./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label09.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label09.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 7e1c4d2c7e091760d0cfd2192761696664946c8a36300f0a25d92c3977c93680 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 05:00:48,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 05:00:48,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 05:00:48,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 05:00:48,757 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 05:00:48,761 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 05:00:48,762 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 05:00:48,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 05:00:48,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 05:00:48,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 05:00:48,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 05:00:48,772 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 05:00:48,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 05:00:48,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 05:00:48,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 05:00:48,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 05:00:48,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 05:00:48,783 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 05:00:48,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 05:00:48,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 05:00:48,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 05:00:48,793 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 05:00:48,794 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 05:00:48,796 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 05:00:48,798 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 05:00:48,800 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 05:00:48,800 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 05:00:48,801 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 05:00:48,802 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 05:00:48,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 05:00:48,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 05:00:48,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 05:00:48,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 05:00:48,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 05:00:48,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 05:00:48,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 05:00:48,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 05:00:48,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 05:00:48,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 05:00:48,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 05:00:48,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 05:00:48,811 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 05:00:48,844 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 05:00:48,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 05:00:48,845 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 05:00:48,845 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 05:00:48,846 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 05:00:48,846 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 05:00:48,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 05:00:48,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 05:00:48,847 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 05:00:48,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 05:00:48,848 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 05:00:48,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 05:00:48,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 05:00:48,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 05:00:48,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 05:00:48,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 05:00:48,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 05:00:48,850 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 05:00:48,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 05:00:48,850 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 05:00:48,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 05:00:48,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 05:00:48,850 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 05:00:48,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 05:00:48,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 05:00:48,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 05:00:48,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 05:00:48,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 05:00:48,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 05:00:48,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 05:00:48,852 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 05:00:48,852 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 05:00:48,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 05:00:48,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 05:00:48,853 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e1c4d2c7e091760d0cfd2192761696664946c8a36300f0a25d92c3977c93680 [2021-12-17 05:00:49,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 05:00:49,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 05:00:49,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 05:00:49,114 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 05:00:49,115 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 05:00:49,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label09.c [2021-12-17 05:00:49,176 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b1f05544/ab4a0f85c8204b86a9366f73246a9c61/FLAG66ff691d8 [2021-12-17 05:00:49,813 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 05:00:49,813 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label09.c [2021-12-17 05:00:49,835 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b1f05544/ab4a0f85c8204b86a9366f73246a9c61/FLAG66ff691d8 [2021-12-17 05:00:50,162 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b1f05544/ab4a0f85c8204b86a9366f73246a9c61 [2021-12-17 05:00:50,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 05:00:50,166 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 05:00:50,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 05:00:50,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 05:00:50,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 05:00:50,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 05:00:50" (1/1) ... [2021-12-17 05:00:50,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18397487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:00:50, skipping insertion in model container [2021-12-17 05:00:50,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 05:00:50" (1/1) ... [2021-12-17 05:00:50,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 05:00:50,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 05:00:50,428 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label09.c[1938,1951] [2021-12-17 05:00:50,940 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 05:00:50,948 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 05:00:50,973 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label09.c[1938,1951] [2021-12-17 05:00:51,243 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 05:00:51,260 INFO L208 MainTranslator]: Completed translation [2021-12-17 05:00:51,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:00:51 WrapperNode [2021-12-17 05:00:51,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 05:00:51,262 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 05:00:51,263 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 05:00:51,263 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 05:00:51,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:00:51" (1/1) ... [2021-12-17 05:00:51,321 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:00:51" (1/1) ... [2021-12-17 05:00:51,615 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-17 05:00:51,615 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 05:00:51,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 05:00:51,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 05:00:51,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 05:00:51,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:00:51" (1/1) ... [2021-12-17 05:00:51,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:00:51" (1/1) ... [2021-12-17 05:00:51,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:00:51" (1/1) ... [2021-12-17 05:00:51,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:00:51" (1/1) ... [2021-12-17 05:00:51,915 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:00:51" (1/1) ... [2021-12-17 05:00:51,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:00:51" (1/1) ... [2021-12-17 05:00:52,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:00:51" (1/1) ... [2021-12-17 05:00:52,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 05:00:52,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 05:00:52,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 05:00:52,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 05:00:52,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:00:51" (1/1) ... [2021-12-17 05:00:52,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 05:00:52,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:00:52,117 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) [2021-12-17 05:00:52,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 05:00:52,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 05:00:52,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 05:00:52,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 05:00:52,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 05:00:52,225 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 05:00:52,227 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 05:00:55,101 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 05:00:55,118 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 05:00:55,118 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 05:00:55,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 05:00:55 BoogieIcfgContainer [2021-12-17 05:00:55,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 05:00:55,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 05:00:55,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 05:00:55,127 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 05:00:55,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 05:00:50" (1/3) ... [2021-12-17 05:00:55,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c1972bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 05:00:55, skipping insertion in model container [2021-12-17 05:00:55,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:00:51" (2/3) ... [2021-12-17 05:00:55,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c1972bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 05:00:55, skipping insertion in model container [2021-12-17 05:00:55,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 05:00:55" (3/3) ... [2021-12-17 05:00:55,132 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label09.c [2021-12-17 05:00:55,137 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 05:00:55,137 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 05:00:55,185 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 05:00:55,194 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 [2021-12-17 05:00:55,194 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 05:00:55,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:00:55,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-17 05:00:55,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:00:55,240 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:00:55,241 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:00:55,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:00:55,246 INFO L85 PathProgramCache]: Analyzing trace with hash -569068670, now seen corresponding path program 1 times [2021-12-17 05:00:55,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:00:55,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586416247] [2021-12-17 05:00:55,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:00:55,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:00:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:00:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:00:55,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:00:55,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586416247] [2021-12-17 05:00:55,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586416247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:00:55,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:00:55,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:00:55,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315491806] [2021-12-17 05:00:55,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:00:55,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:00:55,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:00:55,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:00:55,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:00:55,476 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:00:58,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:00:58,100 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2021-12-17 05:00:58,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:00:58,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-17 05:00:58,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:00:58,123 INFO L225 Difference]: With dead ends: 1642 [2021-12-17 05:00:58,123 INFO L226 Difference]: Without dead ends: 975 [2021-12-17 05:00:58,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:00:58,132 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 478 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 05:00:58,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 05:00:58,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-12-17 