./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.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 9e29b1c17273501647988c2dcf7c62baca572c01c9f2bd474ce3ab9b8d1b7b68 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 12:18:53,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 12:18:53,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 12:18:54,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 12:18:54,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 12:18:54,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 12:18:54,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 12:18:54,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 12:18:54,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 12:18:54,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 12:18:54,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 12:18:54,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 12:18:54,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 12:18:54,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 12:18:54,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 12:18:54,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 12:18:54,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 12:18:54,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 12:18:54,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 12:18:54,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 12:18:54,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 12:18:54,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 12:18:54,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 12:18:54,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 12:18:54,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 12:18:54,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 12:18:54,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 12:18:54,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 12:18:54,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 12:18:54,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 12:18:54,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 12:18:54,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 12:18:54,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 12:18:54,075 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 12:18:54,076 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 12:18:54,076 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 12:18:54,076 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 12:18:54,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 12:18:54,077 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 12:18:54,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 12:18:54,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 12:18:54,079 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 12:18:54,101 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 12:18:54,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 12:18:54,102 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 12:18:54,102 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 12:18:54,103 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 12:18:54,103 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 12:18:54,103 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 12:18:54,103 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 12:18:54,104 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 12:18:54,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 12:18:54,104 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 12:18:54,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 12:18:54,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 12:18:54,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 12:18:54,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 12:18:54,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 12:18:54,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 12:18:54,105 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 12:18:54,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 12:18:54,105 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 12:18:54,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 12:18:54,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 12:18:54,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 12:18:54,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 12:18:54,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:18:54,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 12:18:54,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 12:18:54,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 12:18:54,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 12:18:54,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 12:18:54,109 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 12:18:54,109 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 12:18:54,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 12:18:54,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 12:18:54,109 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e29b1c17273501647988c2dcf7c62baca572c01c9f2bd474ce3ab9b8d1b7b68 [2021-12-22 12:18:54,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 12:18:54,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 12:18:54,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 12:18:54,327 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 12:18:54,327 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 12:18:54,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-22 12:18:54,368 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d5b59365/444afdad757145bea7eeb26d1f0cf4ee/FLAGf356e2117 [2021-12-22 12:18:54,753 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 12:18:54,754 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-22 12:18:54,763 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d5b59365/444afdad757145bea7eeb26d1f0cf4ee/FLAGf356e2117 [2021-12-22 12:18:55,150 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d5b59365/444afdad757145bea7eeb26d1f0cf4ee [2021-12-22 12:18:55,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 12:18:55,154 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 12:18:55,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 12:18:55,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 12:18:55,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 12:18:55,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:18:55" (1/1) ... [2021-12-22 12:18:55,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@565606c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:18:55, skipping insertion in model container [2021-12-22 12:18:55,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:18:55" (1/1) ... [2021-12-22 12:18:55,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 12:18:55,210 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 12:18:55,457 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/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13867,13880] [2021-12-22 12:18:55,517 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:18:55,526 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 12:18:55,568 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/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13867,13880] [2021-12-22 12:18:55,594 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:18:55,606 INFO L208 MainTranslator]: Completed translation [2021-12-22 12:18:55,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:18:55 WrapperNode [2021-12-22 12:18:55,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 12:18:55,607 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 12:18:55,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 12:18:55,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 12:18:55,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:18:55" (1/1) ... [2021-12-22 12:18:55,623 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:18:55" (1/1) ... [2021-12-22 12:18:55,657 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1373 [2021-12-22 12:18:55,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 12:18:55,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 