./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 997cd7c3 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/triangular-longer-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ff437623f349039c7c835e26d53647ec95811c37 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Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-997cd7c-m [2021-09-22 14:25:02,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-09-22 14:25:02,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-09-22 14:25:02,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-09-22 14:25:02,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-09-22 14:25:02,468 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-09-22 14:25:02,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-09-22 14:25:02,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-09-22 14:25:02,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-09-22 14:25:02,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-09-22 14:25:02,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-09-22 14:25:02,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-09-22 14:25:02,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-09-22 14:25:02,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-09-22 14:25:02,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-09-22 14:25:02,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-09-22 14:25:02,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-09-22 14:25:02,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-09-22 14:25:02,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-09-22 14:25:02,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-09-22 14:25:02,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-09-22 14:25:02,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-09-22 14:25:02,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-09-22 14:25:02,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-09-22 14:25:02,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-09-22 14:25:02,485 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-09-22 14:25:02,485 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-09-22 14:25:02,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-09-22 14:25:02,486 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-09-22 14:25:02,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-09-22 14:25:02,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-09-22 14:25:02,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-09-22 14:25:02,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-09-22 14:25:02,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-09-22 14:25:02,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-09-22 14:25:02,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-09-22 14:25:02,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-09-22 14:25:02,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-09-22 14:25:02,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-09-22 14:25:02,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-09-22 14:25:02,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-09-22 14:25:02,493 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-09-22 14:25:02,507 INFO L113 SettingsManager]: Loading preferences was successful [2021-09-22 14:25:02,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-09-22 14:25:02,508 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-09-22 14:25:02,508 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-09-22 14:25:02,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-09-22 14:25:02,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-09-22 14:25:02,509 INFO L138 SettingsManager]: * Use SBE=true [2021-09-22 14:25:02,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-09-22 14:25:02,510 INFO L138 SettingsManager]: * sizeof long=4 [2021-09-22 14:25:02,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-09-22 14:25:02,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-09-22 14:25:02,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-09-22 14:25:02,510 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-09-22 14:25:02,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-09-22 14:25:02,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-09-22 14:25:02,511 INFO L138 SettingsManager]: * sizeof long double=12 [2021-09-22 14:25:02,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-09-22 14:25:02,511 INFO L138 SettingsManager]: * Use constant arrays=true [2021-09-22 14:25:02,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-09-22 14:25:02,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-09-22 14:25:02,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-09-22 14:25:02,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-09-22 14:25:02,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-09-22 14:25:02,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-09-22 14:25:02,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-09-22 14:25:02,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-09-22 14:25:02,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-09-22 14:25:02,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-09-22 14:25:02,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-09-22 14:25:02,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-09-22 14:25:02,520 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff437623f349039c7c835e26d53647ec95811c37 [2021-09-22 14:25:02,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-09-22 14:25:02,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-09-22 14:25:02,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-09-22 14:25:02,892 INFO L271 PluginConnector]: Initializing CDTParser... [2021-09-22 14:25:02,892 INFO L275 PluginConnector]: CDTParser initialized [2021-09-22 14:25:02,893 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-longer-2.i [2021-09-22 14:25:02,945 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/949195f0d/d342a51d09e94095ae24edc177c96d73/FLAG37572f524 [2021-09-22 14:25:03,406 INFO L306 CDTParser]: Found 1 translation units. [2021-09-22 14:25:03,406 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-2.i [2021-09-22 14:25:03,418 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/949195f0d/d342a51d09e94095ae24edc177c96d73/FLAG37572f524 [2021-09-22 14:25:03,716 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/949195f0d/d342a51d09e94095ae24edc177c96d73 [2021-09-22 14:25:03,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-09-22 14:25:03,723 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-09-22 14:25:03,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-09-22 14:25:03,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-09-22 14:25:03,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-09-22 14:25:03,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.09 02:25:03" (1/1) ... [2021-09-22 14:25:03,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28825d20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:03, skipping insertion in model container [2021-09-22 14:25:03,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.09 02:25:03" (1/1) ... [2021-09-22 14:25:03,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-09-22 14:25:03,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-09-22 14:25:03,964 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-2.i[30963,30976] [2021-09-22 14:25:04,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-09-22 14:25:04,005 INFO L203 MainTranslator]: Completed pre-run [2021-09-22 14:25:04,028 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-2.i[30963,30976] [2021-09-22 14:25:04,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-09-22 14:25:04,052 INFO L208 MainTranslator]: Completed translation [2021-09-22 14:25:04,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:04 WrapperNode [2021-09-22 14:25:04,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-09-22 14:25:04,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-09-22 14:25:04,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-09-22 14:25:04,053 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-09-22 14:25:04,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:04" (1/1) ... [2021-09-22 14:25:04,066 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:04" (1/1) ... [2021-09-22 14:25:04,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-09-22 14:25:04,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-09-22 14:25:04,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-09-22 14:25:04,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-09-22 14:25:04,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:04" (1/1) ... [2021-09-22 14:25:04,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:04" (1/1) ... [2021-09-22 14:25:04,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:04" (1/1) ... [2021-09-22 14:25:04,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:04" (1/1) ... [2021-09-22 14:25:04,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:04" (1/1) ... [2021-09-22 14:25:04,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:04" (1/1) ... [2021-09-22 14:25:04,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:04" (1/1) ... [2021-09-22 14:25:04,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-09-22 14:25:04,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-09-22 14:25:04,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-09-22 14:25:04,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-09-22 14:25:04,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:04" (1/1) ... [2021-09-22 14:25:04,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-09-22 14:25:04,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:04,126 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) [2021-09-22 14:25:04,147 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 [2021-09-22 14:25:04,156 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-09-22 14:25:04,156 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-09-22 14:25:04,157 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-09-22 14:25:04,157 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-09-22 14:25:04,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-09-22 14:25:04,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-09-22 14:25:04,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-09-22 14:25:04,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-09-22 14:25:04,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-09-22 14:25:04,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-09-22 14:25:04,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-09-22 14:25:04,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-09-22 14:25:04,159 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-09-22 14:25:04,421 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-09-22 14:25:04,424 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-09-22 14:25:04,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.09 02:25:04 BoogieIcfgContainer [2021-09-22 14:25:04,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-09-22 14:25:04,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-09-22 14:25:04,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-09-22 14:25:04,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-09-22 14:25:04,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.09 02:25:03" (1/3) ... [2021-09-22 14:25:04,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c2b8e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.09 02:25:04, skipping insertion in model container [2021-09-22 14:25:04,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:04" (2/3) ... [2021-09-22 14:25:04,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c2b8e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.09 02:25:04, skipping insertion in model container [2021-09-22 14:25:04,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.09 02:25:04" (3/3) ... [2021-09-22 14:25:04,431 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2021-09-22 14:25:04,434 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-09-22 14:25:04,434 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-09-22 14:25:04,434 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-09-22 14:25:04,435 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-09-22 14:25:04,459 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,459 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,459 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,459 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,459 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,459 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,460 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,460 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,460 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,460 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,461 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,461 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,461 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,462 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,462 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,462 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,462 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,462 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,462 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,463 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,463 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,463 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,464 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,464 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,464 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,464 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,464 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,464 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,465 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,465 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,465 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,466 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,466 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,466 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,467 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,467 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,467 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,467 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,467 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,467 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,468 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,468 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,468 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,468 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,468 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,468 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,469 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,469 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,469 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,469 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,469 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,469 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,470 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,470 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,471 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,471 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,475 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,476 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,476 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,476 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,476 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,477 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,484 