2021-12-16 03:09:45,345 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 159 transitions, 1234 flow [2021-12-16 03:09:45,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:09:45,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-16 03:09:45,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2021-12-16 03:09:45,348 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2021-12-16 03:09:45,348 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2021-12-16 03:09:45,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2021-12-16 03:09:45,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:45,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2021-12-16 03:09:45,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:45,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:45,353 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:45,353 INFO L186 Difference]: Start difference. First operand has 122 places, 123 transitions, 807 flow. Second operand 14 states and 790 transitions. [2021-12-16 03:09:45,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 159 transitions, 1234 flow [2021-12-16 03:09:45,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 159 transitions, 1155 flow, removed 14 selfloop flow, removed 9 redundant places. [2021-12-16 03:09:45,361 INFO L242 Difference]: Finished difference. Result has 126 places, 121 transitions, 815 flow [2021-12-16 03:09:45,362 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=815, PETRI_PLACES=126, PETRI_TRANSITIONS=121} [2021-12-16 03:09:45,362 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 49 predicate places. [2021-12-16 03:09:45,363 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 121 transitions, 815 flow [2021-12-16 03:09:45,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:45,363 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:45,363 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] [2021-12-16 03:09:45,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 03:09:45,364 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:45,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:45,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1323936813, now seen corresponding path program 7 times [2021-12-16 03:09:45,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:45,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063385049] [2021-12-16 03:09:45,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:45,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:45,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:45,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063385049] [2021-12-16 03:09:45,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063385049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:45,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:45,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-16 03:09:45,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261752162] [2021-12-16 03:09:45,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:45,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 03:09:45,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:45,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 03:09:45,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-16 03:09:45,540 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-16 03:09:45,540 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 121 transitions, 815 flow. Second operand has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:45,541 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:45,541 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-16 03:09:45,541 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:45,849 INFO L129 PetriNetUnfolder]: 180/481 cut-off events. [2021-12-16 03:09:45,849 INFO L130 PetriNetUnfolder]: For 1684/1686 co-relation queries the response was YES. [2021-12-16 03:09:45,851 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1800 conditions, 481 events. 180/481 cut-off events. For 1684/1686 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2276 event pairs, 35 based on Foata normal form. 3/476 useless extension candidates. Maximal degree in co-relation 1775. Up to 132 conditions per place. [2021-12-16 03:09:45,854 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 61 selfloop transitions, 44 changer transitions 8/154 dead transitions. [2021-12-16 03:09:45,855 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 154 transitions, 1197 flow [2021-12-16 03:09:45,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:09:45,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-16 03:09:45,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 795 transitions. [2021-12-16 03:09:45,857 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6527093596059114 [2021-12-16 03:09:45,857 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 795 transitions. [2021-12-16 03:09:45,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 795 transitions. [2021-12-16 03:09:45,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:45,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 795 transitions. [2021-12-16 03:09:45,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.785714285714285) internal successors, (795), 14 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:45,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:45,863 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:45,863 INFO L186 Difference]: Start difference. First operand has 126 places, 121 transitions, 815 flow. Second operand 14 states and 795 transitions. [2021-12-16 03:09:45,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 154 transitions, 1197 flow [2021-12-16 03:09:45,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 154 transitions, 1097 flow, removed 6 selfloop flow, removed 12 redundant places. [2021-12-16 03:09:45,874 INFO L242 Difference]: Finished difference. Result has 127 places, 123 transitions, 863 flow [2021-12-16 03:09:45,875 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=863, PETRI_PLACES=127, PETRI_TRANSITIONS=123} [2021-12-16 03:09:45,877 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 50 predicate places. [2021-12-16 03:09:45,877 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 123 transitions, 863 flow [2021-12-16 03:09:45,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:45,878 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:45,878 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] [2021-12-16 03:09:45,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 03:09:45,879 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:45,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:45,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1458891363, now seen corresponding path program 8 times [2021-12-16 03:09:45,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:45,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015879950] [2021-12-16 03:09:45,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:45,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:46,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:46,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015879950] [2021-12-16 03:09:46,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015879950] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:46,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:46,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 03:09:46,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251072079] [2021-12-16 03:09:46,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:46,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:09:46,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:46,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:09:46,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:09:46,078 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-16 03:09:46,079 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 123 transitions, 863 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:46,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:46,079 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-16 03:09:46,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:46,371 INFO L129 PetriNetUnfolder]: 184/497 cut-off events. [2021-12-16 03:09:46,371 INFO L130 PetriNetUnfolder]: For 1744/1748 co-relation queries the response was YES. [2021-12-16 03:09:46,373 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1868 conditions, 497 events. 184/497 cut-off events. For 1744/1748 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2441 event pairs, 34 based on Foata normal form. 3/495 useless extension candidates. Maximal degree in co-relation 1841. Up to 131 conditions per place. [2021-12-16 03:09:46,376 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 70 selfloop transitions, 44 changer transitions 8/163 dead transitions. [2021-12-16 03:09:46,376 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 163 transitions, 1287 flow [2021-12-16 03:09:46,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:09:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-16 03:09:46,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2021-12-16 03:09:46,381 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2021-12-16 03:09:46,381 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2021-12-16 03:09:46,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2021-12-16 03:09:46,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:46,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2021-12-16 03:09:46,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:46,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:46,386 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:46,387 INFO L186 Difference]: Start difference. First operand has 127 places, 123 transitions, 863 flow. Second operand 14 states and 794 transitions. [2021-12-16 03:09:46,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 163 transitions, 1287 flow [2021-12-16 03:09:46,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 163 transitions, 1195 flow, removed 11 selfloop flow, removed 10 redundant places. [2021-12-16 03:09:46,398 INFO L242 Difference]: Finished difference. Result has 131 places, 124 transitions, 885 flow [2021-12-16 03:09:46,398 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=885, PETRI_PLACES=131, PETRI_TRANSITIONS=124} [2021-12-16 03:09:46,399 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 54 predicate places. [2021-12-16 03:09:46,399 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 124 transitions, 885 flow [2021-12-16 03:09:46,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:46,400 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:46,400 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] [2021-12-16 03:09:46,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 03:09:46,401 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:46,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:46,401 INFO L85 PathProgramCache]: Analyzing trace with hash -465087311, now seen corresponding path program 9 times [2021-12-16 03:09:46,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:46,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785336425] [2021-12-16 03:09:46,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:46,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:46,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:46,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785336425] [2021-12-16 03:09:46,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785336425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:46,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:46,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 03:09:46,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836925200] [2021-12-16 03:09:46,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:46,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:09:46,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:46,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:09:46,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:09:46,592 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-16 03:09:46,593 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 124 transitions, 885 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:46,593 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:46,593 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-16 03:09:46,593 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:46,908 INFO L129 PetriNetUnfolder]: 181/497 cut-off events. [2021-12-16 03:09:46,908 INFO L130 PetriNetUnfolder]: For 1897/1899 co-relation queries the response was YES. [2021-12-16 03:09:46,911 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1885 conditions, 497 events. 181/497 cut-off events. For 1897/1899 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2427 event pairs, 35 based on Foata normal form. 3/492 useless extension candidates. Maximal degree in co-relation 1857. Up to 140 conditions per place. [2021-12-16 03:09:46,914 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 62 selfloop transitions, 42 changer transitions 8/153 dead transitions. [2021-12-16 03:09:46,914 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 153 transitions, 1225 flow [2021-12-16 03:09:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:09:46,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-16 03:09:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2021-12-16 03:09:46,916 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2021-12-16 03:09:46,916 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2021-12-16 03:09:46,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2021-12-16 03:09:46,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:46,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2021-12-16 03:09:46,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:46,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:46,923 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:46,923 INFO L186 Difference]: Start difference. First operand has 131 places, 124 transitions, 885 flow. Second operand 14 states and 793 transitions. [2021-12-16 03:09:46,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 153 transitions, 1225 flow [2021-12-16 03:09:46,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 153 transitions, 1123 flow, removed 8 selfloop flow, removed 12 redundant places. [2021-12-16 03:09:46,934 INFO L242 Difference]: Finished difference. Result has 132 places, 122 transitions, 854 flow [2021-12-16 03:09:46,935 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=854, PETRI_PLACES=132, PETRI_TRANSITIONS=122} [2021-12-16 03:09:46,935 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 55 predicate places. [2021-12-16 03:09:46,935 INFO L470 AbstractCegarLoop]: Abstraction has has 132 places, 122 transitions, 854 flow [2021-12-16 03:09:46,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:46,936 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:46,936 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] [2021-12-16 03:09:46,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 03:09:46,937 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:46,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:46,937 INFO L85 PathProgramCache]: Analyzing trace with hash 2075483913, now seen corresponding path program 10 times [2021-12-16 03:09:46,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:46,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045026450] [2021-12-16 03:09:46,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:46,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:47,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:47,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:47,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045026450] [2021-12-16 03:09:47,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045026450] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:47,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:47,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 03:09:47,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845517421] [2021-12-16 03:09:47,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:47,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:09:47,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:47,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:09:47,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:09:47,131 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-16 03:09:47,132 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 122 transitions, 854 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:47,132 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:47,132 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-16 03:09:47,132 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:47,459 INFO L129 PetriNetUnfolder]: 186/524 cut-off events. [2021-12-16 03:09:47,459 INFO L130 PetriNetUnfolder]: For 1928/1930 co-relation queries the response was YES. [2021-12-16 03:09:47,461 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1919 conditions, 524 events. 186/524 cut-off events. For 1928/1930 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2681 event pairs, 33 based on Foata normal form. 3/520 useless extension candidates. Maximal degree in co-relation 1891. Up to 139 conditions per place. [2021-12-16 03:09:47,464 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 65 selfloop transitions, 43 changer transitions 8/157 dead transitions. [2021-12-16 03:09:47,465 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 157 transitions, 1231 flow [2021-12-16 03:09:47,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:09:47,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-16 03:09:47,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 797 transitions. [2021-12-16 03:09:47,467 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6543513957307061 [2021-12-16 03:09:47,467 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 797 transitions. [2021-12-16 03:09:47,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 797 transitions. [2021-12-16 03:09:47,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:47,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 797 transitions. [2021-12-16 03:09:47,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.92857142857143) internal successors, (797), 14 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:47,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:47,471 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:47,471 INFO L186 Difference]: Start difference. First operand has 132 places, 122 transitions, 854 flow. Second operand 14 states and 797 transitions. [2021-12-16 03:09:47,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 157 transitions, 1231 flow [2021-12-16 03:09:47,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 157 transitions, 1133 flow, removed 7 selfloop flow, removed 12 redundant places. [2021-12-16 03:09:47,481 INFO L242 Difference]: Finished difference. Result has 132 places, 123 transitions, 868 flow [2021-12-16 03:09:47,482 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=868, PETRI_PLACES=132, PETRI_TRANSITIONS=123} [2021-12-16 03:09:47,482 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 55 predicate places. [2021-12-16 03:09:47,482 INFO L470 AbstractCegarLoop]: Abstraction has has 132 places, 123 transitions, 868 flow [2021-12-16 03:09:47,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:47,483 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:47,483 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] [2021-12-16 03:09:47,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 03:09:47,483 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:47,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:47,484 INFO L85 PathProgramCache]: Analyzing trace with hash 663981045, now seen corresponding path program 11 times [2021-12-16 03:09:47,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:47,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045552086] [2021-12-16 03:09:47,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:47,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:47,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:47,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045552086] [2021-12-16 03:09:47,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045552086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:47,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:47,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 03:09:47,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439017980] [2021-12-16 03:09:47,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:47,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:09:47,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:47,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:09:47,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:09:47,632 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-16 03:09:47,632 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 123 transitions, 868 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:47,633 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:47,633 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-16 03:09:47,633 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:47,895 INFO L129 PetriNetUnfolder]: 183/514 cut-off events. [2021-12-16 03:09:47,895 INFO L130 PetriNetUnfolder]: For 1939/1943 co-relation queries the response was YES. [2021-12-16 03:09:47,898 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1912 conditions, 514 events. 