./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label19.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/eca-rers2012/Problem03_label19.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dbab4b57592d1cd844f46032ce61618d4e076adc5adb242b34e740348fe0a295 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 22:46:46,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 22:46:46,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 22:46:46,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 22:46:46,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 22:46:46,646 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 22:46:46,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 22:46:46,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 22:46:46,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 22:46:46,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 22:46:46,658 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 22:46:46,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 22:46:46,663 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 22:46:46,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 22:46:46,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 22:46:46,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 22:46:46,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 22:46:46,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 22:46:46,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 22:46:46,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 22:46:46,682 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 22:46:46,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 22:46:46,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 22:46:46,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 22:46:46,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 22:46:46,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 22:46:46,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 22:46:46,690 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 22:46:46,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 22:46:46,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 22:46:46,691 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 22:46:46,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 22:46:46,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 22:46:46,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 22:46:46,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 22:46:46,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 22:46:46,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 22:46:46,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 22:46:46,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 22:46:46,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 22:46:46,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 22:46:46,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 22:46:46,701 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 22:46:46,733 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 22:46:46,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 22:46:46,734 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 22:46:46,734 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 22:46:46,735 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 22:46:46,735 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 22:46:46,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 22:46:46,736 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 22:46:46,737 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 22:46:46,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 22:46:46,738 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 22:46:46,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 22:46:46,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 22:46:46,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 22:46:46,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 22:46:46,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 22:46:46,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 22:46:46,739 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 22:46:46,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 22:46:46,739 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 22:46:46,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 22:46:46,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 22:46:46,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 22:46:46,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 22:46:46,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:46:46,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 22:46:46,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 22:46:46,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 22:46:46,741 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 22:46:46,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 22:46:46,741 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 22:46:46,742 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 22:46:46,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 22:46:46,742 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dbab4b57592d1cd844f46032ce61618d4e076adc5adb242b34e740348fe0a295 [2022-07-20 22:46:47,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 22:46:47,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 22:46:47,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 22:46:47,040 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 22:46:47,040 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 22:46:47,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label19.c [2022-07-20 22:46:47,098 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7952ba447/97f2b600fcd548fb9f8c8705440fb24c/FLAG36178715c [2022-07-20 22:46:47,550 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 22:46:47,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label19.c [2022-07-20 22:46:47,565 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7952ba447/97f2b600fcd548fb9f8c8705440fb24c/FLAG36178715c [2022-07-20 22:46:47,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7952ba447/97f2b600fcd548fb9f8c8705440fb24c [2022-07-20 22:46:47,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 22:46:47,847 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 22:46:47,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 22:46:47,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 22:46:47,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 22:46:47,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:46:47" (1/1) ... [2022-07-20 22:46:47,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f94fe37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:47, skipping insertion in model container [2022-07-20 22:46:47,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:46:47" (1/1) ... [2022-07-20 22:46:47,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 22:46:47,896 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 22:46:48,271 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label19.c[59475,59488] [2022-07-20 22:46:48,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:46:48,299 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 22:46:48,441 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label19.c[59475,59488] [2022-07-20 22:46:48,448 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:46:48,461 INFO L208 MainTranslator]: Completed translation [2022-07-20 22:46:48,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:48 WrapperNode [2022-07-20 22:46:48,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 22:46:48,462 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 22:46:48,462 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 22:46:48,463 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 22:46:48,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:48" (1/1) ... [2022-07-20 22:46:48,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:48" (1/1) ... [2022-07-20 22:46:48,594 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-07-20 22:46:48,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 22:46:48,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 22:46:48,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 22:46:48,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 22:46:48,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:48" (1/1) ... [2022-07-20 22:46:48,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:48" (1/1) ... [2022-07-20 22:46:48,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:48" (1/1) ... [2022-07-20 22:46:48,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:48" (1/1) ... [2022-07-20 22:46:48,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:48" (1/1) ... [2022-07-20 22:46:48,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:48" (1/1) ... [2022-07-20 22:46:48,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:48" (1/1) ... [2022-07-20 22:46:48,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 22:46:48,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 22:46:48,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 22:46:48,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 22:46:48,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:48" (1/1) ... [2022-07-20 22:46:48,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:46:48,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:46:48,737 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) [2022-07-20 22:46:48,755 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 [2022-07-20 22:46:48,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 22:46:48,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 22:46:48,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 22:46:48,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 22:46:48,834 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 22:46:48,835 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 22:46:50,042 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 22:46:50,054 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 22:46:50,054 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-20 22:46:50,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:46:50 BoogieIcfgContainer [2022-07-20 22:46:50,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 22:46:50,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 22:46:50,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 22:46:50,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 22:46:50,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:46:47" (1/3) ... [2022-07-20 22:46:50,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3e6b7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:46:50, skipping insertion in model container [2022-07-20 22:46:50,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:48" (2/3) ... [2022-07-20 22:46:50,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3e6b7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:46:50, skipping insertion in model container [2022-07-20 22:46:50,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:46:50" (3/3) ... [2022-07-20 22:46:50,062 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label19.c [2022-07-20 22:46:50,072 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 22:46:50,073 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 22:46:50,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 22:46:50,129 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@431a0512, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2d6bb500 [2022-07-20 22:46:50,130 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 22:46:50,134 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:50,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-07-20 22:46:50,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:46:50,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:46:50,151 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:46:50,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:46:50,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1077687485, now seen corresponding path program 1 times [2022-07-20 22:46:50,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:46:50,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572300281] [2022-07-20 22:46:50,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:46:50,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:46:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:46:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:46:50,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:46:50,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572300281] [2022-07-20 22:46:50,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572300281] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:46:50,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:46:50,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:46:50,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411933236] [2022-07-20 22:46:50,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:46:50,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:46:50,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:46:50,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:46:50,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:46:50,714 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 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) [2022-07-20 22:46:51,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:46:51,613 INFO L93 Difference]: Finished difference Result 857 states and 1498 transitions. [2022-07-20 22:46:51,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:46:51,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 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) Word has length 187 [2022-07-20 22:46:51,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:46:51,625 INFO L225 Difference]: With dead ends: 857 [2022-07-20 22:46:51,625 INFO L226 Difference]: Without dead ends: 462 [2022-07-20 22:46:51,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:46:51,630 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 101 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:46:51,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 187 