./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-figure1-alt.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 fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:46:13,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:46:13,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:46:13,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:46:13,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:46:13,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:46:13,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:46:13,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:46:13,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:46:13,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:46:13,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:46:13,164 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:46:13,165 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:46:13,165 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:46:13,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:46:13,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:46:13,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:46:13,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:46:13,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:46:13,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:46:13,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:46:13,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:46:13,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:46:13,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:46:13,176 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:46:13,176 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:46:13,177 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:46:13,177 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:46:13,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:46:13,178 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:46:13,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:46:13,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:46:13,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:46:13,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:46:13,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:46:13,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:46:13,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:46:13,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:46:13,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:46:13,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:46:13,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:46:13,188 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:46:13,200 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:46:13,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:46:13,201 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:46:13,201 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:46:13,201 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:46:13,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:46:13,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:46:13,202 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:46:13,202 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:46:13,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:46:13,202 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:46:13,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:46:13,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:46:13,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:46:13,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:46:13,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:46:13,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:46:13,203 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:46:13,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:46:13,204 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:46:13,204 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:46:13,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:46:13,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:46:13,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:46:13,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:46:13,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:46:13,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:46:13,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:46:13,205 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:46:13,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:46:13,205 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:46:13,205 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:46:13,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:46:13,206 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:46:13,206 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 [2021-12-22 13:46:13,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:46:13,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:46:13,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:46:13,401 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:46:13,401 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:46:13,402 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2021-12-22 13:46:13,479 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7ef71909/5e62ff666e8f4989a3ccfcae8abbf3c7/FLAG318a69c2b [2021-12-22 13:46:13,805 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:46:13,806 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2021-12-22 13:46:13,815 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7ef71909/5e62ff666e8f4989a3ccfcae8abbf3c7/FLAG318a69c2b [2021-12-22 13:46:13,826 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7ef71909/5e62ff666e8f4989a3ccfcae8abbf3c7 [2021-12-22 13:46:13,829 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:46:13,831 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:46:13,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:46:13,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:46:13,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:46:13,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:46:13" (1/1) ... [2021-12-22 13:46:13,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@438e527d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:13, skipping insertion in model container [2021-12-22 13:46:13,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:46:13" (1/1) ... [2021-12-22 13:46:13,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:46:13,855 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:46:14,029 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/popl20-figure1-alt.wvr.c[2087,2100] [2021-12-22 13:46:14,032 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:46:14,037 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:46:14,058 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/popl20-figure1-alt.wvr.c[2087,2100] [2021-12-22 13:46:14,059 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:46:14,067 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:46:14,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:14 WrapperNode [2021-12-22 13:46:14,067 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:46:14,068 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:46:14,068 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:46:14,069 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:46:14,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:14" (1/1) ... [2021-12-22 13:46:14,077 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:14" (1/1) ... [2021-12-22 13:46:14,095 INFO L137 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 76 [2021-12-22 13:46:14,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:46:14,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:46:14,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:46:14,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:46:14,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:14" (1/1) ... [2021-12-22 13:46:14,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:14" (1/1) ... [2021-12-22 13:46:14,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:14" (1/1) ... [2021-12-22 13:46:14,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:14" (1/1) ... [2021-12-22 13:46:14,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:14" (1/1) ... [2021-12-22 13:46:14,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:14" (1/1) ... [2021-12-22 13:46:14,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:14" (1/1) ... [2021-12-22 13:46:14,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:46:14,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:46:14,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:46:14,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:46:14,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:14" (1/1) ... [2021-12-22 13:46:14,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:46:14,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:14,138 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 13:46:14,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 13:46:14,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:46:14,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-22 13:46:14,173 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-22 13:46:14,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-22 13:46:14,174 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-22 13:46:14,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:46:14,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:46:14,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:46:14,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-22 13:46:14,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-22 13:46:14,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:46:14,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:46:14,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:46:14,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:46:14,176 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-22 13:46:14,234 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:46:14,235 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:46:14,390 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:46:14,414 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:46:14,414 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 13:46:14,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:46:14 BoogieIcfgContainer [2021-12-22 13:46:14,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:46:14,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:46:14,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:46:14,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:46:14,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:46:13" (1/3) ... [2021-12-22 13:46:14,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12599e91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:46:14, skipping insertion in model container [2021-12-22 13:46:14,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:14" (2/3) ... [2021-12-22 13:46:14,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12599e91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:46:14, skipping insertion in model container [2021-12-22 13:46:14,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:46:14" (3/3) ... [2021-12-22 13:46:14,423 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2021-12-22 13:46:14,430 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-22 13:46:14,431 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:46:14,431 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:46:14,431 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-22 13:46:14,465 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,465 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,466 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,466 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,466 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,466 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,467 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,467 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,467 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,467 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,467 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,468 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,468 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,468 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,468 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,468 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,469 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,469 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,469 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,469 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,469 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,469 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,470 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,470 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,470 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,470 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,471 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,471 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,471 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,471 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,472 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,472 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,472 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,472 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,472 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,473 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,473 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,473 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,473 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,473 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,474 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,474 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,474 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,474 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,474 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,474 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,475 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,475 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,477 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,477 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,477 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,477 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,477 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,477 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,478 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,478 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,478 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,479 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,479 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,479 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:14,481 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-22 13:46:14,519 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:46:14,523 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 13:46:14,523 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-22 13:46:14,530 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 194 flow [2021-12-22 13:46:14,588 INFO L129 PetriNetUnfolder]: 6/87 cut-off events. [2021-12-22 13:46:14,588 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:46:14,590 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 6/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2021-12-22 13:46:14,590 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 194 flow [2021-12-22 13:46:14,593 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 78 transitions, 168 flow [2021-12-22 13:46:14,606 INFO L129 PetriNetUnfolder]: 6/77 cut-off events. [2021-12-22 13:46:14,609 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:46:14,612 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:14,613 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] [2021-12-22 13:46:14,613 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:14,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:14,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1515800342, now seen corresponding path program 1 times [2021-12-22 13:46:14,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:14,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544187362] [2021-12-22 13:46:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:14,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:14,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:14,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544187362] [2021-12-22 13:46:14,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544187362] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:46:14,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:46:14,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:46:14,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665056615] [2021-12-22 13:46:14,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:46:14,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 13:46:14,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:14,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 13:46:14,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:46:14,797 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 89 [2021-12-22 13:46:14,800 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 168 flow. Second operand has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:14,800 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:14,800 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 89 [2021-12-22 13:46:14,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:14,846 INFO L129 PetriNetUnfolder]: 11/107 cut-off events. [2021-12-22 13:46:14,846 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2021-12-22 13:46:14,847 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 107 events. 