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,484 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,484 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,484 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,484 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,484 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:04,488 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-09-22 14:25:04,521 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-09-22 14:25:04,526 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-09-22 14:25:04,526 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-09-22 14:25:04,541 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-09-22 14:25:04,550 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 66 transitions, 142 flow [2021-09-22 14:25:04,552 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 66 transitions, 142 flow [2021-09-22 14:25:04,553 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2021-09-22 14:25:04,601 INFO L129 PetriNetUnfolder]: 5/64 cut-off events. [2021-09-22 14:25:04,602 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-09-22 14:25:04,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2021-09-22 14:25:04,608 INFO L116 LiptonReduction]: Number of co-enabled transitions 1078 [2021-09-22 14:25:06,632 INFO L131 LiptonReduction]: Checked pairs total: 1010 [2021-09-22 14:25:06,632 INFO L133 LiptonReduction]: Total number of compositions: 58 [2021-09-22 14:25:06,638 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2021-09-22 14:25:06,645 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:06,646 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:06,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-09-22 14:25:06,649 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:06,649 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-09-22 14:25:06,650 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:06,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:06,653 INFO L82 PathProgramCache]: Analyzing trace with hash -776411381, now seen corresponding path program 1 times [2021-09-22 14:25:06,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:06,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969649272] [2021-09-22 14:25:06,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:06,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:06,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:06,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969649272] [2021-09-22 14:25:06,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969649272] provided 1 perfect and 0 imperfect interpolant sequences [2021-09-22 14:25:06,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-09-22 14:25:06,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-09-22 14:25:06,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773962671] [2021-09-22 14:25:06,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-09-22 14:25:06,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:06,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-09-22 14:25:06,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-09-22 14:25:06,848 INFO L87 Difference]: Start difference. First operand has 35 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:06,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:06,880 INFO L93 Difference]: Finished difference Result 44 states and 107 transitions. [2021-09-22 14:25:06,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-09-22 14:25:06,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-09-22 14:25:06,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:06,890 INFO L225 Difference]: With dead ends: 44 [2021-09-22 14:25:06,890 INFO L226 Difference]: Without dead ends: 38 [2021-09-22 14:25:06,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-09-22 14:25:06,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-09-22 14:25:06,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-09-22 14:25:06,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:06,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2021-09-22 14:25:06,915 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 6 [2021-09-22 14:25:06,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:06,915 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2021-09-22 14:25:06,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:06,915 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2021-09-22 14:25:06,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-09-22 14:25:06,916 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:06,916 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:06,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-09-22 14:25:06,916 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:06,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:06,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1192430633, now seen corresponding path program 1 times [2021-09-22 14:25:06,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:06,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843781025] [2021-09-22 14:25:06,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:06,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:07,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:07,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843781025] [2021-09-22 14:25:07,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843781025] provided 1 perfect and 0 imperfect interpolant sequences [2021-09-22 14:25:07,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-09-22 14:25:07,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-09-22 14:25:07,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607308082] [2021-09-22 14:25:07,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-09-22 14:25:07,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:07,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-09-22 14:25:07,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-09-22 14:25:07,032 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:07,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:07,070 INFO L93 Difference]: Finished difference Result 64 states and 150 transitions. [2021-09-22 14:25:07,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-09-22 14:25:07,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-09-22 14:25:07,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:07,071 INFO L225 Difference]: With dead ends: 64 [2021-09-22 14:25:07,072 INFO L226 Difference]: Without dead ends: 50 [2021-09-22 14:25:07,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-09-22 14:25:07,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-09-22 14:25:07,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-09-22 14:25:07,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2021-09-22 14:25:07,076 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2021-09-22 14:25:07,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:07,077 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2021-09-22 14:25:07,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:07,077 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2021-09-22 14:25:07,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-09-22 14:25:07,077 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:07,077 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:07,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-09-22 14:25:07,078 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:07,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:07,078 INFO L82 PathProgramCache]: Analyzing trace with hash -830913789, now seen corresponding path program 1 times [2021-09-22 14:25:07,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:07,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275274280] [2021-09-22 14:25:07,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:07,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:07,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:07,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275274280] [2021-09-22 14:25:07,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275274280] provided 1 perfect and 0 imperfect interpolant sequences [2021-09-22 14:25:07,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-09-22 14:25:07,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-09-22 14:25:07,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556771653] [2021-09-22 14:25:07,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-09-22 14:25:07,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:07,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-09-22 14:25:07,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-09-22 14:25:07,129 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:07,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:07,205 INFO L93 Difference]: Finished difference Result 58 states and 136 transitions. [2021-09-22 14:25:07,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-09-22 14:25:07,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-09-22 14:25:07,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:07,206 INFO L225 Difference]: With dead ends: 58 [2021-09-22 14:25:07,207 INFO L226 Difference]: Without dead ends: 52 [2021-09-22 14:25:07,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-09-22 14:25:07,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-09-22 14:25:07,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2021-09-22 14:25:07,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.4324324324324325) internal successors, (90), 37 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:07,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 90 transitions. [2021-09-22 14:25:07,210 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 90 transitions. Word has length 10 [2021-09-22 14:25:07,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:07,211 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 90 transitions. [2021-09-22 14:25:07,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:07,211 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 90 transitions. [2021-09-22 14:25:07,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-09-22 14:25:07,211 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:07,211 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:07,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-09-22 14:25:07,212 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:07,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:07,212 INFO L82 PathProgramCache]: Analyzing trace with hash -855995889, now seen corresponding path program 2 times [2021-09-22 14:25:07,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:07,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246104173] [2021-09-22 14:25:07,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:07,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:07,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:07,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246104173] [2021-09-22 14:25:07,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246104173] provided 1 perfect and 0 imperfect interpolant sequences [2021-09-22 14:25:07,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-09-22 14:25:07,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-09-22 14:25:07,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855245691] [2021-09-22 14:25:07,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-09-22 14:25:07,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:07,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-09-22 14:25:07,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-09-22 14:25:07,260 INFO L87 Difference]: Start difference. First operand 38 states and 90 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:07,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:07,320 INFO L93 Difference]: Finished difference Result 62 states and 150 transitions. [2021-09-22 14:25:07,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-09-22 14:25:07,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-09-22 14:25:07,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:07,321 INFO L225 Difference]: With dead ends: 62 [2021-09-22 14:25:07,321 INFO L226 Difference]: Without dead ends: 46 [2021-09-22 14:25:07,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-09-22 14:25:07,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-09-22 14:25:07,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2021-09-22 14:25:07,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.484848484848485) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:07,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2021-09-22 14:25:07,324 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 10 [2021-09-22 14:25:07,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:07,324 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2021-09-22 14:25:07,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:07,324 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2021-09-22 14:25:07,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-09-22 14:25:07,325 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:07,325 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:07,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-09-22 14:25:07,325 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:07,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:07,326 INFO L82 PathProgramCache]: Analyzing trace with hash 11487317, now seen corresponding path program 3 times [2021-09-22 14:25:07,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:07,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277375349] [2021-09-22 14:25:07,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:07,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:07,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:07,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277375349] [2021-09-22 14:25:07,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277375349] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:07,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751053241] [2021-09-22 14:25:07,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-09-22 14:25:07,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:07,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:07,383 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) [2021-09-22 14:25:07,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-09-22 14:25:07,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-09-22 14:25:07,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:07,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-09-22 14:25:07,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:07,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751053241] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:07,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:07,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-09-22 14:25:07,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833932085] [2021-09-22 14:25:07,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-09-22 14:25:07,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:07,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-09-22 14:25:07,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-09-22 14:25:07,499 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:07,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:07,635 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2021-09-22 14:25:07,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-09-22 14:25:07,636 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-09-22 14:25:07,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:07,636 INFO L225 Difference]: With dead ends: 72 [2021-09-22 14:25:07,636 INFO L226 Difference]: Without dead ends: 58 [2021-09-22 14:25:07,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-09-22 