183/514 cut-off events. For 1939/1943 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2623 event pairs, 29 based on Foata normal form. 3/512 useless extension candidates. Maximal degree in co-relation 1883. Up to 148 conditions per place. [2021-12-16 03:09:47,900 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 63 selfloop transitions, 40 changer transitions 8/152 dead transitions. [2021-12-16 03:09:47,901 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 152 transitions, 1210 flow [2021-12-16 03:09:47,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:09:47,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-16 03:09:47,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 791 transitions. [2021-12-16 03:09:47,902 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6494252873563219 [2021-12-16 03:09:47,903 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 791 transitions. [2021-12-16 03:09:47,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 791 transitions. [2021-12-16 03:09:47,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:47,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 791 transitions. [2021-12-16 03:09:47,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.5) internal successors, (791), 14 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:47,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:47,911 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:47,911 INFO L186 Difference]: Start difference. First operand has 132 places, 123 transitions, 868 flow. Second operand 14 states and 791 transitions. [2021-12-16 03:09:47,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 152 transitions, 1210 flow [2021-12-16 03:09:47,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 152 transitions, 1108 flow, removed 9 selfloop flow, removed 12 redundant places. [2021-12-16 03:09:47,924 INFO L242 Difference]: Finished difference. Result has 133 places, 121 transitions, 833 flow [2021-12-16 03:09:47,924 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=770, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=833, PETRI_PLACES=133, PETRI_TRANSITIONS=121} [2021-12-16 03:09:47,925 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 56 predicate places. [2021-12-16 03:09:47,925 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 121 transitions, 833 flow [2021-12-16 03:09:47,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:47,926 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:47,926 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] [2021-12-16 03:09:47,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 03:09:47,926 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:47,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:47,927 INFO L85 PathProgramCache]: Analyzing trace with hash -624385243, now seen corresponding path program 12 times [2021-12-16 03:09:47,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:47,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777168425] [2021-12-16 03:09:47,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:47,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:48,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:48,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777168425] [2021-12-16 03:09:48,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777168425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:48,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:48,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 03:09:48,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529648784] [2021-12-16 03:09:48,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:48,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:09:48,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:48,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:09:48,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:09:48,083 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-16 03:09:48,084 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 121 transitions, 833 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:48,084 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:48,084 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-16 03:09:48,084 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:48,349 INFO L129 PetriNetUnfolder]: 183/520 cut-off events. [2021-12-16 03:09:48,350 INFO L130 PetriNetUnfolder]: For 1898/1902 co-relation queries the response was YES. [2021-12-16 03:09:48,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1905 conditions, 520 events. 183/520 cut-off events. For 1898/1902 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2699 event pairs, 30 based on Foata normal form. 3/517 useless extension candidates. Maximal degree in co-relation 1876. Up to 146 conditions per place. [2021-12-16 03:09:48,354 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 65 selfloop transitions, 41 changer transitions 7/154 dead transitions. [2021-12-16 03:09:48,355 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 154 transitions, 1195 flow [2021-12-16 03:09:48,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:09:48,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-16 03:09:48,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2021-12-16 03:09:48,356 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2021-12-16 03:09:48,356 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2021-12-16 03:09:48,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2021-12-16 03:09:48,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:48,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2021-12-16 03:09:48,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:48,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:48,362 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:48,362 INFO L186 Difference]: Start difference. First operand has 133 places, 121 transitions, 833 flow. Second operand 14 states and 793 transitions. [2021-12-16 03:09:48,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 154 transitions, 1195 flow [2021-12-16 03:09:48,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 154 transitions, 1101 flow, removed 7 selfloop flow, removed 12 redundant places. [2021-12-16 03:09:48,371 INFO L242 Difference]: Finished difference. Result has 133 places, 122 transitions, 845 flow [2021-12-16 03:09:48,371 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=845, PETRI_PLACES=133, PETRI_TRANSITIONS=122} [2021-12-16 03:09:48,372 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 56 predicate places. [2021-12-16 03:09:48,372 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 122 transitions, 845 flow [2021-12-16 03:09:48,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:48,373 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:48,373 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] [2021-12-16 03:09:48,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 03:09:48,373 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:48,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:48,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1617178085, now seen corresponding path program 13 times [2021-12-16 03:09:48,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:48,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692709927] [2021-12-16 03:09:48,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:48,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:48,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:48,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692709927] [2021-12-16 03:09:48,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692709927] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:48,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:48,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 03:09:48,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122611268] [2021-12-16 03:09:48,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:48,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:09:48,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:48,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:09:48,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:09:48,539 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-16 03:09:48,540 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 122 transitions, 845 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:48,540 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:48,540 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-16 03:09:48,540 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:48,870 INFO L129 PetriNetUnfolder]: 179/485 cut-off events. [2021-12-16 03:09:48,871 INFO L130 PetriNetUnfolder]: For 1892/1894 co-relation queries the response was YES. [2021-12-16 03:09:48,873 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1859 conditions, 485 events. 179/485 cut-off events. For 1892/1894 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2422 event pairs, 45 based on Foata normal form. 1/475 useless extension candidates. Maximal degree in co-relation 1829. Up to 142 conditions per place. [2021-12-16 03:09:48,876 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 63 selfloop transitions, 42 changer transitions 8/154 dead transitions. [2021-12-16 03:09:48,876 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 154 transitions, 1230 flow [2021-12-16 03:09:48,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:09:48,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-16 03:09:48,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2021-12-16 03:09:48,878 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2021-12-16 03:09:48,878 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2021-12-16 03:09:48,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2021-12-16 03:09:48,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:48,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2021-12-16 03:09:48,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:48,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:48,883 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:48,883 INFO L186 Difference]: Start difference. First operand has 133 places, 122 transitions, 845 flow. Second operand 14 states and 793 transitions. [2021-12-16 03:09:48,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 154 transitions, 1230 flow [2021-12-16 03:09:48,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 154 transitions, 1132 flow, removed 7 selfloop flow, removed 12 redundant places. [2021-12-16 03:09:48,893 INFO L242 Difference]: Finished difference. Result has 136 places, 124 transitions, 888 flow [2021-12-16 03:09:48,893 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=888, PETRI_PLACES=136, PETRI_TRANSITIONS=124} [2021-12-16 03:09:48,894 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 59 predicate places. [2021-12-16 03:09:48,894 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 124 transitions, 888 flow [2021-12-16 03:09:48,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:48,895 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:48,895 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] [2021-12-16 03:09:48,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 03:09:48,895 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:48,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:48,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1154053461, now seen corresponding path program 14 times [2021-12-16 03:09:48,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:48,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695191814] [2021-12-16 03:09:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:48,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:48,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:49,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:49,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695191814] [2021-12-16 03:09:49,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695191814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:49,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:49,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 03:09:49,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588421168] [2021-12-16 03:09:49,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:49,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:09:49,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:49,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:09:49,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:09:49,058 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-16 03:09:49,058 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 124 transitions, 888 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:49,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:49,058 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-16 03:09:49,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:49,368 INFO L129 PetriNetUnfolder]: 180/513 cut-off events. [2021-12-16 03:09:49,368 INFO L130 PetriNetUnfolder]: For 1930/1932 co-relation queries the response was YES. [2021-12-16 03:09:49,372 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1943 conditions, 513 events. 180/513 cut-off events. For 1930/1932 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2708 event pairs, 49 based on Foata normal form. 1/503 useless extension candidates. Maximal degree in co-relation 1911. Up to 123 conditions per place. [2021-12-16 03:09:49,376 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 75 selfloop transitions, 40 changer transitions 7/163 dead transitions. [2021-12-16 03:09:49,377 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 163 transitions, 1319 flow [2021-12-16 03:09:49,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:09:49,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-16 03:09:49,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2021-12-16 03:09:49,380 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2021-12-16 03:09:49,380 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2021-12-16 03:09:49,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2021-12-16 03:09:49,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:49,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2021-12-16 03:09:49,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:49,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:49,386 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:49,386 INFO L186 Difference]: Start difference. First operand has 136 places, 124 transitions, 888 flow. Second operand 14 states and 793 transitions. [2021-12-16 03:09:49,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 163 transitions, 1319 flow [2021-12-16 03:09:49,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 163 transitions, 1242 flow, removed 7 selfloop flow, removed 10 redundant places. [2021-12-16 03:09:49,397 INFO L242 Difference]: Finished difference. Result has 141 places, 127 transitions, 937 flow [2021-12-16 03:09:49,398 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=937, PETRI_PLACES=141, PETRI_TRANSITIONS=127} [2021-12-16 03:09:49,398 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 64 predicate places. [2021-12-16 03:09:49,398 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 127 transitions, 937 flow [2021-12-16 03:09:49,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:49,399 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:49,399 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] [2021-12-16 03:09:49,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 03:09:49,400 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:49,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:49,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2109524753, now seen corresponding path program 15 times [2021-12-16 03:09:49,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:49,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550752678] [2021-12-16 03:09:49,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:49,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:49,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:49,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550752678] [2021-12-16 03:09:49,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550752678] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:49,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:49,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 03:09:49,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618158834] [2021-12-16 03:09:49,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:49,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:09:49,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:49,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:09:49,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:09:49,591 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-16 03:09:49,592 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 127 transitions, 937 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:49,592 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:49,592 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-16 03:09:49,592 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:49,887 INFO L129 PetriNetUnfolder]: 183/546 cut-off events. [2021-12-16 03:09:49,887 INFO L130 PetriNetUnfolder]: For 2107/2111 co-relation queries the response was YES. [2021-12-16 03:09:49,890 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2032 conditions, 546 events. 