11/107 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 146 event pairs, 3 based on Foata normal form. 11/109 useless extension candidates. Maximal degree in co-relation 67. Up to 19 conditions per place. [2021-12-22 13:46:14,849 INFO L132 encePairwiseOnDemand]: 85/89 looper letters, 6 selfloop transitions, 0 changer transitions 2/74 dead transitions. [2021-12-22 13:46:14,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 172 flow [2021-12-22 13:46:14,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 13:46:14,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-22 13:46:14,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 166 transitions. [2021-12-22 13:46:14,858 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9325842696629213 [2021-12-22 13:46:14,859 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 166 transitions. [2021-12-22 13:46:14,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 166 transitions. [2021-12-22 13:46:14,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:14,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 166 transitions. [2021-12-22 13:46:14,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:14,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:14,870 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:14,871 INFO L186 Difference]: Start difference. First operand has 79 places, 78 transitions, 168 flow. Second operand 2 states and 166 transitions. [2021-12-22 13:46:14,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 172 flow [2021-12-22 13:46:14,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-22 13:46:14,888 INFO L242 Difference]: Finished difference. Result has 76 places, 72 transitions, 148 flow [2021-12-22 13:46:14,889 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=148, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2021-12-22 13:46:14,893 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2021-12-22 13:46:14,893 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 148 flow [2021-12-22 13:46:14,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:14,894 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:14,894 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] [2021-12-22 13:46:14,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:46:14,895 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:14,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:14,896 INFO L85 PathProgramCache]: Analyzing trace with hash -79113043, now seen corresponding path program 1 times [2021-12-22 13:46:14,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:14,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434217175] [2021-12-22 13:46:14,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:14,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:15,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:15,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:15,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434217175] [2021-12-22 13:46:15,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434217175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:46:15,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:46:15,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-22 13:46:15,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398807497] [2021-12-22 13:46:15,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:46:15,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 13:46:15,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:15,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 13:46:15,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-22 13:46:15,435 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-22 13:46:15,436 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 148 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:15,436 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:15,436 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-22 13:46:15,436 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:15,819 INFO L129 PetriNetUnfolder]: 67/248 cut-off events. [2021-12-22 13:46:15,819 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2021-12-22 13:46:15,821 INFO L84 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 248 events. 67/248 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 955 event pairs, 34 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 417. Up to 102 conditions per place. [2021-12-22 13:46:15,822 INFO L132 encePairwiseOnDemand]: 76/89 looper letters, 43 selfloop transitions, 11 changer transitions 6/103 dead transitions. [2021-12-22 13:46:15,822 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 103 transitions, 337 flow [2021-12-22 13:46:15,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:46:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-22 13:46:15,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 698 transitions. [2021-12-22 13:46:15,828 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.653558052434457 [2021-12-22 13:46:15,829 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 698 transitions. [2021-12-22 13:46:15,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 698 transitions. [2021-12-22 13:46:15,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:15,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 698 transitions. [2021-12-22 13:46:15,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.166666666666664) internal successors, (698), 12 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:15,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:15,835 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:15,835 INFO L186 Difference]: Start difference. First operand has 76 places, 72 transitions, 148 flow. Second operand 12 states and 698 transitions. [2021-12-22 13:46:15,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 103 transitions, 337 flow [2021-12-22 13:46:15,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 103 transitions, 337 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:46:15,838 INFO L242 Difference]: Finished difference. Result has 92 places, 79 transitions, 213 flow [2021-12-22 13:46:15,838 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=213, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2021-12-22 13:46:15,839 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 13 predicate places. [2021-12-22 13:46:15,839 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 213 flow [2021-12-22 13:46:15,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:15,840 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:15,840 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:46:15,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:46:15,841 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:15,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:15,841 INFO L85 PathProgramCache]: Analyzing trace with hash -42932599, now seen corresponding path program 2 times [2021-12-22 13:46:15,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:15,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862166196] [2021-12-22 13:46:15,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:15,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:16,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:16,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862166196] [2021-12-22 13:46:16,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862166196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:46:16,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:46:16,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-22 13:46:16,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430565590] [2021-12-22 13:46:16,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:46:16,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 13:46:16,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:16,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 13:46:16,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-22 13:46:16,228 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-22 13:46:16,229 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 213 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:16,229 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:16,229 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-22 13:46:16,229 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:16,488 INFO L129 PetriNetUnfolder]: 68/264 cut-off events. [2021-12-22 13:46:16,489 INFO L130 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2021-12-22 13:46:16,490 INFO L84 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 264 events. 68/264 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1119 event pairs, 36 based on Foata normal form. 1/262 useless extension candidates. Maximal degree in co-relation 531. Up to 102 conditions per place. [2021-12-22 13:46:16,491 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 40 selfloop transitions, 11 changer transitions 11/105 dead transitions. [2021-12-22 13:46:16,491 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 105 transitions, 429 flow [2021-12-22 13:46:16,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:46:16,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-22 13:46:16,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 695 transitions. [2021-12-22 13:46:16,493 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.650749063670412 [2021-12-22 13:46:16,493 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 695 transitions. [2021-12-22 13:46:16,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 695 transitions. [2021-12-22 13:46:16,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:16,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 695 transitions. [2021-12-22 13:46:16,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:16,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:16,497 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:16,497 INFO L186 Difference]: Start difference. First operand has 92 places, 79 transitions, 213 flow. Second operand 12 states and 695 transitions. [2021-12-22 13:46:16,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 105 transitions, 429 flow [2021-12-22 13:46:16,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 105 transitions, 407 flow, removed 8 selfloop flow, removed 6 redundant places. [2021-12-22 13:46:16,500 INFO L242 Difference]: Finished difference. Result has 100 places, 80 transitions, 247 flow [2021-12-22 13:46:16,500 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=247, PETRI_PLACES=100, PETRI_TRANSITIONS=80} [2021-12-22 13:46:16,501 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 21 predicate places. [2021-12-22 13:46:16,501 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 80 transitions, 247 flow [2021-12-22 13:46:16,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:16,501 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:16,502 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] [2021-12-22 13:46:16,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:46:16,502 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:16,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:16,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1623942775, now seen corresponding path program 3 times [2021-12-22 13:46:16,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:16,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111439711] [2021-12-22 13:46:16,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:16,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:16,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:16,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111439711] [2021-12-22 13:46:16,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111439711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:46:16,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:46:16,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-22 13:46:16,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171371437] [2021-12-22 13:46:16,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:46:16,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 13:46:16,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:16,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 13:46:16,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-12-22 13:46:16,764 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-22 13:46:16,764 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 80 transitions, 247 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:16,765 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:16,765 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-22 13:46:16,765 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:17,089 INFO L129 PetriNetUnfolder]: 72/299 cut-off events. [2021-12-22 13:46:17,089 INFO L130 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2021-12-22 13:46:17,090 INFO L84 FinitePrefix]: Finished finitePrefix Result has 670 conditions, 299 events. 72/299 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1369 event pairs, 41 based on Foata normal form. 1/295 useless extension candidates. Maximal degree in co-relation 655. Up to 105 conditions per place. [2021-12-22 13:46:17,091 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 48 selfloop transitions, 14 changer transitions 8/113 dead transitions. [2021-12-22 13:46:17,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 519 flow [2021-12-22 13:46:17,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:46:17,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-22 13:46:17,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 704 transitions. [2021-12-22 13:46:17,093 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6591760299625468 [2021-12-22 13:46:17,093 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 704 transitions. [2021-12-22 13:46:17,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 704 transitions. [2021-12-22 13:46:17,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:17,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 704 transitions. [2021-12-22 13:46:17,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.666666666666664) internal successors, (704), 12 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:17,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:17,097 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:17,097 INFO L186 Difference]: Start difference. First operand has 100 places, 80 transitions, 247 flow. Second operand 12 states and 704 transitions. [2021-12-22 13:46:17,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 519 flow [2021-12-22 13:46:17,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 113 transitions, 474 flow, removed 14 selfloop flow, removed 9 redundant places. [2021-12-22 13:46:17,100 INFO L242 Difference]: Finished difference. Result has 104 places, 84 transitions, 301 flow [2021-12-22 13:46:17,100 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=301, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2021-12-22 13:46:17,100 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 25 predicate places. [2021-12-22 13:46:17,101 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 301 flow [2021-12-22 13:46:17,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:17,101 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:17,101 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] [2021-12-22 13:46:17,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:46:17,102 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:17,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:17,102 INFO L85 PathProgramCache]: Analyzing trace with hash -211036747, now seen corresponding path program 4 times [2021-12-22 13:46:17,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:17,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143964265] [2021-12-22 13:46:17,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:17,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:17,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:17,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143964265] [2021-12-22 13:46:17,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143964265] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:46:17,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:46:17,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-22 13:46:17,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308489251] [2021-12-22 13:46:17,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:46:17,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 13:46:17,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:17,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 13:46:17,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-12-22 13:46:17,365 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-22 13:46:17,365 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 301 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:17,365 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:17,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-22 13:46:17,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:17,689 INFO L129 PetriNetUnfolder]: 71/291 cut-off events. [2021-12-22 13:46:17,689 INFO L130 PetriNetUnfolder]: For 218/218 co-relation queries the response was YES. [2021-12-22 13:46:17,690 INFO L84 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 291 events. 