12:18:55,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 12:18:55,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 12:18:55,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:18:55" (1/1) ... [2021-12-22 12:18:55,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:18:55" (1/1) ... [2021-12-22 12:18:55,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:18:55" (1/1) ... [2021-12-22 12:18:55,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:18:55" (1/1) ... [2021-12-22 12:18:55,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:18:55" (1/1) ... [2021-12-22 12:18:55,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:18:55" (1/1) ... [2021-12-22 12:18:55,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:18:55" (1/1) ... [2021-12-22 12:18:55,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 12:18:55,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 12:18:55,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 12:18:55,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 12:18:55,724 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:18:55" (1/1) ... [2021-12-22 12:18:55,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:18:55,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:18:55,759 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 12:18:55,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 12:18:55,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 12:18:55,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 12:18:55,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 12:18:55,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 12:18:55,928 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 12:18:55,929 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 12:18:56,552 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 12:18:56,563 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 12:18:56,564 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 12:18:56,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:18:56 BoogieIcfgContainer [2021-12-22 12:18:56,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 12:18:56,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 12:18:56,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 12:18:56,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 12:18:56,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:18:55" (1/3) ... [2021-12-22 12:18:56,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@187a8c3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:18:56, skipping insertion in model container [2021-12-22 12:18:56,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:18:55" (2/3) ... [2021-12-22 12:18:56,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@187a8c3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:18:56, skipping insertion in model container [2021-12-22 12:18:56,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:18:56" (3/3) ... [2021-12-22 12:18:56,573 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-22 12:18:56,580 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 12:18:56,580 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 12:18:56,611 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 12:18:56,616 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 12:18:56,617 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 12:18:56,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 351 states, 349 states have (on average 1.7879656160458453) internal successors, (624), 350 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:18:56,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-22 12:18:56,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:18:56,645 INFO L514 BasicCegarLoop]: 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] [2021-12-22 12:18:56,646 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:18:56,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:18:56,649 INFO L85 PathProgramCache]: Analyzing trace with hash -799681112, now seen corresponding path program 1 times [2021-12-22 12:18:56,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:18:56,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563794383] [2021-12-22 12:18:56,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:18:56,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:18:56,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:18:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:18:57,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:18:57,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563794383] [2021-12-22 12:18:57,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563794383] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:18:57,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:18:57,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:18:57,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638458429] [2021-12-22 12:18:57,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:18:57,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:18:57,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:18:57,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:18:57,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:18:57,025 INFO L87 Difference]: Start difference. First operand has 351 states, 349 states have (on average 1.7879656160458453) internal successors, (624), 350 states have internal predecessors, (624), 0 states have call successors, (0), 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 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:18:57,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:18:57,103 INFO L93 Difference]: Finished difference Result 655 states and 1130 transitions. [2021-12-22 12:18:57,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:18:57,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 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 118 [2021-12-22 12:18:57,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:18:57,116 INFO L225 Difference]: With dead ends: 655 [2021-12-22 12:18:57,116 INFO L226 Difference]: Without dead ends: 491 [2021-12-22 12:18:57,119 INFO L932 BasicCegarLoop]: 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 [2021-12-22 12:18:57,122 INFO L933 BasicCegarLoop]: 618 mSDtfsCounter, 268 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:18:57,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 1150 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:18:57,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-12-22 12:18:57,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 488. [2021-12-22 12:18:57,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 1.6529774127310062) internal successors, (805), 487 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:18:57,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 805 transitions. [2021-12-22 12:18:57,179 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 805 transitions. Word has length 118 [2021-12-22 12:18:57,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:18:57,180 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 805 transitions. [2021-12-22 12:18:57,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:18:57,180 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 805 transitions. [2021-12-22 12:18:57,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-22 12:18:57,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:18:57,184 INFO L514 BasicCegarLoop]: 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] [2021-12-22 12:18:57,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 12:18:57,184 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:18:57,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:18:57,185 INFO L85 PathProgramCache]: Analyzing trace with hash 103897476, now seen corresponding path program 1 times [2021-12-22 12:18:57,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:18:57,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325835394] [2021-12-22 12:18:57,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:18:57,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:18:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:18:57,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:18:57,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:18:57,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325835394] [2021-12-22 