05:00:58,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2021-12-17 05:00:58,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:00:58,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2021-12-17 05:00:58,205 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 12 [2021-12-17 05:00:58,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:00:58,205 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2021-12-17 05:00:58,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:00:58,206 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2021-12-17 05:00:58,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-17 05:00:58,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:00:58,208 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:00:58,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 05:00:58,209 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:00:58,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:00:58,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1123053714, now seen corresponding path program 1 times [2021-12-17 05:00:58,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:00:58,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109215402] [2021-12-17 05:00:58,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:00:58,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:00:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:00:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:00:58,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:00:58,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109215402] [2021-12-17 05:00:58,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109215402] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:00:58,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:00:58,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:00:58,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287912103] [2021-12-17 05:00:58,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:00:58,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:00:58,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:00:58,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:00:58,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:00:58,380 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:00,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:01:00,570 INFO L93 Difference]: Finished difference Result 2814 states and 4242 transitions. [2021-12-17 05:01:00,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:01:00,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-17 05:01:00,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:01:00,584 INFO L225 Difference]: With dead ends: 2814 [2021-12-17 05:01:00,585 INFO L226 Difference]: Without dead ends: 1844 [2021-12-17 05:01:00,592 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 [2021-12-17 05:01:00,594 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 479 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 05:01:00,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 921 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 05:01:00,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-12-17 05:01:00,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1842. [2021-12-17 05:01:00,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 1.3601303639326452) internal successors, (2504), 1841 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:00,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2504 transitions. [2021-12-17 05:01:00,645 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2504 transitions. Word has length 82 [2021-12-17 05:01:00,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:01:00,645 INFO L470 AbstractCegarLoop]: Abstraction has 1842 states and 2504 transitions. [2021-12-17 05:01:00,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:00,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2504 transitions. [2021-12-17 05:01:00,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-17 05:01:00,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:01:00,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:01:00,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 05:01:00,649 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:01:00,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:01:00,650 INFO L85 PathProgramCache]: Analyzing trace with hash 987037905, now seen corresponding path program 1 times [2021-12-17 05:01:00,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:01:00,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946180844] [2021-12-17 05:01:00,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:01:00,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:01:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:01:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:01:00,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:01:00,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946180844] [2021-12-17 05:01:00,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946180844] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:01:00,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:01:00,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:01:00,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409668543] [2021-12-17 05:01:00,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:01:00,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:01:00,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:01:00,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:01:00,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:01:00,780 INFO L87 Difference]: Start difference. First operand 1842 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:02,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:01:02,955 INFO L93 Difference]: Finished difference Result 5445 states and 7408 transitions. [2021-12-17 05:01:02,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:01:02,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 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 104 [2021-12-17 05:01:02,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:01:02,973 INFO L225 Difference]: With dead ends: 5445 [2021-12-17 05:01:02,973 INFO L226 Difference]: Without dead ends: 3605 [2021-12-17 05:01:02,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:01:02,984 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 440 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 05:01:02,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 273 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 05:01:02,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3605 states. [2021-12-17 05:01:03,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3605 to 3583. [2021-12-17 05:01:03,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3582 states have (on average 1.3358458961474038) internal successors, (4785), 3582 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:03,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 4785 transitions. [2021-12-17 05:01:03,051 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 4785 transitions. Word has length 104 [2021-12-17 05:01:03,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:01:03,052 INFO L470 AbstractCegarLoop]: Abstraction has 3583 states and 4785 transitions. [2021-12-17 05:01:03,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:03,053 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 4785 transitions. [2021-12-17 05:01:03,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-17 05:01:03,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:01:03,060 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:01:03,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 05:01:03,061 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:01:03,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:01:03,062 INFO L85 PathProgramCache]: Analyzing trace with hash 463540948, now seen corresponding path program 1 times [2021-12-17 05:01:03,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:01:03,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966965504] [2021-12-17 05:01:03,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:01:03,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:01:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:01:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:01:03,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:01:03,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966965504] [2021-12-17 05:01:03,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966965504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:01:03,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:01:03,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:01:03,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688815848] [2021-12-17 05:01:03,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:01:03,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:01:03,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:01:03,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:01:03,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:01:03,241 INFO L87 Difference]: Start difference. First operand 3583 states and 4785 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:05,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:01:05,455 INFO L93 Difference]: Finished difference Result 8893 states and 11846 transitions. [2021-12-17 05:01:05,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:01:05,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2021-12-17 05:01:05,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:01:05,476 INFO L225 Difference]: With dead ends: 8893 [2021-12-17 05:01:05,476 INFO L226 Difference]: Without dead ends: 5312 [2021-12-17 05:01:05,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:01:05,489 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 352 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 05:01:05,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 537 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 05:01:05,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5312 states. [2021-12-17 05:01:05,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5312 to 5292. [2021-12-17 05:01:05,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5292 states, 5291 states have (on average 1.2797202797202798) internal successors, (6771), 5291 states have internal predecessors, (6771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:05,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5292 states to 5292 states and 6771 transitions. [2021-12-17 05:01:05,586 INFO L78 Accepts]: Start accepts. Automaton has 5292 states and 6771 transitions. Word has length 117 [2021-12-17 05:01:05,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:01:05,588 INFO L470 AbstractCegarLoop]: Abstraction has 5292 states and 6771 transitions. [2021-12-17 05:01:05,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:05,588 INFO L276 IsEmpty]: Start isEmpty. Operand 5292 states and 6771 transitions. [2021-12-17 05:01:05,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 05:01:05,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:01:05,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:01:05,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 05:01:05,591 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:01:05,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:01:05,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1189236261, now seen corresponding path program 1 times [2021-12-17 05:01:05,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:01:05,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499266057] [2021-12-17 05:01:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:01:05,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:01:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:01:05,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:01:05,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:01:05,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499266057] [2021-12-17 05:01:05,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499266057] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:01:05,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:01:05,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:01:05,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525615620] [2021-12-17 05:01:05,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:01:05,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:01:05,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:01:05,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:01:05,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:01:05,774 INFO L87 Difference]: Start difference. First operand 5292 states and 6771 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:07,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:01:07,689 INFO L93 Difference]: Finished difference Result 9327 states and 12044 transitions. [2021-12-17 05:01:07,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 05:01:07,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2021-12-17 05:01:07,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:01:07,700 INFO L225 Difference]: With dead ends: 9327 [2021-12-17 05:01:07,700 INFO L226 Difference]: Without dead ends: 4037 [2021-12-17 05:01:07,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 05:01:07,705 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 746 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 05:01:07,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 935 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 05:01:07,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4037 states. [2021-12-17 05:01:07,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4037 to 4008. [2021-12-17 05:01:07,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4008 states, 4007 states have (on average 1.3017219865235836) internal successors, (5216), 4007 states have internal predecessors, (5216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:07,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4008 states to 4008 states and 5216 