14:25:07,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-09-22 14:25:07,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2021-09-22 14:25:07,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.522727272727273) internal successors, (111), 44 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:07,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 111 transitions. [2021-09-22 14:25:07,640 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 111 transitions. Word has length 11 [2021-09-22 14:25:07,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:07,640 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 111 transitions. [2021-09-22 14:25:07,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:07,641 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 111 transitions. [2021-09-22 14:25:07,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-09-22 14:25:07,641 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:07,641 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:07,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:07,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:07,858 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:07,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:07,858 INFO L82 PathProgramCache]: Analyzing trace with hash 2021963921, now seen corresponding path program 4 times [2021-09-22 14:25:07,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:07,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66664131] [2021-09-22 14:25:07,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:07,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:07,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:07,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66664131] [2021-09-22 14:25:07,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66664131] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:07,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548948542] [2021-09-22 14:25:07,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-09-22 14:25:07,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:07,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:07,920 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) [2021-09-22 14:25:07,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-09-22 14:25:07,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-09-22 14:25:07,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:07,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-09-22 14:25:07,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:08,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548948542] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:08,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:08,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-09-22 14:25:08,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962476015] [2021-09-22 14:25:08,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-09-22 14:25:08,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:08,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-09-22 14:25:08,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-09-22 14:25:08,012 INFO L87 Difference]: Start difference. First operand 45 states and 111 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:08,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:08,161 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2021-09-22 14:25:08,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-09-22 14:25:08,161 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-09-22 14:25:08,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:08,162 INFO L225 Difference]: With dead ends: 68 [2021-09-22 14:25:08,162 INFO L226 Difference]: Without dead ends: 54 [2021-09-22 14:25:08,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 122.4ms TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-09-22 14:25:08,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-09-22 14:25:08,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2021-09-22 14:25:08,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:08,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2021-09-22 14:25:08,165 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 12 [2021-09-22 14:25:08,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:08,165 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2021-09-22 14:25:08,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:08,165 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2021-09-22 14:25:08,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-09-22 14:25:08,166 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:08,166 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:08,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:08,382 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,SelfDestructingSolverStorable5 [2021-09-22 14:25:08,382 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:08,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:08,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1845297833, now seen corresponding path program 5 times [2021-09-22 14:25:08,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:08,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951984043] [2021-09-22 14:25:08,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:08,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:08,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:08,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951984043] [2021-09-22 14:25:08,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951984043] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:08,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963465494] [2021-09-22 14:25:08,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-09-22 14:25:08,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:08,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:08,454 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) [2021-09-22 14:25:08,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-09-22 14:25:08,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-09-22 14:25:08,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:08,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-09-22 14:25:08,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:08,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963465494] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:08,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:08,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-09-22 14:25:08,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962267323] [2021-09-22 14:25:08,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-09-22 14:25:08,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:08,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-09-22 14:25:08,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-09-22 14:25:08,555 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:08,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:08,723 INFO L93 Difference]: Finished difference Result 70 states and 171 transitions. [2021-09-22 14:25:08,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-09-22 14:25:08,724 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-09-22 14:25:08,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:08,724 INFO L225 Difference]: With dead ends: 70 [2021-09-22 14:25:08,724 INFO L226 Difference]: Without dead ends: 58 [2021-09-22 14:25:08,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 143.3ms TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2021-09-22 14:25:08,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-09-22 14:25:08,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2021-09-22 14:25:08,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:08,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2021-09-22 14:25:08,727 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 13 [2021-09-22 14:25:08,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:08,728 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2021-09-22 14:25:08,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:08,728 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2021-09-22 14:25:08,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-09-22 14:25:08,728 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:08,728 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:08,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:08,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:08,937 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:08,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:08,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1782402707, now seen corresponding path program 6 times [2021-09-22 14:25:08,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:08,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674475311] [2021-09-22 14:25:08,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:08,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:09,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:09,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674475311] [2021-09-22 14:25:09,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674475311] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:09,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854637961] [2021-09-22 14:25:09,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-09-22 14:25:09,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:09,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:09,028 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) [2021-09-22 14:25:09,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-09-22 14:25:09,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-09-22 14:25:09,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:09,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-09-22 14:25:09,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:09,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854637961] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:09,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:09,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-09-22 14:25:09,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307774365] [2021-09-22 14:25:09,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-09-22 14:25:09,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:09,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-09-22 14:25:09,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-09-22 14:25:09,181 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:09,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:09,402 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2021-09-22 14:25:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-09-22 14:25:09,402 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-09-22 14:25:09,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:09,403 INFO L225 Difference]: With dead ends: 90 [2021-09-22 14:25:09,403 INFO L226 Difference]: Without dead ends: 76 [2021-09-22 14:25:09,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2021-09-22 14:25:09,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-09-22 14:25:09,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-09-22 14:25:09,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.547169811320755) internal successors, (135), 53 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:09,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 135 transitions. [2021-09-22 14:25:09,406 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 135 transitions. Word has length 14 [2021-09-22 14:25:09,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:09,406 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 135 transitions. [2021-09-22 14:25:09,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:09,406 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 135 transitions. [2021-09-22 14:25:09,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-09-22 14:25:09,407 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:09,407 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:09,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:09,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:09,617 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:09,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:09,617 INFO L82 PathProgramCache]: Analyzing trace with hash 490568153, now seen corresponding path program 7 times [2021-09-22 14:25:09,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:09,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322070106] [2021-09-22 14:25:09,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:09,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:09,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:09,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322070106] [2021-09-22 14:25:09,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322070106] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:09,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206660315] [2021-09-22 14:25:09,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-09-22 14:25:09,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:09,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:09,686 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) [2021-09-22 14:25:09,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-09-22 14:25:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:09,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 13 conjunts are in the unsatisfiable core [2021-09-22 14:25:09,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:09,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206660315] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:09,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:09,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-09-22 14:25:09,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944175564] [2021-09-22 14:25:09,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-09-22 14:25:09,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:09,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-09-22 14:25:09,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-09-22 14:25:09,808 INFO L87 Difference]: Start difference. First operand 54 states and 135 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:10,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:10,058 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2021-09-22 14:25:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-09-22 14:25:10,058 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-09-22 14:25:10,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:10,059 INFO L225 Difference]: With dead ends: 92 [2021-09-22 14:25:10,059 INFO L226 Difference]: Without dead ends: 78 [2021-09-22 14:25:10,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 229.1ms TimeCoverageRelationStatistics Valid=263, Invalid=607, Unknown=0, NotChecked=0, Total=870 [2021-09-22 14:25:10,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-09-22 14:25:10,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 48. [2021-09-22 14:25:10,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.4468085106382977) internal successors, (115), 47 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:10,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 115 transitions. [2021-09-22 14:25:10,062 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 115 transitions. Word has length 15 [2021-09-22 14:25:10,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:10,062 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 115 transitions. [2021-09-22 14:25:10,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:10,062 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 115 transitions. [2021-09-22 14:25:10,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-09-22 14:25:10,062 