71/291 cut-off events. For 218/218 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1313 event pairs, 34 based on Foata normal form. 1/286 useless extension candidates. Maximal degree in co-relation 664. Up to 105 conditions per place. [2021-12-22 13:46:17,691 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 50 selfloop transitions, 15 changer transitions 6/114 dead transitions. [2021-12-22 13:46:17,691 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 114 transitions, 559 flow [2021-12-22 13:46:17,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:46:17,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-22 13:46:17,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 703 transitions. [2021-12-22 13:46:17,693 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6582397003745318 [2021-12-22 13:46:17,693 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 703 transitions. [2021-12-22 13:46:17,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 703 transitions. [2021-12-22 13:46:17,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:17,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 703 transitions. [2021-12-22 13:46:17,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.583333333333336) internal successors, (703), 12 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:17,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:17,696 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:17,696 INFO L186 Difference]: Start difference. First operand has 104 places, 84 transitions, 301 flow. Second operand 12 states and 703 transitions. [2021-12-22 13:46:17,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 114 transitions, 559 flow [2021-12-22 13:46:17,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 114 transitions, 520 flow, removed 11 selfloop flow, removed 8 redundant places. [2021-12-22 13:46:17,699 INFO L242 Difference]: Finished difference. Result has 110 places, 86 transitions, 352 flow [2021-12-22 13:46:17,700 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=352, PETRI_PLACES=110, PETRI_TRANSITIONS=86} [2021-12-22 13:46:17,700 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 31 predicate places. [2021-12-22 13:46:17,700 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 86 transitions, 352 flow [2021-12-22 13:46:17,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:17,701 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:17,701 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] [2021-12-22 13:46:17,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:46:17,701 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:17,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:17,702 INFO L85 PathProgramCache]: Analyzing trace with hash -773440099, now seen corresponding path program 5 times [2021-12-22 13:46:17,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:17,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403896149] [2021-12-22 13:46:17,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:17,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:17,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:17,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:17,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403896149] [2021-12-22 13:46:17,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403896149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:46:17,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:46:17,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-22 13:46:17,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307220204] [2021-12-22 13:46:17,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:46:17,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 13:46:17,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:17,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 13:46:17,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-22 13:46:17,999 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-22 13:46:18,000 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 86 transitions, 352 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:18,000 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:18,000 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-22 13:46:18,000 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:18,273 INFO L129 PetriNetUnfolder]: 71/283 cut-off events. [2021-12-22 13:46:18,273 INFO L130 PetriNetUnfolder]: For 320/332 co-relation queries the response was YES. [2021-12-22 13:46:18,274 INFO L84 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 283 events. 71/283 cut-off events. For 320/332 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1260 event pairs, 34 based on Foata normal form. 4/282 useless extension candidates. Maximal degree in co-relation 676. Up to 105 conditions per place. [2021-12-22 13:46:18,275 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 42 selfloop transitions, 14 changer transitions 9/108 dead transitions. [2021-12-22 13:46:18,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 563 flow [2021-12-22 13:46:18,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:46:18,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-22 13:46:18,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 696 transitions. [2021-12-22 13:46:18,277 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.651685393258427 [2021-12-22 13:46:18,277 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 696 transitions. [2021-12-22 13:46:18,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 696 transitions. [2021-12-22 13:46:18,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:18,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 696 transitions. [2021-12-22 13:46:18,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.0) internal successors, (696), 12 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) [2021-12-22 13:46:18,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:18,280 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:18,280 INFO L186 Difference]: Start difference. First operand has 110 places, 86 transitions, 352 flow. Second operand 12 states and 696 transitions. [2021-12-22 13:46:18,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 563 flow [2021-12-22 13:46:18,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 108 transitions, 526 flow, removed 10 selfloop flow, removed 8 redundant places. [2021-12-22 13:46:18,283 INFO L242 Difference]: Finished difference. Result has 115 places, 86 transitions, 368 flow [2021-12-22 13:46:18,284 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=368, PETRI_PLACES=115, PETRI_TRANSITIONS=86} [2021-12-22 13:46:18,284 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 36 predicate places. [2021-12-22 13:46:18,284 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 86 transitions, 368 flow [2021-12-22 13:46:18,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:18,285 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:18,285 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] [2021-12-22 13:46:18,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:46:18,285 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:18,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:18,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1009642839, now seen corresponding path program 6 times [2021-12-22 13:46:18,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:18,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061724739] [2021-12-22 13:46:18,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:18,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:18,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:18,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061724739] [2021-12-22 13:46:18,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061724739] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:46:18,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:46:18,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-22 13:46:18,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731332086] [2021-12-22 13:46:18,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:46:18,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 13:46:18,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:18,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 13:46:18,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-22 13:46:18,552 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-22 13:46:18,553 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 86 transitions, 368 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:18,553 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:18,553 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-22 13:46:18,553 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:18,839 INFO L129 PetriNetUnfolder]: 68/248 cut-off events. [2021-12-22 13:46:18,839 INFO L130 PetriNetUnfolder]: For 320/320 co-relation queries the response was YES. [2021-12-22 13:46:18,840 INFO L84 FinitePrefix]: Finished finitePrefix Result has 640 conditions, 248 events. 68/248 cut-off events. For 320/320 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 972 event pairs, 34 based on Foata normal form. 1/244 useless extension candidates. Maximal degree in co-relation 618. Up to 105 conditions per place. [2021-12-22 13:46:18,841 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 34 selfloop transitions, 14 changer transitions 11/102 dead transitions. [2021-12-22 13:46:18,841 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 102 transitions, 547 flow [2021-12-22 13:46:18,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:46:18,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-22 13:46:18,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 690 transitions. [2021-12-22 13:46:18,843 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6460674157303371 [2021-12-22 13:46:18,843 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 690 transitions. [2021-12-22 13:46:18,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 690 transitions. [2021-12-22 13:46:18,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:18,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 690 transitions. [2021-12-22 13:46:18,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.5) internal successors, (690), 12 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:18,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:18,846 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:18,846 INFO L186 Difference]: Start difference. First operand has 115 places, 86 transitions, 368 flow. Second operand 12 states and 690 transitions. [2021-12-22 13:46:18,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 102 transitions, 547 flow [2021-12-22 13:46:18,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 102 transitions, 499 flow, removed 9 selfloop flow, removed 12 redundant places. [2021-12-22 13:46:18,849 INFO L242 Difference]: Finished difference. Result has 114 places, 85 transitions, 350 flow [2021-12-22 13:46:18,849 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=350, PETRI_PLACES=114, PETRI_TRANSITIONS=85} [2021-12-22 13:46:18,850 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 35 predicate places. [2021-12-22 13:46:18,850 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 85 transitions, 350 flow [2021-12-22 13:46:18,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:18,850 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:18,850 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] [2021-12-22 13:46:18,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:46:18,851 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:18,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:18,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1492579821, now seen corresponding path program 1 times [2021-12-22 13:46:18,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:18,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219031689] [2021-12-22 13:46:18,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:18,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:19,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:19,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219031689] [2021-12-22 13:46:19,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219031689] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:19,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538644986] [2021-12-22 13:46:19,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:19,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:19,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:19,080 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:46:19,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:46:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:19,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 13:46:19,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:19,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:46:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:20,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538644986] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:46:20,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:46:20,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-22 13:46:20,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642884618] [2021-12-22 13:46:20,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:46:20,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-22 13:46:20,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:20,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-22 13:46:20,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-12-22 13:46:20,419 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-22 13:46:20,420 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 85 transitions, 350 flow. Second operand has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:20,421 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:20,421 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-22 13:46:20,421 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:22,097 INFO L129 PetriNetUnfolder]: 168/592 cut-off events. [2021-12-22 13:46:22,098 INFO L130 PetriNetUnfolder]: For 377/377 co-relation queries the response was YES. [2021-12-22 13:46:22,099 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1318 conditions, 592 events. 