transitions. [2021-12-17 05:01:07,764 INFO L78 Accepts]: Start accepts. Automaton has 4008 states and 5216 transitions. Word has length 123 [2021-12-17 05:01:07,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:01:07,765 INFO L470 AbstractCegarLoop]: Abstraction has 4008 states and 5216 transitions. [2021-12-17 05:01:07,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:07,768 INFO L276 IsEmpty]: Start isEmpty. Operand 4008 states and 5216 transitions. [2021-12-17 05:01:07,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-17 05:01:07,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:01:07,770 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:01:07,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 05:01:07,770 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:01:07,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:01:07,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1596477673, now seen corresponding path program 1 times [2021-12-17 05:01:07,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:01:07,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268556273] [2021-12-17 05:01:07,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:01:07,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:01:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:01:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-17 05:01:07,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:01:07,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268556273] [2021-12-17 05:01:07,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268556273] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:01:07,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:01:07,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:01:07,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342713899] [2021-12-17 05:01:07,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:01:07,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:01:07,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:01:07,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:01:07,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:01:07,863 INFO L87 Difference]: Start difference. First operand 4008 states and 5216 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:09,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:01:09,587 INFO L93 Difference]: Finished difference Result 10996 states and 14542 transitions. [2021-12-17 05:01:09,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:01:09,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 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 151 [2021-12-17 05:01:09,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:01:09,610 INFO L225 Difference]: With dead ends: 10996 [2021-12-17 05:01:09,610 INFO L226 Difference]: Without dead ends: 5711 [2021-12-17 05:01:09,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:01:09,621 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 05:01:09,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 05:01:09,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2021-12-17 05:01:09,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 4427. [2021-12-17 05:01:09,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4427 states, 4426 states have (on average 1.208992318120199) internal successors, (5351), 4426 states have internal predecessors, (5351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:09,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4427 states to 4427 states and 5351 transitions. [2021-12-17 05:01:09,704 INFO L78 Accepts]: Start accepts. Automaton has 4427 states and 5351 transitions. Word has length 151 [2021-12-17 05:01:09,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:01:09,705 INFO L470 AbstractCegarLoop]: Abstraction has 4427 states and 5351 transitions. [2021-12-17 05:01:09,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:09,705 INFO L276 IsEmpty]: Start isEmpty. Operand 4427 states and 5351 transitions. [2021-12-17 05:01:09,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-17 05:01:09,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:01:09,707 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:01:09,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 05:01:09,707 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:01:09,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:01:09,709 INFO L85 PathProgramCache]: Analyzing trace with hash -2026713307, now seen corresponding path program 1 times [2021-12-17 05:01:09,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:01:09,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338547477] [2021-12-17 05:01:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:01:09,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:01:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:01:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:01:09,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:01:09,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338547477] [2021-12-17 05:01:09,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338547477] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:01:09,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:01:09,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:01:09,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665816956] [2021-12-17 05:01:09,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:01:09,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:01:09,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:01:09,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:01:09,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:01:09,802 INFO L87 Difference]: Start difference. First operand 4427 states and 5351 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:11,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:01:11,348 INFO L93 Difference]: Finished difference Result 11399 states and 13997 transitions. [2021-12-17 05:01:11,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:01:11,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-12-17 05:01:11,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:01:11,366 INFO L225 Difference]: With dead ends: 11399 [2021-12-17 05:01:11,366 INFO L226 Difference]: Without dead ends: 6974 [2021-12-17 05:01:11,370 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 [2021-12-17 05:01:11,371 INFO L933 BasicCegarLoop]: 727 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 05:01:11,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 785 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-17 05:01:11,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6974 states. [2021-12-17 05:01:11,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6974 to 6974. [2021-12-17 05:01:11,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6974 states, 6973 states have (on average 1.1834217696830633) internal successors, (8252), 6973 states have internal predecessors, (8252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6974 states to 6974 states and 8252 transitions. [2021-12-17 05:01:11,470 INFO L78 Accepts]: Start accepts. Automaton has 6974 states and 8252 transitions. Word has length 164 [2021-12-17 05:01:11,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:01:11,471 INFO L470 AbstractCegarLoop]: Abstraction has 6974 states and 8252 transitions. [2021-12-17 05:01:11,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 6974 states and 8252 transitions. [2021-12-17 05:01:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-17 05:01:11,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:01:11,473 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:01:11,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 05:01:11,473 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:01:11,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:01:11,474 INFO L85 PathProgramCache]: Analyzing trace with hash -714630880, now seen corresponding path program 1 times [2021-12-17 05:01:11,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:01:11,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556207943] [2021-12-17 05:01:11,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:01:11,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:01:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:01:11,537 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-17 05:01:11,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:01:11,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556207943] [2021-12-17 05:01:11,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556207943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:01:11,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:01:11,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:01:11,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942111884] [2021-12-17 05:01:11,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:01:11,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:01:11,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:01:11,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:01:11,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:01:11,540 INFO L87 Difference]: Start difference. First operand 6974 states and 8252 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:13,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:01:13,160 INFO L93 Difference]: Finished difference Result 16914 states and 20159 transitions. [2021-12-17 05:01:13,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:01:13,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 166 [2021-12-17 05:01:13,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:01:13,176 INFO L225 Difference]: With dead ends: 16914 [2021-12-17 05:01:13,176 INFO L226 Difference]: Without dead ends: 9941 [2021-12-17 05:01:13,183 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 [2021-12-17 05:01:13,184 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 439 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 05:01:13,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-17 05:01:13,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9941 states. [2021-12-17 05:01:13,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9941 to 7373. [2021-12-17 05:01:13,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7373 states, 7372 states have (on average 1.1795984807379274) internal successors, (8696), 7372 states have internal predecessors, (8696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:13,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7373 states to 7373 states and 8696 transitions. [2021-12-17 05:01:13,344 INFO L78 Accepts]: Start accepts. Automaton has 7373 states and 8696 transitions. Word has length 166 [2021-12-17 05:01:13,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:01:13,345 INFO L470 AbstractCegarLoop]: Abstraction has 7373 states and 8696 transitions. [2021-12-17 05:01:13,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:13,346 INFO L276 IsEmpty]: Start isEmpty. Operand 7373 states and 8696 transitions. [2021-12-17 05:01:13,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-17 05:01:13,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:01:13,349 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:01:13,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 05:01:13,349 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:01:13,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:01:13,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1907858662, now seen corresponding path program 1 times [2021-12-17 05:01:13,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:01:13,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313457531] [2021-12-17 05:01:13,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:01:13,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:01:13,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:01:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-17 05:01:13,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:01:13,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313457531] [2021-12-17 05:01:13,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313457531] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:01:13,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:01:13,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:01:13,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007763554] [2021-12-17 05:01:13,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:01:13,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:01:13,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:01:13,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:01:13,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:01:13,445 INFO L87 Difference]: Start difference. First operand 7373 states and 8696 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:15,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:01:15,149 INFO L93 Difference]: Finished difference Result 16027 states and 18850 transitions. [2021-12-17 05:01:15,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:01:15,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 232 [2021-12-17 05:01:15,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:01:15,168 INFO L225 Difference]: With dead ends: 16027 [2021-12-17 05:01:15,169 INFO L226 Difference]: Without dead ends: 8656 [2021-12-17 05:01:15,176 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 [2021-12-17 05:01:15,177 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 424 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 05:01:15,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 894 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 05:01:15,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8656 states. [2021-12-17 05:01:15,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8656 to 8225. [2021-12-17 05:01:15,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8225 states, 8224 states have (on average 1.1723005836575875) internal successors, (9641), 8224 states have internal predecessors, (9641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:15,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8225 