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 22:46:51,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-07-20 22:46:51,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2022-07-20 22:46:51,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.5381263616557734) internal successors, (706), 459 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:51,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 706 transitions. [2022-07-20 22:46:51,676 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 706 transitions. Word has length 187 [2022-07-20 22:46:51,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:46:51,677 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 706 transitions. [2022-07-20 22:46:51,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 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) [2022-07-20 22:46:51,677 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 706 transitions. [2022-07-20 22:46:51,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-20 22:46:51,680 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:46:51,680 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:46:51,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 22:46:51,681 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:46:51,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:46:51,682 INFO L85 PathProgramCache]: Analyzing trace with hash 365635140, now seen corresponding path program 1 times [2022-07-20 22:46:51,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:46:51,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910016396] [2022-07-20 22:46:51,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:46:51,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:46:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:46:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:46:51,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:46:51,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910016396] [2022-07-20 22:46:51,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910016396] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:46:51,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:46:51,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:46:51,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043682016] [2022-07-20 22:46:51,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:46:51,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:46:51,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:46:51,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:46:51,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:46:51,783 INFO L87 Difference]: Start difference. First operand 460 states and 706 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:52,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:46:52,424 INFO L93 Difference]: Finished difference Result 1344 states and 2079 transitions. [2022-07-20 22:46:52,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:46:52,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 195 [2022-07-20 22:46:52,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:46:52,428 INFO L225 Difference]: With dead ends: 1344 [2022-07-20 22:46:52,428 INFO L226 Difference]: Without dead ends: 886 [2022-07-20 22:46:52,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:46:52,435 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:46:52,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:46:52,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-07-20 22:46:52,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 870. [2022-07-20 22:46:52,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.5132336018411967) internal successors, (1315), 869 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:52,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1315 transitions. [2022-07-20 22:46:52,467 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1315 transitions. Word has length 195 [2022-07-20 22:46:52,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:46:52,467 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 1315 transitions. [2022-07-20 22:46:52,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:52,467 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1315 transitions. [2022-07-20 22:46:52,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-07-20 22:46:52,475 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:46:52,476 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:46:52,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 22:46:52,476 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:46:52,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:46:52,477 INFO L85 PathProgramCache]: Analyzing trace with hash 750887865, now seen corresponding path program 1 times [2022-07-20 22:46:52,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:46:52,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514319197] [2022-07-20 22:46:52,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:46:52,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:46:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:46:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 22:46:52,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:46:52,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514319197] [2022-07-20 22:46:52,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514319197] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:46:52,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:46:52,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:46:52,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417098324] [2022-07-20 22:46:52,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:46:52,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:46:52,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:46:52,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:46:52,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:46:52,747 INFO L87 Difference]: Start difference. First operand 870 states and 1315 transitions. Second operand has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 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) [2022-07-20 22:46:53,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:46:53,467 INFO L93 Difference]: Finished difference Result 1884 states and 2886 transitions. [2022-07-20 22:46:53,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:46:53,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 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) Word has length 202 [2022-07-20 22:46:53,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:46:53,472 INFO L225 Difference]: With dead ends: 1884 [2022-07-20 22:46:53,472 INFO L226 Difference]: Without dead ends: 842 [2022-07-20 22:46:53,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:46:53,474 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 331 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:46:53,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 47 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 22:46:53,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-07-20 22:46:53,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 842. [2022-07-20 22:46:53,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 1.3650416171224733) internal successors, (1148), 841 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:53,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1148 transitions. [2022-07-20 22:46:53,493 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1148 transitions. Word has length 202 [2022-07-20 22:46:53,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:46:53,494 INFO L495 AbstractCegarLoop]: Abstraction has 842 states and 1148 transitions. [2022-07-20 22:46:53,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 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) [2022-07-20 22:46:53,494 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1148 transitions. [2022-07-20 22:46:53,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-07-20 22:46:53,497 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:46:53,497 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:46:53,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 22:46:53,498 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:46:53,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:46:53,505 INFO L85 PathProgramCache]: Analyzing trace with hash 2085657216, now seen corresponding path program 1 times [2022-07-20 22:46:53,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:46:53,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869767203] [2022-07-20 22:46:53,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:46:53,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:46:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:46:53,578 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:46:53,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:46:53,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869767203] [2022-07-20 22:46:53,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869767203] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:46:53,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:46:53,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:46:53,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008344952] [2022-07-20 22:46:53,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:46:53,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:46:53,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:46:53,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:46:53,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:46:53,581 INFO L87 Difference]: Start difference. First operand 842 states and 1148 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:54,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:46:54,072 INFO L93 Difference]: Finished difference Result 2507 states and 3424 transitions. [2022-07-20 22:46:54,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:46:54,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 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 210 [2022-07-20 22:46:54,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:46:54,078 INFO L225 Difference]: With dead ends: 2507 [2022-07-20 22:46:54,078 INFO L226 Difference]: Without dead ends: 1667 [2022-07-20 22:46:54,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:46:54,081 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 230 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:46:54,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 49 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:46:54,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2022-07-20 22:46:54,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1658. [2022-07-20 22:46:54,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 1.3566686783343391) internal successors, (2248), 1657 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:54,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2248 transitions. [2022-07-20 22:46:54,112 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2248 transitions. Word has length 210 [2022-07-20 22:46:54,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:46:54,112 INFO L495 AbstractCegarLoop]: Abstraction has 1658 states and 2248 transitions. [2022-07-20 22:46:54,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:54,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2248 transitions. [2022-07-20 22:46:54,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-07-20 22:46:54,117 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:46:54,117 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:46:54,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 22:46:54,118 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:46:54,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:46:54,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1810228712, now seen corresponding path program 1 times [2022-07-20 22:46:54,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:46:54,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859342571] [2022-07-20 22:46:54,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:46:54,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:46:54,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:46:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:46:54,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:46:54,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859342571] [2022-07-20 22:46:54,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859342571] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:46:54,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:46:54,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:46:54,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200643609] [2022-07-20 22:46:54,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:46:54,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:46:54,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:46:54,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:46:54,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:46:54,188 INFO L87 Difference]: Start difference. First operand 1658 states and 2248 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:54,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:46:54,663 INFO L93 Difference]: Finished difference Result 4950 states and 6719 transitions. [2022-07-20 22:46:54,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:46:54,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 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 213 [2022-07-20 22:46:54,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:46:54,672 INFO L225 Difference]: With dead ends: 4950 [2022-07-20 22:46:54,672 INFO L226 Difference]: Without dead ends: 3294 [2022-07-20 22:46:54,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:46:54,674 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 203 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:46:54,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 119 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:46:54,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3294 states. [2022-07-20 22:46:54,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3294 to 