168/592 cut-off events. For 377/377 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3253 event pairs, 9 based on Foata normal form. 13/605 useless extension candidates. Maximal degree in co-relation 1297. Up to 111 conditions per place. [2021-12-22 13:46:22,101 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 114 selfloop transitions, 82 changer transitions 13/251 dead transitions. [2021-12-22 13:46:22,101 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 251 transitions, 1334 flow [2021-12-22 13:46:22,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-22 13:46:22,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-12-22 13:46:22,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2702 transitions. [2021-12-22 13:46:22,107 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6324906367041199 [2021-12-22 13:46:22,107 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2702 transitions. [2021-12-22 13:46:22,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2702 transitions. [2021-12-22 13:46:22,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:22,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2702 transitions. [2021-12-22 13:46:22,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 56.291666666666664) internal successors, (2702), 48 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:22,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:22,120 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:22,120 INFO L186 Difference]: Start difference. First operand has 114 places, 85 transitions, 350 flow. Second operand 48 states and 2702 transitions. [2021-12-22 13:46:22,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 251 transitions, 1334 flow [2021-12-22 13:46:22,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 251 transitions, 1228 flow, removed 24 selfloop flow, removed 16 redundant places. [2021-12-22 13:46:22,126 INFO L242 Difference]: Finished difference. Result has 152 places, 152 transitions, 752 flow [2021-12-22 13:46:22,126 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=752, PETRI_PLACES=152, PETRI_TRANSITIONS=152} [2021-12-22 13:46:22,128 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 73 predicate places. [2021-12-22 13:46:22,128 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 152 transitions, 752 flow [2021-12-22 13:46:22,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:22,129 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:22,129 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] [2021-12-22 13:46:22,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 13:46:22,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:22,346 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:22,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:22,346 INFO L85 PathProgramCache]: Analyzing trace with hash 330352477, now seen corresponding path program 2 times [2021-12-22 13:46:22,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:22,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454014599] [2021-12-22 13:46:22,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:22,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:22,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:22,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454014599] [2021-12-22 13:46:22,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454014599] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:22,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980706498] [2021-12-22 13:46:22,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:46:22,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:22,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:22,640 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:46:22,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:46:22,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:46:22,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:46:22,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 13:46:22,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:23,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:46:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:23,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980706498] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:46:23,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:46:23,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-22 13:46:23,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298949470] [2021-12-22 13:46:23,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:46:23,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-22 13:46:23,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:23,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-22 13:46:23,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2021-12-22 13:46:23,848 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-22 13:46:23,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 152 transitions, 752 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:23,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:23,850 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-22 13:46:23,850 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:25,013 INFO L129 PetriNetUnfolder]: 210/752 cut-off events. [2021-12-22 13:46:25,014 INFO L130 PetriNetUnfolder]: For 677/677 co-relation queries the response was YES. [2021-12-22 13:46:25,016 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2086 conditions, 752 events. 210/752 cut-off events. For 677/677 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4583 event pairs, 22 based on Foata normal form. 1/751 useless extension candidates. Maximal degree in co-relation 2061. Up to 213 conditions per place. [2021-12-22 13:46:25,019 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 100 selfloop transitions, 122 changer transitions 6/270 dead transitions. [2021-12-22 13:46:25,020 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 270 transitions, 1798 flow [2021-12-22 13:46:25,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-22 13:46:25,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-22 13:46:25,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2186 transitions. [2021-12-22 13:46:25,023 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6297896859694613 [2021-12-22 13:46:25,023 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2186 transitions. [2021-12-22 13:46:25,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2186 transitions. [2021-12-22 13:46:25,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:25,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2186 transitions. [2021-12-22 13:46:25,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.05128205128205) internal successors, (2186), 39 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:25,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:25,033 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:25,033 INFO L186 Difference]: Start difference. First operand has 152 places, 152 transitions, 752 flow. Second operand 39 states and 2186 transitions. [2021-12-22 13:46:25,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 270 transitions, 1798 flow [2021-12-22 13:46:25,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 270 transitions, 1645 flow, removed 61 selfloop flow, removed 9 redundant places. [2021-12-22 13:46:25,048 INFO L242 Difference]: Finished difference. Result has 186 places, 205 transitions, 1291 flow [2021-12-22 13:46:25,048 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1291, PETRI_PLACES=186, PETRI_TRANSITIONS=205} [2021-12-22 13:46:25,049 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 107 predicate places. [2021-12-22 13:46:25,050 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 205 transitions, 1291 flow [2021-12-22 13:46:25,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:25,051 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:25,051 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] [2021-12-22 13:46:25,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-22 13:46:25,264 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,SelfDestructingSolverStorable8 [2021-12-22 13:46:25,264 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:25,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:25,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1508892007, now seen corresponding path program 3 times [2021-12-22 13:46:25,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:25,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661299055] [2021-12-22 13:46:25,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:25,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:25,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:25,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661299055] [2021-12-22 13:46:25,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661299055] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:25,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66146107] [2021-12-22 13:46:25,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:46:25,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:25,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:25,495 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:46:25,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:46:25,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 13:46:25,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:46:25,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 13:46:25,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:26,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:46:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:26,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66146107] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:46:26,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:46:26,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-22 13:46:26,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329928302] [2021-12-22 13:46:26,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:46:26,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-22 13:46:26,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:26,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-22 13:46:26,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2021-12-22 13:46:26,583 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-22 13:46:26,584 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 205 transitions, 1291 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:26,584 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:26,584 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-22 13:46:26,584 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:29,986 INFO L129 PetriNetUnfolder]: 280/1042 cut-off events. [2021-12-22 13:46:29,986 INFO L130 PetriNetUnfolder]: For 1438/1440 co-relation queries the response was YES. [2021-12-22 13:46:29,990 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3193 conditions, 1042 events. 280/1042 cut-off events. For 1438/1440 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7246 event pairs, 21 based on Foata normal form. 3/1033 useless extension candidates. Maximal degree in co-relation 3162. Up to 147 conditions per place. [2021-12-22 13:46:29,998 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 158 selfloop transitions, 208 changer transitions 6/414 dead transitions. [2021-12-22 13:46:29,998 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 414 transitions, 3181 flow [2021-12-22 13:46:29,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-22 13:46:29,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-12-22 13:46:30,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4518 transitions. [2021-12-22 13:46:30,024 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6267166042446941 [2021-12-22 13:46:30,024 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4518 transitions. [2021-12-22 13:46:30,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4518 transitions. [2021-12-22 13:46:30,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:30,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4518 transitions. [2021-12-22 13:46:30,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 55.77777777777778) internal successors, (4518), 81 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:30,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:30,049 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:30,049 INFO L186 Difference]: Start difference. First operand has 186 places, 205 transitions, 1291 flow. Second operand 81 states and 4518 transitions. [2021-12-22 13:46:30,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 414 transitions, 3181 flow [2021-12-22 13:46:30,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 414 transitions, 3132 flow, removed 18 selfloop flow, removed 8 redundant places. [2021-12-22 13:46:30,064 INFO L242 Difference]: Finished difference. Result has 271 places, 286 transitions, 2375 flow [2021-12-22 13:46:30,065 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=2375, PETRI_PLACES=271, PETRI_TRANSITIONS=286} [2021-12-22 13:46:30,066 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 192 predicate places. [2021-12-22 13:46:30,066 INFO L470 AbstractCegarLoop]: Abstraction has has 271 places, 286 transitions, 2375 flow [2021-12-22 13:46:30,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:30,067 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:30,067 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] [2021-12-22 13:46:30,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-22 13:46:30,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:30,284 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:30,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:30,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1951911381, now seen corresponding path program 4 times [2021-12-22 13:46:30,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:30,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234976698] [2021-12-22 13:46:30,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:30,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:30,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:30,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:30,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234976698] [2021-12-22 13:46:30,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234976698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:30,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783476900] [2021-12-22 13:46:30,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 13:46:30,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:30,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:30,482 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:46:30,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 13:46:30,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 13:46:30,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:46:30,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 13:46:30,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:31,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:46:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:31,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783476900] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:46:31,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:46:31,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-22 13:46:31,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278561465] [2021-12-22 13:46:31,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:46:31,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-22 13:46:31,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:31,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-22 13:46:31,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2021-12-22 13:46:31,636 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-22 13:46:31,638 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 286 transitions, 2375 flow. Second operand has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:31,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:31,638 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-22 13:46:31,638 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:34,843 INFO L129 PetriNetUnfolder]: 299/1078 cut-off events. [2021-12-22 13:46:34,843 INFO L130 PetriNetUnfolder]: For 4304/4306 co-relation queries the response was YES. [2021-12-22 13:46:34,847 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4343 conditions, 1078 events. 