states to 8225 states and 9641 transitions. [2021-12-17 05:01:15,281 INFO L78 Accepts]: Start accepts. Automaton has 8225 states and 9641 transitions. Word has length 232 [2021-12-17 05:01:15,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:01:15,282 INFO L470 AbstractCegarLoop]: Abstraction has 8225 states and 9641 transitions. [2021-12-17 05:01:15,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:15,283 INFO L276 IsEmpty]: Start isEmpty. Operand 8225 states and 9641 transitions. [2021-12-17 05:01:15,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-12-17 05:01:15,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:01:15,286 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:01:15,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 05:01:15,287 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:01:15,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:01:15,287 INFO L85 PathProgramCache]: Analyzing trace with hash -793655037, now seen corresponding path program 1 times [2021-12-17 05:01:15,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:01:15,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128391117] [2021-12-17 05:01:15,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:01:15,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:01:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:01:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-17 05:01:15,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:01:15,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128391117] [2021-12-17 05:01:15,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128391117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:01:15,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:01:15,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:01:15,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531136846] [2021-12-17 05:01:15,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:01:15,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:01:15,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:01:15,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:01:15,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:01:15,404 INFO L87 Difference]: Start difference. First operand 8225 states and 9641 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:17,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:01:17,280 INFO L93 Difference]: Finished difference Result 20309 states and 24031 transitions. [2021-12-17 05:01:17,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:01:17,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2021-12-17 05:01:17,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:01:17,305 INFO L225 Difference]: With dead ends: 20309 [2021-12-17 05:01:17,306 INFO L226 Difference]: Without dead ends: 11658 [2021-12-17 05:01:17,316 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 [2021-12-17 05:01:17,317 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 494 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 05:01:17,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 633 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 05:01:17,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11658 states. [2021-12-17 05:01:17,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11658 to 10801. [2021-12-17 05:01:17,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10801 states, 10800 states have (on average 1.1797222222222221) internal successors, (12741), 10800 states have internal predecessors, (12741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:17,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10801 states to 10801 states and 12741 transitions. [2021-12-17 05:01:17,455 INFO L78 Accepts]: Start accepts. Automaton has 10801 states and 12741 transitions. Word has length 244 [2021-12-17 05:01:17,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:01:17,455 INFO L470 AbstractCegarLoop]: Abstraction has 10801 states and 12741 transitions. [2021-12-17 05:01:17,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:17,456 INFO L276 IsEmpty]: Start isEmpty. Operand 10801 states and 12741 transitions. [2021-12-17 05:01:17,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-12-17 05:01:17,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:01:17,460 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:01:17,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 05:01:17,461 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:01:17,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:01:17,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1956249984, now seen corresponding path program 1 times [2021-12-17 05:01:17,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:01:17,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039335782] [2021-12-17 05:01:17,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:01:17,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:01:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:01:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-17 05:01:17,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:01:17,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039335782] [2021-12-17 05:01:17,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039335782] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:01:17,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:01:17,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:01:17,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759732307] [2021-12-17 05:01:17,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:01:17,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:01:17,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:01:17,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:01:17,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:01:17,545 INFO L87 Difference]: Start difference. First operand 10801 states and 12741 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:19,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:01:19,155 INFO L93 Difference]: Finished difference Result 27125 states and 32440 transitions. [2021-12-17 05:01:19,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:01:19,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2021-12-17 05:01:19,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:01:19,186 INFO L225 Difference]: With dead ends: 27125 [2021-12-17 05:01:19,186 INFO L226 Difference]: Without dead ends: 16326 [2021-12-17 05:01:19,239 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 [2021-12-17 05:01:19,240 INFO L933 BasicCegarLoop]: 774 mSDtfsCounter, 379 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 05:01:19,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 841 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-17 05:01:19,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16326 states. [2021-12-17 05:01:19,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16326 to 15476. [2021-12-17 05:01:19,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15476 states, 15475 states have (on average 1.149919224555735) internal successors, (17795), 15475 states have internal predecessors, (17795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:19,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15476 states to 15476 states and 17795 transitions. [2021-12-17 05:01:19,414 INFO L78 Accepts]: Start accepts. Automaton has 15476 states and 17795 transitions. Word has length 249 [2021-12-17 05:01:19,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:01:19,415 INFO L470 AbstractCegarLoop]: Abstraction has 15476 states and 17795 transitions. [2021-12-17 05:01:19,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:19,415 INFO L276 IsEmpty]: Start isEmpty. Operand 15476 states and 17795 transitions. [2021-12-17 05:01:19,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-12-17 05:01:19,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:01:19,419 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:01:19,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 05:01:19,420 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:01:19,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:01:19,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1697609464, now seen corresponding path program 1 times [2021-12-17 05:01:19,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:01:19,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932718020] [2021-12-17 05:01:19,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:01:19,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:01:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:01:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-17 05:01:19,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:01:19,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932718020] [2021-12-17 05:01:19,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932718020] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:01:19,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:01:19,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:01:19,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166590285] [2021-12-17 05:01:19,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:01:19,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:01:19,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:01:19,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:01:19,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:01:19,535 INFO L87 Difference]: Start difference. First operand 15476 states and 17795 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:21,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:01:21,201 INFO L93 Difference]: Finished difference Result 36068 states and 41683 transitions. [2021-12-17 05:01:21,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:01:21,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 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 267 [2021-12-17 05:01:21,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:01:21,226 INFO L225 Difference]: With dead ends: 36068 [2021-12-17 05:01:21,226 INFO L226 Difference]: Without dead ends: 20162 [2021-12-17 05:01:21,242 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 [2021-12-17 05:01:21,243 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 430 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 05:01:21,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 347 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-17 05:01:21,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20162 states. [2021-12-17 05:01:21,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20162 to 19305. [2021-12-17 05:01:21,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19305 states, 19304 states have (on average 1.1543721508495648) internal successors, (22284), 19304 states have internal predecessors, (22284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:21,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19305 states to 19305 states and 22284 transitions. [2021-12-17 05:01:21,544 INFO L78 Accepts]: Start accepts. Automaton has 19305 states and 22284 transitions. Word has length 267 [2021-12-17 05:01:21,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:01:21,544 INFO L470 AbstractCegarLoop]: Abstraction has 19305 states and 22284 transitions. [2021-12-17 05:01:21,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:21,545 INFO L276 IsEmpty]: Start isEmpty. Operand 19305 states and 22284 transitions. [2021-12-17 05:01:21,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-12-17 05:01:21,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:01:21,551 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:01:21,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 05:01:21,552 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:01:21,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:01:21,552 INFO L85 PathProgramCache]: Analyzing trace with hash 360694187, now seen corresponding path program 1 times [2021-12-17 05:01:21,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:01:21,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311398857] [2021-12-17 05:01:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:01:21,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:01:21,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:01:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-17 05:01:21,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:01:21,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311398857] [2021-12-17 05:01:21,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311398857] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:01:21,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:01:21,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 05:01:21,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701566059] [2021-12-17 05:01:21,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:01:21,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:01:21,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:01:21,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:01:21,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:01:21,667 INFO L87 Difference]: Start difference. First operand 19305 states and 22284 transitions. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:24,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:01:24,644 INFO L93 Difference]: Finished difference Result 61248 states and 70663 transitions. [2021-12-17 05:01:24,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:01:24,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 272 [2021-12-17 05:01:24,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:01:24,686 INFO L225 Difference]: With dead ends: 61248 [2021-12-17 05:01:24,686 INFO L226 Difference]: Without dead ends: 40664 [2021-12-17 05:01:24,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:01:24,706 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 917 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 2604 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 3098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 2604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 05:01:24,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [917 Valid, 293 Invalid, 3098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 2604 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 05:01:24,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40664 states. [2021-12-17 05:01:25,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40664 to 40185. [2021-12-17 05:01:25,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40185 states, 40184 states have (on average 1.1385377264582919) internal successors, (45751), 40184 states have internal predecessors, (45751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:25,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40185 states to 40185 states and 45751 transitions. [2021-12-17 05:01:25,237 INFO L78 Accepts]: Start accepts. Automaton has 40185 states and 45751 transitions. Word has length 272 [2021-12-17 05:01:25,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:01:25,238 INFO L470 AbstractCegarLoop]: Abstraction has 40185 states and 45751 transitions. [2021-12-17 05:01:25,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:25,238 INFO L276 IsEmpty]: Start isEmpty. Operand 40185 states and 45751 transitions. [2021-12-17 05:01:25,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-12-17 05:01:25,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:01:25,242 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:01:25,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 05:01:25,242 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:01:25,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:01:25,243 INFO L85 PathProgramCache]: Analyzing trace with hash 348593291, now seen corresponding path program 1 times [2021-12-17 05:01:25,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:01:25,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176732517] [2021-12-17 05:01:25,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:01:25,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:01:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:01:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 19 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:01:25,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:01:25,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176732517] [2021-12-17 05:01:25,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176732517] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:01:25,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535673610] [2021-12-17 05:01:25,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:01:25,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:01:25,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:01:25,375 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 05:01:25,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 05:01:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:01:25,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 05:01:25,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:01:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 19 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:01:26,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 05:01:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:01:27,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535673610] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 05:01:27,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 05:01:27,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-17 05:01:27,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784383332] [2021-12-17 05:01:27,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:01:27,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:01:27,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:01:27,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:01:27,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:01:27,086 INFO L87 Difference]: Start difference. First operand 40185 states and 45751 transitions. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:29,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:01:29,994 INFO L93 Difference]: Finished difference Result 100382 states and 114289 transitions. [2021-12-17 05:01:29,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:01:29,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 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 301 [2021-12-17 05:01:29,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:01:30,067 INFO L225 Difference]: With dead ends: 100382 [2021-12-17 05:01:30,067 INFO L226 Difference]: Without dead ends: 59334 [2021-12-17 05:01:30,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 597 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:01:30,094 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 874 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2142 mSolverCounterSat, 837 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 2979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 837 IncrementalHoareTripleChecker+Valid, 2142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 05:01:30,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 145 Invalid, 2979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [837 Valid, 2142 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 05:01:30,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59334 states. [2021-12-17 05:01:30,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59334 to 57622. [2021-12-17 05:01:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57622 states, 57621 states have (on average 1.1240867045000955) internal successors, (64771), 57621 states have internal predecessors, (64771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:30,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57622 states to 57622 states and 64771 transitions. [2021-12-17 05:01:30,730 INFO L78 Accepts]: Start accepts. Automaton has 57622 states and 64771 transitions. Word has length 301 [2021-12-17 05:01:30,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:01:30,730 INFO L470 AbstractCegarLoop]: Abstraction has 57622 states and 64771 transitions. [2021-12-17 05:01:30,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:30,731 INFO L276 IsEmpty]: Start isEmpty. Operand 57622 states and 64771 transitions. [2021-12-17 05:01:30,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2021-12-17 05:01:30,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:01:30,734 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:01:30,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 05:01:30,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 05:01:30,959 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:01:30,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:01:30,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1195949683, now seen corresponding path program 1 times [2021-12-17 05:01:30,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:01:30,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505465405] [2021-12-17 05:01:30,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:01:30,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:01:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:01:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 193 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:01:31,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:01:31,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505465405] [2021-12-17 05:01:31,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505465405] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:01:31,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567840149] [2021-12-17 05:01:31,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:01:31,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:01:31,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:01:31,104 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 05:01:31,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 05:01:31,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:01:31,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 05:01:31,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:01:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 206 proven. 82 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 05:01:32,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 05:01:33,551 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 206 proven. 82 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 05:01:33,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567840149] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 05:01:33,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 05:01:33,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-12-17 05:01:33,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621092468] [2021-12-17 05:01:33,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 05:01:33,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 05:01:33,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:01:33,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 05:01:33,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-17 05:01:33,555 INFO L87 Difference]: Start difference. First operand 57622 states and 64771 transitions. Second operand has 9 states, 9 states have (on average 88.11111111111111) internal successors, (793), 9 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:46,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:01:46,609 INFO L93 Difference]: Finished difference Result 209888 states and 234493 transitions. [2021-12-17 05:01:46,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 05:01:46,610 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 88.11111111111111) internal successors, (793), 9 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 307 [2021-12-17 05:01:46,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:01:46,941 INFO L225 Difference]: With dead ends: 209888 [2021-12-17 05:01:46,941 INFO L226 Difference]: Without dead ends: 148437 [2021-12-17 05:01:47,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 624 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-12-17 05:01:47,003 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 11708 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 11876 mSolverCounterSat, 2594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11708 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 14470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2594 IncrementalHoareTripleChecker+Valid, 11876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2021-12-17 05:01:47,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11708 Valid, 481 Invalid, 14470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2594 Valid, 11876 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2021-12-17 05:01:47,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148437 states. [2021-12-17 05:01:48,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148437 to 113872. [2021-12-17 05:01:48,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113872 states, 113871 states have (on average 1.117659456753695) internal successors, (127269), 113871 states have internal predecessors, (127269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:49,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113872 states to 113872 states and 127269 transitions. [2021-12-17 05:01:49,025 INFO L78 Accepts]: Start accepts. Automaton has 113872 states and 127269 transitions. Word has length 307 [2021-12-17 05:01:49,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:01:49,026 INFO L470 AbstractCegarLoop]: Abstraction has 113872 states and 127269 transitions. [2021-12-17 05:01:49,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 88.11111111111111) internal successors, (793), 9 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:49,026 INFO L276 IsEmpty]: Start isEmpty. Operand 113872 states and 127269 transitions. [2021-12-17 05:01:49,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-12-17 05:01:49,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:01:49,035 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:01:49,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 05:01:49,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-17 05:01:49,241 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:01:49,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:01:49,241 INFO L85 PathProgramCache]: Analyzing trace with hash -76883218, now seen corresponding path program 1 times [2021-12-17 05:01:49,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:01:49,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651537170] [2021-12-17 05:01:49,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:01:49,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:01:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:01:49,501 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-12-17 05:01:49,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:01:49,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651537170] [2021-12-17 05:01:49,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651537170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:01:49,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:01:49,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:01:49,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527880849] [2021-12-17 05:01:49,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:01:49,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:01:49,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:01:49,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:01:49,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:01:49,503 INFO L87 Difference]: Start difference. First operand 113872 states and 127269 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:51,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:01:51,918 INFO L93 Difference]: Finished difference Result 238376 states and 266237 transitions. [2021-12-17 05:01:51,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:01:51,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 359 [2021-12-17 