12:18:57,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325835394] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:18:57,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:18:57,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:18:57,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043411838] [2021-12-22 12:18:57,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:18:57,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:18:57,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:18:57,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:18:57,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:18:57,386 INFO L87 Difference]: Start difference. First operand 488 states and 805 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:18:57,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:18:57,435 INFO L93 Difference]: Finished difference Result 1058 states and 1753 transitions. [2021-12-22 12:18:57,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:18:57,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-12-22 12:18:57,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:18:57,439 INFO L225 Difference]: With dead ends: 1058 [2021-12-22 12:18:57,439 INFO L226 Difference]: Without dead ends: 763 [2021-12-22 12:18:57,441 INFO L932 BasicCegarLoop]: 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 [2021-12-22 12:18:57,444 INFO L933 BasicCegarLoop]: 571 mSDtfsCounter, 231 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:18:57,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 1100 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:18:57,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-12-22 12:18:57,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 759. [2021-12-22 12:18:57,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 1.654353562005277) internal successors, (1254), 758 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:18:57,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1254 transitions. [2021-12-22 12:18:57,485 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1254 transitions. Word has length 121 [2021-12-22 12:18:57,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:18:57,486 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 1254 transitions. [2021-12-22 12:18:57,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:18:57,487 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1254 transitions. [2021-12-22 12:18:57,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-22 12:18:57,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:18:57,495 INFO L514 BasicCegarLoop]: 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] [2021-12-22 12:18:57,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 12:18:57,497 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:18:57,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:18:57,498 INFO L85 PathProgramCache]: Analyzing trace with hash 397712831, now seen corresponding path program 1 times [2021-12-22 12:18:57,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:18:57,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117656804] [2021-12-22 12:18:57,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:18:57,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:18:57,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:18:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:18:57,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:18:57,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117656804] [2021-12-22 12:18:57,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117656804] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:18:57,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:18:57,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:18:57,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678242899] [2021-12-22 12:18:57,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:18:57,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:18:57,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:18:57,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:18:57,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:18:57,579 INFO L87 Difference]: Start difference. First operand 759 states and 1254 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:18:57,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:18:57,645 INFO L93 Difference]: Finished difference Result 1851 states and 3064 transitions. [2021-12-22 12:18:57,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:18:57,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2021-12-22 12:18:57,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:18:57,652 INFO L225 Difference]: With dead ends: 1851 [2021-12-22 12:18:57,652 INFO L226 Difference]: Without dead ends: 1285 [2021-12-22 12:18:57,653 INFO L932 BasicCegarLoop]: 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 [2021-12-22 12:18:57,658 INFO L933 BasicCegarLoop]: 571 mSDtfsCounter, 224 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:18:57,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 1101 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:18:57,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-12-22 12:18:57,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1279. [2021-12-22 12:18:57,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1278 states have (on average 1.6510172143974962) internal successors, (2110), 1278 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:18:57,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 2110 transitions. [2021-12-22 12:18:57,723 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 2110 transitions. Word has length 124 [2021-12-22 12:18:57,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:18:57,724 INFO L470 AbstractCegarLoop]: Abstraction has 1279 states and 2110 transitions. [2021-12-22 12:18:57,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:18:57,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 2110 transitions. [2021-12-22 12:18:57,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-22 12:18:57,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:18:57,726 INFO L514 BasicCegarLoop]: 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] [2021-12-22 12:18:57,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 12:18:57,727 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:18:57,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:18:57,727 INFO L85 PathProgramCache]: Analyzing trace with hash 431510401, now seen corresponding path program 1 times [2021-12-22 12:18:57,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:18:57,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329908484] [2021-12-22 12:18:57,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:18:57,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:18:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:18:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:18:57,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:18:57,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329908484] [2021-12-22 12:18:57,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329908484] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:18:57,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:18:57,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:18:57,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363107394] [2021-12-22 12:18:57,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:18:57,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:18:57,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:18:57,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:18:57,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:18:57,846 INFO L87 Difference]: Start difference. First operand 1279 states and 2110 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:18:57,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:18:57,958 INFO L93 Difference]: Finished difference Result 3371 states and 5560 transitions. [2021-12-22 12:18:57,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:18:57,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2021-12-22 