299/1078 cut-off events. For 4304/4306 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7557 event pairs, 19 based on Foata normal form. 3/1070 useless extension candidates. Maximal degree in co-relation 4298. Up to 157 conditions per place. [2021-12-22 13:46:34,853 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 165 selfloop transitions, 232 changer transitions 6/445 dead transitions. [2021-12-22 13:46:34,853 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 445 transitions, 4361 flow [2021-12-22 13:46:34,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-22 13:46:34,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-12-22 13:46:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4528 transitions. [2021-12-22 13:46:34,867 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6281037591899015 [2021-12-22 13:46:34,867 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4528 transitions. [2021-12-22 13:46:34,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4528 transitions. [2021-12-22 13:46:34,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:34,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4528 transitions. [2021-12-22 13:46:34,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 55.901234567901234) internal successors, (4528), 81 states have internal predecessors, (4528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:34,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:34,894 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:34,894 INFO L186 Difference]: Start difference. First operand has 271 places, 286 transitions, 2375 flow. Second operand 81 states and 4528 transitions. [2021-12-22 13:46:34,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 445 transitions, 4361 flow [2021-12-22 13:46:34,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 445 transitions, 4098 flow, removed 74 selfloop flow, removed 19 redundant places. [2021-12-22 13:46:34,919 INFO L242 Difference]: Finished difference. Result has 337 places, 319 transitions, 3031 flow [2021-12-22 13:46:34,919 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=2132, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=3031, PETRI_PLACES=337, PETRI_TRANSITIONS=319} [2021-12-22 13:46:34,919 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 258 predicate places. [2021-12-22 13:46:34,920 INFO L470 AbstractCegarLoop]: Abstraction has has 337 places, 319 transitions, 3031 flow [2021-12-22 13:46:34,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:34,920 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:34,920 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] [2021-12-22 13:46:34,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 13:46:35,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:35,138 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:35,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:35,138 INFO L85 PathProgramCache]: Analyzing trace with hash 692524227, now seen corresponding path program 5 times [2021-12-22 13:46:35,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:35,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304890373] [2021-12-22 13:46:35,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:35,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:35,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:35,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304890373] [2021-12-22 13:46:35,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304890373] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:35,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199644951] [2021-12-22 13:46:35,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 13:46:35,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:35,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:35,348 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:46:35,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 13:46:35,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:46:35,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:46:35,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 13:46:35,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:35,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:46:36,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:36,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199644951] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:46:36,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:46:36,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2021-12-22 13:46:36,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157224387] [2021-12-22 13:46:36,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:46:36,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-22 13:46:36,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:36,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-22 13:46:36,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-12-22 13:46:36,405 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-22 13:46:36,406 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 319 transitions, 3031 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:36,406 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:36,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-22 13:46:36,406 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:37,632 INFO L129 PetriNetUnfolder]: 406/1402 cut-off events. [2021-12-22 13:46:37,632 INFO L130 PetriNetUnfolder]: For 8752/8752 co-relation queries the response was YES. [2021-12-22 13:46:37,639 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6431 conditions, 1402 events. 406/1402 cut-off events. For 8752/8752 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10528 event pairs, 22 based on Foata normal form. 1/1397 useless extension candidates. Maximal degree in co-relation 6377. Up to 392 conditions per place. [2021-12-22 13:46:37,645 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 170 selfloop transitions, 249 changer transitions 6/467 dead transitions. [2021-12-22 13:46:37,646 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 467 transitions, 5413 flow [2021-12-22 13:46:37,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-22 13:46:37,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-22 13:46:37,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2185 transitions. [2021-12-22 13:46:37,648 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6295015845577643 [2021-12-22 13:46:37,648 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2185 transitions. [2021-12-22 13:46:37,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2185 transitions. [2021-12-22 13:46:37,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:37,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2185 transitions. [2021-12-22 13:46:37,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.02564102564103) internal successors, (2185), 39 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:37,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:37,654 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:37,654 INFO L186 Difference]: Start difference. First operand has 337 places, 319 transitions, 3031 flow. Second operand 39 states and 2185 transitions. [2021-12-22 13:46:37,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 467 transitions, 5413 flow [2021-12-22 13:46:37,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 467 transitions, 4816 flow, removed 97 selfloop flow, removed 56 redundant places. [2021-12-22 13:46:37,689 INFO L242 Difference]: Finished difference. Result has 326 places, 396 transitions, 4281 flow [2021-12-22 13:46:37,690 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=2620, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4281, PETRI_PLACES=326, PETRI_TRANSITIONS=396} [2021-12-22 13:46:37,690 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 247 predicate places. [2021-12-22 13:46:37,691 INFO L470 AbstractCegarLoop]: Abstraction has has 326 places, 396 transitions, 4281 flow [2021-12-22 13:46:37,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:37,691 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:37,691 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] [2021-12-22 13:46:37,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 13:46:37,908 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,SelfDestructingSolverStorable11 [2021-12-22 13:46:37,909 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:37,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:37,910 INFO L85 PathProgramCache]: Analyzing trace with hash -229897099, now seen corresponding path program 6 times [2021-12-22 13:46:37,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:37,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76357441] [2021-12-22 13:46:37,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:37,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:37,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:38,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:38,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:38,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76357441] [2021-12-22 13:46:38,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76357441] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:38,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229324889] [2021-12-22 13:46:38,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 13:46:38,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:38,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:38,104 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:46:38,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 13:46:38,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-22 13:46:38,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:46:38,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 13:46:38,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:38,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:46:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:38,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229324889] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:46:38,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:46:38,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-22 13:46:38,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051856909] [2021-12-22 13:46:38,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:46:38,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-22 13:46:38,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:38,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-22 13:46:38,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2021-12-22 13:46:38,981 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-22 13:46:38,982 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 396 transitions, 4281 flow. Second operand has 36 states, 36 states have (on average 53.611111111111114) internal successors, (1930), 36 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:38,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:38,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-22 13:46:38,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:40,113 INFO L129 PetriNetUnfolder]: 406/1417 cut-off events. [2021-12-22 13:46:40,113 INFO L130 PetriNetUnfolder]: For 10316/10316 co-relation queries the response was YES. [2021-12-22 13:46:40,122 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6866 conditions, 1417 events. 406/1417 cut-off events. For 10316/10316 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10763 event pairs, 36 based on Foata normal form. 2/1413 useless extension candidates. Maximal degree in co-relation 6802. Up to 535 conditions per place. [2021-12-22 13:46:40,128 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 151 selfloop transitions, 238 changer transitions 12/443 dead transitions. [2021-12-22 13:46:40,129 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 443 transitions, 5489 flow [2021-12-22 13:46:40,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-22 13:46:40,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-22 13:46:40,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1827 transitions. [2021-12-22 13:46:40,130 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6220633299284984 [2021-12-22 13:46:40,131 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1827 transitions. [2021-12-22 13:46:40,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1827 transitions. [2021-12-22 13:46:40,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:40,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1827 transitions. [2021-12-22 13:46:40,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.36363636363637) internal successors, (1827), 33 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:40,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:40,136 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:40,136 INFO L186 Difference]: Start difference. First operand has 326 places, 396 transitions, 4281 flow. Second operand 33 states and 1827 transitions. [2021-12-22 13:46:40,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 443 transitions, 5489 flow [2021-12-22 13:46:40,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 443 transitions, 5352 flow, removed 43 selfloop flow, removed 12 redundant places. [2021-12-22 13:46:40,189 INFO L242 Difference]: Finished difference. Result has 355 places, 405 transitions, 4946 flow [2021-12-22 13:46:40,189 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=4152, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4946, PETRI_PLACES=355, PETRI_TRANSITIONS=405} [2021-12-22 13:46:40,190 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 276 predicate places. [2021-12-22 13:46:40,190 INFO L470 AbstractCegarLoop]: Abstraction has has 355 places, 405 transitions, 4946 flow [2021-12-22 13:46:40,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.611111111111114) internal successors, (1930), 36 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:40,190 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:40,191 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] [2021-12-22 13:46:40,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-22 13:46:40,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:40,404 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:40,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:40,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1819115727, now seen corresponding path program 7 times [2021-12-22 13:46:40,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:40,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802582947] [2021-12-22 13:46:40,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:40,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:40,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:40,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802582947] [2021-12-22 13:46:40,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802582947] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:40,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118546900] [2021-12-22 13:46:40,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 13:46:40,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:40,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:40,598 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:46:40,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 13:46:40,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:40,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 13:46:40,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:41,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:46:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:41,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118546900] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:46:41,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:46:41,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-22 13:46:41,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456239029] [2021-12-22 13:46:41,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:46:41,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-22 13:46:41,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:41,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-22 13:46:41,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2021-12-22 13:46:41,403 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-22 13:46:41,405 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 405 transitions, 4946 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:41,405 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:41,405 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-22 13:46:41,405 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:44,397 INFO L129 PetriNetUnfolder]: 494/1679 cut-off events. [2021-12-22 13:46:44,398 INFO L130 PetriNetUnfolder]: For 13126/13126 co-relation queries the response was YES. [2021-12-22 13:46:44,408 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8926 conditions, 1679 events. 