05:01:51,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:01:52,156 INFO L225 Difference]: With dead ends: 238376 [2021-12-17 05:01:52,156 INFO L226 Difference]: Without dead ends: 124502 [2021-12-17 05:01:52,183 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 [2021-12-17 05:01:52,184 INFO L933 BasicCegarLoop]: 645 mSDtfsCounter, 491 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 05:01:52,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 692 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-17 05:01:52,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124502 states. [2021-12-17 05:01:53,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124502 to 122370. [2021-12-17 05:01:53,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122370 states, 122369 states have (on average 1.1065956247088724) internal successors, (135413), 122369 states have internal predecessors, (135413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:53,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122370 states to 122370 states and 135413 transitions. [2021-12-17 05:01:53,992 INFO L78 Accepts]: Start accepts. Automaton has 122370 states and 135413 transitions. Word has length 359 [2021-12-17 05:01:53,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:01:53,993 INFO L470 AbstractCegarLoop]: Abstraction has 122370 states and 135413 transitions. [2021-12-17 05:01:53,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:53,993 INFO L276 IsEmpty]: Start isEmpty. Operand 122370 states and 135413 transitions. [2021-12-17 05:01:53,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2021-12-17 05:01:53,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:01:53,998 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:01:53,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 05:01:53,999 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:01:53,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:01:53,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1966190185, now seen corresponding path program 1 times [2021-12-17 05:01:54,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:01:54,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439773376] [2021-12-17 05:01:54,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:01:54,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:01:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:01:54,138 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 229 proven. 0 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2021-12-17 05:01:54,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:01:54,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439773376] [2021-12-17 05:01:54,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439773376] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:01:54,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:01:54,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:01:54,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106234171] [2021-12-17 05:01:54,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:01:54,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:01:54,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:01:54,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:01:54,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:01:54,142 INFO L87 Difference]: Start difference. First operand 122370 states and 135413 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:55,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:01:55,731 INFO L93 Difference]: Finished difference Result 239622 states and 264785 transitions. [2021-12-17 05:01:55,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:01:55,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 441 [2021-12-17 05:01:55,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:01:55,898 INFO L225 Difference]: With dead ends: 239622 [2021-12-17 05:01:55,898 INFO L226 Difference]: Without dead ends: 117678 [2021-12-17 05:01:55,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:01:55,959 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 605 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 05:01:55,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 101 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 05:01:56,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117678 states. [2021-12-17 05:01:57,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117678 to 117232. [2021-12-17 05:01:57,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117232 states, 117231 states have (on average 1.1023790635582738) internal successors, (129233), 117231 states have internal predecessors, (129233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:57,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117232 states to 117232 states and 129233 transitions. [2021-12-17 05:01:57,670 INFO L78 Accepts]: Start accepts. Automaton has 117232 states and 129233 transitions. Word has length 441 [2021-12-17 05:01:57,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:01:57,670 INFO L470 AbstractCegarLoop]: Abstraction has 117232 states and 129233 transitions. [2021-12-17 05:01:57,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:57,670 INFO L276 IsEmpty]: Start isEmpty. Operand 117232 states and 129233 transitions. [2021-12-17 05:01:57,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2021-12-17 05:01:57,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:01:57,676 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:01:57,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 05:01:57,677 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:01:57,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:01:57,677 INFO L85 PathProgramCache]: Analyzing trace with hash -772630316, now seen corresponding path program 1 times [2021-12-17 05:01:57,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:01:57,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958942191] [2021-12-17 05:01:57,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:01:57,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:01:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:01:57,843 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-17 05:01:57,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:01:57,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958942191] [2021-12-17 05:01:57,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958942191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:01:57,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:01:57,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:01:57,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492429959] [2021-12-17 05:01:57,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:01:57,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:01:57,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:01:57,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:01:57,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:01:57,848 INFO L87 Difference]: Start difference. First operand 117232 states and 129233 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:01:59,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:01:59,981 INFO L93 Difference]: Finished difference Result 219539 states and 241901 transitions. [2021-12-17 05:01:59,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:01:59,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 455 [2021-12-17 05:01:59,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:02:00,111 INFO L225 Difference]: With dead ends: 219539 [2021-12-17 05:02:00,112 INFO L226 Difference]: Without dead ends: 102733 [2021-12-17 05:02:00,178 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 [2021-12-17 05:02:00,179 INFO L933 BasicCegarLoop]: 641 mSDtfsCounter, 481 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 05:02:00,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 699 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 05:02:00,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102733 states. [2021-12-17 05:02:01,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102733 to 99750. [2021-12-17 05:02:01,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99750 states, 99749 states have (on average 1.0842715215190126) internal successors, (108155), 99749 states have internal predecessors, (108155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:01,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99750 states to 99750 states and 108155 transitions. [2021-12-17 05:02:01,677 INFO L78 Accepts]: Start accepts. Automaton has 99750 states and 108155 transitions. Word has length 455 [2021-12-17 05:02:01,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:02:01,678 INFO L470 AbstractCegarLoop]: Abstraction has 99750 states and 108155 transitions. [2021-12-17 05:02:01,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:01,678 INFO L276 IsEmpty]: Start isEmpty. Operand 99750 states and 108155 transitions. [2021-12-17 05:02:01,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2021-12-17 05:02:01,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:02:01,684 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:02:01,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 05:02:01,684 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:02:01,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:02:01,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1936301087, now seen corresponding path program 1 times [2021-12-17 05:02:01,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:02:01,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798957367] [2021-12-17 05:02:01,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:02:01,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:02:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:02:01,823 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2021-12-17 05:02:01,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:02:01,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798957367] [2021-12-17 05:02:01,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798957367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:02:01,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:02:01,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:02:01,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085607860] [2021-12-17 05:02:01,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:02:01,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:02:01,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:02:01,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:02:01,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:02:01,826 INFO L87 Difference]: Start difference. First operand 99750 states and 108155 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:04,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:02:04,094 INFO L93 Difference]: Finished difference Result 209728 states and 227283 transitions. [2021-12-17 05:02:04,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:02:04,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 461 [2021-12-17 05:02:04,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:02:04,256 INFO L225 Difference]: With dead ends: 209728 [2021-12-17 05:02:04,256 INFO L226 Difference]: Without dead ends: 108699 [2021-12-17 05:02:04,312 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 [2021-12-17 05:02:04,313 INFO L933 BasicCegarLoop]: 727 mSDtfsCounter, 439 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 05:02:04,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 778 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-17 05:02:04,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108699 states. [2021-12-17 05:02:05,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108699 to 104844. [2021-12-17 05:02:05,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104844 states, 104843 states have (on average 1.079909960607766) internal successors, (113221), 104843 states have internal predecessors, (113221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:06,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104844 states to 104844 states and 113221 transitions. [2021-12-17 05:02:06,089 INFO L78 Accepts]: Start accepts. Automaton has 104844 states and 113221 transitions. Word has length 461 [2021-12-17 05:02:06,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:02:06,089 INFO L470 AbstractCegarLoop]: Abstraction has 104844 states and 113221 transitions. [2021-12-17 05:02:06,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:06,089 INFO L276 IsEmpty]: Start isEmpty. Operand 104844 states and 113221 transitions. [2021-12-17 05:02:06,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2021-12-17 05:02:06,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:02:06,100 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:02:06,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 05:02:06,101 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:02:06,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:02:06,101 INFO L85 PathProgramCache]: Analyzing trace with hash -465471891, now seen corresponding path program 1 times [2021-12-17 05:02:06,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:02:06,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026944854] [2021-12-17 05:02:06,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:02:06,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:02:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:02:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 373 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-17 05:02:06,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:02:06,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026944854] [2021-12-17 05:02:06,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026944854] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:02:06,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124490304] [2021-12-17 05:02:06,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:02:06,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:02:06,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:02:06,331 