3288. [2022-07-20 22:46:54,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3288 states, 3287 states have (on average 1.3416489199878308) internal successors, (4410), 3287 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:54,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3288 states to 3288 states and 4410 transitions. [2022-07-20 22:46:54,721 INFO L78 Accepts]: Start accepts. Automaton has 3288 states and 4410 transitions. Word has length 213 [2022-07-20 22:46:54,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:46:54,722 INFO L495 AbstractCegarLoop]: Abstraction has 3288 states and 4410 transitions. [2022-07-20 22:46:54,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:54,722 INFO L276 IsEmpty]: Start isEmpty. Operand 3288 states and 4410 transitions. [2022-07-20 22:46:54,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-07-20 22:46:54,727 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:46:54,727 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:46:54,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 22:46:54,728 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:46:54,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:46:54,728 INFO L85 PathProgramCache]: Analyzing trace with hash -2117214179, now seen corresponding path program 1 times [2022-07-20 22:46:54,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:46:54,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791536199] [2022-07-20 22:46:54,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:46:54,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:46:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:46:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:46:54,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:46:54,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791536199] [2022-07-20 22:46:54,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791536199] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:46:54,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:46:54,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:46:54,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501106356] [2022-07-20 22:46:54,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:46:54,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:46:54,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:46:54,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:46:54,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:46:54,792 INFO L87 Difference]: Start difference. First operand 3288 states and 4410 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:55,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:46:55,366 INFO L93 Difference]: Finished difference Result 9841 states and 13207 transitions. [2022-07-20 22:46:55,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:46:55,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 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 215 [2022-07-20 22:46:55,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:46:55,384 INFO L225 Difference]: With dead ends: 9841 [2022-07-20 22:46:55,384 INFO L226 Difference]: Without dead ends: 6555 [2022-07-20 22:46:55,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:46:55,390 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 204 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:46:55,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 98 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:46:55,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6555 states. [2022-07-20 22:46:55,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6555 to 6544. [2022-07-20 22:46:55,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6544 states, 6543 states have (on average 1.3195781751490143) internal successors, (8634), 6543 states have internal predecessors, (8634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6544 states to 6544 states and 8634 transitions. [2022-07-20 22:46:55,486 INFO L78 Accepts]: Start accepts. Automaton has 6544 states and 8634 transitions. Word has length 215 [2022-07-20 22:46:55,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:46:55,486 INFO L495 AbstractCegarLoop]: Abstraction has 6544 states and 8634 transitions. [2022-07-20 22:46:55,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:55,487 INFO L276 IsEmpty]: Start isEmpty. Operand 6544 states and 8634 transitions. [2022-07-20 22:46:55,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-07-20 22:46:55,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:46:55,499 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:46:55,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 22:46:55,499 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:46:55,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:46:55,500 INFO L85 PathProgramCache]: Analyzing trace with hash -731269670, now seen corresponding path program 1 times [2022-07-20 22:46:55,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:46:55,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518022430] [2022-07-20 22:46:55,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:46:55,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:46:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:46:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-20 22:46:55,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:46:55,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518022430] [2022-07-20 22:46:55,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518022430] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:46:55,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:46:55,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:46:55,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946146769] [2022-07-20 22:46:55,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:46:55,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:46:55,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:46:55,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:46:55,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:46:55,554 INFO L87 Difference]: Start difference. First operand 6544 states and 8634 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:56,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:46:56,114 INFO L93 Difference]: Finished difference Result 16345 states and 21517 transitions. [2022-07-20 22:46:56,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:46:56,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 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 220 [2022-07-20 22:46:56,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:46:56,140 INFO L225 Difference]: With dead ends: 16345 [2022-07-20 22:46:56,140 INFO L226 Difference]: Without dead ends: 9803 [2022-07-20 22:46:56,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:46:56,149 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 223 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:46:56,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 59 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:46:56,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9803 states. [2022-07-20 22:46:56,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9803 to 9802. [2022-07-20 22:46:56,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9802 states, 9801 states have (on average 1.3046627895112743) internal successors, (12787), 9801 states have internal predecessors, (12787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:56,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9802 states to 9802 states and 12787 transitions. [2022-07-20 22:46:56,332 INFO L78 Accepts]: Start accepts. Automaton has 9802 states and 12787 transitions. Word has length 220 [2022-07-20 22:46:56,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:46:56,332 INFO L495 AbstractCegarLoop]: Abstraction has 9802 states and 12787 transitions. [2022-07-20 22:46:56,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:56,333 INFO L276 IsEmpty]: Start isEmpty. Operand 9802 states and 12787 transitions. [2022-07-20 22:46:56,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-07-20 22:46:56,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:46:56,346 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:46:56,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 22:46:56,346 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:46:56,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:46:56,347 INFO L85 PathProgramCache]: Analyzing trace with hash -482896652, now seen corresponding path program 1 times [2022-07-20 22:46:56,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:46:56,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648063570] [2022-07-20 22:46:56,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:46:56,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:46:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:46:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 22:46:56,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:46:56,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648063570] [2022-07-20 22:46:56,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648063570] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:46:56,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:46:56,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:46:56,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876049918] [2022-07-20 22:46:56,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:46:56,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:46:56,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:46:56,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:46:56,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:46:56,407 INFO L87 Difference]: Start difference. First operand 9802 states and 12787 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:56,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:46:56,992 INFO L93 Difference]: Finished difference Result 28162 states and 36760 transitions. [2022-07-20 22:46:56,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:46:56,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 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 222 [2022-07-20 22:46:56,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:46:57,031 INFO L225 Difference]: With dead ends: 28162 [2022-07-20 22:46:57,031 INFO L226 Difference]: Without dead ends: 18362 [2022-07-20 22:46:57,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:46:57,050 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 200 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:46:57,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 112 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:46:57,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18362 states. [2022-07-20 22:46:57,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18362 to 18348. [2022-07-20 22:46:57,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18348 states, 18347 states have (on average 1.300103559164986) internal successors, (23853), 18347 states have internal predecessors, (23853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:57,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18348 states to 18348 states and 23853 transitions. [2022-07-20 22:46:57,360 INFO L78 Accepts]: Start accepts. Automaton has 18348 states and 23853 transitions. Word has length 222 [2022-07-20 22:46:57,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:46:57,360 INFO L495 AbstractCegarLoop]: Abstraction has 18348 states and 23853 transitions. [2022-07-20 22:46:57,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:57,361 INFO L276 IsEmpty]: Start isEmpty. Operand 18348 states and 23853 transitions. [2022-07-20 22:46:57,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-07-20 22:46:57,378 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:46:57,379 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:46:57,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 22:46:57,380 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:46:57,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:46:57,381 INFO L85 PathProgramCache]: Analyzing trace with hash -849827512, now seen corresponding path program 1 times [2022-07-20 22:46:57,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:46:57,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055376168] [2022-07-20 22:46:57,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:46:57,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:46:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:46:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:46:57,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:46:57,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055376168] [2022-07-20 22:46:57,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055376168] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:46:57,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:46:57,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:46:57,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697120030] [2022-07-20 22:46:57,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:46:57,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:46:57,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:46:57,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:46:57,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:46:57,505 INFO L87 Difference]: Start difference. First operand 18348 states and 23853 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:58,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:46:58,157 INFO L93 Difference]: Finished difference Result 41170 states and 53639 transitions. [2022-07-20 22:46:58,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:46:58,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 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 224 [2022-07-20 22:46:58,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:46:58,199 INFO L225 Difference]: With dead ends: 41170 [2022-07-20 22:46:58,200 INFO L226 Difference]: Without dead ends: 22824 [2022-07-20 22:46:58,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:46:58,219 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 209 