12:18:57,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:18:57,967 INFO L225 Difference]: With dead ends: 3371 [2021-12-22 12:18:57,967 INFO L226 Difference]: Without dead ends: 2285 [2021-12-22 12:18:57,970 INFO L932 BasicCegarLoop]: 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 [2021-12-22 12:18:57,973 INFO L933 BasicCegarLoop]: 570 mSDtfsCounter, 216 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:18:57,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 1099 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:18:57,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-12-22 12:18:58,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2275. [2021-12-22 12:18:58,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 2274 states have (on average 1.6402814423922603) internal successors, (3730), 2274 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:18:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 3730 transitions. [2021-12-22 12:18:58,081 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 3730 transitions. Word has length 127 [2021-12-22 12:18:58,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:18:58,082 INFO L470 AbstractCegarLoop]: Abstraction has 2275 states and 3730 transitions. [2021-12-22 12:18:58,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:18:58,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 3730 transitions. [2021-12-22 12:18:58,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-22 12:18:58,084 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:18:58,084 INFO L514 BasicCegarLoop]: 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] [2021-12-22 12:18:58,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 12:18:58,085 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:18:58,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:18:58,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1348551006, now seen corresponding path program 1 times [2021-12-22 12:18:58,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:18:58,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963197492] [2021-12-22 12:18:58,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:18:58,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:18:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:18:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:18:58,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:18:58,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963197492] [2021-12-22 12:18:58,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963197492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:18:58,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:18:58,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:18:58,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816702099] [2021-12-22 12:18:58,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:18:58,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:18:58,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:18:58,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:18:58,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:18:58,190 INFO L87 Difference]: Start difference. First operand 2275 states and 3730 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:18:58,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:18:58,835 INFO L93 Difference]: Finished difference Result 11927 states and 19706 transitions. [2021-12-22 12:18:58,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 12:18:58,835 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-12-22 12:18:58,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:18:58,869 INFO L225 Difference]: With dead ends: 11927 [2021-12-22 12:18:58,870 INFO L226 Difference]: Without dead ends: 9845 [2021-12-22 12:18:58,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-22 12:18:58,878 INFO L933 BasicCegarLoop]: 581 mSDtfsCounter, 2047 mSDsluCounter, 5076 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2047 SdHoareTripleChecker+Valid, 5657 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 12:18:58,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2047 Valid, 5657 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:18:58,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9845 states. [2021-12-22 12:18:59,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9845 to 4220. [2021-12-22 12:18:59,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4220 states, 4219 states have (on average 1.6401990993126334) internal successors, (6920), 4219 states have internal predecessors, (6920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:18:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4220 states to 4220 states and 6920 transitions. [2021-12-22 12:18:59,178 INFO L78 Accepts]: Start accepts. Automaton has 4220 states and 6920 transitions. Word has length 130 [2021-12-22 12:18:59,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:18:59,179 INFO L470 AbstractCegarLoop]: Abstraction has 4220 states and 6920 transitions. [2021-12-22 12:18:59,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:18:59,181 INFO L276 IsEmpty]: Start isEmpty. Operand 4220 states and 6920 transitions. [2021-12-22 12:18:59,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-22 12:18:59,183 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:18:59,184 INFO L514 BasicCegarLoop]: 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] [2021-12-22 12:18:59,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 12:18:59,184 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:18:59,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:18:59,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1077529784, now seen corresponding path program 1 times [2021-12-22 12:18:59,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:18:59,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58616994] [2021-12-22 12:18:59,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:18:59,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:18:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:18:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:18:59,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:18:59,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58616994] [2021-12-22 12:18:59,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58616994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:18:59,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:18:59,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:18:59,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899420509] [2021-12-22 12:18:59,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:18:59,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 12:18:59,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:18:59,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 12:18:59,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 12:18:59,255 INFO L87 Difference]: Start difference. First operand 4220 states and 6920 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:18:59,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:18:59,811 INFO L93 Difference]: Finished difference Result 12379 states and 20401 transitions. [2021-12-22 12:18:59,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 12:18:59,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-12-22 12:18:59,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:18:59,849 INFO L225 Difference]: With dead ends: 12379 [2021-12-22 12:18:59,849 INFO L226 Difference]: Without dead ends: 8352 [2021-12-22 12:18:59,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:18:59,857 INFO L933 BasicCegarLoop]: 576 mSDtfsCounter, 758 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 1913 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:18:59,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 1913 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:18:59,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2021-12-22 12:19:00,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 6269. [2021-12-22 12:19:00,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6269 states, 6268 states have (on average 1.6426292278238672) internal successors, (10296), 