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 05:02:06,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 05:02:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:02:06,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 05:02:06,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:02:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 373 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-17 05:02:08,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 05:02:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 454 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-17 05:02:09,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124490304] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 05:02:09,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 05:02:09,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-17 05:02:09,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180137678] [2021-12-17 05:02:09,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 05:02:09,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 05:02:09,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:02:09,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 05:02:09,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-17 05:02:09,823 INFO L87 Difference]: Start difference. First operand 104844 states and 113221 transitions. Second operand has 9 states, 9 states have (on average 83.33333333333333) internal successors, (750), 8 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:15,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:02:15,126 INFO L93 Difference]: Finished difference Result 223545 states and 241322 transitions. [2021-12-17 05:02:15,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 05:02:15,126 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 83.33333333333333) internal successors, (750), 8 states have internal predecessors, (750), 0 states have call successors, (0), 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 500 [2021-12-17 05:02:15,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:02:15,269 INFO L225 Difference]: With dead ends: 223545 [2021-12-17 05:02:15,269 INFO L226 Difference]: Without dead ends: 119128 [2021-12-17 05:02:15,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1008 GetRequests, 995 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-12-17 05:02:15,305 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 3155 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 5144 mSolverCounterSat, 812 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3155 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 5956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 812 IncrementalHoareTripleChecker+Valid, 5144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-17 05:02:15,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3155 Valid, 304 Invalid, 5956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [812 Valid, 5144 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-12-17 05:02:15,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119128 states. [2021-12-17 05:02:16,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119128 to 105689. [2021-12-17 05:02:16,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105689 states, 105688 states have (on average 1.0776530921202028) internal successors, (113895), 105688 states have internal predecessors, (113895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:16,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105689 states to 105689 states and 113895 transitions. [2021-12-17 05:02:16,816 INFO L78 Accepts]: Start accepts. Automaton has 105689 states and 113895 transitions. Word has length 500 [2021-12-17 05:02:16,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:02:16,817 INFO L470 AbstractCegarLoop]: Abstraction has 105689 states and 113895 transitions. [2021-12-17 05:02:16,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 83.33333333333333) internal successors, (750), 8 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:16,817 INFO L276 IsEmpty]: Start isEmpty. Operand 105689 states and 113895 transitions. [2021-12-17 05:02:16,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2021-12-17 05:02:16,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:02:16,828 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:02:16,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 05:02:17,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:02:17,037 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:02:17,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:02:17,037 INFO L85 PathProgramCache]: Analyzing trace with hash 859292367, now seen corresponding path program 1 times [2021-12-17 05:02:17,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:02:17,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773662054] [2021-12-17 05:02:17,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:02:17,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:02:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:02:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 350 proven. 10 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-17 05:02:17,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:02:17,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773662054] [2021-12-17 05:02:17,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773662054] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:02:17,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419639789] [2021-12-17 05:02:17,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:02:17,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:02:17,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:02:17,646 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 05:02:17,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 05:02:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:02:17,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 05:02:17,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:02:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 566 trivial. 0 not checked. [2021-12-17 05:02:18,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 05:02:18,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419639789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:02:18,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 05:02:18,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-12-17 05:02:18,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345218631] [2021-12-17 05:02:18,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:02:18,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:02:18,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:02:18,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:02:18,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:02:18,448 INFO L87 Difference]: Start difference. First operand 105689 states and 113895 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:20,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:02:20,023 INFO L93 Difference]: Finished difference Result 106975 states and 115226 transitions. [2021-12-17 05:02:20,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:02:20,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 528 [2021-12-17 05:02:20,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:02:20,148 INFO L225 Difference]: With dead ends: 106975 [2021-12-17 05:02:20,148 INFO L226 Difference]: Without dead ends: 106548 [2021-12-17 05:02:20,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 528 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:02:20,174 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 464 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 05:02:20,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 301 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 05:02:20,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106548 states. [2021-12-17 05:02:21,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106548 to 105689. [2021-12-17 05:02:21,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105689 states, 105688 states have (on average 1.0769813034592386) internal successors, (113824), 105688 states have internal predecessors, (113824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:21,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105689 states to 105689 states and 113824 transitions. [2021-12-17 05:02:21,688 INFO L78 Accepts]: Start accepts. Automaton has 105689 states and 113824 transitions. Word has length 528 [2021-12-17 05:02:21,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:02:21,688 INFO L470 AbstractCegarLoop]: Abstraction has 105689 states and 113824 transitions. [2021-12-17 05:02:21,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:21,689 INFO L276 IsEmpty]: Start isEmpty. Operand 105689 states and 113824 transitions. [2021-12-17 05:02:21,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2021-12-17 05:02:21,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:02:21,698 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:02:21,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-17 05:02:21,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:02:21,899 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:02:21,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:02:21,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1242475939, now seen corresponding path program 1 times [2021-12-17 05:02:21,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:02:21,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084685898] [2021-12-17 05:02:21,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:02:21,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:02:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:02:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 601 proven. 0 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-12-17 05:02:22,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:02:22,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084685898] [2021-12-17 05:02:22,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084685898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:02:22,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:02:22,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:02:22,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204351615] [2021-12-17 05:02:22,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:02:22,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:02:22,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:02:22,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:02:22,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:02:22,054 INFO L87 Difference]: Start difference. First operand 105689 states and 113824 transitions. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:24,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:02:24,126 INFO L93 Difference]: Finished difference Result 218184 states and 234942 transitions. [2021-12-17 05:02:24,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:02:24,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 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 560 [2021-12-17 05:02:24,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:02:24,273 INFO L225 Difference]: With dead ends: 218184 [2021-12-17 05:02:24,273 INFO L226 Difference]: Without dead ends: 112922 [2021-12-17 05:02:24,322 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 [2021-12-17 05:02:24,323 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 389 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 05:02:24,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 341 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 05:02:24,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112922 states. [2021-12-17 05:02:25,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112922 to 111637. [2021-12-17 05:02:25,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111637 states, 111636 states have (on average 1.074635422265219) internal successors, (119968), 111636 states have internal predecessors, (119968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:25,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111637 states to 111637 states and 119968 transitions. [2021-12-17 05:02:25,875 INFO L78 Accepts]: Start accepts. Automaton has 111637 states and 119968 transitions. Word has length 560 [2021-12-17 05:02:25,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:02:25,876 INFO L470 AbstractCegarLoop]: Abstraction has 111637 states and 119968 transitions. [2021-12-17 05:02:25,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:25,876 INFO L276 IsEmpty]: Start isEmpty. Operand 111637 states and 119968 transitions. [2021-12-17 05:02:25,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2021-12-17 05:02:25,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:02:25,893 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:02:25,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 05:02:25,893 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:02:25,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:02:25,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1098075819, now seen corresponding path program 1 times [2021-12-17 05:02:25,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:02:25,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804382329] [2021-12-17 05:02:25,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:02:25,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:02:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:02:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 907 trivial. 