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:46:58,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 325 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:46:58,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22824 states. [2022-07-20 22:46:58,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22824 to 22821. [2022-07-20 22:46:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22821 states, 22820 states have (on average 1.2670902716914987) internal successors, (28915), 22820 states have internal predecessors, (28915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:58,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22821 states to 22821 states and 28915 transitions. [2022-07-20 22:46:58,581 INFO L78 Accepts]: Start accepts. Automaton has 22821 states and 28915 transitions. Word has length 224 [2022-07-20 22:46:58,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:46:58,581 INFO L495 AbstractCegarLoop]: Abstraction has 22821 states and 28915 transitions. [2022-07-20 22:46:58,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:58,582 INFO L276 IsEmpty]: Start isEmpty. Operand 22821 states and 28915 transitions. [2022-07-20 22:46:58,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-07-20 22:46:58,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:46:58,615 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:46:58,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 22:46:58,615 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:46:58,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:46:58,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1365344075, now seen corresponding path program 1 times [2022-07-20 22:46:58,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:46:58,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042079225] [2022-07-20 22:46:58,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:46:58,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:46:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:46:58,750 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-20 22:46:58,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:46:58,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042079225] [2022-07-20 22:46:58,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042079225] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:46:58,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:46:58,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:46:58,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058178158] [2022-07-20 22:46:58,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:46:58,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:46:58,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:46:58,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:46:58,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:46:58,766 INFO L87 Difference]: Start difference. First operand 22821 states and 28915 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 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) [2022-07-20 22:46:59,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:46:59,503 INFO L93 Difference]: Finished difference Result 52760 states and 66786 transitions. [2022-07-20 22:46:59,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:46:59,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 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) Word has length 232 [2022-07-20 22:46:59,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:46:59,552 INFO L225 Difference]: With dead ends: 52760 [2022-07-20 22:46:59,553 INFO L226 Difference]: Without dead ends: 29941 [2022-07-20 22:46:59,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:46:59,576 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 199 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:46:59,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 110 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:46:59,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29941 states. [2022-07-20 22:46:59,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29941 to 29926. [2022-07-20 22:46:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29926 states, 29925 states have (on average 1.2470175438596491) internal successors, (37317), 29925 states have internal predecessors, (37317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:46:59,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29926 states to 29926 states and 37317 transitions. [2022-07-20 22:46:59,932 INFO L78 Accepts]: Start accepts. Automaton has 29926 states and 37317 transitions. Word has length 232 [2022-07-20 22:46:59,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:46:59,932 INFO L495 AbstractCegarLoop]: Abstraction has 29926 states and 37317 transitions. [2022-07-20 22:46:59,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 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) [2022-07-20 22:46:59,933 INFO L276 IsEmpty]: Start isEmpty. Operand 29926 states and 37317 transitions. [2022-07-20 22:46:59,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-07-20 22:46:59,964 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:46:59,964 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:46:59,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 22:46:59,965 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:46:59,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:46:59,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1298577142, now seen corresponding path program 1 times [2022-07-20 22:46:59,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:46:59,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581362970] [2022-07-20 22:46:59,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:46:59,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:46:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:00,043 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-20 22:47:00,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:00,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581362970] [2022-07-20 22:47:00,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581362970] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:47:00,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659816585] [2022-07-20 22:47:00,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:00,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:00,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:00,060 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) [2022-07-20 22:47:00,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 22:47:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:00,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:47:00,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:47:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-20 22:47:00,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:47:00,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659816585] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:00,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:47:00,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-20 22:47:00,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442624197] [2022-07-20 22:47:00,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:00,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:00,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:00,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:00,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:00,333 INFO L87 Difference]: Start difference. First operand 29926 states and 37317 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:01,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:01,212 INFO L93 Difference]: Finished difference Result 78565 states and 98208 transitions. [2022-07-20 22:47:01,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:01,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 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 239 [2022-07-20 22:47:01,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:01,281 INFO L225 Difference]: With dead ends: 78565 [2022-07-20 22:47:01,281 INFO L226 Difference]: Without dead ends: 48844 [2022-07-20 22:47:01,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:01,315 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 223 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:01,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 86 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:47:01,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48844 states. [2022-07-20 22:47:01,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48844 to 48840. [2022-07-20 22:47:01,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48840 states, 48839 states have (on average 1.2334609635741927) internal successors, (60241), 48839 states have internal predecessors, (60241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:02,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48840 states to 48840 states and 60241 transitions. [2022-07-20 22:47:02,086 INFO L78 Accepts]: Start accepts. Automaton has 48840 states and 60241 transitions. Word has length 239 [2022-07-20 22:47:02,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:02,086 INFO L495 AbstractCegarLoop]: Abstraction has 48840 states and 60241 transitions. [2022-07-20 22:47:02,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:02,086 INFO L276 IsEmpty]: Start isEmpty. Operand 48840 states and 60241 transitions. [2022-07-20 22:47:02,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-07-20 22:47:02,114 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:02,114 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:02,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 22:47:02,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-20 22:47:02,316 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:02,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:02,317 INFO L85 PathProgramCache]: Analyzing trace with hash 442940795, now seen corresponding path program 1 times [2022-07-20 22:47:02,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:02,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964745298] [2022-07-20 22:47:02,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:02,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 22:47:02,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:02,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964745298] [2022-07-20 22:47:02,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964745298] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:47:02,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339755464] [2022-07-20 22:47:02,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:02,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:02,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:02,402 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) [2022-07-20 22:47:02,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 22:47:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:02,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:47:02,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:47:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 22:47:02,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:47:02,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339755464] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:02,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:47:02,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-20 22:47:02,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970930129] [2022-07-20 22:47:02,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:02,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:02,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:02,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:02,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:02,595 INFO L87 Difference]: Start difference. First operand 48840 states and 60241 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:03,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:03,457 INFO L93 Difference]: Finished difference Result 109452 states and 135865 transitions. [2022-07-20 22:47:03,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:03,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 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 241 [2022-07-20 22:47:03,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:03,540 INFO L225 Difference]: With dead ends: 109452 [2022-07-20 22:47:03,541 INFO L226 Difference]: Without dead ends: 60817 [2022-07-20 22:47:03,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:03,573 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 203 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:03,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 113 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:47:03,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60817 states. [2022-07-20 22:47:04,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60817 to 60407. [2022-07-20 22:47:04,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60407 states, 60406 states have (on average 1.1477998874284012) internal successors, (69334), 60406 states have internal predecessors, (69334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:04,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60407 states to 60407 states and 69334 transitions. [2022-07-20 22:47:04,640 INFO L78 Accepts]: Start accepts. Automaton has 60407 states and 69334 transitions. Word has length 241 [2022-07-20 22:47:04,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:04,640 INFO L495 AbstractCegarLoop]: Abstraction has 60407 states and 69334 transitions. [2022-07-20 22:47:04,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:04,641 INFO L276 IsEmpty]: Start isEmpty. Operand 60407 states and 69334 transitions. [2022-07-20 22:47:04,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-07-20 22:47:04,664 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:04,664 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:04,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 22:47:04,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-20 22:47:04,875 