6268 states have internal predecessors, (10296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6269 states to 6269 states and 10296 transitions. [2021-12-22 12:19:00,199 INFO L78 Accepts]: Start accepts. Automaton has 6269 states and 10296 transitions. Word has length 131 [2021-12-22 12:19:00,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:19:00,199 INFO L470 AbstractCegarLoop]: Abstraction has 6269 states and 10296 transitions. [2021-12-22 12:19:00,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:00,200 INFO L276 IsEmpty]: Start isEmpty. Operand 6269 states and 10296 transitions. [2021-12-22 12:19:00,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-22 12:19:00,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:19:00,202 INFO L514 BasicCegarLoop]: 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] [2021-12-22 12:19:00,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 12:19:00,203 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:19:00,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:19:00,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1018819031, now seen corresponding path program 1 times [2021-12-22 12:19:00,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:19:00,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197164691] [2021-12-22 12:19:00,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:19:00,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:19:00,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:19:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:19:00,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:19:00,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197164691] [2021-12-22 12:19:00,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197164691] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:19:00,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:19:00,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:19:00,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552186415] [2021-12-22 12:19:00,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:19:00,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 12:19:00,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:19:00,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 12:19:00,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 12:19:00,258 INFO L87 Difference]: Start difference. First operand 6269 states and 10296 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:00,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:19:00,996 INFO L93 Difference]: Finished difference Result 18421 states and 30329 transitions. [2021-12-22 12:19:00,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 12:19:00,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-12-22 12:19:00,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:19:01,024 INFO L225 Difference]: With dead ends: 18421 [2021-12-22 12:19:01,024 INFO L226 Difference]: Without dead ends: 12345 [2021-12-22 12:19:01,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:19:01,035 INFO L933 BasicCegarLoop]: 563 mSDtfsCounter, 758 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 1902 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 12:19:01,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 1902 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:19:01,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12345 states. [2021-12-22 12:19:01,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12345 to 9283. [2021-12-22 12:19:01,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9283 states, 9282 states have (on average 1.641025641025641) internal successors, (15232), 9282 states have internal predecessors, (15232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:01,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9283 states to 9283 states and 15232 transitions. [2021-12-22 12:19:01,556 INFO L78 Accepts]: Start accepts. Automaton has 9283 states and 15232 transitions. Word has length 132 [2021-12-22 12:19:01,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:19:01,556 INFO L470 AbstractCegarLoop]: Abstraction has 9283 states and 15232 transitions. [2021-12-22 12:19:01,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:01,557 INFO L276 IsEmpty]: Start isEmpty. Operand 9283 states and 15232 transitions. [2021-12-22 12:19:01,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-22 12:19:01,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:19:01,561 INFO L514 BasicCegarLoop]: 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] [2021-12-22 12:19:01,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 12:19:01,561 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:19:01,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:19:01,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1576564833, now seen corresponding path program 1 times [2021-12-22 12:19:01,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:19:01,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118055699] [2021-12-22 12:19:01,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:19:01,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:19:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:19:01,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:19:01,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:19:01,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118055699] [2021-12-22 12:19:01,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118055699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:19:01,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:19:01,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:19:01,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263857335] [2021-12-22 12:19:01,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:19:01,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 12:19:01,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:19:01,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 12:19:01,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 12:19:01,612 INFO L87 Difference]: Start difference. First operand 9283 states and 15232 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:02,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:19:02,714 INFO L93 Difference]: Finished difference Result 27309 states and 44917 transitions. [2021-12-22 12:19:02,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 12:19:02,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-12-22 12:19:02,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:19:02,751 INFO L225 Difference]: With dead ends: 27309 [2021-12-22 12:19:02,751 INFO L226 Difference]: Without dead ends: 18219 [2021-12-22 12:19:02,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:19:02,763 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 756 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 1831 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:19:02,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 1831 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:19:02,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18219 states. [2021-12-22 12:19:03,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18219 to 13717. [2021-12-22 12:19:03,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13717 states, 13716 states have (on average 1.6393992417614465) internal successors, (22486), 13716 states have internal predecessors, (22486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:03,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13717 states to 13717 states and 22486 transitions. [2021-12-22 12:19:03,684 INFO L78 Accepts]: Start accepts. Automaton has 13717 states and 22486 transitions. Word has length 133 [2021-12-22 12:19:03,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:19:03,684 INFO L470 AbstractCegarLoop]: Abstraction has 13717 states and 22486 transitions. [2021-12-22 12:19:03,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:03,685 INFO L276 IsEmpty]: Start isEmpty. Operand 13717 states and 22486 transitions. [2021-12-22 12:19:03,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-22 12:19:03,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:19:03,689 INFO L514 BasicCegarLoop]: 