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:10,062 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:10,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:10,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:10,269 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:10,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:10,269 INFO L82 PathProgramCache]: Analyzing trace with hash -802659181, now seen corresponding path program 8 times [2021-09-22 14:25:10,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:10,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948596465] [2021-09-22 14:25:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:10,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-09-22 14:25:10,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:10,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948596465] [2021-09-22 14:25:10,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948596465] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:10,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623468215] [2021-09-22 14:25:10,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-09-22 14:25:10,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:10,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:10,337 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) [2021-09-22 14:25:10,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-09-22 14:25:10,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-09-22 14:25:10,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:10,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjunts are in the unsatisfiable core [2021-09-22 14:25:10,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-09-22 14:25:10,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623468215] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:10,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:10,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-09-22 14:25:10,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560874849] [2021-09-22 14:25:10,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-09-22 14:25:10,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:10,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-09-22 14:25:10,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-09-22 14:25:10,485 INFO L87 Difference]: Start difference. First operand 48 states and 115 transitions. Second operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:10,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:10,692 INFO L93 Difference]: Finished difference Result 95 states and 228 transitions. [2021-09-22 14:25:10,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-09-22 14:25:10,692 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-09-22 14:25:10,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:10,693 INFO L225 Difference]: With dead ends: 95 [2021-09-22 14:25:10,693 INFO L226 Difference]: Without dead ends: 84 [2021-09-22 14:25:10,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-09-22 14:25:10,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-09-22 14:25:10,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2021-09-22 14:25:10,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.462686567164179) internal successors, (165), 67 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:10,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 165 transitions. [2021-09-22 14:25:10,696 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 165 transitions. Word has length 16 [2021-09-22 14:25:10,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:10,696 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 165 transitions. [2021-09-22 14:25:10,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:10,696 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 165 transitions. [2021-09-22 14:25:10,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-09-22 14:25:10,697 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:10,697 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:10,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:10,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:10,905 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:10,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:10,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1010117031, now seen corresponding path program 9 times [2021-09-22 14:25:10,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:10,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254774667] [2021-09-22 14:25:10,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:10,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-09-22 14:25:10,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:10,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254774667] [2021-09-22 14:25:10,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254774667] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:10,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319398486] [2021-09-22 14:25:10,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-09-22 14:25:10,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:10,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:10,979 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) [2021-09-22 14:25:11,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-09-22 14:25:11,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-09-22 14:25:11,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:11,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-09-22 14:25:11,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-09-22 14:25:11,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319398486] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:11,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:11,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-09-22 14:25:11,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118688237] [2021-09-22 14:25:11,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-09-22 14:25:11,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:11,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-09-22 14:25:11,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-09-22 14:25:11,156 INFO L87 Difference]: Start difference. First operand 68 states and 165 transitions. Second operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:11,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:11,379 INFO L93 Difference]: Finished difference Result 81 states and 197 transitions. [2021-09-22 14:25:11,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-09-22 14:25:11,380 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-09-22 14:25:11,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:11,380 INFO L225 Difference]: With dead ends: 81 [2021-09-22 14:25:11,380 INFO L226 Difference]: Without dead ends: 75 [2021-09-22 14:25:11,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 203.7ms TimeCoverageRelationStatistics Valid=259, Invalid=611, Unknown=0, NotChecked=0, Total=870 [2021-09-22 14:25:11,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-09-22 14:25:11,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2021-09-22 14:25:11,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.4925373134328357) internal successors, (167), 67 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:11,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2021-09-22 14:25:11,383 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 17 [2021-09-22 14:25:11,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:11,383 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2021-09-22 14:25:11,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:11,383 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2021-09-22 14:25:11,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-09-22 14:25:11,384 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:11,384 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:11,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:11,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:11,593 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:11,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:11,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1010115109, now seen corresponding path program 10 times [2021-09-22 14:25:11,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:11,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129798312] [2021-09-22 14:25:11,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:11,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:11,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:11,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:11,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:11,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129798312] [2021-09-22 14:25:11,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129798312] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:11,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154343390] [2021-09-22 14:25:11,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-09-22 14:25:11,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:11,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:11,690 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) [2021-09-22 14:25:11,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-09-22 14:25:11,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-09-22 14:25:11,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:11,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-09-22 14:25:11,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:11,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:11,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154343390] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:11,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:11,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-09-22 14:25:11,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147200119] [2021-09-22 14:25:11,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-09-22 14:25:11,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:11,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-09-22 14:25:11,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-09-22 14:25:11,832 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:12,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:12,135 INFO L93 Difference]: Finished difference Result 103 states and 247 transitions. [2021-09-22 14:25:12,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-09-22 14:25:12,136 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-09-22 14:25:12,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:12,136 INFO L225 Difference]: With dead ends: 103 [2021-09-22 14:25:12,136 INFO L226 Difference]: Without dead ends: 89 [2021-09-22 14:25:12,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 274.5ms TimeCoverageRelationStatistics Valid=379, Invalid=881, Unknown=0, NotChecked=0, Total=1260 [2021-09-22 14:25:12,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-09-22 14:25:12,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2021-09-22 14:25:12,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.464788732394366) internal successors, (175), 71 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:12,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 175 transitions. [2021-09-22 14:25:12,139 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 175 transitions. Word has length 17 [2021-09-22 14:25:12,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:12,139 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 175 transitions. [2021-09-22 14:25:12,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:12,139 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 175 transitions. [2021-09-22 14:25:12,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-09-22 14:25:12,140 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:12,140 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:12,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-09-22 14:25:12,348 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,SelfDestructingSolverStorable11 [2021-09-22 14:25:12,349 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:12,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:12,349 INFO L82 PathProgramCache]: Analyzing trace with hash 887437825, now seen corresponding path program 11 times [2021-09-22 14:25:12,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:12,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098626261] [2021-09-22 14:25:12,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:12,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:12,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:12,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:12,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098626261] [2021-09-22 14:25:12,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098626261] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:12,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225960072] [2021-09-22 14:25:12,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-09-22 14:25:12,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:12,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:12,426 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) [2021-09-22 14:25:12,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-09-22 14:25:12,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-09-22 14:25:12,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:12,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-09-22 14:25:12,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:12,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225960072] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:12,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:12,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-09-22 14:25:12,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005721149] [2021-09-22 14:25:12,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-09-22 14:25:12,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:12,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-09-22 14:25:12,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-09-22 14:25:12,589 INFO L87 Difference]: Start difference. First operand 72 states and 175 transitions. Second operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:12,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:12,850 INFO L93 Difference]: Finished difference Result 112 states and 270 transitions. [2021-09-22 14:25:12,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-09-22 14:25:12,850 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-09-22 14:25:12,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:12,851 INFO L225 Difference]: With dead ends: 112 [2021-09-22 14:25:12,851 INFO L226 Difference]: Without dead ends: 92 [2021-09-22 14:25:12,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 250.8ms TimeCoverageRelationStatistics Valid=335, Invalid=721, Unknown=0, NotChecked=0, Total=1056 [2021-09-22 14:25:12,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-09-22 14:25:12,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2021-09-22 14:25:12,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.466666666666667) internal successors, (185), 75 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:12,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 185 transitions. [2021-09-22 14:25:12,855 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 185 transitions. Word has length 17 [2021-09-22 14:25:12,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:12,855 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 185 transitions. [2021-09-22 14:25:12,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:12,855 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 185 transitions. [2021-09-22 