183/546 cut-off events. For 2107/2111 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2944 event pairs, 41 based on Foata normal form. 3/541 useless extension candidates. Maximal degree in co-relation 1998. Up to 161 conditions per place. [2021-12-16 03:09:49,893 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 70 selfloop transitions, 38 changer transitions 8/157 dead transitions. [2021-12-16 03:09:49,893 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 157 transitions, 1325 flow [2021-12-16 03:09:49,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:09:49,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-16 03:09:49,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 788 transitions. [2021-12-16 03:09:49,895 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6469622331691297 [2021-12-16 03:09:49,895 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 788 transitions. [2021-12-16 03:09:49,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 788 transitions. [2021-12-16 03:09:49,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:49,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 788 transitions. [2021-12-16 03:09:49,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.285714285714285) internal successors, (788), 14 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:49,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:49,900 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:49,900 INFO L186 Difference]: Start difference. First operand has 141 places, 127 transitions, 937 flow. Second operand 14 states and 788 transitions. [2021-12-16 03:09:49,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 157 transitions, 1325 flow [2021-12-16 03:09:49,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 157 transitions, 1236 flow, removed 10 selfloop flow, removed 11 redundant places. [2021-12-16 03:09:49,911 INFO L242 Difference]: Finished difference. Result has 143 places, 125 transitions, 912 flow [2021-12-16 03:09:49,912 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=912, PETRI_PLACES=143, PETRI_TRANSITIONS=125} [2021-12-16 03:09:49,912 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 66 predicate places. [2021-12-16 03:09:49,912 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 125 transitions, 912 flow [2021-12-16 03:09:49,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:49,913 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:49,913 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] [2021-12-16 03:09:49,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 03:09:49,914 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:49,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:49,914 INFO L85 PathProgramCache]: Analyzing trace with hash 967734761, now seen corresponding path program 16 times [2021-12-16 03:09:49,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:49,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765940053] [2021-12-16 03:09:49,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:49,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:50,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:50,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765940053] [2021-12-16 03:09:50,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765940053] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:50,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:50,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 03:09:50,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856828125] [2021-12-16 03:09:50,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:50,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:09:50,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:50,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:09:50,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:09:50,068 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-16 03:09:50,069 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 125 transitions, 912 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:50,069 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:50,069 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-16 03:09:50,069 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:50,365 INFO L129 PetriNetUnfolder]: 179/516 cut-off events. [2021-12-16 03:09:50,365 INFO L130 PetriNetUnfolder]: For 2042/2044 co-relation queries the response was YES. [2021-12-16 03:09:50,368 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1984 conditions, 516 events. 179/516 cut-off events. For 2042/2044 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2778 event pairs, 51 based on Foata normal form. 1/505 useless extension candidates. Maximal degree in co-relation 1950. Up to 151 conditions per place. [2021-12-16 03:09:50,371 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 72 selfloop transitions, 39 changer transitions 7/159 dead transitions. [2021-12-16 03:09:50,371 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 159 transitions, 1325 flow [2021-12-16 03:09:50,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:09:50,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-16 03:09:50,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2021-12-16 03:09:50,373 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2021-12-16 03:09:50,374 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2021-12-16 03:09:50,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2021-12-16 03:09:50,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:50,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2021-12-16 03:09:50,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:50,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:50,378 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:50,378 INFO L186 Difference]: Start difference. First operand has 143 places, 125 transitions, 912 flow. Second operand 14 states and 790 transitions. [2021-12-16 03:09:50,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 159 transitions, 1325 flow [2021-12-16 03:09:50,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 159 transitions, 1235 flow, removed 7 selfloop flow, removed 12 redundant places. [2021-12-16 03:09:50,389 INFO L242 Difference]: Finished difference. Result has 143 places, 126 transitions, 928 flow [2021-12-16 03:09:50,389 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=928, PETRI_PLACES=143, PETRI_TRANSITIONS=126} [2021-12-16 03:09:50,390 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 66 predicate places. [2021-12-16 03:09:50,390 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 126 transitions, 928 flow [2021-12-16 03:09:50,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:50,391 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:50,391 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] [2021-12-16 03:09:50,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 03:09:50,391 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:50,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:50,392 INFO L85 PathProgramCache]: Analyzing trace with hash -730886041, now seen corresponding path program 17 times [2021-12-16 03:09:50,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:50,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100565945] [2021-12-16 03:09:50,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:50,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:50,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:50,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100565945] [2021-12-16 03:09:50,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100565945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:50,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:50,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 03:09:50,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495474452] [2021-12-16 03:09:50,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:50,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:09:50,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:50,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:09:50,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:09:50,536 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-16 03:09:50,537 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 126 transitions, 928 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:50,537 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:50,537 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-16 03:09:50,538 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:50,818 INFO L129 PetriNetUnfolder]: 184/536 cut-off events. [2021-12-16 03:09:50,818 INFO L130 PetriNetUnfolder]: For 2173/2175 co-relation queries the response was YES. [2021-12-16 03:09:50,821 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2057 conditions, 536 events. 184/536 cut-off events. For 2173/2175 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2956 event pairs, 48 based on Foata normal form. 1/526 useless extension candidates. Maximal degree in co-relation 2022. Up to 155 conditions per place. [2021-12-16 03:09:50,825 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 71 selfloop transitions, 41 changer transitions 8/161 dead transitions. [2021-12-16 03:09:50,825 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 161 transitions, 1337 flow [2021-12-16 03:09:50,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:09:50,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-16 03:09:50,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 797 transitions. [2021-12-16 03:09:50,829 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6543513957307061 [2021-12-16 03:09:50,829 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 797 transitions. [2021-12-16 03:09:50,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 797 transitions. [2021-12-16 03:09:50,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:50,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 797 transitions. [2021-12-16 03:09:50,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.92857142857143) internal successors, (797), 14 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:50,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:50,834 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:50,834 INFO L186 Difference]: Start difference. First operand has 143 places, 126 transitions, 928 flow. Second operand 14 states and 797 transitions. [2021-12-16 03:09:50,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 161 transitions, 1337 flow [2021-12-16 03:09:50,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 161 transitions, 1243 flow, removed 9 selfloop flow, removed 12 redundant places. [2021-12-16 03:09:50,847 INFO L242 Difference]: Finished difference. Result has 145 places, 128 transitions, 953 flow [2021-12-16 03:09:50,847 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=953, PETRI_PLACES=145, PETRI_TRANSITIONS=128} [2021-12-16 03:09:50,848 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 68 predicate places. [2021-12-16 03:09:50,848 INFO L470 AbstractCegarLoop]: Abstraction has has 145 places, 128 transitions, 953 flow [2021-12-16 03:09:50,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:50,849 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:50,849 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] [2021-12-16 03:09:50,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-16 03:09:50,849 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:50,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:50,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1732875929, now seen corresponding path program 18 times [2021-12-16 03:09:50,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:50,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281466382] [2021-12-16 03:09:50,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:50,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:50,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:50,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:50,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281466382] [2021-12-16 03:09:50,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281466382] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:50,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:50,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 03:09:50,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600508478] [2021-12-16 03:09:50,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:50,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:09:50,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:50,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:09:50,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:09:50,996 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-16 03:09:50,997 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 128 transitions, 953 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:50,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:50,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-16 03:09:50,997 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:51,258 INFO L129 PetriNetUnfolder]: 181/530 cut-off events. [2021-12-16 03:09:51,258 INFO L130 PetriNetUnfolder]: For 2292/2294 co-relation queries the response was YES. [2021-12-16 03:09:51,261 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2061 conditions, 530 events. 181/530 cut-off events. For 2292/2294 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2913 event pairs, 49 based on Foata normal form. 1/519 useless extension candidates. Maximal degree in co-relation 2025. Up to 166 conditions per place. [2021-12-16 03:09:51,264 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 38 changer transitions 8/156 dead transitions. [2021-12-16 03:09:51,264 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 156 transitions, 1316 flow [2021-12-16 03:09:51,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:09:51,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-16 03:09:51,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2021-12-16 03:09:51,266 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2021-12-16 03:09:51,266 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2021-12-16 03:09:51,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2021-12-16 03:09:51,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:51,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2021-12-16 03:09:51,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:51,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:51,270 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:51,271 INFO L186 Difference]: Start difference. First operand has 145 places, 128 transitions, 953 flow. Second operand 14 states and 790 transitions. [2021-12-16 03:09:51,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 156 transitions, 1316 flow [2021-12-16 03:09:51,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 156 transitions, 1218 flow, removed 10 selfloop flow, removed 12 redundant places. [2021-12-16 03:09:51,283 INFO L242 Difference]: Finished difference. Result has 146 places, 126 transitions, 916 flow [2021-12-16 03:09:51,284 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=916, PETRI_PLACES=146, PETRI_TRANSITIONS=126} [2021-12-16 03:09:51,285 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 69 predicate places. [2021-12-16 03:09:51,285 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 126 transitions, 916 flow [2021-12-16 03:09:51,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:51,285 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:51,286 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] [2021-12-16 03:09:51,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-16 03:09:51,286 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:51,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:51,286 INFO L85 PathProgramCache]: Analyzing trace with hash 134112017, now seen corresponding path program 19 times [2021-12-16 03:09:51,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:51,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325415599] [2021-12-16 03:09:51,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:51,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:51,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:51,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:51,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325415599] [2021-12-16 03:09:51,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325415599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:51,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:51,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 03:09:51,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227061376] [2021-12-16 03:09:51,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:51,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:09:51,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:51,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:09:51,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:09:51,454 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-16 03:09:51,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 126 transitions, 916 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:51,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:51,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-16 03:09:51,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:51,770 INFO L129 PetriNetUnfolder]: 180/525 cut-off events. [2021-12-16 03:09:51,770 INFO L130 PetriNetUnfolder]: For 2241/2243 co-relation queries the response was YES. [2021-12-16 03:09:51,773 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2030 conditions, 525 events. 180/525 cut-off events. For 2241/2243 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2875 event pairs, 46 based on Foata normal form. 1/515 useless extension candidates. Maximal degree in co-relation 1994. Up to 162 conditions per place. [2021-12-16 03:09:51,776 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 68 selfloop transitions, 36 changer transitions 9/154 dead transitions. [2021-12-16 03:09:51,776 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 154 transitions, 1274 flow [2021-12-16 03:09:51,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:09:51,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-16 03:09:51,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2021-12-16 03:09:51,778 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2021-12-16 03:09:51,778 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2021-12-16 03:09:51,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2021-12-16 03:09:51,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:51,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2021-12-16 03:09:51,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:51,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:51,783 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:51,783 INFO L186 Difference]: Start difference. First operand has 146 places, 126 transitions, 916 flow. Second operand 14 states and 792 transitions. [2021-12-16 03:09:51,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 154 transitions, 1274 flow [2021-12-16 03:09:51,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 154 transitions, 1186 flow, removed 6 selfloop flow, removed 12 redundant places. [2021-12-16 03:09:51,794 INFO L242 Difference]: Finished difference. Result has 144 places, 123 transitions, 875 flow [2021-12-16 03:09:51,794 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=875, PETRI_PLACES=144, PETRI_TRANSITIONS=123} [2021-12-16 03:09:51,795 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2021-12-16 03:09:51,795 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 123 transitions, 875 flow [2021-12-16 03:09:51,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:51,795 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:51,796 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] [2021-12-16 03:09:51,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-16 03:09:51,796 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:51,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:51,796 INFO L85 PathProgramCache]: Analyzing trace with hash 386002791, now seen corresponding path program 20 times [2021-12-16 03:09:51,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:51,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119555129] [2021-12-16 03:09:51,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:51,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:51,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:51,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119555129] [2021-12-16 03:09:51,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119555129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:51,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:51,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 03:09:51,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710661232] [2021-12-16 03:09:51,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:51,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:09:51,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:51,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:09:51,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:09:51,952 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-16 03:09:51,952 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 123 transitions, 875 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:51,952 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:51,952 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-16 03:09:51,953 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:52,266 INFO L129 PetriNetUnfolder]: 178/521 cut-off events. [2021-12-16 03:09:52,267 INFO L130 PetriNetUnfolder]: For 2239/2241 co-relation queries the response was YES. [2021-12-16 03:09:52,270 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2007 conditions, 521 events. 