0 not checked. [2021-12-17 05:02:26,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:02:26,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804382329] [2021-12-17 05:02:26,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804382329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:02:26,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:02:26,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:02:26,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005351326] [2021-12-17 05:02:26,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:02:26,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:02:26,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:02:26,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:02:26,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:02:26,077 INFO L87 Difference]: Start difference. First operand 111637 states and 119968 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:28,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:02:28,433 INFO L93 Difference]: Finished difference Result 231799 states and 249348 transitions. [2021-12-17 05:02:28,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:02:28,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 576 [2021-12-17 05:02:28,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:02:28,608 INFO L225 Difference]: With dead ends: 231799 [2021-12-17 05:02:28,608 INFO L226 Difference]: Without dead ends: 120159 [2021-12-17 05:02:28,674 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 [2021-12-17 05:02:28,675 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 487 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 05:02:28,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 218 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 05:02:28,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120159 states. [2021-12-17 05:02:30,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120159 to 113340. [2021-12-17 05:02:30,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113340 states, 113339 states have (on average 1.0734080943011672) internal successors, (121659), 113339 states have internal predecessors, (121659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:30,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113340 states to 113340 states and 121659 transitions. [2021-12-17 05:02:30,545 INFO L78 Accepts]: Start accepts. Automaton has 113340 states and 121659 transitions. Word has length 576 [2021-12-17 05:02:30,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:02:30,546 INFO L470 AbstractCegarLoop]: Abstraction has 113340 states and 121659 transitions. [2021-12-17 05:02:30,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:30,546 INFO L276 IsEmpty]: Start isEmpty. Operand 113340 states and 121659 transitions. [2021-12-17 05:02:30,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2021-12-17 05:02:30,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:02:30,558 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:02:30,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 05:02:30,558 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:02:30,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:02:30,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1861228897, now seen corresponding path program 1 times [2021-12-17 05:02:30,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:02:30,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889616947] [2021-12-17 05:02:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:02:30,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:02:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:02:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 346 proven. 72 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-17 05:02:30,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:02:30,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889616947] [2021-12-17 05:02:30,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889616947] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:02:30,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107207363] [2021-12-17 05:02:30,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:02:30,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:02:30,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:02:30,800 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 05:02:30,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 05:02:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:02:30,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 05:02:30,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:02:31,910 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 244 proven. 10 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-17 05:02:31,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 05:02:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-17 05:02:32,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107207363] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 05:02:32,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 05:02:32,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2021-12-17 05:02:32,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895164725] [2021-12-17 05:02:32,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:02:32,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:02:32,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:02:32,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:02:32,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-17 05:02:32,592 INFO L87 Difference]: Start difference. First operand 113340 states and 121659 transitions. Second operand has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:35,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:02:35,929 INFO L93 Difference]: Finished difference Result 240731 states and 258810 transitions. [2021-12-17 05:02:35,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:02:35,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 0 states have call successors, (0), 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 579 [2021-12-17 05:02:35,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:02:36,094 INFO L225 Difference]: With dead ends: 240731 [2021-12-17 05:02:36,094 INFO L226 Difference]: Without dead ends: 126968 [2021-12-17 05:02:36,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1161 GetRequests, 1154 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-17 05:02:36,163 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 999 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2136 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 2759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 2136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 05:02:36,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [999 Valid, 122 Invalid, 2759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 2136 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 05:02:36,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126968 states. [2021-12-17 05:02:37,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126968 to 123544. [2021-12-17 05:02:37,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123544 states, 123543 states have (on average 1.0775357567810397) internal successors, (133122), 123543 states have internal predecessors, (133122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123544 states to 123544 states and 133122 transitions. [2021-12-17 05:02:38,118 INFO L78 Accepts]: Start accepts. Automaton has 123544 states and 133122 transitions. Word has length 579 [2021-12-17 05:02:38,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:02:38,118 INFO L470 AbstractCegarLoop]: Abstraction has 123544 states and 133122 transitions. [2021-12-17 05:02:38,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:38,118 INFO L276 IsEmpty]: Start isEmpty. Operand 123544 states and 133122 transitions. [2021-12-17 05:02:38,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2021-12-17 05:02:38,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:02:38,128 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:02:38,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 05:02:38,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-17 05:02:38,329 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:02:38,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:02:38,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2127350278, now seen corresponding path program 1 times [2021-12-17 05:02:38,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:02:38,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206713446] [2021-12-17 05:02:38,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:02:38,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:02:38,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:02:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 703 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-12-17 05:02:38,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:02:38,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206713446] [2021-12-17 05:02:38,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206713446] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:02:38,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:02:38,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:02:38,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242456537] [2021-12-17 05:02:38,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:02:38,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:02:38,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:02:38,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:02:38,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:02:38,526 INFO L87 Difference]: Start difference. First operand 123544 states and 133122 transitions. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:41,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:02:41,063 INFO L93 Difference]: Finished difference Result 263263 states and 283820 transitions. [2021-12-17 05:02:41,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:02:41,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 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 582 [2021-12-17 05:02:41,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:02:41,258 INFO L225 Difference]: With dead ends: 263263 [2021-12-17 05:02:41,259 INFO L226 Difference]: Without dead ends: 140146 [2021-12-17 05:02:41,329 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 [2021-12-17 05:02:41,330 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 329 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 05:02:41,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 750 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1214 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 05:02:41,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140146 states. [2021-12-17 05:02:42,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140146 to 137568. [2021-12-17 05:02:43,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137568 states, 137567 states have (on average 1.070678287670735) internal successors, (147290), 137567 states have internal predecessors, (147290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:43,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137568 states to 137568 states and 147290 transitions. [2021-12-17 05:02:43,595 INFO L78 Accepts]: Start accepts. Automaton has 137568 states and 147290 transitions. Word has length 582 [2021-12-17 05:02:43,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:02:43,596 INFO L470 AbstractCegarLoop]: Abstraction has 137568 states and 147290 transitions. [2021-12-17 05:02:43,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:43,596 INFO L276 IsEmpty]: Start isEmpty. Operand 137568 states and 147290 transitions. [2021-12-17 05:02:43,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 633 [2021-12-17 05:02:43,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:02:43,611 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:02:43,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 05:02:43,611 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:02:43,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:02:43,612 INFO L85 PathProgramCache]: Analyzing trace with hash 896755713, now seen corresponding path program 1 times [2021-12-17 05:02:43,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:02:43,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125545470] [2021-12-17 05:02:43,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:02:43,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:02:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:02:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 761 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-17 05:02:43,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:02:43,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125545470] [2021-12-17 05:02:43,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125545470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:02:43,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:02:43,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:02:43,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234014055] [2021-12-17 05:02:43,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:02:43,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:02:43,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:02:43,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:02:43,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:02:43,809 INFO L87 Difference]: Start difference. First operand 137568 states and 147290 transitions. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:02:46,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:02:46,217 INFO L93 Difference]: Finished difference Result 289615 states and 310193 transitions. [2021-12-17 05:02:46,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:02:46,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 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 632 [2021-12-17 05:02:46,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:02:46,424 INFO L225 Difference]: With dead ends: 289615 [2021-12-17 05:02:46,424 INFO L226 Difference]: Without dead ends: 152474 [2021-12-17 05:02:46,495 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 [2021-12-17 05:02:46,504 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 316 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 05:02:46,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 279 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 05:02:46,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152474 states.