14:25:12,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-09-22 14:25:12,855 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:12,856 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:12,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:13,064 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,SelfDestructingSolverStorable12 [2021-09-22 14:25:13,065 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:13,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:13,065 INFO L82 PathProgramCache]: Analyzing trace with hash -57720357, now seen corresponding path program 12 times [2021-09-22 14:25:13,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:13,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88207300] [2021-09-22 14:25:13,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:13,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-09-22 14:25:13,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:13,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88207300] [2021-09-22 14:25:13,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88207300] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:13,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973043035] [2021-09-22 14:25:13,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-09-22 14:25:13,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:13,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:13,154 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) [2021-09-22 14:25:13,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-09-22 14:25:13,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-09-22 14:25:13,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:13,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2021-09-22 14:25:13,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-09-22 14:25:13,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973043035] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:13,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:13,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-09-22 14:25:13,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63998268] [2021-09-22 14:25:13,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-09-22 14:25:13,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:13,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-09-22 14:25:13,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-09-22 14:25:13,325 INFO L87 Difference]: Start difference. First operand 76 states and 185 transitions. Second operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:13,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:13,599 INFO L93 Difference]: Finished difference Result 89 states and 217 transitions. [2021-09-22 14:25:13,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-09-22 14:25:13,599 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-09-22 14:25:13,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:13,600 INFO L225 Difference]: With dead ends: 89 [2021-09-22 14:25:13,600 INFO L226 Difference]: Without dead ends: 83 [2021-09-22 14:25:13,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 257.2ms TimeCoverageRelationStatistics Valid=368, Invalid=892, Unknown=0, NotChecked=0, Total=1260 [2021-09-22 14:25:13,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-09-22 14:25:13,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2021-09-22 14:25:13,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.493333333333333) internal successors, (187), 75 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:13,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 187 transitions. [2021-09-22 14:25:13,602 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 187 transitions. Word has length 19 [2021-09-22 14:25:13,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:13,602 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 187 transitions. [2021-09-22 14:25:13,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:13,602 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 187 transitions. [2021-09-22 14:25:13,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-09-22 14:25:13,603 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:13,603 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:13,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:13,812 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,SelfDestructingSolverStorable13 [2021-09-22 14:25:13,813 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:13,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:13,813 INFO L82 PathProgramCache]: Analyzing trace with hash -57718435, now seen corresponding path program 13 times [2021-09-22 14:25:13,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:13,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302314046] [2021-09-22 14:25:13,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:13,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:13,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:13,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302314046] [2021-09-22 14:25:13,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302314046] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:13,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373204174] [2021-09-22 14:25:13,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-09-22 14:25:13,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:13,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:13,918 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) [2021-09-22 14:25:13,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-09-22 14:25:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:14,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2021-09-22 14:25:14,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:14,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373204174] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:14,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:14,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-09-22 14:25:14,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841503134] [2021-09-22 14:25:14,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-09-22 14:25:14,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:14,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-09-22 14:25:14,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-09-22 14:25:14,102 INFO L87 Difference]: Start difference. First operand 76 states and 187 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:14,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:14,435 INFO L93 Difference]: Finished difference Result 95 states and 233 transitions. [2021-09-22 14:25:14,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-09-22 14:25:14,436 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-09-22 14:25:14,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:14,436 INFO L225 Difference]: With dead ends: 95 [2021-09-22 14:25:14,436 INFO L226 Difference]: Without dead ends: 83 [2021-09-22 14:25:14,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 320.8ms TimeCoverageRelationStatistics Valid=484, Invalid=1076, Unknown=0, NotChecked=0, Total=1560 [2021-09-22 14:25:14,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-09-22 14:25:14,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2021-09-22 14:25:14,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.4936708860759493) internal successors, (197), 79 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:14,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 197 transitions. [2021-09-22 14:25:14,438 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 197 transitions. Word has length 19 [2021-09-22 14:25:14,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:14,439 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 197 transitions. [2021-09-22 14:25:14,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:14,439 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 197 transitions. [2021-09-22 14:25:14,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-09-22 14:25:14,439 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:14,439 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:14,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:14,648 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,SelfDestructingSolverStorable14 [2021-09-22 14:25:14,649 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:14,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:14,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1870392001, now seen corresponding path program 14 times [2021-09-22 14:25:14,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:14,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117694212] [2021-09-22 14:25:14,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:14,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:14,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:14,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117694212] [2021-09-22 14:25:14,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117694212] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:14,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904381362] [2021-09-22 14:25:14,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-09-22 14:25:14,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:14,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:14,752 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) [2021-09-22 14:25:14,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-09-22 14:25:14,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-09-22 14:25:14,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:14,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2021-09-22 14:25:14,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:15,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904381362] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:15,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:15,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-09-22 14:25:15,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112514175] [2021-09-22 14:25:15,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-09-22 14:25:15,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:15,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-09-22 14:25:15,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-09-22 14:25:15,014 INFO L87 Difference]: Start difference. First operand 80 states and 197 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:15,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:15,381 INFO L93 Difference]: Finished difference Result 101 states and 247 transitions. [2021-09-22 14:25:15,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-09-22 14:25:15,381 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-09-22 14:25:15,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:15,382 INFO L225 Difference]: With dead ends: 101 [2021-09-22 14:25:15,382 INFO L226 Difference]: Without dead ends: 86 [2021-09-22 14:25:15,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 304.4ms TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2021-09-22 14:25:15,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-09-22 14:25:15,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2021-09-22 14:25:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 53 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2021-09-22 14:25:15,385 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 19 [2021-09-22 14:25:15,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:15,386 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2021-09-22 14:25:15,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:15,386 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2021-09-22 14:25:15,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-09-22 14:25:15,386 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:15,386 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:15,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:15,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-09-22 14:25:15,600 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:15,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:15,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2147401113, now seen corresponding path program 15 times [2021-09-22 14:25:15,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:15,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510282825] [2021-09-22 14:25:15,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:15,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:15,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:15,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510282825] [2021-09-22 14:25:15,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510282825] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:15,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818636289] [2021-09-22 14:25:15,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-09-22 14:25:15,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:15,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:15,737 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) [2021-09-22 14:25:15,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-09-22 14:25:15,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-09-22 14:25:15,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:15,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2021-09-22 14:25:15,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:15,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818636289] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:15,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:15,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-09-22 14:25:15,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029968757] [2021-09-22 14:25:15,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-09-22 14:25:15,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:15,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-09-22 14:25:15,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-09-22 14:25:15,947 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:16,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:16,445 INFO L93 Difference]: Finished difference Result 98 states and 241 transitions. [2021-09-22 14:25:16,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-09-22 14:25:16,445 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-09-22 14:25:16,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:16,445 INFO L225 Difference]: With dead ends: 98 [2021-09-22 14:25:16,445 INFO L226 Difference]: Without dead ends: 86 [2021-09-22 14:25:16,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 471.5ms TimeCoverageRelationStatistics Valid=561, Invalid=1245, Unknown=0, NotChecked=0, Total=1806 [2021-09-22 14:25:16,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-09-22 14:25:16,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2021-09-22 14:25:16,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.490566037735849) internal successors, (132), 53 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:16,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2021-09-22 14:25:16,448 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 20 [2021-09-22 14:25:16,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:16,448 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2021-09-22 14:25:16,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:16,448 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2021-09-22 14:25:16,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-09-22 14:25:16,448 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:16,448 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:16,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:16,649 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,SelfDestructingSolverStorable16 [2021-09-22 14:25:16,649 