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:04,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:04,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1785964666, now seen corresponding path program 1 times [2022-07-20 22:47:04,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:04,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842896164] [2022-07-20 22:47:04,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:04,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:04,958 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 22:47:04,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:04,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842896164] [2022-07-20 22:47:04,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842896164] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:04,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:04,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:47:04,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72512980] [2022-07-20 22:47:04,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:04,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:04,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:04,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:04,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:04,961 INFO L87 Difference]: Start difference. First operand 60407 states and 69334 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:05,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:05,981 INFO L93 Difference]: Finished difference Result 151120 states and 173402 transitions. [2022-07-20 22:47:05,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:05,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 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 249 [2022-07-20 22:47:05,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:06,102 INFO L225 Difference]: With dead ends: 151120 [2022-07-20 22:47:06,103 INFO L226 Difference]: Without dead ends: 91324 [2022-07-20 22:47:06,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:06,143 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 217 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:06,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 126 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:47:06,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91324 states. [2022-07-20 22:47:07,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91324 to 91317. [2022-07-20 22:47:07,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91317 states, 91316 states have (on average 1.1436988041526128) internal successors, (104438), 91316 states have internal predecessors, (104438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:07,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91317 states to 91317 states and 104438 transitions. [2022-07-20 22:47:07,344 INFO L78 Accepts]: Start accepts. Automaton has 91317 states and 104438 transitions. Word has length 249 [2022-07-20 22:47:07,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:07,345 INFO L495 AbstractCegarLoop]: Abstraction has 91317 states and 104438 transitions. [2022-07-20 22:47:07,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:07,345 INFO L276 IsEmpty]: Start isEmpty. Operand 91317 states and 104438 transitions. [2022-07-20 22:47:07,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-07-20 22:47:07,382 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:07,382 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:07,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 22:47:07,383 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:07,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:07,383 INFO L85 PathProgramCache]: Analyzing trace with hash -669456393, now seen corresponding path program 1 times [2022-07-20 22:47:07,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:07,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597954719] [2022-07-20 22:47:07,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:07,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:47:07,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:07,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597954719] [2022-07-20 22:47:07,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597954719] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:07,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:07,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:47:07,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395638485] [2022-07-20 22:47:07,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:07,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:07,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:07,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:07,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:07,502 INFO L87 Difference]: Start difference. First operand 91317 states and 104438 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 2 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:08,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:08,566 INFO L93 Difference]: Finished difference Result 181619 states and 207792 transitions. [2022-07-20 22:47:08,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:08,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 2 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 261 [2022-07-20 22:47:08,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:08,703 INFO L225 Difference]: With dead ends: 181619 [2022-07-20 22:47:08,703 INFO L226 Difference]: Without dead ends: 91522 [2022-07-20 22:47:08,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:08,765 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 133 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:08,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 128 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:47:09,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91522 states. [2022-07-20 22:47:09,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91522 to 91520. [2022-07-20 22:47:09,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91520 states, 91519 states have (on average 1.143434696620374) internal successors, (104646), 91519 states have internal predecessors, (104646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:10,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91520 states to 91520 states and 104646 transitions. [2022-07-20 22:47:10,137 INFO L78 Accepts]: Start accepts. Automaton has 91520 states and 104646 transitions. Word has length 261 [2022-07-20 22:47:10,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:10,143 INFO L495 AbstractCegarLoop]: Abstraction has 91520 states and 104646 transitions. [2022-07-20 22:47:10,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 2 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:10,148 INFO L276 IsEmpty]: Start isEmpty. Operand 91520 states and 104646 transitions. [2022-07-20 22:47:10,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-07-20 22:47:10,192 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:10,192 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:10,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 22:47:10,193 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:10,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:10,193 INFO L85 PathProgramCache]: Analyzing trace with hash 2089670850, now seen corresponding path program 1 times [2022-07-20 22:47:10,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:10,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201571962] [2022-07-20 22:47:10,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:10,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:47:10,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:10,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201571962] [2022-07-20 22:47:10,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201571962] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:10,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:10,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:47:10,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477293287] [2022-07-20 22:47:10,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:10,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:47:10,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:10,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:47:10,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:47:10,310 INFO L87 Difference]: Start difference. First operand 91520 states and 104646 transitions. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:11,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:11,564 INFO L93 Difference]: Finished difference Result 161506 states and 185075 transitions. [2022-07-20 22:47:11,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:47:11,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 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 289 [2022-07-20 22:47:11,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:11,933 INFO L225 Difference]: With dead ends: 161506 [2022-07-20 22:47:11,934 INFO L226 Difference]: Without dead ends: 101710 [2022-07-20 22:47:11,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:47:11,966 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 352 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:11,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 86 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 22:47:12,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101710 states. [2022-07-20 22:47:12,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101710 to 101691. [2022-07-20 22:47:12,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101691 states, 101690 states have (on average 1.1378404956239552) internal successors, (115707), 101690 states have internal predecessors, (115707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:13,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101691 states to 101691 states and 115707 transitions. [2022-07-20 22:47:13,131 INFO L78 Accepts]: Start accepts. Automaton has 101691 states and 115707 transitions. Word has length 289 [2022-07-20 22:47:13,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:13,131 INFO L495 AbstractCegarLoop]: Abstraction has 101691 states and 115707 transitions. [2022-07-20 22:47:13,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:13,131 INFO L276 IsEmpty]: Start isEmpty. Operand 101691 states and 115707 transitions. [2022-07-20 22:47:13,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-07-20 22:47:13,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:13,171 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:13,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 22:47:13,171 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:13,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:13,172 INFO L85 PathProgramCache]: Analyzing trace with hash -836598297, now seen corresponding path program 1 times [2022-07-20 22:47:13,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:13,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902966438] [2022-07-20 22:47:13,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:13,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 81 proven. 6 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-20 22:47:13,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:13,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902966438] [2022-07-20 22:47:13,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902966438] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:47:13,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134108245] [2022-07-20 22:47:13,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:13,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:13,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:13,574 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) [2022-07-20 22:47:13,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 22:47:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:13,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:47:13,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:47:13,908 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-20 22:47:13,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:47:13,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134108245] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:13,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:47:13,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-20 22:47:13,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058789849] [2022-07-20 22:47:13,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:13,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:13,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:13,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:13,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:13,910 INFO L87 Difference]: Start difference. First operand 101691 states and 115707 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:15,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:15,038 INFO L93 Difference]: Finished difference Result 201559 states and 229457 transitions. [2022-07-20 22:47:15,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:15,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 304 [2022-07-20 22:47:15,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:15,181 INFO L225 Difference]: With dead ends: 201559 [2022-07-20 22:47:15,181 INFO L226 Difference]: Without dead ends: 101291 [2022-07-20 22:47:15,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:15,205 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 73 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:15,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 277 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:47:15,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101291 states. [2022-07-20 22:47:16,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101291 to 100879. [2022-07-20 22:47:16,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100879 states, 100878 states have (on average 1.1298102658656992) internal successors, (113973), 100878 states have internal predecessors, (113973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:16,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100879 states to 100879 states and 113973 transitions. [2022-07-20 22:47:16,500 INFO L78 Accepts]: Start accepts. Automaton has 100879 states and 113973 transitions. Word has length 304 [2022-07-20 22:47:16,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:16,502 INFO L495 AbstractCegarLoop]: Abstraction has 100879 states and 113973 transitions. [2022-07-20 22:47:16,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:16,503 INFO L276 IsEmpty]: Start isEmpty. Operand 100879 states and 113973 transitions. [2022-07-20 22:47:16,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-07-20 22:47:16,545 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:16,545 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:16,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 22:47:16,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:16,760 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:16,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:16,760 INFO L85 PathProgramCache]: Analyzing trace with hash 17442066, now seen corresponding path program 1 times [2022-07-20 22:47:16,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:16,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956292122] [2022-07-20 22:47:16,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:16,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:16,858 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 106 proven. 