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] [2021-12-22 12:19:03,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 12:19:03,689 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:19:03,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:19:03,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1092997201, now seen corresponding path program 1 times [2021-12-22 12:19:03,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:19:03,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606781785] [2021-12-22 12:19:03,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:19:03,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:19:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:19:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:19:03,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:19:03,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606781785] [2021-12-22 12:19:03,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606781785] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:19:03,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:19:03,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:19:03,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520603578] [2021-12-22 12:19:03,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:19:03,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:19:03,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:19:03,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:19:03,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:19:03,732 INFO L87 Difference]: Start difference. First operand 13717 states and 22486 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:04,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:19:04,889 INFO L93 Difference]: Finished difference Result 30564 states and 50300 transitions. [2021-12-22 12:19:04,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:19:04,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-12-22 12:19:04,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:19:04,933 INFO L225 Difference]: With dead ends: 30564 [2021-12-22 12:19:04,933 INFO L226 Difference]: Without dead ends: 21069 [2021-12-22 12:19:04,948 INFO L932 BasicCegarLoop]: 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 [2021-12-22 12:19:04,948 INFO L933 BasicCegarLoop]: 768 mSDtfsCounter, 237 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:19:04,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 1295 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:19:04,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21069 states. [2021-12-22 12:19:06,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21069 to 21067. [2021-12-22 12:19:06,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21067 states, 21066 states have (on average 1.6386594512484571) internal successors, (34520), 21066 states have internal predecessors, (34520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:06,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21067 states to 21067 states and 34520 transitions. [2021-12-22 12:19:06,379 INFO L78 Accepts]: Start accepts. Automaton has 21067 states and 34520 transitions. Word has length 134 [2021-12-22 12:19:06,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:19:06,379 INFO L470 AbstractCegarLoop]: Abstraction has 21067 states and 34520 transitions. [2021-12-22 12:19:06,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:06,380 INFO L276 IsEmpty]: Start isEmpty. Operand 21067 states and 34520 transitions. [2021-12-22 12:19:06,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-22 12:19:06,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:19:06,382 INFO L514 BasicCegarLoop]: 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] [2021-12-22 12:19:06,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 12:19:06,382 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:19:06,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:19:06,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1957895025, now seen corresponding path program 1 times [2021-12-22 12:19:06,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:19:06,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760490531] [2021-12-22 12:19:06,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:19:06,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:19:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:19:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:19:06,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:19:06,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760490531] [2021-12-22 12:19:06,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760490531] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:19:06,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:19:06,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:19:06,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516425983] [2021-12-22 12:19:06,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:19:06,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:19:06,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:19:06,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:19:06,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:19:06,424 INFO L87 Difference]: Start difference. First operand 21067 states and 34520 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:08,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:19:08,098 INFO L93 Difference]: Finished difference Result 46560 states and 76368 transitions. [2021-12-22 12:19:08,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:19:08,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-12-22 12:19:08,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:19:08,168 INFO L225 Difference]: With dead ends: 46560 [2021-12-22 12:19:08,169 INFO L226 Difference]: Without dead ends: 32027 [2021-12-22 12:19:08,194 INFO L932 BasicCegarLoop]: 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 [2021-12-22 12:19:08,195 INFO L933 BasicCegarLoop]: 742 mSDtfsCounter, 230 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:19:08,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 1270 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:19:08,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32027 states. [2021-12-22 12:19:10,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32027 to 32025. [2021-12-22 12:19:10,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32025 states, 32024 states have (on average 1.6338058955783163) internal successors, (52321), 32024 states have internal predecessors, (52321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:10,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32025 states to 32025 states and 52321 transitions. [2021-12-22 12:19:10,265 INFO L78 Accepts]: Start accepts. Automaton has 32025 states and 52321 transitions. Word has length 134 [2021-12-22 12:19:10,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:19:10,266 INFO L470 AbstractCegarLoop]: Abstraction has 32025 states and 52321 transitions. [2021-12-22 12:19:10,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:10,266 INFO L276 IsEmpty]: Start isEmpty. Operand 32025 states and 52321 transitions. [2021-12-22 12:19:10,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-22 12:19:10,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:19:10,268 INFO L514 BasicCegarLoop]: 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] [2021-12-22 12:19:10,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 12:19:10,268 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:19:10,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:19:10,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1682257488, now seen corresponding path program 1 times [2021-12-22 12:19:10,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:19:10,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294418439] [2021-12-22 12:19:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:19:10,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:19:10,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:19:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:19:10,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:19:10,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294418439] [2021-12-22 