178/521 cut-off events. For 2239/2241 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2825 event pairs, 47 based on Foata normal form. 1/511 useless extension candidates. Maximal degree in co-relation 1972. Up to 158 conditions per place. [2021-12-16 03:09:52,273 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 70 selfloop transitions, 37 changer transitions 7/155 dead transitions. [2021-12-16 03:09:52,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 155 transitions, 1262 flow [2021-12-16 03:09:52,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:09:52,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-16 03:09:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2021-12-16 03:09:52,276 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2021-12-16 03:09:52,276 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2021-12-16 03:09:52,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2021-12-16 03:09:52,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:52,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2021-12-16 03:09:52,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:52,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:52,280 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:52,280 INFO L186 Difference]: Start difference. First operand has 144 places, 123 transitions, 875 flow. Second operand 14 states and 793 transitions. [2021-12-16 03:09:52,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 155 transitions, 1262 flow [2021-12-16 03:09:52,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 155 transitions, 1178 flow, removed 6 selfloop flow, removed 11 redundant places. [2021-12-16 03:09:52,292 INFO L242 Difference]: Finished difference. Result has 145 places, 124 transitions, 893 flow [2021-12-16 03:09:52,292 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=893, PETRI_PLACES=145, PETRI_TRANSITIONS=124} [2021-12-16 03:09:52,292 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 68 predicate places. [2021-12-16 03:09:52,293 INFO L470 AbstractCegarLoop]: Abstraction has has 145 places, 124 transitions, 893 flow [2021-12-16 03:09:52,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:52,293 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:52,293 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] [2021-12-16 03:09:52,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-16 03:09:52,294 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:52,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:52,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1276177151, now seen corresponding path program 1 times [2021-12-16 03:09:52,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:52,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014127396] [2021-12-16 03:09:52,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:52,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:52,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:52,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014127396] [2021-12-16 03:09:52,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014127396] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:09:52,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140248449] [2021-12-16 03:09:52,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:52,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:09:52,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:09:52,327 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) [2021-12-16 03:09:52,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 03:09:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:52,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 03:09:52,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:09:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:52,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:09:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:52,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140248449] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 03:09:52,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:09:52,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2021-12-16 03:09:52,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195046203] [2021-12-16 03:09:52,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:52,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:09:52,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:52,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:09:52,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:09:52,726 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-16 03:09:52,727 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 124 transitions, 893 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:52,727 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:52,727 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-16 03:09:52,727 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:52,837 INFO L129 PetriNetUnfolder]: 187/539 cut-off events. [2021-12-16 03:09:52,838 INFO L130 PetriNetUnfolder]: For 2725/2725 co-relation queries the response was YES. [2021-12-16 03:09:52,841 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2091 conditions, 539 events. 187/539 cut-off events. For 2725/2725 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2877 event pairs, 22 based on Foata normal form. 8/539 useless extension candidates. Maximal degree in co-relation 2054. Up to 139 conditions per place. [2021-12-16 03:09:52,846 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 92 selfloop transitions, 35 changer transitions 0/176 dead transitions. [2021-12-16 03:09:52,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 176 transitions, 1667 flow [2021-12-16 03:09:52,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:09:52,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:09:52,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2021-12-16 03:09:52,850 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2021-12-16 03:09:52,850 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2021-12-16 03:09:52,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2021-12-16 03:09:52,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:52,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2021-12-16 03:09:52,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:52,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:52,853 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:52,853 INFO L186 Difference]: Start difference. First operand has 145 places, 124 transitions, 893 flow. Second operand 7 states and 483 transitions. [2021-12-16 03:09:52,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 176 transitions, 1667 flow [2021-12-16 03:09:52,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 176 transitions, 1538 flow, removed 8 selfloop flow, removed 12 redundant places. [2021-12-16 03:09:52,867 INFO L242 Difference]: Finished difference. Result has 137 places, 139 transitions, 1047 flow [2021-12-16 03:09:52,867 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1047, PETRI_PLACES=137, PETRI_TRANSITIONS=139} [2021-12-16 03:09:52,869 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 60 predicate places. [2021-12-16 03:09:52,869 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 139 transitions, 1047 flow [2021-12-16 03:09:52,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:52,869 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:52,869 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] [2021-12-16 03:09:52,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 03:09:53,083 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,SelfDestructingSolverStorable21 [2021-12-16 03:09:53,084 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:53,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:53,084 INFO L85 PathProgramCache]: Analyzing trace with hash 16939645, now seen corresponding path program 2 times [2021-12-16 03:09:53,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:53,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21698387] [2021-12-16 03:09:53,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:53,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:53,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:53,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21698387] [2021-12-16 03:09:53,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21698387] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:53,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:53,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:09:53,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536326252] [2021-12-16 03:09:53,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:53,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:09:53,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:53,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:09:53,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:09:53,134 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-16 03:09:53,135 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 139 transitions, 1047 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:53,135 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:53,135 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-16 03:09:53,135 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:53,272 INFO L129 PetriNetUnfolder]: 219/661 cut-off events. [2021-12-16 03:09:53,273 INFO L130 PetriNetUnfolder]: For 3349/3352 co-relation queries the response was YES. [2021-12-16 03:09:53,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2568 conditions, 661 events. 219/661 cut-off events. For 3349/3352 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3897 event pairs, 51 based on Foata normal form. 3/656 useless extension candidates. Maximal degree in co-relation 2533. Up to 144 conditions per place. [2021-12-16 03:09:53,280 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 104 selfloop transitions, 45 changer transitions 0/198 dead transitions. [2021-12-16 03:09:53,280 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 198 transitions, 1832 flow [2021-12-16 03:09:53,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:09:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-16 03:09:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 561 transitions. [2021-12-16 03:09:53,282 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8060344827586207 [2021-12-16 03:09:53,282 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 561 transitions. [2021-12-16 03:09:53,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 561 transitions. [2021-12-16 03:09:53,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:53,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 561 transitions. [2021-12-16 03:09:53,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 70.125) internal successors, (561), 8 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:53,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:53,285 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:53,285 INFO L186 Difference]: Start difference. First operand has 137 places, 139 transitions, 1047 flow. Second operand 8 states and 561 transitions. [2021-12-16 03:09:53,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 198 transitions, 1832 flow [2021-12-16 03:09:53,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 198 transitions, 1778 flow, removed 22 selfloop flow, removed 1 redundant places. [2021-12-16 03:09:53,303 INFO L242 Difference]: Finished difference. Result has 149 places, 156 transitions, 1401 flow [2021-12-16 03:09:53,304 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1401, PETRI_PLACES=149, PETRI_TRANSITIONS=156} [2021-12-16 03:09:53,304 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 72 predicate places. [2021-12-16 03:09:53,305 INFO L470 AbstractCegarLoop]: Abstraction has has 149 places, 156 transitions, 1401 flow [2021-12-16 03:09:53,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:53,305 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:53,305 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] [2021-12-16 03:09:53,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-16 03:09:53,305 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:53,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:53,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1362331349, now seen corresponding path program 1 times [2021-12-16 03:09:53,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:53,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457801980] [2021-12-16 03:09:53,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:53,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:53,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:53,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457801980] [2021-12-16 03:09:53,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457801980] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:09:53,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267813888] [2021-12-16 03:09:53,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:53,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:09:53,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:09:53,344 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) [2021-12-16 03:09:53,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 03:09:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:53,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 03:09:53,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:09:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:53,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:09:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:53,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267813888] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 03:09:53,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:09:53,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2021-12-16 03:09:53,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961833494] [2021-12-16 03:09:53,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:53,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:09:53,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:53,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:09:53,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:09:53,621 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-16 03:09:53,622 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 156 transitions, 1401 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:53,622 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:53,622 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-16 03:09:53,622 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:53,759 INFO L129 PetriNetUnfolder]: 246/782 cut-off events. [2021-12-16 03:09:53,760 INFO L130 PetriNetUnfolder]: For 5058/5066 co-relation queries the response was YES. [2021-12-16 03:09:53,764 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3193 conditions, 782 events. 246/782 cut-off events. For 5058/5066 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4917 event pairs, 59 based on Foata normal form. 9/782 useless extension candidates. Maximal degree in co-relation 3152. Up to 217 conditions per place. [2021-12-16 03:09:53,768 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 132 selfloop transitions, 40 changer transitions 2/223 dead transitions. [2021-12-16 03:09:53,768 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 223 transitions, 2365 flow [2021-12-16 03:09:53,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:09:53,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-16 03:09:53,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 429 transitions. [2021-12-16 03:09:53,770 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8218390804597702 [2021-12-16 03:09:53,770 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 429 transitions. [2021-12-16 03:09:53,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 429 transitions. [2021-12-16 03:09:53,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:53,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 429 transitions. [2021-12-16 03:09:53,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.5) internal successors, (429), 6 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:53,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:53,772 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:53,773 INFO L186 Difference]: Start difference. First operand has 149 places, 156 transitions, 1401 flow. Second operand 6 states and 429 transitions. [2021-12-16 03:09:53,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 223 transitions, 2365 flow [2021-12-16 03:09:53,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 223 transitions, 2305 flow, removed 15 selfloop flow, removed 4 redundant places. [2021-12-16 03:09:53,795 INFO L242 Difference]: Finished difference. Result has 155 places, 171 transitions, 1699 flow [2021-12-16 03:09:53,795 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1360, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1699, PETRI_PLACES=155, PETRI_TRANSITIONS=171} [2021-12-16 03:09:53,796 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 78 predicate places. [2021-12-16 03:09:53,796 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 171 transitions, 1699 flow [2021-12-16 03:09:53,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:53,796 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:53,797 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] [2021-12-16 03:09:53,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 03:09:54,013 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,SelfDestructingSolverStorable23 [2021-12-16 03:09:54,014 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:54,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:54,014 INFO L85 PathProgramCache]: Analyzing trace with hash -993051711, now seen corresponding path program 2 times [2021-12-16 03:09:54,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:54,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012017941] [2021-12-16 03:09:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:54,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:54,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:54,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012017941] [2021-12-16 03:09:54,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012017941] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:54,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:54,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:09:54,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430044359] [2021-12-16 03:09:54,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:54,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:09:54,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:54,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:09:54,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:09:54,042 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-16 03:09:54,043 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 171 transitions, 1699 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:54,043 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:54,043 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-16 03:09:54,043 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:54,201 INFO L129 PetriNetUnfolder]: 235/766 cut-off events. [2021-12-16 03:09:54,201 INFO L130 PetriNetUnfolder]: For 5576/5586 co-relation queries the response was YES. [2021-12-16 03:09:54,205 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3293 conditions, 766 events. 