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:16,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:16,649 INFO L82 PathProgramCache]: Analyzing trace with hash 367451231, now seen corresponding path program 16 times [2021-09-22 14:25:16,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:16,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031961526] [2021-09-22 14:25:16,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:16,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:16,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:16,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031961526] [2021-09-22 14:25:16,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031961526] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:16,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400197582] [2021-09-22 14:25:16,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-09-22 14:25:16,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:16,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:16,793 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) [2021-09-22 14:25:16,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-09-22 14:25:16,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-09-22 14:25:16,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:16,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2021-09-22 14:25:16,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:16,995 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:16,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400197582] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:16,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:16,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-09-22 14:25:16,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312584345] [2021-09-22 14:25:16,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-09-22 14:25:16,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:17,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-09-22 14:25:17,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-09-22 14:25:17,002 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:17,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:17,426 INFO L93 Difference]: Finished difference Result 114 states and 276 transitions. [2021-09-22 14:25:17,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-09-22 14:25:17,427 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-09-22 14:25:17,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:17,427 INFO L225 Difference]: With dead ends: 114 [2021-09-22 14:25:17,427 INFO L226 Difference]: Without dead ends: 100 [2021-09-22 14:25:17,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 422.8ms TimeCoverageRelationStatistics Valid=677, Invalid=1579, Unknown=0, NotChecked=0, Total=2256 [2021-09-22 14:25:17,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-09-22 14:25:17,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 75. [2021-09-22 14:25:17,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.581081081081081) internal successors, (191), 74 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:17,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 191 transitions. [2021-09-22 14:25:17,430 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 191 transitions. Word has length 21 [2021-09-22 14:25:17,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:17,430 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 191 transitions. [2021-09-22 14:25:17,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:17,430 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 191 transitions. [2021-09-22 14:25:17,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-09-22 14:25:17,430 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:17,430 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:17,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:17,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:17,631 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:17,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:17,631 INFO L82 PathProgramCache]: Analyzing trace with hash 2068459931, now seen corresponding path program 17 times [2021-09-22 14:25:17,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:17,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43034785] [2021-09-22 14:25:17,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:17,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:17,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:17,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43034785] [2021-09-22 14:25:17,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43034785] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:17,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661471083] [2021-09-22 14:25:17,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-09-22 14:25:17,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:17,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:17,755 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) [2021-09-22 14:25:17,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-09-22 14:25:17,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-09-22 14:25:17,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:17,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2021-09-22 14:25:17,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:18,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661471083] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:18,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:18,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-09-22 14:25:18,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073904126] [2021-09-22 14:25:18,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-09-22 14:25:18,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:18,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-09-22 14:25:18,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-09-22 14:25:18,028 INFO L87 Difference]: Start difference. First operand 75 states and 191 transitions. Second operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:18,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:18,485 INFO L93 Difference]: Finished difference Result 120 states and 289 transitions. [2021-09-22 14:25:18,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-09-22 14:25:18,486 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-09-22 14:25:18,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:18,486 INFO L225 Difference]: With dead ends: 120 [2021-09-22 14:25:18,486 INFO L226 Difference]: Without dead ends: 106 [2021-09-22 14:25:18,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 432.5ms TimeCoverageRelationStatistics Valid=767, Invalid=1783, Unknown=0, NotChecked=0, Total=2550 [2021-09-22 14:25:18,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-09-22 14:25:18,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 60. [2021-09-22 14:25:18,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.4745762711864407) internal successors, (146), 59 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:18,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 146 transitions. [2021-09-22 14:25:18,489 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 146 transitions. Word has length 22 [2021-09-22 14:25:18,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:18,489 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 146 transitions. [2021-09-22 14:25:18,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:18,490 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 146 transitions. [2021-09-22 14:25:18,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-09-22 14:25:18,490 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:18,490 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:18,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:18,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:18,707 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:18,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:18,708 INFO L82 PathProgramCache]: Analyzing trace with hash 933605215, now seen corresponding path program 18 times [2021-09-22 14:25:18,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:18,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935976476] [2021-09-22 14:25:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:18,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-09-22 14:25:18,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:18,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935976476] [2021-09-22 14:25:18,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935976476] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:18,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457612840] [2021-09-22 14:25:18,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-09-22 14:25:18,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:18,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:18,861 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) [2021-09-22 14:25:18,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-09-22 14:25:19,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-09-22 14:25:19,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:19,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2021-09-22 14:25:19,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-09-22 14:25:19,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457612840] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:19,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:19,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-09-22 14:25:19,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280291518] [2021-09-22 14:25:19,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-09-22 14:25:19,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:19,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-09-22 14:25:19,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-09-22 14:25:19,108 INFO L87 Difference]: Start difference. First operand 60 states and 146 transitions. Second operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:19,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:19,634 INFO L93 Difference]: Finished difference Result 106 states and 259 transitions. [2021-09-22 14:25:19,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-09-22 14:25:19,634 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-09-22 14:25:19,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:19,635 INFO L225 Difference]: With dead ends: 106 [2021-09-22 14:25:19,635 INFO L226 Difference]: Without dead ends: 100 [2021-09-22 14:25:19,635 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 505.3ms TimeCoverageRelationStatistics Valid=643, Invalid=1613, Unknown=0, NotChecked=0, Total=2256 [2021-09-22 14:25:19,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-09-22 14:25:19,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 78. [2021-09-22 14:25:19,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.5844155844155843) internal successors, (199), 77 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:19,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 199 transitions. [2021-09-22 14:25:19,641 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 199 transitions. Word has length 23 [2021-09-22 14:25:19,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:19,641 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 199 transitions. [2021-09-22 14:25:19,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:19,641 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 199 transitions. [2021-09-22 14:25:19,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-09-22 14:25:19,641 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:19,641 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:19,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:19,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:19,853 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:19,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:19,853 INFO L82 PathProgramCache]: Analyzing trace with hash 933607137, now seen corresponding path program 19 times [2021-09-22 14:25:19,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:19,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561525034] [2021-09-22 14:25:19,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:19,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:19,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:19,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561525034] [2021-09-22 14:25:19,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561525034] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:19,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779146534] [2021-09-22 14:25:19,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-09-22 14:25:19,991 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:19,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:19,992 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-09-22 14:25:19,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-09-22 14:25:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:20,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2021-09-22 14:25:20,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:20,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779146534] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:20,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:20,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-09-22 14:25:20,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680794543] [2021-09-22 14:25:20,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-09-22 14:25:20,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:20,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-09-22 14:25:20,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-09-22 14:25:20,227 INFO L87 Difference]: Start difference. First operand 78 states and 199 transitions. Second operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:20,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:20,709 INFO L93 Difference]: Finished difference Result 112 states and 275 transitions. [2021-09-22 14:25:20,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-09-22 14:25:20,709 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-09-22 14:25:20,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:20,710 INFO L225 Difference]: With dead ends: 112 [2021-09-22 14:25:20,710 INFO L226 Difference]: Without dead ends: 100 [2021-09-22 14:25:20,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 463.4ms TimeCoverageRelationStatistics Valid=818, Invalid=1834, Unknown=0, NotChecked=0, Total=2652 [2021-09-22 14:25:20,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-09-22 14:25:20,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2021-09-22 14:25:20,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.5875) internal successors, (207), 80 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:20,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 207 transitions. [2021-09-22 14:25:20,715 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 207 transitions. Word has length 23 [2021-09-22 14:25:20,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:20,716 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 207 transitions. [2021-09-22 14:25:20,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:20,717 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 207 transitions. [2021-09-22 14:25:20,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-09-22 14:25:20,717 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:20,717 INFO L512 BasicCegarLoop]: trace histogram [9, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:20,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:20,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:20,918 