12:19:10,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294418439] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:19:10,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:19:10,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:19:10,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14470943] [2021-12-22 12:19:10,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:19:10,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 12:19:10,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:19:10,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 12:19:10,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 12:19:10,330 INFO L87 Difference]: Start difference. First operand 32025 states and 52321 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:14,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:19:14,287 INFO L93 Difference]: Finished difference Result 95013 states and 155765 transitions. [2021-12-22 12:19:14,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 12:19:14,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-12-22 12:19:14,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:19:14,438 INFO L225 Difference]: With dead ends: 95013 [2021-12-22 12:19:14,438 INFO L226 Difference]: Without dead ends: 63205 [2021-12-22 12:19:14,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:19:14,496 INFO L933 BasicCegarLoop]: 568 mSDtfsCounter, 754 mSDsluCounter, 1343 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 1911 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:19:14,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 1911 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:19:14,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63205 states. [2021-12-22 12:19:17,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63205 to 47481. [2021-12-22 12:19:17,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47481 states, 47480 states have (on average 1.6328559393428812) internal successors, (77528), 47480 states have internal predecessors, (77528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:18,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47481 states to 47481 states and 77528 transitions. [2021-12-22 12:19:18,096 INFO L78 Accepts]: Start accepts. Automaton has 47481 states and 77528 transitions. Word has length 134 [2021-12-22 12:19:18,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:19:18,096 INFO L470 AbstractCegarLoop]: Abstraction has 47481 states and 77528 transitions. [2021-12-22 12:19:18,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:18,097 INFO L276 IsEmpty]: Start isEmpty. Operand 47481 states and 77528 transitions. [2021-12-22 12:19:18,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-22 12:19:18,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:19:18,098 INFO L514 BasicCegarLoop]: 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] [2021-12-22 12:19:18,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 12:19:18,098 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:19:18,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:19:18,099 INFO L85 PathProgramCache]: Analyzing trace with hash 2036277819, now seen corresponding path program 1 times [2021-12-22 12:19:18,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:19:18,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108577025] [2021-12-22 12:19:18,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:19:18,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:19:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:19:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:19:18,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:19:18,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108577025] [2021-12-22 12:19:18,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108577025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:19:18,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:19:18,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:19:18,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193270129] [2021-12-22 12:19:18,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:19:18,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:19:18,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:19:18,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:19:18,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:19:18,139 INFO L87 Difference]: Start difference. First operand 47481 states and 77528 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:22,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:19:22,407 INFO L93 Difference]: Finished difference Result 104868 states and 171378 transitions. [2021-12-22 12:19:22,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:19:22,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-12-22 12:19:22,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:19:22,535 INFO L225 Difference]: With dead ends: 104868 [2021-12-22 12:19:22,535 INFO L226 Difference]: Without dead ends: 71739 [2021-12-22 12:19:22,565 INFO L932 BasicCegarLoop]: 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 [2021-12-22 12:19:22,565 INFO L933 BasicCegarLoop]: 708 mSDtfsCounter, 223 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:19:22,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 1237 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:19:22,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71739 states. [2021-12-22 12:19:27,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71739 to 71737. [2021-12-22 12:19:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71737 states, 71736 states have (on average 1.6268540202966433) internal successors, (116704), 71736 states have internal predecessors, (116704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71737 states to 71737 states and 116704 transitions. [2021-12-22 12:19:27,265 INFO L78 Accepts]: Start accepts. Automaton has 71737 states and 116704 transitions. Word has length 134 [2021-12-22 12:19:27,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:19:27,265 INFO L470 AbstractCegarLoop]: Abstraction has 71737 states and 116704 transitions. [2021-12-22 12:19:27,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:27,265 INFO L276 IsEmpty]: Start isEmpty. Operand 71737 states and 116704 transitions. [2021-12-22 12:19:27,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-22 12:19:27,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:19:27,267 INFO L514 BasicCegarLoop]: 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] [2021-12-22 12:19:27,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 12:19:27,267 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:19:27,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:19:27,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1806122865, now seen corresponding path program 1 times [2021-12-22 12:19:27,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:19:27,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857012062] [2021-12-22 12:19:27,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:19:27,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:19:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:19:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:19:27,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:19:27,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857012062] [2021-12-22 12:19:27,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857012062] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:19:27,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:19:27,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:19:27,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3532222] [2021-12-22 12:19:27,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:19:27,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:19:27,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:19:27,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:19:27,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:19:27,306 INFO L87 Difference]: Start difference. First operand 71737 states and 116704 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)