6 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-20 22:47:16,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:16,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956292122] [2022-07-20 22:47:16,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956292122] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:47:16,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338306759] [2022-07-20 22:47:16,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:16,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:16,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:16,864 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:47:16,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 22:47:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:17,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:47:17,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:47:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-20 22:47:17,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:47:17,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338306759] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:17,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:47:17,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-20 22:47:17,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479896031] [2022-07-20 22:47:17,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:17,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:17,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:17,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:17,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:17,158 INFO L87 Difference]: Start difference. First operand 100879 states and 113973 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:18,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:18,263 INFO L93 Difference]: Finished difference Result 186078 states and 209865 transitions. [2022-07-20 22:47:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:18,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 323 [2022-07-20 22:47:18,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:18,419 INFO L225 Difference]: With dead ends: 186078 [2022-07-20 22:47:18,419 INFO L226 Difference]: Without dead ends: 118547 [2022-07-20 22:47:18,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:18,480 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 81 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:18,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 56 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 22:47:18,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118547 states. [2022-07-20 22:47:19,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118547 to 117525. [2022-07-20 22:47:20,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117525 states, 117524 states have (on average 1.1249872366495355) internal successors, (132213), 117524 states have internal predecessors, (132213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:20,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117525 states to 117525 states and 132213 transitions. [2022-07-20 22:47:20,224 INFO L78 Accepts]: Start accepts. Automaton has 117525 states and 132213 transitions. Word has length 323 [2022-07-20 22:47:20,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:20,224 INFO L495 AbstractCegarLoop]: Abstraction has 117525 states and 132213 transitions. [2022-07-20 22:47:20,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:20,225 INFO L276 IsEmpty]: Start isEmpty. Operand 117525 states and 132213 transitions. [2022-07-20 22:47:20,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-07-20 22:47:20,275 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:20,275 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:20,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 22:47:20,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-20 22:47:20,477 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:20,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:20,487 INFO L85 PathProgramCache]: Analyzing trace with hash 625486579, now seen corresponding path program 1 times [2022-07-20 22:47:20,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:20,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759397221] [2022-07-20 22:47:20,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:20,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 144 proven. 6 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-07-20 22:47:20,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:20,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759397221] [2022-07-20 22:47:20,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759397221] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:47:20,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423490376] [2022-07-20 22:47:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:20,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:20,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:20,586 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) [2022-07-20 22:47:20,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 22:47:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:20,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 22:47:20,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:47:20,786 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-20 22:47:20,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:47:20,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423490376] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:20,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:47:20,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-20 22:47:20,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127755273] [2022-07-20 22:47:20,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:20,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:20,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:20,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:20,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:20,790 INFO L87 Difference]: Start difference. First operand 117525 states and 132213 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:22,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:22,074 INFO L93 Difference]: Finished difference Result 208411 states and 233314 transitions. [2022-07-20 22:47:22,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:22,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 324 [2022-07-20 22:47:22,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:22,208 INFO L225 Difference]: With dead ends: 208411 [2022-07-20 22:47:22,208 INFO L226 Difference]: Without dead ends: 92106 [2022-07-20 22:47:22,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:22,262 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 211 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:22,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 288 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:47:22,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92106 states. [2022-07-20 22:47:23,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92106 to 83573. [2022-07-20 22:47:23,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83573 states, 83572 states have (on average 1.0924591968601924) internal successors, (91299), 83572 states have internal predecessors, (91299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83573 states to 83573 states and 91299 transitions. [2022-07-20 22:47:23,413 INFO L78 Accepts]: Start accepts. Automaton has 83573 states and 91299 transitions. Word has length 324 [2022-07-20 22:47:23,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:23,413 INFO L495 AbstractCegarLoop]: Abstraction has 83573 states and 91299 transitions. [2022-07-20 22:47:23,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:23,413 INFO L276 IsEmpty]: Start isEmpty. Operand 83573 states and 91299 transitions. [2022-07-20 22:47:23,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-07-20 22:47:23,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:23,453 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:23,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-20 22:47:23,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-20 22:47:23,668 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:23,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:23,668 INFO L85 PathProgramCache]: Analyzing trace with hash 854175643, now seen corresponding path program 1 times [2022-07-20 22:47:23,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:23,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012822927] [2022-07-20 22:47:23,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:23,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 145 proven. 6 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-20 22:47:23,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:23,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012822927] [2022-07-20 22:47:23,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012822927] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:47:23,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692829563] [2022-07-20 22:47:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:23,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:23,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:23,757 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) [2022-07-20 22:47:23,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 22:47:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:23,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 22:47:23,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:47:23,940 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 273 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-20 22:47:23,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:47:23,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692829563] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:23,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:47:23,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-20 22:47:23,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106765856] [2022-07-20 22:47:23,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:23,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:23,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:23,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:23,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:23,944 INFO L87 Difference]: Start difference. First operand 83573 states and 91299 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:24,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:24,995 INFO L93 Difference]: Finished difference Result 174069 states and 190574 transitions. [2022-07-20 22:47:24,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:24,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 328 [2022-07-20 22:47:24,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:25,120 INFO L225 Difference]: With dead ends: 174069 [2022-07-20 22:47:25,120 INFO L226 Difference]: Without dead ends: 91919 [2022-07-20 22:47:25,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:25,180 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 200 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:25,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 311 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 22:47:25,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91919 states. [2022-07-20 22:47:26,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91919 to 90692. [2022-07-20 22:47:26,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90692 states, 90691 states have (on average 1.0924457774200307) internal successors, (99075), 90691 states have internal predecessors, (99075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:26,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90692 states to 90692 states and 99075 transitions. [2022-07-20 22:47:26,557 INFO L78 Accepts]: Start accepts. Automaton has 90692 states and 99075 transitions. Word has length 328 [2022-07-20 22:47:26,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:26,557 INFO L495 AbstractCegarLoop]: Abstraction has 90692 states and 99075 transitions. [2022-07-20 22:47:26,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:26,557 INFO L276 IsEmpty]: Start isEmpty. Operand 90692 states and 99075 transitions. [2022-07-20 22:47:26,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-07-20 22:47:26,608 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:26,609 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:26,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 22:47:26,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:26,811 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:26,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:26,811 