494/1679 cut-off events. For 13126/13126 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13161 event pairs, 26 based on Foata normal form. 1/1673 useless extension candidates. Maximal degree in co-relation 8853. Up to 414 conditions per place. [2021-12-22 13:46:44,417 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 173 selfloop transitions, 385 changer transitions 6/606 dead transitions. [2021-12-22 13:46:44,417 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 606 transitions, 8475 flow [2021-12-22 13:46:44,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-22 13:46:44,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-12-22 13:46:44,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 3882 transitions. [2021-12-22 13:46:44,420 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6231139646869984 [2021-12-22 13:46:44,420 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 3882 transitions. [2021-12-22 13:46:44,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 3882 transitions. [2021-12-22 13:46:44,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:44,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 3882 transitions. [2021-12-22 13:46:44,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 55.457142857142856) internal successors, (3882), 70 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:44,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 89.0) internal successors, (6319), 71 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:44,434 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 89.0) internal successors, (6319), 71 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:44,434 INFO L186 Difference]: Start difference. First operand has 355 places, 405 transitions, 4946 flow. Second operand 70 states and 3882 transitions. [2021-12-22 13:46:44,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 606 transitions, 8475 flow [2021-12-22 13:46:44,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 606 transitions, 8137 flow, removed 39 selfloop flow, removed 22 redundant places. [2021-12-22 13:46:44,508 INFO L242 Difference]: Finished difference. Result has 410 places, 528 transitions, 7637 flow [2021-12-22 13:46:44,509 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=4718, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=7637, PETRI_PLACES=410, PETRI_TRANSITIONS=528} [2021-12-22 13:46:44,509 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 331 predicate places. [2021-12-22 13:46:44,510 INFO L470 AbstractCegarLoop]: Abstraction has has 410 places, 528 transitions, 7637 flow [2021-12-22 13:46:44,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:44,511 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:44,511 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] [2021-12-22 13:46:44,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 13:46:44,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:44,728 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:44,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:44,728 INFO L85 PathProgramCache]: Analyzing trace with hash -433616245, now seen corresponding path program 8 times [2021-12-22 13:46:44,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:44,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576091555] [2021-12-22 13:46:44,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:44,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:44,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:44,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576091555] [2021-12-22 13:46:44,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576091555] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:44,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757790555] [2021-12-22 13:46:44,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:46:44,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:44,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:44,990 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:46:45,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 13:46:45,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:46:45,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:46:45,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 13:46:45,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:45,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:46:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:46,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757790555] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:46:46,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:46:46,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-22 13:46:46,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583697983] [2021-12-22 13:46:46,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:46:46,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-22 13:46:46,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:46,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-22 13:46:46,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-12-22 13:46:46,091 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-22 13:46:46,093 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 528 transitions, 7637 flow. Second operand has 36 states, 36 states have (on average 53.611111111111114) internal successors, (1930), 36 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:46,093 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:46,093 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-22 13:46:46,093 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:49,923 INFO L129 PetriNetUnfolder]: 590/2044 cut-off events. [2021-12-22 13:46:49,923 INFO L130 PetriNetUnfolder]: For 21449/21449 co-relation queries the response was YES. [2021-12-22 13:46:49,934 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11819 conditions, 2044 events. 590/2044 cut-off events. For 21449/21449 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17350 event pairs, 22 based on Foata normal form. 2/2036 useless extension candidates. Maximal degree in co-relation 11738. Up to 409 conditions per place. [2021-12-22 13:46:49,944 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 190 selfloop transitions, 484 changer transitions 12/728 dead transitions. [2021-12-22 13:46:49,944 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 728 transitions, 11426 flow [2021-12-22 13:46:49,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-22 13:46:49,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-12-22 13:46:49,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 5044 transitions. [2021-12-22 13:46:49,951 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.622792937399679 [2021-12-22 13:46:49,951 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 5044 transitions. [2021-12-22 13:46:49,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 5044 transitions. [2021-12-22 13:46:49,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:49,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 5044 transitions. [2021-12-22 13:46:49,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 55.42857142857143) internal successors, (5044), 91 states have internal predecessors, (5044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:49,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 89.0) internal successors, (8188), 92 states have internal predecessors, (8188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:49,963 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 89.0) internal successors, (8188), 92 states have internal predecessors, (8188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:49,963 INFO L186 Difference]: Start difference. First operand has 410 places, 528 transitions, 7637 flow. Second operand 91 states and 5044 transitions. [2021-12-22 13:46:49,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 728 transitions, 11426 flow [2021-12-22 13:46:50,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 728 transitions, 10858 flow, removed 182 selfloop flow, removed 26 redundant places. [2021-12-22 13:46:50,077 INFO L242 Difference]: Finished difference. Result has 487 places, 626 transitions, 9983 flow [2021-12-22 13:46:50,078 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=7151, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=9983, PETRI_PLACES=487, PETRI_TRANSITIONS=626} [2021-12-22 13:46:50,078 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 408 predicate places. [2021-12-22 13:46:50,078 INFO L470 AbstractCegarLoop]: Abstraction has has 487 places, 626 transitions, 9983 flow [2021-12-22 13:46:50,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.611111111111114) internal successors, (1930), 36 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:50,079 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:50,079 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] [2021-12-22 13:46:50,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 13:46:50,286 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,SelfDestructingSolverStorable14 [2021-12-22 13:46:50,287 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:50,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:50,288 INFO L85 PathProgramCache]: Analyzing trace with hash -466440371, now seen corresponding path program 9 times [2021-12-22 13:46:50,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:50,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997127357] [2021-12-22 13:46:50,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:50,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:50,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:50,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997127357] [2021-12-22 13:46:50,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997127357] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:50,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519701374] [2021-12-22 13:46:50,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:46:50,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:50,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:50,542 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:46:50,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 13:46:50,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 13:46:50,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:46:50,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 13:46:50,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:51,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:51,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:46:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:51,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519701374] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:46:51,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:46:51,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-22 13:46:51,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691296685] [2021-12-22 13:46:51,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:46:51,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-22 13:46:51,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:51,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-22 13:46:51,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-12-22 13:46:51,638 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-22 13:46:51,639 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 626 transitions, 9983 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:51,639 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:51,639 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-22 13:46:51,639 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:53,980 INFO L129 PetriNetUnfolder]: 638/2144 cut-off events. [2021-12-22 13:46:53,980 INFO L130 PetriNetUnfolder]: For 30839/30841 co-relation queries the response was YES. [2021-12-22 13:46:53,995 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13566 conditions, 2144 events. 638/2144 cut-off events. For 30839/30841 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 18076 event pairs, 34 based on Foata normal form. 2/2136 useless extension candidates. Maximal degree in co-relation 13472. Up to 427 conditions per place. [2021-12-22 13:46:54,006 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 254 selfloop transitions, 451 changer transitions 12/759 dead transitions. [2021-12-22 13:46:54,006 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 759 transitions, 12990 flow [2021-12-22 13:46:54,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-22 13:46:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-12-22 13:46:54,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3584 transitions. [2021-12-22 13:46:54,010 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6292134831460674 [2021-12-22 13:46:54,010 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3584 transitions. [2021-12-22 13:46:54,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3584 transitions. [2021-12-22 13:46:54,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:54,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3584 transitions. [2021-12-22 13:46:54,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 56.0) internal successors, (3584), 64 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:54,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 89.0) internal successors, (5785), 65 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:54,019 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 89.0) internal successors, (5785), 65 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:54,019 INFO L186 Difference]: Start difference. First operand has 487 places, 626 transitions, 9983 flow. Second operand 64 states and 3584 transitions. [2021-12-22 13:46:54,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 759 transitions, 12990 flow [2021-12-22 13:46:54,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 759 transitions, 11785 flow, removed 313 selfloop flow, removed 60 redundant places. [2021-12-22 13:46:54,176 INFO L242 Difference]: Finished difference. Result has 491 places, 671 transitions, 10859 flow [2021-12-22 13:46:54,176 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=8973, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=10859, PETRI_PLACES=491, PETRI_TRANSITIONS=671} [2021-12-22 13:46:54,177 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 412 predicate places. [2021-12-22 13:46:54,177 INFO L470 AbstractCegarLoop]: Abstraction has has 491 places, 671 transitions, 10859 flow [2021-12-22 13:46:54,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:54,177 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:54,178 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] [2021-12-22 13:46:54,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 13:46:54,394 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,SelfDestructingSolverStorable15 [2021-12-22 13:46:54,395 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:54,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:54,395 INFO L85 PathProgramCache]: Analyzing trace with hash 315383393, now seen corresponding path program 10 times [2021-12-22 13:46:54,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:54,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020170212] [2021-12-22 13:46:54,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:54,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:54,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:54,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:54,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020170212] [2021-12-22 13:46:54,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020170212] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:54,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583615078] [2021-12-22 13:46:54,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 13:46:54,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:54,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:54,598 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:46:54,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 13:46:54,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 13:46:54,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:46:54,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 13:46:54,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:55,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:46:55,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:55,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583615078] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:46:55,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:46:55,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-22 13:46:55,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156045677] [2021-12-22 13:46:55,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:46:55,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-22 13:46:55,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:55,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-22 13:46:55,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 13:46:55,563 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-22 13:46:55,564 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 671 transitions, 10859 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:55,564 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:55,564 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-22 13:46:55,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:56,579 INFO L129 PetriNetUnfolder]: 636/2124 cut-off events. [2021-12-22 13:46:56,579 INFO L130 PetriNetUnfolder]: For 26755/26760 co-relation queries the response was YES. [2021-12-22 13:46:56,592 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13414 conditions, 2124 events. 