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:20,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:20,918 INFO L82 PathProgramCache]: Analyzing trace with hash -779573861, now seen corresponding path program 20 times [2021-09-22 14:25:20,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:20,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264325312] [2021-09-22 14:25:20,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:20,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-09-22 14:25:21,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:21,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264325312] [2021-09-22 14:25:21,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264325312] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:21,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627300862] [2021-09-22 14:25:21,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-09-22 14:25:21,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:21,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:21,046 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-09-22 14:25:21,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-09-22 14:25:21,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-09-22 14:25:21,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:21,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 21 conjunts are in the unsatisfiable core [2021-09-22 14:25:21,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-09-22 14:25:21,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627300862] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:21,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:21,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-09-22 14:25:21,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230146067] [2021-09-22 14:25:21,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-09-22 14:25:21,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:21,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-09-22 14:25:21,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-09-22 14:25:21,302 INFO L87 Difference]: Start difference. First operand 81 states and 207 transitions. Second operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:21,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:21,813 INFO L93 Difference]: Finished difference Result 108 states and 265 transitions. [2021-09-22 14:25:21,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-09-22 14:25:21,813 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-09-22 14:25:21,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:21,814 INFO L225 Difference]: With dead ends: 108 [2021-09-22 14:25:21,814 INFO L226 Difference]: Without dead ends: 102 [2021-09-22 14:25:21,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 505.1ms TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2021-09-22 14:25:21,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-09-22 14:25:21,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 62. [2021-09-22 14:25:21,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4754098360655736) internal successors, (151), 61 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:21,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2021-09-22 14:25:21,816 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 24 [2021-09-22 14:25:21,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:21,816 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2021-09-22 14:25:21,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:21,816 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2021-09-22 14:25:21,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-09-22 14:25:21,816 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:21,816 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:21,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:22,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:22,017 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:22,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:22,017 INFO L82 PathProgramCache]: Analyzing trace with hash -779571939, now seen corresponding path program 21 times [2021-09-22 14:25:22,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:22,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186488929] [2021-09-22 14:25:22,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:22,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:22,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:22,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186488929] [2021-09-22 14:25:22,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186488929] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:22,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904236971] [2021-09-22 14:25:22,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-09-22 14:25:22,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:22,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:22,199 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-09-22 14:25:22,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-09-22 14:25:22,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-09-22 14:25:22,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:22,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 22 conjunts are in the unsatisfiable core [2021-09-22 14:25:22,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:22,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904236971] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:22,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:22,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-09-22 14:25:22,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115921225] [2021-09-22 14:25:22,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-09-22 14:25:22,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:22,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-09-22 14:25:22,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-09-22 14:25:22,494 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:23,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:23,079 INFO L93 Difference]: Finished difference Result 114 states and 281 transitions. [2021-09-22 14:25:23,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-09-22 14:25:23,080 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-09-22 14:25:23,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:23,080 INFO L225 Difference]: With dead ends: 114 [2021-09-22 14:25:23,080 INFO L226 Difference]: Without dead ends: 102 [2021-09-22 14:25:23,081 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 583.9ms TimeCoverageRelationStatistics Valid=917, Invalid=2053, Unknown=0, NotChecked=0, Total=2970 [2021-09-22 14:25:23,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-09-22 14:25:23,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 62. [2021-09-22 14:25:23,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4918032786885247) internal successors, (152), 61 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:23,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2021-09-22 14:25:23,083 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 24 [2021-09-22 14:25:23,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:23,083 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2021-09-22 14:25:23,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:23,083 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2021-09-22 14:25:23,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-09-22 14:25:23,083 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:23,083 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:23,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:23,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:23,293 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:23,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:23,293 INFO L82 PathProgramCache]: Analyzing trace with hash -451413789, now seen corresponding path program 22 times [2021-09-22 14:25:23,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:23,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789446876] [2021-09-22 14:25:23,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:23,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:23,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:23,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:23,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789446876] [2021-09-22 14:25:23,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789446876] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:23,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712893352] [2021-09-22 14:25:23,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-09-22 14:25:23,446 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:23,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:23,453 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-09-22 14:25:23,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-09-22 14:25:23,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-09-22 14:25:23,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:23,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 23 conjunts are in the unsatisfiable core [2021-09-22 14:25:23,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:23,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712893352] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:23,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:23,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-09-22 14:25:23,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231274587] [2021-09-22 14:25:23,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-09-22 14:25:23,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:23,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-09-22 14:25:23,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-09-22 14:25:23,745 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:24,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:24,318 INFO L93 Difference]: Finished difference Result 118 states and 291 transitions. [2021-09-22 14:25:24,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-09-22 14:25:24,319 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-09-22 14:25:24,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:24,319 INFO L225 Difference]: With dead ends: 118 [2021-09-22 14:25:24,319 INFO L226 Difference]: Without dead ends: 106 [2021-09-22 14:25:24,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 561.7ms TimeCoverageRelationStatistics Valid=1018, Invalid=2288, Unknown=0, NotChecked=0, Total=3306 [2021-09-22 14:25:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-09-22 14:25:24,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 66. [2021-09-22 14:25:24,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.476923076923077) internal successors, (161), 65 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) [2021-09-22 14:25:24,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2021-09-22 14:25:24,322 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 25 [2021-09-22 14:25:24,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:24,322 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2021-09-22 14:25:24,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:24,323 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2021-09-22 14:25:24,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-09-22 14:25:24,323 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:24,323 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:24,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:24,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-09-22 14:25:24,523 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:24,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:24,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1844031457, now seen corresponding path program 23 times [2021-09-22 14:25:24,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:24,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763605430] [2021-09-22 14:25:24,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:24,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:24,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:24,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763605430] [2021-09-22 14:25:24,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763605430] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:24,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197422293] [2021-09-22 14:25:24,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-09-22 14:25:24,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:24,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:24,685 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-09-22 14:25:24,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-09-22 14:25:24,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-09-22 14:25:24,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:24,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2021-09-22 14:25:24,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:25,004 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:25,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197422293] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:25,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:25,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-09-22 14:25:25,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292127178] [2021-09-22 14:25:25,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-09-22 14:25:25,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:25,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-09-22 14:25:25,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-09-22 14:25:25,006 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:25,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:25,671 INFO L93 Difference]: Finished difference Result 138 states and 335 transitions. [2021-09-22 14:25:25,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-09-22 14:25:25,672 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-09-22 14:25:25,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:25,672 INFO L225 Difference]: With dead ends: 138 [2021-09-22 14:25:25,672 INFO L226 Difference]: Without dead ends: 124 [2021-09-22 14:25:25,673 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 665.8ms TimeCoverageRelationStatistics Valid=1175, Invalid=2731, Unknown=0, NotChecked=0, Total=3906 [2021-09-22 14:25:25,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-09-22 14:25:25,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 90. [2021-09-22 14:25:25,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.595505617977528) internal successors, (231), 89 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:25,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 231 transitions. [2021-09-22 14:25:25,675 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 231 transitions. Word has length 26 [2021-09-22 14:25:25,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:25,675 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 231 transitions. [2021-09-22 14:25:25,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:25,675 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 231 transitions. [2021-09-22 14:25:25,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-09-22 14:25:25,676 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:25,676 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:25,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:25,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-09-22 14:25:25,885 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:25,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:25,885 INFO L82 PathProgramCache]: Analyzing trace with hash -16661915, now seen corresponding path program 24 times [2021-09-22 