INFO L85 PathProgramCache]: Analyzing trace with hash 19103636, now seen corresponding path program 1 times [2022-07-20 22:47:26,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:26,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240035210] [2022-07-20 22:47:26,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:26,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:26,923 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-20 22:47:26,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:26,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240035210] [2022-07-20 22:47:26,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240035210] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:47:26,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804051579] [2022-07-20 22:47:26,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:26,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:26,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:26,926 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) [2022-07-20 22:47:26,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 22:47:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:27,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:47:27,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:47:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-20 22:47:27,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:47:27,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804051579] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:27,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:47:27,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-20 22:47:27,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277489855] [2022-07-20 22:47:27,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:27,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:27,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:27,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:27,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:27,589 INFO L87 Difference]: Start difference. First operand 90692 states and 99075 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:28,443 INFO L93 Difference]: Finished difference Result 174909 states and 191130 transitions. [2022-07-20 22:47:28,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:28,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 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 328 [2022-07-20 22:47:28,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:28,556 INFO L225 Difference]: With dead ends: 174909 [2022-07-20 22:47:28,557 INFO L226 Difference]: Without dead ends: 84828 [2022-07-20 22:47:28,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:28,621 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 36 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:28,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 325 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:47:28,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84828 states. [2022-07-20 22:47:29,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84828 to 84805. [2022-07-20 22:47:29,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84805 states, 84804 states have (on average 1.0876255836988822) internal successors, (92235), 84804 states have internal predecessors, (92235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84805 states to 84805 states and 92235 transitions. [2022-07-20 22:47:29,836 INFO L78 Accepts]: Start accepts. Automaton has 84805 states and 92235 transitions. Word has length 328 [2022-07-20 22:47:29,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:29,837 INFO L495 AbstractCegarLoop]: Abstraction has 84805 states and 92235 transitions. [2022-07-20 22:47:29,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:29,837 INFO L276 IsEmpty]: Start isEmpty. Operand 84805 states and 92235 transitions. [2022-07-20 22:47:29,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-07-20 22:47:29,879 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:29,879 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:29,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 22:47:30,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:30,083 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:30,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:30,084 INFO L85 PathProgramCache]: Analyzing trace with hash -114782023, now seen corresponding path program 1 times [2022-07-20 22:47:30,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:30,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450703376] [2022-07-20 22:47:30,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:30,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:30,182 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 233 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-20 22:47:30,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:30,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450703376] [2022-07-20 22:47:30,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450703376] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:30,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:30,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:47:30,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585631944] [2022-07-20 22:47:30,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:30,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:47:30,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:30,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:47:30,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:47:30,184 INFO L87 Difference]: Start difference. First operand 84805 states and 92235 transitions. Second operand has 4 states, 4 states have (on average 68.5) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:31,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:31,576 INFO L93 Difference]: Finished difference Result 169844 states and 184913 transitions. [2022-07-20 22:47:31,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:47:31,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.5) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 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 334 [2022-07-20 22:47:31,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:31,678 INFO L225 Difference]: With dead ends: 169844 [2022-07-20 22:47:31,678 INFO L226 Difference]: Without dead ends: 81184 [2022-07-20 22:47:31,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:47:31,733 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 382 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:31,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 86 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-20 22:47:31,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81184 states. [2022-07-20 22:47:32,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81184 to 66122. [2022-07-20 22:47:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66122 states, 66121 states have (on average 1.084027767275147) internal successors, (71677), 66121 states have internal predecessors, (71677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:32,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66122 states to 66122 states and 71677 transitions. [2022-07-20 22:47:32,815 INFO L78 Accepts]: Start accepts. Automaton has 66122 states and 71677 transitions. Word has length 334 [2022-07-20 22:47:32,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:32,816 INFO L495 AbstractCegarLoop]: Abstraction has 66122 states and 71677 transitions. [2022-07-20 22:47:32,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.5) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:32,816 INFO L276 IsEmpty]: Start isEmpty. Operand 66122 states and 71677 transitions. [2022-07-20 22:47:32,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2022-07-20 22:47:32,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:32,854 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:32,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-20 22:47:32,854 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:32,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:32,855 INFO L85 PathProgramCache]: Analyzing trace with hash 683726884, now seen corresponding path program 1 times [2022-07-20 22:47:32,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:32,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589611850] [2022-07-20 22:47:32,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:32,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:32,948 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 145 proven. 6 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-07-20 22:47:32,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:32,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589611850] [2022-07-20 22:47:32,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589611850] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:47:32,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602639791] [2022-07-20 22:47:32,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:32,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:32,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:32,951 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) [2022-07-20 22:47:32,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 22:47:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:33,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 22:47:33,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:47:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-07-20 22:47:33,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:47:33,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602639791] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:33,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:47:33,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-20 22:47:33,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379052181] [2022-07-20 22:47:33,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:33,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:33,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:33,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:33,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:33,366 INFO L87 Difference]: Start difference. First operand 66122 states and 71677 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:34,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:34,361 INFO L93 Difference]: Finished difference Result 107620 states and 116504 transitions. [2022-07-20 22:47:34,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:34,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 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 341 [2022-07-20 22:47:34,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:34,414 INFO L225 Difference]: With dead ends: 107620 [2022-07-20 22:47:34,414 INFO L226 Difference]: Without dead ends: 45769 [2022-07-20 22:47:34,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:34,430 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 51 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:34,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 300 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:47:34,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45769 states. [2022-07-20 22:47:34,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45769 to 43940. [2022-07-20 22:47:34,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43940 states, 43939 states have (on average 1.0712806390677985) internal successors, (47071), 43939 states have internal predecessors, (47071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:34,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43940 states to 43940 states and 47071 transitions. [2022-07-20 22:47:34,916 INFO L78 Accepts]: Start accepts. Automaton has 43940 states and 47071 transitions. Word has length 341 [2022-07-20 22:47:34,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:34,916 INFO L495 AbstractCegarLoop]: Abstraction has 43940 states and 47071 transitions. [2022-07-20 22:47:34,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:34,916 INFO L276 IsEmpty]: Start isEmpty. Operand 43940 states and 47071 transitions. [2022-07-20 22:47:34,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-07-20 22:47:34,947 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:34,947 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:34,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-20 22:47:35,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-20 22:47:35,150 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:35,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:35,150 INFO L85 PathProgramCache]: Analyzing trace with hash -358666265, now seen corresponding path program 1 times [2022-07-20 22:47:35,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:35,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404888717] [2022-07-20 22:47:35,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:35,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-07-20 22:47:35,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:35,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404888717] [2022-07-20 22:47:35,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404888717] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:47:35,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122647778] [2022-07-20 22:47:35,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:35,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:35,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:35,243 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) [2022-07-20 22:47:35,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 22:47:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:35,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 22:47:35,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:47:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 211 proven. 37 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 22:47:35,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:47:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 211 proven. 