235/766 cut-off events. For 5576/5586 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4806 event pairs, 56 based on Foata normal form. 9/767 useless extension candidates. Maximal degree in co-relation 3251. Up to 155 conditions per place. [2021-12-16 03:09:54,208 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 110 selfloop transitions, 39 changer transitions 5/203 dead transitions. [2021-12-16 03:09:54,208 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 203 transitions, 2281 flow [2021-12-16 03:09:54,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:09:54,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:09:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 486 transitions. [2021-12-16 03:09:54,210 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7980295566502463 [2021-12-16 03:09:54,210 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 486 transitions. [2021-12-16 03:09:54,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 486 transitions. [2021-12-16 03:09:54,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:54,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 486 transitions. [2021-12-16 03:09:54,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.42857142857143) internal successors, (486), 7 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:54,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:54,213 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:54,213 INFO L186 Difference]: Start difference. First operand has 155 places, 171 transitions, 1699 flow. Second operand 7 states and 486 transitions. [2021-12-16 03:09:54,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 203 transitions, 2281 flow [2021-12-16 03:09:54,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 203 transitions, 2242 flow, removed 13 selfloop flow, removed 1 redundant places. [2021-12-16 03:09:54,239 INFO L242 Difference]: Finished difference. Result has 161 places, 171 transitions, 1761 flow [2021-12-16 03:09:54,239 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1619, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1761, PETRI_PLACES=161, PETRI_TRANSITIONS=171} [2021-12-16 03:09:54,239 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 84 predicate places. [2021-12-16 03:09:54,240 INFO L470 AbstractCegarLoop]: Abstraction has has 161 places, 171 transitions, 1761 flow [2021-12-16 03:09:54,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:54,240 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:54,240 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] [2021-12-16 03:09:54,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-16 03:09:54,241 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:54,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:54,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1518909217, now seen corresponding path program 3 times [2021-12-16 03:09:54,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:54,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236978463] [2021-12-16 03:09:54,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:54,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:54,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:54,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236978463] [2021-12-16 03:09:54,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236978463] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:54,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:54,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:09:54,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893028071] [2021-12-16 03:09:54,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:54,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:09:54,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:54,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:09:54,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:09:54,267 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-16 03:09:54,268 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 171 transitions, 1761 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:54,268 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:54,268 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-16 03:09:54,268 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:54,421 INFO L129 PetriNetUnfolder]: 264/833 cut-off events. [2021-12-16 03:09:54,421 INFO L130 PetriNetUnfolder]: For 6820/6820 co-relation queries the response was YES. [2021-12-16 03:09:54,425 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3624 conditions, 833 events. 264/833 cut-off events. For 6820/6820 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5143 event pairs, 38 based on Foata normal form. 11/838 useless extension candidates. Maximal degree in co-relation 3581. Up to 137 conditions per place. [2021-12-16 03:09:54,429 INFO L132 encePairwiseOnDemand]: 77/87 looper letters, 105 selfloop transitions, 96 changer transitions 4/254 dead transitions. [2021-12-16 03:09:54,429 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 254 transitions, 3112 flow [2021-12-16 03:09:54,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:09:54,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-16 03:09:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 617 transitions. [2021-12-16 03:09:54,431 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7879948914431673 [2021-12-16 03:09:54,431 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 617 transitions. [2021-12-16 03:09:54,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 617 transitions. [2021-12-16 03:09:54,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:54,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 617 transitions. [2021-12-16 03:09:54,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 68.55555555555556) internal successors, (617), 9 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:54,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:54,434 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:54,434 INFO L186 Difference]: Start difference. First operand has 161 places, 171 transitions, 1761 flow. Second operand 9 states and 617 transitions. [2021-12-16 03:09:54,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 254 transitions, 3112 flow [2021-12-16 03:09:54,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 254 transitions, 3012 flow, removed 45 selfloop flow, removed 4 redundant places. [2021-12-16 03:09:54,461 INFO L242 Difference]: Finished difference. Result has 167 places, 214 transitions, 2653 flow [2021-12-16 03:09:54,461 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1697, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2653, PETRI_PLACES=167, PETRI_TRANSITIONS=214} [2021-12-16 03:09:54,462 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 90 predicate places. [2021-12-16 03:09:54,462 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 214 transitions, 2653 flow [2021-12-16 03:09:54,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:54,462 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:54,463 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] [2021-12-16 03:09:54,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-16 03:09:54,463 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:54,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:54,464 INFO L85 PathProgramCache]: Analyzing trace with hash 670617617, now seen corresponding path program 3 times [2021-12-16 03:09:54,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:54,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110023890] [2021-12-16 03:09:54,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:54,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:54,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:54,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110023890] [2021-12-16 03:09:54,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110023890] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:09:54,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954223238] [2021-12-16 03:09:54,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 03:09:54,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:09:54,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:09:54,489 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) [2021-12-16 03:09:54,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 03:09:54,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-16 03:09:54,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:09:54,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 03:09:54,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:09:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:54,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:09:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:54,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954223238] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 03:09:54,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:09:54,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2021-12-16 03:09:54,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721722877] [2021-12-16 03:09:54,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:54,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:09:54,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:54,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:09:54,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:09:54,780 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-16 03:09:54,780 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 214 transitions, 2653 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:54,780 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:54,780 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-16 03:09:54,780 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:54,970 INFO L129 PetriNetUnfolder]: 283/957 cut-off events. [2021-12-16 03:09:54,970 INFO L130 PetriNetUnfolder]: For 8919/8927 co-relation queries the response was YES. [2021-12-16 03:09:54,975 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4241 conditions, 957 events. 283/957 cut-off events. For 8919/8927 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6344 event pairs, 43 based on Foata normal form. 12/957 useless extension candidates. Maximal degree in co-relation 4196. Up to 180 conditions per place. [2021-12-16 03:09:54,980 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 120 selfloop transitions, 99 changer transitions 2/270 dead transitions. [2021-12-16 03:09:54,980 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 270 transitions, 3713 flow [2021-12-16 03:09:54,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:09:54,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-16 03:09:54,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 428 transitions. [2021-12-16 03:09:54,982 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8199233716475096 [2021-12-16 03:09:54,982 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 428 transitions. [2021-12-16 03:09:54,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 428 transitions. [2021-12-16 03:09:54,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:54,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 428 transitions. [2021-12-16 03:09:54,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.33333333333333) internal successors, (428), 6 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:54,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:54,984 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:54,984 INFO L186 Difference]: Start difference. First operand has 167 places, 214 transitions, 2653 flow. Second operand 6 states and 428 transitions. [2021-12-16 03:09:54,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 270 transitions, 3713 flow [2021-12-16 03:09:55,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 270 transitions, 3626 flow, removed 36 selfloop flow, removed 1 redundant places. [2021-12-16 03:09:55,022 INFO L242 Difference]: Finished difference. Result has 176 places, 232 transitions, 3250 flow [2021-12-16 03:09:55,022 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2550, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3250, PETRI_PLACES=176, PETRI_TRANSITIONS=232} [2021-12-16 03:09:55,023 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 99 predicate places. [2021-12-16 03:09:55,023 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 232 transitions, 3250 flow [2021-12-16 03:09:55,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:55,023 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:55,023 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] [2021-12-16 03:09:55,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-16 03:09:55,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:09:55,239 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:55,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:55,240 INFO L85 PathProgramCache]: Analyzing trace with hash -905738307, now seen corresponding path program 4 times [2021-12-16 03:09:55,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:55,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082993741] [2021-12-16 03:09:55,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:55,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:55,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:55,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082993741] [2021-12-16 03:09:55,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082993741] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:55,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:55,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:09:55,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181895593] [2021-12-16 03:09:55,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:55,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:09:55,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:55,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:09:55,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:09:55,267 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-16 03:09:55,268 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 232 transitions, 3250 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:55,268 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:55,268 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-16 03:09:55,268 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:55,470 INFO L129 PetriNetUnfolder]: 274/918 cut-off events. [2021-12-16 03:09:55,471 INFO L130 PetriNetUnfolder]: For 11059/11085 co-relation queries the response was YES. [2021-12-16 03:09:55,476 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4502 conditions, 918 events. 274/918 cut-off events. For 11059/11085 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5956 event pairs, 59 based on Foata normal form. 5/913 useless extension candidates. Maximal degree in co-relation 4453. Up to 224 conditions per place. [2021-12-16 03:09:55,483 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 150 selfloop transitions, 67 changer transitions 5/271 dead transitions. [2021-12-16 03:09:55,483 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 271 transitions, 4089 flow [2021-12-16 03:09:55,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:09:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-16 03:09:55,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 554 transitions. [2021-12-16 03:09:55,485 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7959770114942529 [2021-12-16 03:09:55,485 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 554 transitions. [2021-12-16 03:09:55,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 554 transitions. [2021-12-16 03:09:55,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:55,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 554 transitions. [2021-12-16 03:09:55,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 69.25) internal successors, (554), 8 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:55,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:55,488 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:55,488 INFO L186 Difference]: Start difference. First operand has 176 places, 232 transitions, 3250 flow. Second operand 8 states and 554 transitions. [2021-12-16 03:09:55,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 271 transitions, 4089 flow [2021-12-16 03:09:55,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 271 transitions, 4000 flow, removed 15 selfloop flow, removed 5 redundant places. [2021-12-16 03:09:55,527 INFO L242 Difference]: Finished difference. Result has 180 places, 238 transitions, 3529 flow [2021-12-16 03:09:55,527 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3110, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3529, PETRI_PLACES=180, PETRI_TRANSITIONS=238} [2021-12-16 03:09:55,530 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 103 predicate places. [2021-12-16 03:09:55,530 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 238 transitions, 3529 flow [2021-12-16 03:09:55,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:55,531 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:55,531 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] [2021-12-16 03:09:55,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-16 03:09:55,531 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:55,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:55,532 INFO L85 PathProgramCache]: Analyzing trace with hash 136961357, now seen corresponding path program 5 times [2021-12-16 03:09:55,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:55,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888856972] [2021-12-16 03:09:55,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:55,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:55,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:55,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:55,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888856972] [2021-12-16 03:09:55,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888856972] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:55,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:55,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:09:55,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749316091] [2021-12-16 03:09:55,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:55,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:09:55,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:55,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:09:55,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:09:55,559 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-16 03:09:55,559 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 238 transitions, 3529 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:55,559 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:55,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-16 03:09:55,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:55,771 INFO L129 PetriNetUnfolder]: 255/846 cut-off events. [2021-12-16 03:09:55,772 INFO L130 PetriNetUnfolder]: For 11370/11394 co-relation queries the response was YES. [2021-12-16 03:09:55,777 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4296 conditions, 846 events. 