14:25:25,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:25,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385312827] [2021-09-22 14:25:25,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:25,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:26,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:26,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385312827] [2021-09-22 14:25:26,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385312827] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:26,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895492961] [2021-09-22 14:25:26,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-09-22 14:25:26,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:26,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:26,050 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-09-22 14:25:26,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-09-22 14:25:26,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-09-22 14:25:26,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:26,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 25 conjunts are in the unsatisfiable core [2021-09-22 14:25:26,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:26,379 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:26,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895492961] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:26,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:26,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-09-22 14:25:26,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883254297] [2021-09-22 14:25:26,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-09-22 14:25:26,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:26,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-09-22 14:25:26,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-09-22 14:25:26,381 INFO L87 Difference]: Start difference. First operand 90 states and 231 transitions. Second operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:27,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:27,062 INFO L93 Difference]: Finished difference Result 140 states and 340 transitions. [2021-09-22 14:25:27,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-09-22 14:25:27,063 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-09-22 14:25:27,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:27,063 INFO L225 Difference]: With dead ends: 140 [2021-09-22 14:25:27,063 INFO L226 Difference]: Without dead ends: 126 [2021-09-22 14:25:27,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 686.6ms TimeCoverageRelationStatistics Valid=1289, Invalid=3001, Unknown=0, NotChecked=0, Total=4290 [2021-09-22 14:25:27,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-09-22 14:25:27,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2021-09-22 14:25:27,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.464788732394366) internal successors, (175), 71 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:27,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 175 transitions. [2021-09-22 14:25:27,066 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 175 transitions. Word has length 27 [2021-09-22 14:25:27,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:27,066 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 175 transitions. [2021-09-22 14:25:27,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:27,066 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 175 transitions. [2021-09-22 14:25:27,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-09-22 14:25:27,067 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:27,067 INFO L512 BasicCegarLoop]: trace histogram [11, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:27,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:27,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-09-22 14:25:27,272 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:27,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:27,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1707553567, now seen corresponding path program 25 times [2021-09-22 14:25:27,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:27,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599119644] [2021-09-22 14:25:27,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:27,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 81 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:27,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:27,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599119644] [2021-09-22 14:25:27,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599119644] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:27,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809174891] [2021-09-22 14:25:27,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-09-22 14:25:27,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:27,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:27,362 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-09-22 14:25:27,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-09-22 14:25:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:27,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2021-09-22 14:25:27,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:27,665 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:27,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809174891] provided 1 perfect and 0 imperfect interpolant sequences [2021-09-22 14:25:27,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-09-22 14:25:27,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2021-09-22 14:25:27,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599207611] [2021-09-22 14:25:27,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-09-22 14:25:27,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:27,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-09-22 14:25:27,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-09-22 14:25:27,666 INFO L87 Difference]: Start difference. First operand 72 states and 175 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:27,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:27,685 INFO L93 Difference]: Finished difference Result 289 states and 658 transitions. [2021-09-22 14:25:27,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-09-22 14:25:27,685 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-09-22 14:25:27,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:27,686 INFO L225 Difference]: With dead ends: 289 [2021-09-22 14:25:27,686 INFO L226 Difference]: Without dead ends: 70 [2021-09-22 14:25:27,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-09-22 14:25:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-09-22 14:25:27,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-09-22 14:25:27,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:27,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 141 transitions. [2021-09-22 14:25:27,688 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 141 transitions. Word has length 28 [2021-09-22 14:25:27,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:27,688 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 141 transitions. [2021-09-22 14:25:27,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:27,688 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 141 transitions. [2021-09-22 14:25:27,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-09-22 14:25:27,688 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:27,688 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:27,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:27,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:27,905 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:27,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:27,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1707555489, now seen corresponding path program 26 times [2021-09-22 14:25:27,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:27,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241084329] [2021-09-22 14:25:27,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:27,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-09-22 14:25:27,917 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-09-22 14:25:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-09-22 14:25:27,944 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-09-22 14:25:27,944 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-09-22 14:25:27,945 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-09-22 14:25:27,946 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-09-22 14:25:27,946 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-09-22 14:25:27,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-09-22 14:25:27,950 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-09-22 14:25:27,950 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-09-22 14:25:28,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.09 02:25:28 BasicIcfg [2021-09-22 14:25:28,010 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-09-22 14:25:28,011 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-09-22 14:25:28,011 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-09-22 14:25:28,011 INFO L275 PluginConnector]: Witness Printer initialized [2021-09-22 14:25:28,012 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.09 02:25:04" (3/4) ... [2021-09-22 14:25:28,013 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-09-22 14:25:28,061 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-09-22 14:25:28,061 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-09-22 14:25:28,062 INFO L168 Benchmark]: Toolchain (without parser) took 24339.14 ms. Allocated memory was 52.4 MB in the beginning and 174.1 MB in the end (delta: 121.6 MB). Free memory was 28.4 MB in the beginning and 98.9 MB in the end (delta: -70.5 MB). Peak memory consumption was 50.6 MB. Max. memory is 16.1 GB. [2021-09-22 14:25:28,063 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 52.4 MB. Free memory was 34.8 MB in the beginning and 34.7 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-09-22 14:25:28,063 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.72 ms. Allocated memory was 52.4 MB in the beginning and 67.1 MB in the end (delta: 14.7 MB). Free memory was 28.1 MB in the beginning and 42.9 MB in the end (delta: -14.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2021-09-22 14:25:28,063 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.90 ms. Allocated memory is still 67.1 MB. Free memory was 42.7 MB in the beginning and 40.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-09-22 14:25:28,064 INFO L168 Benchmark]: Boogie Preprocessor took 13.13 ms. Allocated memory is still 67.1 MB. Free memory was 40.9 MB in the beginning and 39.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-09-22 14:25:28,064 INFO L168 Benchmark]: RCFGBuilder took 335.46 ms. Allocated memory is still 67.1 MB. Free memory was 39.6 MB in the beginning and 42.9 MB in the end (delta: -3.3 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2021-09-22 14:25:28,064 INFO L168 Benchmark]: TraceAbstraction took 23584.33 ms. Allocated memory was 67.1 MB in the beginning and 174.1 MB in the end (delta: 107.0 MB). Free memory was 42.4 MB in the beginning and 107.2 MB in the end (delta: -64.8 MB). Peak memory consumption was 41.8 MB. Max. memory is 16.1 GB. [2021-09-22 14:25:28,065 INFO L168 Benchmark]: Witness Printer took 50.33 ms. Allocated memory is still 174.1 MB. Free memory was 107.2 MB in the beginning and 98.9 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-09-22 14:25:28,066 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 52.4 MB. Free memory was 34.8 MB in the beginning and 34.7 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 318.72 ms. Allocated memory was 52.4 MB in the beginning and 67.1 MB in the end (delta: 14.7 MB). Free memory was 28.1 MB in the beginning and 42.9 MB in the end (delta: -14.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 22.90 ms. Allocated memory is still 67.1 MB. Free memory was 42.7 MB in the beginning and 40.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 13.13 ms. Allocated memory is still 67.1 MB. Free memory was 40.9 MB in the beginning and 39.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 335.46 ms. Allocated memory is still 67.1 MB. Free memory was 39.6 MB in the beginning and 42.9 MB in the end (delta: -3.3 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 23584.33 ms. Allocated memory was 67.1 MB in the beginning and 174.1 MB in the end (delta: 107.0 MB). Free memory was 42.4 MB in the beginning and 107.2 MB in the end (delta: -64.8 MB). Peak memory consumption was 41.8 MB. Max. memory is 16.1 GB. * Witness Printer took 50.33 ms. Allocated memory is still 174.1 MB. Free memory was 107.2 MB in the beginning and 98.9 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2080.4ms, 68 PlacesBefore, 20 PlacesAfterwards, 66 TransitionsBefore, 15 TransitionsAfterwards, 1078 CoEnabledTransitionPairs, 6 FixpointIterations, 18 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 58 TotalNumberOfCompositions, 1010 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 867, positive: 842, positive conditional: 0, positive unconditional: 842, negative: 25, negative conditional: 0, negative unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 710, positive: 695, positive conditional: 0, positive unconditional: 695, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 710, positive: 695, positive conditional: 0, positive unconditional: 695, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 15, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 17, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 17, negative conditional: 0, negative unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 867, positive: 147, positive conditional: 0, positive unconditional: 147, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 710, unknown conditional: 0, unknown unconditional: 710] , Statistics on independence cache: Total cache size (in pairs): 16, Positive cache size: 13, Positive conditional cache size: 0, Positive unconditional cache size: 13, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, k=5] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=7] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=10] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L716] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L719] 0 int condJ = j >= (2*10 +6); [L721] COND TRUE 0 condI || condJ [L722] 0 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 23428.7ms, OverallIterations: 28, TraceHistogramMax: 11, EmptinessCheckTime: 14.6ms, AutomataDifference: 8594.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2118.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 529 SDtfs, 2659 SDslu, 1642 SDs, 0 SdLazy, 2392 SolverSat, 1880 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1591.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1281 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 883 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9425 ImplicationChecksByTransitivity, 8092.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=25, InterpolantAutomatonStates: 657, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 78.0ms AutomataMinimizationTime, 27 MinimizatonAttempts, 581 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 187.7ms SsaConstructionTime, 627.2ms SatisfiabilityAnalysisTime, 4197.6ms InterpolantComputationTime, 966 NumberOfCodeBlocks, 966 NumberOfCodeBlocksAsserted, 115 NumberOfCheckSat, 888 ConstructedInterpolants, 0 QuantifiedInterpolants, 3076 SizeOfPredicates, 243 NumberOfNonLiveVariables, 3502 ConjunctsInSsa, 390 ConjunctsInUnsatCore, 50 InterpolantComputations, 5 PerfectInterpolantSequences, 182/1570 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-09-22 14:25:28,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...