37 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 22:47:35,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122647778] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:47:35,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:47:35,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-07-20 22:47:35,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178811221] [2022-07-20 22:47:35,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:47:35,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:47:35,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:35,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:47:35,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:47:35,671 INFO L87 Difference]: Start difference. First operand 43940 states and 47071 transitions. Second operand has 6 states, 6 states have (on average 61.5) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:37,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:37,716 INFO L93 Difference]: Finished difference Result 125958 states and 135243 transitions. [2022-07-20 22:47:37,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 22:47:37,717 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 61.5) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 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 363 [2022-07-20 22:47:37,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:37,823 INFO L225 Difference]: With dead ends: 125958 [2022-07-20 22:47:37,823 INFO L226 Difference]: Without dead ends: 85883 [2022-07-20 22:47:37,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 723 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:47:37,865 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 1733 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1998 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1733 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 1998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:37,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1733 Valid, 146 Invalid, 2454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 1998 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-20 22:47:37,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85883 states. [2022-07-20 22:47:38,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85883 to 67961. [2022-07-20 22:47:38,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67961 states, 67960 states have (on average 1.0697763390229547) internal successors, (72702), 67960 states have internal predecessors, (72702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:38,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67961 states to 67961 states and 72702 transitions. [2022-07-20 22:47:38,906 INFO L78 Accepts]: Start accepts. Automaton has 67961 states and 72702 transitions. Word has length 363 [2022-07-20 22:47:38,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:38,906 INFO L495 AbstractCegarLoop]: Abstraction has 67961 states and 72702 transitions. [2022-07-20 22:47:38,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 61.5) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:38,907 INFO L276 IsEmpty]: Start isEmpty. Operand 67961 states and 72702 transitions. [2022-07-20 22:47:38,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2022-07-20 22:47:38,927 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:38,928 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:38,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 22:47:39,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:39,129 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:39,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:39,129 INFO L85 PathProgramCache]: Analyzing trace with hash -197989756, now seen corresponding path program 1 times [2022-07-20 22:47:39,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:39,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612186495] [2022-07-20 22:47:39,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:39,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:39,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:39,245 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-20 22:47:39,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:39,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612186495] [2022-07-20 22:47:39,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612186495] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:39,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:39,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:47:39,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071533151] [2022-07-20 22:47:39,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:39,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:39,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:39,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:39,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:39,248 INFO L87 Difference]: Start difference. First operand 67961 states and 72702 transitions. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 2 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:40,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:40,264 INFO L93 Difference]: Finished difference Result 142650 states and 152632 transitions. [2022-07-20 22:47:40,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:40,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 2 states have internal predecessors, (318), 0 states have call successors, (0), 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 378 [2022-07-20 22:47:40,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:40,365 INFO L225 Difference]: With dead ends: 142650 [2022-07-20 22:47:40,365 INFO L226 Difference]: Without dead ends: 75300 [2022-07-20 22:47:40,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:40,398 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 105 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:40,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 86 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:47:40,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75300 states. [2022-07-20 22:47:41,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75300 to 74278. [2022-07-20 22:47:41,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74278 states, 74277 states have (on average 1.0687426794297024) internal successors, (79383), 74277 states have internal predecessors, (79383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:41,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74278 states to 74278 states and 79383 transitions. [2022-07-20 22:47:41,677 INFO L78 Accepts]: Start accepts. Automaton has 74278 states and 79383 transitions. Word has length 378 [2022-07-20 22:47:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:41,677 INFO L495 AbstractCegarLoop]: Abstraction has 74278 states and 79383 transitions. [2022-07-20 22:47:41,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 2 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:41,677 INFO L276 IsEmpty]: Start isEmpty. Operand 74278 states and 79383 transitions. [2022-07-20 22:47:41,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2022-07-20 22:47:41,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:41,709 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:41,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-20 22:47:41,709 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:41,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:41,710 INFO L85 PathProgramCache]: Analyzing trace with hash 706368500, now seen corresponding path program 1 times [2022-07-20 22:47:41,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:41,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385423728] [2022-07-20 22:47:41,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:41,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 212 proven. 6 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-20 22:47:41,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:41,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385423728] [2022-07-20 22:47:41,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385423728] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:47:41,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128284099] [2022-07-20 22:47:41,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:41,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:41,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:41,828 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) [2022-07-20 22:47:41,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 22:47:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:41,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:47:42,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:47:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-07-20 22:47:42,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:47:42,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128284099] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:42,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:47:42,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-20 22:47:42,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305188508] [2022-07-20 22:47:42,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:42,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:42,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:42,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:42,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:42,124 INFO L87 Difference]: Start difference. First operand 74278 states and 79383 transitions. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:42,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:42,716 INFO L93 Difference]: Finished difference Result 192302 states and 205397 transitions. [2022-07-20 22:47:42,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:42,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 0 states have call successors, (0), 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 385 [2022-07-20 22:47:42,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:42,851 INFO L225 Difference]: With dead ends: 192302 [2022-07-20 22:47:42,851 INFO L226 Difference]: Without dead ends: 119043 [2022-07-20 22:47:42,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:42,906 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 181 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:42,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 479 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:47:43,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119043 states. [2022-07-20 22:47:44,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119043 to 117199. [2022-07-20 22:47:44,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117199 states, 117198 states have (on average 1.0668782743732828) internal successors, (125036), 117198 states have internal predecessors, (125036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:44,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117199 states to 117199 states and 125036 transitions. [2022-07-20 22:47:44,640 INFO L78 Accepts]: Start accepts. Automaton has 117199 states and 125036 transitions. Word has length 385 [2022-07-20 22:47:44,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:44,640 INFO L495 AbstractCegarLoop]: Abstraction has 117199 states and 125036 transitions. [2022-07-20 22:47:44,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:44,641 INFO L276 IsEmpty]: Start isEmpty. Operand 117199 states and 125036 transitions. [2022-07-20 22:47:44,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2022-07-20 22:47:44,662 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:44,663 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:44,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 22:47:44,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-20 22:47:44,864 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:44,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:44,864 INFO L85 PathProgramCache]: Analyzing trace with hash -242842336, now seen corresponding path program 1 times [2022-07-20 22:47:44,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:44,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477884708] [2022-07-20 22:47:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:44,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:44,979 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 251 proven. 9 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-20 22:47:44,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:44,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477884708] [2022-07-20 22:47:44,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477884708] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:47:44,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045869021] [2022-07-20 22:47:44,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:44,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:44,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:44,982 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) [2022-07-20 22:47:44,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 22:47:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:45,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 22:47:45,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:47:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-07-20 22:47:45,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:47:45,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045869021] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:45,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:47:45,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-20 22:47:45,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644622824] [2022-07-20 22:47:45,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:45,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:45,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:45,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:45,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:47:45,185 INFO L87 Difference]: Start difference. First operand 117199 states and 125036 transitions. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)