636/2124 cut-off events. For 26755/26760 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17820 event pairs, 65 based on Foata normal form. 5/2113 useless extension candidates. Maximal degree in co-relation 13323. Up to 864 conditions per place. [2021-12-22 13:46:56,602 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 304 selfloop transitions, 350 changer transitions 6/702 dead transitions. [2021-12-22 13:46:56,603 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 702 transitions, 12545 flow [2021-12-22 13:46:56,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-22 13:46:56,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-22 13:46:56,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1503 transitions. [2021-12-22 13:46:56,625 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6254681647940075 [2021-12-22 13:46:56,625 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1503 transitions. [2021-12-22 13:46:56,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1503 transitions. [2021-12-22 13:46:56,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:56,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1503 transitions. [2021-12-22 13:46:56,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.666666666666664) internal successors, (1503), 27 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:56,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 89.0) internal successors, (2492), 28 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:56,629 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 89.0) internal successors, (2492), 28 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:56,629 INFO L186 Difference]: Start difference. First operand has 491 places, 671 transitions, 10859 flow. Second operand 27 states and 1503 transitions. [2021-12-22 13:46:56,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 702 transitions, 12545 flow [2021-12-22 13:46:56,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 702 transitions, 12136 flow, removed 92 selfloop flow, removed 43 redundant places. [2021-12-22 13:46:56,780 INFO L242 Difference]: Finished difference. Result has 471 places, 677 transitions, 11585 flow [2021-12-22 13:46:56,781 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=10459, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11585, PETRI_PLACES=471, PETRI_TRANSITIONS=677} [2021-12-22 13:46:56,782 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 392 predicate places. [2021-12-22 13:46:56,782 INFO L470 AbstractCegarLoop]: Abstraction has has 471 places, 677 transitions, 11585 flow [2021-12-22 13:46:56,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:56,782 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:56,782 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] [2021-12-22 13:46:56,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 13:46:56,998 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,SelfDestructingSolverStorable16 [2021-12-22 13:46:56,999 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:56,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:56,999 INFO L85 PathProgramCache]: Analyzing trace with hash -998248241, now seen corresponding path program 11 times [2021-12-22 13:46:56,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:56,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993192009] [2021-12-22 13:46:56,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:56,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:57,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:57,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993192009] [2021-12-22 13:46:57,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993192009] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:57,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751727930] [2021-12-22 13:46:57,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 13:46:57,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:57,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:57,208 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:46:57,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 13:46:57,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:46:57,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:46:57,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 13:46:57,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:57,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:46:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:58,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751727930] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:46:58,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:46:58,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-22 13:46:58,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800994519] [2021-12-22 13:46:58,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:46:58,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-22 13:46:58,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:58,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-22 13:46:58,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 13:46:58,309 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-22 13:46:58,310 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 677 transitions, 11585 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:58,310 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:58,310 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-22 13:46:58,310 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:59,822 INFO L129 PetriNetUnfolder]: 642/2363 cut-off events. [2021-12-22 13:46:59,822 INFO L130 PetriNetUnfolder]: For 32188/32193 co-relation queries the response was YES. [2021-12-22 13:46:59,838 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14630 conditions, 2363 events. 642/2363 cut-off events. For 32188/32193 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21032 event pairs, 57 based on Foata normal form. 5/2362 useless extension candidates. Maximal degree in co-relation 14540. Up to 860 conditions per place. [2021-12-22 13:46:59,850 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 287 selfloop transitions, 387 changer transitions 6/722 dead transitions. [2021-12-22 13:46:59,851 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 722 transitions, 13476 flow [2021-12-22 13:46:59,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-22 13:46:59,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-22 13:46:59,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1783 transitions. [2021-12-22 13:46:59,853 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6260533707865169 [2021-12-22 13:46:59,853 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1783 transitions. [2021-12-22 13:46:59,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1783 transitions. [2021-12-22 13:46:59,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:59,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1783 transitions. [2021-12-22 13:46:59,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.71875) internal successors, (1783), 32 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:59,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:59,858 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:59,858 INFO L186 Difference]: Start difference. First operand has 471 places, 677 transitions, 11585 flow. Second operand 32 states and 1783 transitions. [2021-12-22 13:46:59,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 722 transitions, 13476 flow [2021-12-22 13:47:00,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 722 transitions, 13180 flow, removed 6 selfloop flow, removed 18 redundant places. [2021-12-22 13:47:00,028 INFO L242 Difference]: Finished difference. Result has 489 places, 689 transitions, 12706 flow [2021-12-22 13:47:00,028 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=11297, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=12706, PETRI_PLACES=489, PETRI_TRANSITIONS=689} [2021-12-22 13:47:00,029 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 410 predicate places. [2021-12-22 13:47:00,029 INFO L470 AbstractCegarLoop]: Abstraction has has 489 places, 689 transitions, 12706 flow [2021-12-22 13:47:00,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:00,029 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:47:00,029 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] [2021-12-22 13:47:00,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 13:47:00,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 13:47:00,247 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:47:00,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:47:00,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1655604447, now seen corresponding path program 12 times [2021-12-22 13:47:00,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:47:00,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561405529] [2021-12-22 13:47:00,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:47:00,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:47:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:47:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:47:00,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:47:00,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561405529] [2021-12-22 13:47:00,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561405529] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:47:00,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82133956] [2021-12-22 13:47:00,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 13:47:00,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:47:00,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:47:00,432 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:47:00,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 13:47:00,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-22 13:47:00,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:47:00,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 13:47:00,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:47:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:47:00,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:47:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:47:01,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82133956] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:47:01,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:47:01,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-22 13:47:01,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212625588] [2021-12-22 13:47:01,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:47:01,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-22 13:47:01,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:47:01,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-22 13:47:01,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 13:47:01,424 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-22 13:47:01,425 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 689 transitions, 12706 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:01,425 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:47:01,425 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-22 13:47:01,425 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:47:03,589 INFO L129 PetriNetUnfolder]: 708/2630 cut-off events. [2021-12-22 13:47:03,589 INFO L130 PetriNetUnfolder]: For 41222/41227 co-relation queries the response was YES. [2021-12-22 13:47:03,605 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17207 conditions, 2630 events. 708/2630 cut-off events. For 41222/41227 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 24176 event pairs, 41 based on Foata normal form. 5/2629 useless extension candidates. Maximal degree in co-relation 17112. Up to 693 conditions per place. [2021-12-22 13:47:03,615 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 315 selfloop transitions, 457 changer transitions 6/820 dead transitions. [2021-12-22 13:47:03,616 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 820 transitions, 16270 flow [2021-12-22 13:47:03,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-22 13:47:03,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-12-22 13:47:03,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2573 transitions. [2021-12-22 13:47:03,618 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6284807034684905 [2021-12-22 13:47:03,618 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2573 transitions. [2021-12-22 13:47:03,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2573 transitions. [2021-12-22 13:47:03,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:47:03,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2573 transitions. [2021-12-22 13:47:03,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 55.93478260869565) internal successors, (2573), 46 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:03,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 89.0) internal successors, (4183), 47 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:03,623 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 89.0) internal successors, (4183), 47 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:03,623 INFO L186 Difference]: Start difference. First operand has 489 places, 689 transitions, 12706 flow. Second operand 46 states and 2573 transitions. [2021-12-22 13:47:03,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 820 transitions, 16270 flow [2021-12-22 13:47:03,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 820 transitions, 16139 flow, removed 20 selfloop flow, removed 22 redundant places. [2021-12-22 13:47:03,841 INFO L242 Difference]: Finished difference. Result has 517 places, 742 transitions, 15025 flow [2021-12-22 13:47:03,841 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=12581, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=404, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=15025, PETRI_PLACES=517, PETRI_TRANSITIONS=742} [2021-12-22 13:47:03,842 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 438 predicate places. [2021-12-22 13:47:03,842 INFO L470 AbstractCegarLoop]: Abstraction has has 517 places, 742 transitions, 15025 flow [2021-12-22 13:47:03,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:03,843 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:47:03,843 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] [2021-12-22 13:47:03,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 13:47:04,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:47:04,059 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:47:04,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:47:04,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1198139793, now seen corresponding path program 13 times [2021-12-22 13:47:04,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:47:04,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731233556] [2021-12-22 13:47:04,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:47:04,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:47:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:47:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:47:04,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:47:04,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731233556] [2021-12-22 13:47:04,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731233556] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:47:04,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103597283] [2021-12-22 13:47:04,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 13:47:04,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:47:04,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:47:04,321 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:47:04,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 13:47:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:47:04,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 13:47:04,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:47:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:47:04,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:47:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:47:05,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103597283] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:47:05,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:47:05,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-22 13:47:05,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770733691] [2021-12-22 13:47:05,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:47:05,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-22 13:47:05,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:47:05,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-22 13:47:05,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 13:47:05,421 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-22 13:47:05,422 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 742 transitions, 15025 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:05,422 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:47:05,422 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-22 13:47:05,422 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:47:09,172 INFO L129 PetriNetUnfolder]: 796/2952 cut-off events. [2021-12-22 13:47:09,172 INFO L130 PetriNetUnfolder]: For 56034/56059 co-relation queries the response was YES. [2021-12-22 13:47:09,194 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20425 conditions, 2952 events. 