255/846 cut-off events. For 11370/11394 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5298 event pairs, 50 based on Foata normal form. 9/846 useless extension candidates. Maximal degree in co-relation 4246. Up to 203 conditions per place. [2021-12-16 03:09:55,781 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 122 selfloop transitions, 98 changer transitions 2/271 dead transitions. [2021-12-16 03:09:55,781 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 271 transitions, 4201 flow [2021-12-16 03:09:55,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:09:55,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-16 03:09:55,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 568 transitions. [2021-12-16 03:09:55,783 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2021-12-16 03:09:55,783 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 568 transitions. [2021-12-16 03:09:55,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 568 transitions. [2021-12-16 03:09:55,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:55,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 568 transitions. [2021-12-16 03:09:55,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 71.0) internal successors, (568), 8 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:55,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:55,786 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:55,787 INFO L186 Difference]: Start difference. First operand has 180 places, 238 transitions, 3529 flow. Second operand 8 states and 568 transitions. [2021-12-16 03:09:55,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 271 transitions, 4201 flow [2021-12-16 03:09:55,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 271 transitions, 4109 flow, removed 22 selfloop flow, removed 4 redundant places. [2021-12-16 03:09:55,826 INFO L242 Difference]: Finished difference. Result has 181 places, 233 transitions, 3553 flow [2021-12-16 03:09:55,827 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3272, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3553, PETRI_PLACES=181, PETRI_TRANSITIONS=233} [2021-12-16 03:09:55,829 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 104 predicate places. [2021-12-16 03:09:55,830 INFO L470 AbstractCegarLoop]: Abstraction has has 181 places, 233 transitions, 3553 flow [2021-12-16 03:09:55,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:55,830 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:55,830 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] [2021-12-16 03:09:55,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-16 03:09:55,831 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:55,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:55,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1155006557, now seen corresponding path program 4 times [2021-12-16 03:09:55,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:55,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086711971] [2021-12-16 03:09:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:55,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:55,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:55,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086711971] [2021-12-16 03:09:55,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086711971] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:09:55,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325106695] [2021-12-16 03:09:55,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 03:09:55,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:09:55,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:09:55,864 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) [2021-12-16 03:09:55,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 03:09:55,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 03:09:55,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:09:55,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 03:09:55,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:09:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:56,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:09:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:56,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325106695] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 03:09:56,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:09:56,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2021-12-16 03:09:56,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708750503] [2021-12-16 03:09:56,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:56,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:09:56,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:56,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:09:56,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:09:56,136 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-16 03:09:56,136 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 233 transitions, 3553 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:56,136 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:56,136 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-16 03:09:56,137 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:56,308 INFO L129 PetriNetUnfolder]: 235/755 cut-off events. [2021-12-16 03:09:56,308 INFO L130 PetriNetUnfolder]: For 11472/11472 co-relation queries the response was YES. [2021-12-16 03:09:56,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4025 conditions, 755 events. 235/755 cut-off events. For 11472/11472 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4425 event pairs, 47 based on Foata normal form. 8/757 useless extension candidates. Maximal degree in co-relation 3976. Up to 229 conditions per place. [2021-12-16 03:09:56,317 INFO L132 encePairwiseOnDemand]: 78/87 looper letters, 137 selfloop transitions, 70 changer transitions 0/256 dead transitions. [2021-12-16 03:09:56,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 256 transitions, 4085 flow [2021-12-16 03:09:56,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:09:56,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-16 03:09:56,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 426 transitions. [2021-12-16 03:09:56,318 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2021-12-16 03:09:56,318 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 426 transitions. [2021-12-16 03:09:56,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 426 transitions. [2021-12-16 03:09:56,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:56,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 426 transitions. [2021-12-16 03:09:56,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.0) internal successors, (426), 6 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:56,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:56,320 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:56,320 INFO L186 Difference]: Start difference. First operand has 181 places, 233 transitions, 3553 flow. Second operand 6 states and 426 transitions. [2021-12-16 03:09:56,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 256 transitions, 4085 flow [2021-12-16 03:09:56,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 256 transitions, 3891 flow, removed 23 selfloop flow, removed 6 redundant places. [2021-12-16 03:09:56,360 INFO L242 Difference]: Finished difference. Result has 182 places, 229 transitions, 3480 flow [2021-12-16 03:09:56,360 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3192, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3480, PETRI_PLACES=182, PETRI_TRANSITIONS=229} [2021-12-16 03:09:56,361 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 105 predicate places. [2021-12-16 03:09:56,361 INFO L470 AbstractCegarLoop]: Abstraction has has 182 places, 229 transitions, 3480 flow [2021-12-16 03:09:56,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:56,361 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:56,361 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] [2021-12-16 03:09:56,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 03:09:56,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:09:56,575 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:56,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:56,576 INFO L85 PathProgramCache]: Analyzing trace with hash 722837219, now seen corresponding path program 5 times [2021-12-16 03:09:56,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:56,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976836987] [2021-12-16 03:09:56,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:56,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:56,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:56,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:56,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976836987] [2021-12-16 03:09:56,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976836987] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:56,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:56,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:09:56,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213086274] [2021-12-16 03:09:56,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:56,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:09:56,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:56,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:09:56,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:09:56,603 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-16 03:09:56,604 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 229 transitions, 3480 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:56,604 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:56,604 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-16 03:09:56,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:56,756 INFO L129 PetriNetUnfolder]: 230/745 cut-off events. [2021-12-16 03:09:56,756 INFO L130 PetriNetUnfolder]: For 11155/11157 co-relation queries the response was YES. [2021-12-16 03:09:56,761 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3980 conditions, 745 events. 230/745 cut-off events. For 11155/11157 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4368 event pairs, 59 based on Foata normal form. 3/738 useless extension candidates. Maximal degree in co-relation 3933. Up to 198 conditions per place. [2021-12-16 03:09:56,765 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 155 selfloop transitions, 33 changer transitions 7/244 dead transitions. [2021-12-16 03:09:56,765 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 244 transitions, 3907 flow [2021-12-16 03:09:56,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:09:56,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:09:56,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2021-12-16 03:09:56,767 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2021-12-16 03:09:56,767 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2021-12-16 03:09:56,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2021-12-16 03:09:56,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:56,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2021-12-16 03:09:56,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:56,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:56,769 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:56,769 INFO L186 Difference]: Start difference. First operand has 182 places, 229 transitions, 3480 flow. Second operand 7 states and 483 transitions. [2021-12-16 03:09:56,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 244 transitions, 3907 flow [2021-12-16 03:09:56,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 244 transitions, 3854 flow, removed 10 selfloop flow, removed 1 redundant places. [2021-12-16 03:09:56,807 INFO L242 Difference]: Finished difference. Result has 187 places, 221 transitions, 3258 flow [2021-12-16 03:09:56,808 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3258, PETRI_PLACES=187, PETRI_TRANSITIONS=221} [2021-12-16 03:09:56,808 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 110 predicate places. [2021-12-16 03:09:56,808 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 221 transitions, 3258 flow [2021-12-16 03:09:56,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:56,809 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:56,809 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] [2021-12-16 03:09:56,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-16 03:09:56,809 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:56,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:56,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1170896073, now seen corresponding path program 6 times [2021-12-16 03:09:56,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:56,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157892731] [2021-12-16 03:09:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:56,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:56,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:56,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157892731] [2021-12-16 03:09:56,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157892731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:56,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:56,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:09:56,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139172285] [2021-12-16 03:09:56,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:56,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:09:56,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:56,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:09:56,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:09:56,839 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-16 03:09:56,840 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 221 transitions, 3258 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:56,840 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:56,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-16 03:09:56,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:57,004 INFO L129 PetriNetUnfolder]: 217/679 cut-off events. [2021-12-16 03:09:57,005 INFO L130 PetriNetUnfolder]: For 10438/10440 co-relation queries the response was YES. [2021-12-16 03:09:57,008 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3667 conditions, 679 events. 217/679 cut-off events. For 10438/10440 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3788 event pairs, 50 based on Foata normal form. 2/671 useless extension candidates. Maximal degree in co-relation 3620. Up to 198 conditions per place. [2021-12-16 03:09:57,012 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 128 selfloop transitions, 49 changer transitions 2/228 dead transitions. [2021-12-16 03:09:57,012 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 228 transitions, 3548 flow [2021-12-16 03:09:57,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:09:57,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-16 03:09:57,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 550 transitions. [2021-12-16 03:09:57,014 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7902298850574713 [2021-12-16 03:09:57,014 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 550 transitions. [2021-12-16 03:09:57,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 550 transitions. [2021-12-16 03:09:57,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:57,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 550 transitions. [2021-12-16 03:09:57,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 68.75) internal successors, (550), 8 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:57,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:57,017 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:57,017 INFO L186 Difference]: Start difference. First operand has 187 places, 221 transitions, 3258 flow. Second operand 8 states and 550 transitions. [2021-12-16 03:09:57,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 228 transitions, 3548 flow [2021-12-16 03:09:57,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 228 transitions, 3314 flow, removed 12 selfloop flow, removed 9 redundant places. [2021-12-16 03:09:57,051 INFO L242 Difference]: Finished difference. Result has 181 places, 207 transitions, 2922 flow [2021-12-16 03:09:57,051 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2852, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2922, PETRI_PLACES=181, PETRI_TRANSITIONS=207} [2021-12-16 03:09:57,051 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 104 predicate places. [2021-12-16 03:09:57,051 INFO L470 AbstractCegarLoop]: Abstraction has has 181 places, 207 transitions, 2922 flow [2021-12-16 03:09:57,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:57,052 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:57,052 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] [2021-12-16 03:09:57,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-16 03:09:57,052 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:57,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:57,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1303209121, now seen corresponding path program 6 times [2021-12-16 03:09:57,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:57,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495410536] [2021-12-16 03:09:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:57,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:57,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:57,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495410536] [2021-12-16 03:09:57,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495410536] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:57,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:57,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:09:57,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311587237] [2021-12-16 03:09:57,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:57,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:09:57,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:57,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:09:57,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:09:57,080 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-16 03:09:57,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 207 transitions, 2922 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:57,080 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:57,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-16 03:09:57,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:57,211 INFO L129 PetriNetUnfolder]: 200/607 cut-off events. [2021-12-16 03:09:57,211 INFO L130 PetriNetUnfolder]: For 8656/8658 co-relation queries the response was YES. [2021-12-16 03:09:57,214 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3278 conditions, 607 events. 200/607 cut-off events. For 8656/8658 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3158 event pairs, 41 based on Foata normal form. 3/604 useless extension candidates. Maximal degree in co-relation 3237. Up to 190 conditions per place. [2021-12-16 03:09:57,217 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 111 selfloop transitions, 46 changer transitions 3/209 dead transitions. [2021-12-16 03:09:57,217 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 209 transitions, 3109 flow [2021-12-16 03:09:57,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:09:57,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:09:57,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 480 transitions. [2021-12-16 03:09:57,219 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7881773399014779 [2021-12-16 03:09:57,219 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 480 transitions. [2021-12-16 03:09:57,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 480 transitions. [2021-12-16 03:09:57,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:57,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 480 transitions. [2021-12-16 03:09:57,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.57142857142857) internal successors, (480), 7 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:57,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:57,221 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:57,222 INFO L186 Difference]: Start difference. First operand has 181 places, 207 transitions, 2922 flow. Second operand 7 states and 480 transitions. [2021-12-16 03:09:57,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 209 transitions, 3109 flow [2021-12-16 03:09:57,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 209 transitions, 2957 flow, removed 11 selfloop flow, removed 13 redundant places. [2021-12-16 03:09:57,248 INFO L242 Difference]: Finished difference. Result has 168 places, 193 transitions, 2639 flow [2021-12-16 03:09:57,249 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2575, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2639, PETRI_PLACES=168, PETRI_TRANSITIONS=193} [2021-12-16 03:09:57,249 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 91 predicate places. [2021-12-16 03:09:57,249 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 193 transitions, 2639 flow [2021-12-16 03:09:57,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:57,250 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:57,250 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] [2021-12-16 03:09:57,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-16 03:09:57,250 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:57,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:57,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1214554555, now seen corresponding path program 1 times [2021-12-16 03:09:57,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:57,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121690069] [2021-12-16 03:09:57,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:57,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:57,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:57,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121690069] [2021-12-16 03:09:57,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121690069] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:09:57,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46160946] [2021-12-16 03:09:57,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:57,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:09:57,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:09:57,424 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) [2021-12-16 03:09:57,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 03:09:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:57,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 03:09:57,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:09:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:57,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:09:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:58,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46160946] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:09:58,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:09:58,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-16 03:09:58,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768708256] [2021-12-16 03:09:58,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:09:58,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-16 03:09:58,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:58,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-16 03:09:58,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2021-12-16 03:09:58,638 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-16 03:09:58,640 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 193 transitions, 2639 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:58,640 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:58,640 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-16 03:09:58,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:08,649 INFO L129 PetriNetUnfolder]: 994/2403 cut-off events. [2021-12-16 03:10:08,649 INFO L130 PetriNetUnfolder]: For 33174/33174 co-relation queries the response was YES. [2021-12-16 03:10:08,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13192 conditions, 2403 events. 994/2403 cut-off events. For 33174/33174 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16762 event pairs, 29 based on Foata normal form. 3/2395 useless extension candidates. Maximal degree in co-relation 13156. Up to 363 conditions per place. [2021-12-16 03:10:08,679 INFO L132 encePairwiseOnDemand]: 64/87 looper letters, 249 selfloop transitions, 865 changer transitions 17/1170 dead transitions. [2021-12-16 03:10:08,679 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 1170 transitions, 17335 flow [2021-12-16 03:10:08,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2021-12-16 03:10:08,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2021-12-16 03:10:08,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 11784 transitions. [2021-12-16 03:10:08,695 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.604679802955665 [2021-12-16 03:10:08,695 INFO L72 ComplementDD]: Start complementDD. Operand 224 states and 11784 transitions. [2021-12-16 03:10:08,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 224 states and 11784 transitions. [2021-12-16 03:10:08,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:08,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 224 states and 11784 transitions. [2021-12-16 03:10:08,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 225 states, 224 states have (on average 52.607142857142854) internal successors, (11784), 224 states have internal predecessors, (11784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:08,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 225 states, 225 states have (on average 87.0) internal successors, (19575), 225 states have internal predecessors, (19575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:08,747 INFO L81 ComplementDD]: Finished complementDD. Result has 225 states, 225 states have (on average 87.0) internal successors, (19575), 225 states have internal predecessors, (19575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:08,748 INFO L186 Difference]: Start difference. First operand has 168 places, 193 transitions, 2639 flow. Second operand 224 states and 11784 transitions. [2021-12-16 03:10:08,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 1170 transitions, 17335 flow [2021-12-16 03:10:08,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1170 transitions, 16399 flow, removed 44 selfloop flow, removed 10 redundant places. [2021-12-16 03:10:08,843 INFO L242 Difference]: Finished difference. Result has 437 places, 1001 transitions, 15355 flow [2021-12-16 03:10:08,844 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2449, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=224, PETRI_FLOW=15355, PETRI_PLACES=437, PETRI_TRANSITIONS=1001} [2021-12-16 03:10:08,844 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 360 predicate places. [2021-12-16 03:10:08,845 INFO L470 AbstractCegarLoop]: Abstraction has has 437 places, 1001 transitions, 15355 flow [2021-12-16 03:10:08,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:08,845 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:08,846 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] [2021-12-16 03:10:08,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 03:10:09,071 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,SelfDestructingSolverStorable33 [2021-12-16 03:10:09,071 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:09,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:09,072 INFO L85 PathProgramCache]: Analyzing trace with hash -950751903, now seen corresponding path program 2 times [2021-12-16 03:10:09,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:09,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001630790] [2021-12-16 03:10:09,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:09,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:09,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:09,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001630790] [2021-12-16 03:10:09,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001630790] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:10:09,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060756219] [2021-12-16 03:10:09,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:10:09,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:10:09,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:10:09,234 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) [2021-12-16 03:10:09,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 03:10:09,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:10:09,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:10:09,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 03:10:09,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:10:09,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:09,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:10:10,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:10,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060756219] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:10:10,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:10:10,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-16 03:10:10,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827663748] [2021-12-16 03:10:10,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:10:10,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-16 03:10:10,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:10,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-16 03:10:10,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-12-16 03:10:10,469 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-16 03:10:10,470 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 1001 transitions, 15355 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:10,471 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:10,471 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-16 03:10:10,471 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:13,368 INFO L129 PetriNetUnfolder]: 1130/3115 cut-off events. [2021-12-16 03:10:13,368 INFO L130 PetriNetUnfolder]: For 132492/132492 co-relation queries the response was YES. [2021-12-16 03:10:13,390 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24100 conditions, 3115 events. 1130/3115 cut-off events. For 132492/132492 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 25772 event pairs, 45 based on Foata normal form. 1/3103 useless extension candidates. Maximal degree in co-relation 24003. Up to 439 conditions per place. [2021-12-16 03:10:13,409 INFO L132 encePairwiseOnDemand]: 67/87 looper letters, 363 selfloop transitions, 771 changer transitions 45/1218 dead transitions. [2021-12-16 03:10:13,410 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 1218 transitions, 22357 flow [2021-12-16 03:10:13,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-16 03:10:13,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-12-16 03:10:13,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3489 transitions. [2021-12-16 03:10:13,414 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6266163793103449 [2021-12-16 03:10:13,414 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3489 transitions. [2021-12-16 03:10:13,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3489 transitions. [2021-12-16 03:10:13,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:13,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3489 transitions. [2021-12-16 03:10:13,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 54.515625) internal successors, (3489), 64 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:13,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 87.0) internal successors, (5655), 65 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:13,426 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 87.0) internal successors, (5655), 65 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:13,426 INFO L186 Difference]: Start difference. First operand has 437 places, 1001 transitions, 15355 flow. Second operand 64 states and 3489 transitions. [2021-12-16 03:10:13,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 1218 transitions, 22357 flow [2021-12-16 03:10:13,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 1218 transitions, 20878 flow, removed 486 selfloop flow, removed 14 redundant places. [2021-12-16 03:10:13,915 INFO L242 Difference]: Finished difference. Result has 498 places, 1047 transitions, 16785 flow [2021-12-16 03:10:13,916 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=14091, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=731, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=16785, PETRI_PLACES=498, PETRI_TRANSITIONS=1047} [2021-12-16 03:10:13,916 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 421 predicate places. [2021-12-16 03:10:13,916 INFO L470 AbstractCegarLoop]: Abstraction has has 498 places, 1047 transitions, 16785 flow [2021-12-16 03:10:13,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:13,917 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:13,917 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] [2021-12-16 03:10:13,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 03:10:14,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:10:14,172 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:14,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:14,172 INFO L85 PathProgramCache]: Analyzing trace with hash -987174667, now seen corresponding path program 3 times [2021-12-16 03:10:14,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:14,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807201505] [2021-12-16 03:10:14,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:14,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:14,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:14,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807201505] [2021-12-16 03:10:14,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807201505] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:10:14,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944255350] [2021-12-16 03:10:14,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 03:10:14,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:10:14,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:10:14,309 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) [2021-12-16 03:10:14,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 03:10:14,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-16 03:10:14,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:10:14,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 03:10:14,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:10:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:14,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:10:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:15,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944255350] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:10:15,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:10:15,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-16 03:10:15,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085388005] [2021-12-16 03:10:15,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:10:15,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-16 03:10:15,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:15,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-16 03:10:15,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-12-16 03:10:15,337 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-16 03:10:15,338 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 1047 transitions, 16785 flow. Second operand has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:15,338 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:15,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-16 03:10:15,338 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:18,014 INFO L129 PetriNetUnfolder]: 1111/3095 cut-off events. [2021-12-16 03:10:18,014 INFO L130 PetriNetUnfolder]: For 153022/153022 co-relation queries the response was YES. [2021-12-16 03:10:18,040 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25299 conditions, 3095 events. 1111/3095 cut-off events. For 153022/153022 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 25769 event pairs, 62 based on Foata normal form. 2/3070 useless extension candidates. Maximal degree in co-relation 25192. Up to 429 conditions per place. [2021-12-16 03:10:18,060 INFO L132 encePairwiseOnDemand]: 67/87 looper letters, 342 selfloop transitions, 783 changer transitions 31/1195 dead transitions. [2021-12-16 03:10:18,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 1195 transitions, 22661 flow [2021-12-16 03:10:18,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-16 03:10:18,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-12-16 03:10:18,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3577 transitions. [2021-12-16 03:10:18,113 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6229536746778126 [2021-12-16 03:10:18,113 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 3577 transitions. [2021-12-16 03:10:18,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 3577 transitions. [2021-12-16 03:10:18,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:18,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 3577 transitions. [2021-12-16 03:10:18,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 54.196969696969695) internal successors, (3577), 66 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:18,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 87.0) internal successors, (5829), 67 states have internal predecessors, (5829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:18,123 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 87.0) internal successors, (5829), 67 states have internal predecessors, (5829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:18,123 INFO L186 Difference]: Start difference. First operand has 498 places, 1047 transitions, 16785 flow. Second operand 66 states and 3577 transitions. [2021-12-16 03:10:18,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 1195 transitions, 22661 flow [2021-12-16 03:10:18,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 1195 transitions, 20879 flow, removed 165 selfloop flow, removed 43 redundant places. [2021-12-16 03:10:18,707 INFO L242 Difference]: Finished difference. Result has 528 places, 1064 transitions, 17300 flow [2021-12-16 03:10:18,708 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=15116, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1047, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=767, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=17300, PETRI_PLACES=528, PETRI_TRANSITIONS=1064} [2021-12-16 03:10:18,708 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 451 predicate places. [2021-12-16 03:10:18,709 INFO L470 AbstractCegarLoop]: Abstraction has has 528 places, 1064 transitions, 17300 flow [2021-12-16 03:10:18,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:18,709 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:18,710 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] [2021-12-16 03:10:18,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 03:10:18,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:10:18,916 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:18,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:18,916 INFO L85 PathProgramCache]: Analyzing trace with hash 259737615, now seen corresponding path program 4 times [2021-12-16 03:10:18,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:18,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573888988] [2021-12-16 03:10:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:18,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:19,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:19,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:19,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573888988] [2021-12-16 03:10:19,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573888988] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:10:19,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744033224] [2021-12-16 03:10:19,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 03:10:19,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:10:19,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:10:19,083 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) [2021-12-16 03:10:19,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 03:10:19,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 03:10:19,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:10:19,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-16 03:10:19,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:10:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:19,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:10:19,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:19,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744033224] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:10:19,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:10:19,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2021-12-16 03:10:19,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587382881] [2021-12-16 03:10:19,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:10:19,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 03:10:19,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:19,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 03:10:19,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 03:10:19,977 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-16 03:10:19,978 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 1064 transitions, 17300 flow. Second operand has 33 states, 33 states have (on average 50.93939393939394) internal successors, (1681), 33 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:19,978 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:19,978 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-16 03:10:19,978 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:21,641 INFO L129 PetriNetUnfolder]: 1109/3152 cut-off events. [2021-12-16 03:10:21,641 INFO L130 PetriNetUnfolder]: For 164308/164308 co-relation queries the response was YES. [2021-12-16 03:10:21,674 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25979 conditions, 3152 events. 1109/3152 cut-off events. For 164308/164308 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 26723 event pairs, 99 based on Foata normal form. 1/3122 useless extension candidates. Maximal degree in co-relation 25864. Up to 512 conditions per place. [2021-12-16 03:10:21,695 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 659 selfloop transitions, 462 changer transitions 23/1183 dead transitions. [2021-12-16 03:10:21,696 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 1183 transitions, 22394 flow [2021-12-16 03:10:21,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-16 03:10:21,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-16 03:10:21,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2107 transitions. [2021-12-16 03:10:21,698 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6373260738052027 [2021-12-16 03:10:21,698 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2107 transitions. [2021-12-16 03:10:21,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2107 transitions. [2021-12-16 03:10:21,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:21,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2107 transitions. [2021-12-16 03:10:21,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.44736842105263) internal successors, (2107), 38 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:21,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 87.0) internal successors, (3393), 39 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:21,704 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 87.0) internal successors, (3393), 39 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:21,705 INFO L186 Difference]: Start difference. First operand has 528 places, 1064 transitions, 17300 flow. Second operand 38 states and 2107 transitions. [2021-12-16 03:10:21,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 1183 transitions, 22394 flow [2021-12-16 03:10:22,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 1183 transitions, 20648 flow, removed 134 selfloop flow, removed 52 redundant places. [2021-12-16 03:10:22,387 INFO L242 Difference]: Finished difference. Result has 511 places, 1074 transitions, 16806 flow [2021-12-16 03:10:22,388 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=15671, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1064, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=448, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=16806, PETRI_PLACES=511, PETRI_TRANSITIONS=1074} [2021-12-16 03:10:22,388 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 434 predicate places. [2021-12-16 03:10:22,388 INFO L470 AbstractCegarLoop]: Abstraction has has 511 places, 1074 transitions, 16806 flow [2021-12-16 03:10:22,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.93939393939394) internal successors, (1681), 33 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:22,389 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:22,389 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] [2021-12-16 03:10:22,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 03:10:22,603 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,SelfDestructingSolverStorable36 [2021-12-16 03:10:22,604 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:22,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:22,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1637776173, now seen corresponding path program 5 times [2021-12-16 03:10:22,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:22,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511438770] [2021-12-16 03:10:22,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:22,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:22,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:22,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511438770] [2021-12-16 03:10:22,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511438770] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:10:22,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868237251] [2021-12-16 03:10:22,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 03:10:22,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:10:22,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:10:22,792 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) [2021-12-16 03:10:22,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 03:10:22,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:10:22,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:10:22,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 03:10:22,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:10:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:23,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:10:23,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868237251] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:10:23,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:10:23,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [16] total 25 [2021-12-16 03:10:23,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590263007] [2021-12-16 03:10:23,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:10:23,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 03:10:23,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:23,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 03:10:23,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-12-16 03:10:23,217 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-16 03:10:23,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 1074 transitions, 16806 flow. Second operand has 15 states, 15 states have (on average 52.93333333333333) internal successors, (794), 15 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:23,218 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:23,218 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-16 03:10:23,218 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:24,212 INFO L129 PetriNetUnfolder]: 1115/3163 cut-off events. [2021-12-16 03:10:24,212 INFO L130 PetriNetUnfolder]: For 152945/152945 co-relation queries the response was YES. [2021-12-16 03:10:24,239 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25341 conditions, 3163 events. 1115/3163 cut-off events. For 152945/152945 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 26647 event pairs, 96 based on Foata normal form. 3/3128 useless extension candidates. Maximal degree in co-relation 25227. Up to 952 conditions per place. [2021-12-16 03:10:24,256 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 604 selfloop transitions, 556 changer transitions 21/1222 dead transitions. [2021-12-16 03:10:24,256 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 1222 transitions, 21792 flow [2021-12-16 03:10:24,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 03:10:24,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-16 03:10:24,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 979 transitions. [2021-12-16 03:10:24,258 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6619337390128465 [2021-12-16 03:10:24,258 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 979 transitions. [2021-12-16 03:10:24,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 979 transitions. [2021-12-16 03:10:24,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:24,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 979 transitions. [2021-12-16 03:10:24,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 57.588235294117645) internal successors, (979), 17 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:24,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 87.0) internal successors, (1566), 18 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:24,262 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 87.0) internal successors, (1566), 18 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:24,262 INFO L186 Difference]: Start difference. First operand has 511 places, 1074 transitions, 16806 flow. Second operand 17 states and 979 transitions. [2021-12-16 03:10:24,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 1222 transitions, 21792 flow [2021-12-16 03:10:25,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 1222 transitions, 21001 flow, removed 37 selfloop flow, removed 20 redundant places. [2021-12-16 03:10:25,056 INFO L242 Difference]: Finished difference. Result has 507 places, 1130 transitions, 18193 flow [2021-12-16 03:10:25,057 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=16043, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=499, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=18193, PETRI_PLACES=507, PETRI_TRANSITIONS=1130} [2021-12-16 03:10:25,057 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 430 predicate places. [2021-12-16 03:10:25,057 INFO L470 AbstractCegarLoop]: Abstraction has has 507 places, 1130 transitions, 18193 flow [2021-12-16 03:10:25,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.93333333333333) internal successors, (794), 15 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:25,058 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:25,058 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] [2021-12-16 03:10:25,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-16 03:10:25,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-16 03:10:25,259 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:25,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:25,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1416816649, now seen corresponding path program 6 times [2021-12-16 03:10:25,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:25,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306104922] [2021-12-16 03:10:25,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:25,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:25,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:25,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306104922] [2021-12-16 03:10:25,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306104922] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:10:25,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623686866] [2021-12-16 03:10:25,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 03:10:25,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:10:25,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:10:25,426 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:10:25,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 03:10:25,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-16 03:10:25,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:10:25,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 03:10:25,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:10:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:25,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:10:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:26,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623686866] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:10:26,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:10:26,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-16 03:10:26,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869001994] [2021-12-16 03:10:26,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:10:26,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-16 03:10:26,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:26,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-16 03:10:26,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-12-16 03:10:26,500 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-16 03:10:26,501 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 1130 transitions, 18193 flow. Second operand has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:26,502 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:26,502 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-16 03:10:26,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:30,084 INFO L129 PetriNetUnfolder]: 1212/3433 cut-off events. [2021-12-16 03:10:30,084 INFO L130 PetriNetUnfolder]: For 185084/185084 co-relation queries the response was YES. [2021-12-16 03:10:30,110 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29019 conditions, 3433 events. 1212/3433 cut-off events. For 185084/185084 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 29515 event pairs, 68 based on Foata normal form. 2/3400 useless extension candidates. Maximal degree in co-relation 28903. Up to 418 conditions per place. [2021-12-16 03:10:30,127 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 361 selfloop transitions, 951 changer transitions 23/1374 dead transitions. [2021-12-16 03:10:30,127 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 1374 transitions, 27130 flow [2021-12-16 03:10:30,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-12-16 03:10:30,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-12-16 03:10:30,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 4736 transitions. [2021-12-16 03:10:30,131 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6185997910135841 [2021-12-16 03:10:30,132 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 4736 transitions. [2021-12-16 03:10:30,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 4736 transitions. [2021-12-16 03:10:30,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:30,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 4736 transitions. [2021-12-16 03:10:30,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 53.81818181818182) internal successors, (4736), 88 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:30,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 87.0) internal successors, (7743), 89 states have internal predecessors, (7743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:30,144 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 87.0) internal successors, (7743), 89 states have internal predecessors, (7743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:30,144 INFO L186 Difference]: Start difference. First operand has 507 places, 1130 transitions, 18193 flow. Second operand 88 states and 4736 transitions. [2021-12-16 03:10:30,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 1374 transitions, 27130 flow [2021-12-16 03:10:31,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 585 places, 1374 transitions, 26481 flow, removed 203 selfloop flow, removed 6 redundant places. [2021-12-16 03:10:31,034 INFO L242 Difference]: Finished difference. Result has 605 places, 1225 transitions, 21679 flow [2021-12-16 03:10:31,035 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=17864, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=854, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=21679, PETRI_PLACES=605, PETRI_TRANSITIONS=1225} [2021-12-16 03:10:31,037 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 528 predicate places. [2021-12-16 03:10:31,037 INFO L470 AbstractCegarLoop]: Abstraction has has 605 places, 1225 transitions, 21679 flow [2021-12-16 03:10:31,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:31,037 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:31,037 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] [2021-12-16 03:10:31,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 03:10:31,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-16 03:10:31,261 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:31,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:31,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1876863235, now seen corresponding path program 7 times [2021-12-16 03:10:31,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:31,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587155549] [2021-12-16 03:10:31,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:31,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:31,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:31,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587155549] [2021-12-16 03:10:31,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587155549] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:10:31,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803828412] [2021-12-16 03:10:31,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 03:10:31,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:10:31,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:10:31,448 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:10:31,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 03:10:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:31,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 03:10:31,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:10:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:31,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:10:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:32,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803828412] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:10:32,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:10:32,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-16 03:10:32,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437570166] [2021-12-16 03:10:32,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:10:32,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-16 03:10:32,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:10:32,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-16 03:10:32,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-12-16 03:10:32,399 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-16 03:10:32,400 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 1225 transitions, 21679 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:32,400 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:10:32,400 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-16 03:10:32,400 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:35,187 INFO L129 PetriNetUnfolder]: 1195/3502 cut-off events. [2021-12-16 03:10:35,187 INFO L130 PetriNetUnfolder]: For 185759/185759 co-relation queries the response was YES. [2021-12-16 03:10:35,229 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30095 conditions, 3502 events. 1195/3502 cut-off events. For 185759/185759 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 30511 event pairs, 56 based on Foata normal form. 1/3479 useless extension candidates. Maximal degree in co-relation 29964. Up to 471 conditions per place. [2021-12-16 03:10:35,247 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 441 selfloop transitions, 827 changer transitions 51/1358 dead transitions. [2021-12-16 03:10:35,247 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 656 places, 1358 transitions, 28424 flow [2021-12-16 03:10:35,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-16 03:10:35,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-12-16 03:10:35,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3348 transitions. [2021-12-16 03:10:35,250 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6308648954211419 [2021-12-16 03:10:35,250 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3348 transitions. [2021-12-16 03:10:35,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3348 transitions. [2021-12-16 03:10:35,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:35,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3348 transitions. [2021-12-16 03:10:35,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 54.885245901639344) internal successors, (3348), 61 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:35,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 87.0) internal successors, (5394), 62 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:35,259 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 87.0) internal successors, (5394), 62 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:10:35,259 INFO L186 Difference]: Start difference. First operand has 605 places, 1225 transitions, 21679 flow. Second operand 61 states and 3348 transitions. [2021-12-16 03:10:35,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 656 places, 1358 transitions, 28424 flow