796/2952 cut-off events. For 56034/56059 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 27940 event pairs, 39 based on Foata normal form. 8/2954 useless extension candidates. Maximal degree in co-relation 20325. Up to 699 conditions per place. [2021-12-22 13:47:09,205 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 263 selfloop transitions, 615 changer transitions 6/926 dead transitions. [2021-12-22 13:47:09,206 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 926 transitions, 19721 flow [2021-12-22 13:47:09,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-22 13:47:09,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-12-22 13:47:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 3995 transitions. [2021-12-22 13:47:09,222 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6234394506866417 [2021-12-22 13:47:09,222 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 3995 transitions. [2021-12-22 13:47:09,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 3995 transitions. [2021-12-22 13:47:09,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:47:09,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 3995 transitions. [2021-12-22 13:47:09,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 55.486111111111114) internal successors, (3995), 72 states have internal predecessors, (3995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:09,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 89.0) internal successors, (6497), 73 states have internal predecessors, (6497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:09,230 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 89.0) internal successors, (6497), 73 states have internal predecessors, (6497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:09,230 INFO L186 Difference]: Start difference. First operand has 517 places, 742 transitions, 15025 flow. Second operand 72 states and 3995 transitions. [2021-12-22 13:47:09,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 926 transitions, 19721 flow [2021-12-22 13:47:09,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 926 transitions, 19300 flow, removed 49 selfloop flow, removed 25 redundant places. [2021-12-22 13:47:09,484 INFO L242 Difference]: Finished difference. Result has 572 places, 840 transitions, 18614 flow [2021-12-22 13:47:09,485 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=14664, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=18614, PETRI_PLACES=572, PETRI_TRANSITIONS=840} [2021-12-22 13:47:09,485 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 493 predicate places. [2021-12-22 13:47:09,485 INFO L470 AbstractCegarLoop]: Abstraction has has 572 places, 840 transitions, 18614 flow [2021-12-22 13:47:09,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:09,486 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:47:09,486 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] [2021-12-22 13:47:09,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 13:47:09,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-12-22 13:47:09,703 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:47:09,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:47:09,703 INFO L85 PathProgramCache]: Analyzing trace with hash -54177703, now seen corresponding path program 14 times [2021-12-22 13:47:09,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:47:09,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830208589] [2021-12-22 13:47:09,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:47:09,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:47:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:47:09,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:47:09,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:47:09,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830208589] [2021-12-22 13:47:09,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830208589] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:47:09,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739253758] [2021-12-22 13:47:09,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:47:09,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:47:09,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:47:09,889 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:47:09,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 13:47:09,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:47:09,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:47:09,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 13:47:09,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:47:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:47:10,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:47:10,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:47:10,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739253758] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:47:10,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:47:10,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-22 13:47:10,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992940278] [2021-12-22 13:47:10,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:47:10,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-22 13:47:10,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:47:10,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-22 13:47:10,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 13:47:10,885 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-22 13:47:10,886 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 840 transitions, 18614 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:10,886 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:47:10,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-22 13:47:10,886 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:47:12,550 INFO L129 PetriNetUnfolder]: 796/2931 cut-off events. [2021-12-22 13:47:12,550 INFO L130 PetriNetUnfolder]: For 63100/63116 co-relation queries the response was YES. [2021-12-22 13:47:12,571 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21820 conditions, 2931 events. 796/2931 cut-off events. For 63100/63116 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27601 event pairs, 100 based on Foata normal form. 3/2908 useless extension candidates. Maximal degree in co-relation 21712. Up to 1045 conditions per place. [2021-12-22 13:47:12,583 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 361 selfloop transitions, 464 changer transitions 6/873 dead transitions. [2021-12-22 13:47:12,583 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 598 places, 873 transitions, 20686 flow [2021-12-22 13:47:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-22 13:47:12,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-22 13:47:12,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1666 transitions. [2021-12-22 13:47:12,585 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6239700374531835 [2021-12-22 13:47:12,585 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1666 transitions. [2021-12-22 13:47:12,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1666 transitions. [2021-12-22 13:47:12,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:47:12,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1666 transitions. [2021-12-22 13:47:12,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.53333333333333) internal successors, (1666), 30 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:12,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 89.0) internal successors, (2759), 31 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:12,589 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 89.0) internal successors, (2759), 31 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:12,589 INFO L186 Difference]: Start difference. First operand has 572 places, 840 transitions, 18614 flow. Second operand 30 states and 1666 transitions. [2021-12-22 13:47:12,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 598 places, 873 transitions, 20686 flow [2021-12-22 13:47:12,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 873 transitions, 19949 flow, removed 80 selfloop flow, removed 40 redundant places. [2021-12-22 13:47:12,900 INFO L242 Difference]: Finished difference. Result has 565 places, 849 transitions, 19336 flow [2021-12-22 13:47:12,901 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=17892, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=19336, PETRI_PLACES=565, PETRI_TRANSITIONS=849} [2021-12-22 13:47:12,901 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 486 predicate places. [2021-12-22 13:47:12,901 INFO L470 AbstractCegarLoop]: Abstraction has has 565 places, 849 transitions, 19336 flow [2021-12-22 13:47:12,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:12,902 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:47:12,902 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] [2021-12-22 13:47:12,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-22 13:47:13,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:47:13,116 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:47:13,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:47:13,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2075614249, now seen corresponding path program 15 times [2021-12-22 13:47:13,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:47:13,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318027540] [2021-12-22 13:47:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:47:13,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:47:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:47:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:47:13,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:47:13,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318027540] [2021-12-22 13:47:13,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318027540] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:47:13,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719610947] [2021-12-22 13:47:13,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:47:13,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:47:13,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:47:13,340 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:47:13,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-22 13:47:13,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 13:47:13,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:47:13,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 13:47:13,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:47:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:47:13,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:47:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:47:14,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719610947] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:47:14,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:47:14,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-22 13:47:14,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348542468] [2021-12-22 13:47:14,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:47:14,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-22 13:47:14,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:47:14,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-22 13:47:14,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 13:47:14,259 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-22 13:47:14,260 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 849 transitions, 19336 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:14,260 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:47:14,260 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-22 13:47:14,260 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:47:18,945 INFO L129 PetriNetUnfolder]: 915/3385 cut-off events. [2021-12-22 13:47:18,945 INFO L130 PetriNetUnfolder]: For 80574/80583 co-relation queries the response was YES. [2021-12-22 13:47:18,978 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25522 conditions, 3385 events. 915/3385 cut-off events. For 80574/80583 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33109 event pairs, 52 based on Foata normal form. 4/3375 useless extension candidates. Maximal degree in co-relation 25411. Up to 893 conditions per place. [2021-12-22 13:47:18,993 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 285 selfloop transitions, 763 changer transitions 6/1096 dead transitions. [2021-12-22 13:47:18,993 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 1096 transitions, 26202 flow [2021-12-22 13:47:18,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-12-22 13:47:18,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-12-22 13:47:18,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 5464 transitions. [2021-12-22 13:47:18,997 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.62013392350471 [2021-12-22 13:47:18,997 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 5464 transitions. [2021-12-22 13:47:18,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 5464 transitions. [2021-12-22 13:47:18,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:47:18,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 5464 transitions. [2021-12-22 13:47:19,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 55.19191919191919) internal successors, (5464), 99 states have internal predecessors, (5464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:19,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 89.0) internal successors, (8900), 100 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:19,009 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 89.0) internal successors, (8900), 100 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:19,009 INFO L186 Difference]: Start difference. First operand has 565 places, 849 transitions, 19336 flow. Second operand 99 states and 5464 transitions. [2021-12-22 13:47:19,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 660 places, 1096 transitions, 26202 flow [2021-12-22 13:47:19,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 642 places, 1096 transitions, 25760 flow, removed 12 selfloop flow, removed 18 redundant places. [2021-12-22 13:47:19,490 INFO L242 Difference]: Finished difference. Result has 659 places, 1014 transitions, 24999 flow [2021-12-22 13:47:19,491 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=18955, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=612, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=24999, PETRI_PLACES=659, PETRI_TRANSITIONS=1014} [2021-12-22 13:47:19,491 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 580 predicate places. [2021-12-22 13:47:19,492 INFO L470 AbstractCegarLoop]: Abstraction has has 659 places, 1014 transitions, 24999 flow [2021-12-22 13:47:19,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:19,492 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:47:19,492 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] [2021-12-22 13:47:19,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-22 13:47:19,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:47:19,708 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:47:19,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:47:19,708 INFO L85 PathProgramCache]: Analyzing trace with hash 796033221, now seen corresponding path program 16 times [2021-12-22 13:47:19,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:47:19,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850100756] [2021-12-22 13:47:19,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:47:19,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:47:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:47:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:47:19,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:47:19,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850100756] [2021-12-22 13:47:19,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850100756] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:47:19,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626857306] [2021-12-22 13:47:19,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 13:47:19,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:47:19,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:47:19,996 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:47:19,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-22 13:47:20,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 13:47:20,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:47:20,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 13:47:20,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:47:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:47:20,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:47:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:47:21,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626857306] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:47:21,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:47:21,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-22 13:47:21,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658432748] [2021-12-22 13:47:21,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:47:21,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-22 13:47:21,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:47:21,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-22 13:47:21,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 13:47:21,189 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-22 13:47:21,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 659 places, 1014 transitions, 24999 flow. Second operand has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:21,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:47:21,191 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-22 13:47:21,191 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand