./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label26.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/Problem12_label26.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 3e2e47b78067195f514cd980cc36561e3679a03106d39ad74c0665f1ff81079a --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 04:30:36,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 04:30:36,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 04:30:36,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 04:30:36,760 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 04:30:36,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 04:30:36,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 04:30:36,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 04:30:36,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 04:30:36,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 04:30:36,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 04:30:36,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 04:30:36,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 04:30:36,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 04:30:36,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 04:30:36,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 04:30:36,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 04:30:36,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 04:30:36,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 04:30:36,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 04:30:36,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 04:30:36,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 04:30:36,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 04:30:36,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 04:30:36,788 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 04:30:36,791 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 04:30:36,791 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 04:30:36,792 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 04:30:36,793 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 04:30:36,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 04:30:36,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 04:30:36,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 04:30:36,794 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 04:30:36,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 04:30:36,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 04:30:36,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 04:30:36,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 04:30:36,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 04:30:36,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 04:30:36,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 04:30:36,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 04:30:36,799 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 04:30:36,817 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 04:30:36,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 04:30:36,819 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 04:30:36,819 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 04:30:36,820 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 04:30:36,820 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 04:30:36,821 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 04:30:36,821 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 04:30:36,821 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 04:30:36,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 04:30:36,822 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 04:30:36,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 04:30:36,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 04:30:36,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 04:30:36,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 04:30:36,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 04:30:36,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 04:30:36,823 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 04:30:36,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 04:30:36,823 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 04:30:36,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 04:30:36,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 04:30:36,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 04:30:36,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 04:30:36,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:30:36,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 04:30:36,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 04:30:36,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 04:30:36,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 04:30:36,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 04:30:36,825 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 04:30:36,825 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 04:30:36,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 04:30:36,825 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 04:30:36,826 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e2e47b78067195f514cd980cc36561e3679a03106d39ad74c0665f1ff81079a [2021-12-17 04:30:37,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 04:30:37,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 04:30:37,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 04:30:37,046 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 04:30:37,047 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 04:30:37,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label26.c [2021-12-17 04:30:37,091 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf067e419/6ece544f80f9437bb8589e3603c6ba47/FLAG381c95970 [2021-12-17 04:30:37,657 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 04:30:37,658 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label26.c [2021-12-17 04:30:37,683 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf067e419/6ece544f80f9437bb8589e3603c6ba47/FLAG381c95970 [2021-12-17 04:30:37,888 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf067e419/6ece544f80f9437bb8589e3603c6ba47 [2021-12-17 04:30:37,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 04:30:37,893 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 04:30:37,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 04:30:37,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 04:30:37,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 04:30:37,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:30:37" (1/1) ... [2021-12-17 04:30:37,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2167f3f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:30:37, skipping insertion in model container [2021-12-17 04:30:37,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:30:37" (1/1) ... [2021-12-17 04:30:37,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 04:30:38,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 04:30:38,231 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/Problem12_label26.c[5703,5716] [2021-12-17 04:30:38,756 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:30:38,762 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 04:30:38,780 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/Problem12_label26.c[5703,5716] [2021-12-17 04:30:39,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:30:39,133 INFO L208 MainTranslator]: Completed translation [2021-12-17 04:30:39,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:30:39 WrapperNode [2021-12-17 04:30:39,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 04:30:39,136 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 04:30:39,136 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 04:30:39,136 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 04:30:39,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:30:39" (1/1) ... [2021-12-17 04:30:39,181 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:30:39" (1/1) ... [2021-12-17 04:30:39,479 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-12-17 04:30:39,480 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 04:30:39,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 04:30:39,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 04:30:39,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 04:30:39,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:30:39" (1/1) ... [2021-12-17 04:30:39,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:30:39" (1/1) ... [2021-12-17 04:30:39,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:30:39" (1/1) ... [2021-12-17 04:30:39,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:30:39" (1/1) ... [2021-12-17 04:30:39,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:30:39" (1/1) ... [2021-12-17 04:30:39,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:30:39" (1/1) ... [2021-12-17 04:30:39,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:30:39" (1/1) ... [2021-12-17 04:30:39,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 04:30:39,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 04:30:39,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 04:30:39,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 04:30:39,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:30:39" (1/1) ... [2021-12-17 04:30:39,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:30:39,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:30:39,981 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 04:30:40,027 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 04:30:40,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 04:30:40,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 04:30:40,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 04:30:40,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 04:30:40,147 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 04:30:40,148 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 04:30:42,673 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 04:30:42,683 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 04:30:42,684 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 04:30:42,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:30:42 BoogieIcfgContainer [2021-12-17 04:30:42,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 04:30:42,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 04:30:42,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 04:30:42,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 04:30:42,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:30:37" (1/3) ... [2021-12-17 04:30:42,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f007f99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:30:42, skipping insertion in model container [2021-12-17 04:30:42,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:30:39" (2/3) ... [2021-12-17 04:30:42,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f007f99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:30:42, skipping insertion in model container [2021-12-17 04:30:42,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:30:42" (3/3) ... [2021-12-17 04:30:42,692 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label26.c [2021-12-17 04:30:42,695 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 04:30:42,695 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 04:30:42,729 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 04:30:42,733 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 04:30:42,734 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 04:30:42,753 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 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 04:30:42,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 04:30:42,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:30:42,759 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:30:42,759 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:30:42,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:30:42,763 INFO L85 PathProgramCache]: Analyzing trace with hash -2068820151, now seen corresponding path program 1 times [2021-12-17 04:30:42,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:30:42,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760045700] [2021-12-17 04:30:42,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:30:42,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:30:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:30:42,966 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 04:30:42,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:30:42,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760045700] [2021-12-17 04:30:42,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760045700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:30:42,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:30:42,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:30:42,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998903513] [2021-12-17 04:30:42,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:30:42,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:30:42,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:30:42,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:30:42,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:30:42,993 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 04:30:48,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:30:48,146 INFO L93 Difference]: Finished difference Result 3142 states and 6130 transitions. [2021-12-17 04:30:48,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:30:48,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-12-17 04:30:48,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:30:48,176 INFO L225 Difference]: With dead ends: 3142 [2021-12-17 04:30:48,178 INFO L226 Difference]: Without dead ends: 2257 [2021-12-17 04:30:48,182 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 04:30:48,187 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 2219 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 5678 mSolverCounterSat, 1220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2219 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 6898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1220 IncrementalHoareTripleChecker+Valid, 5678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:30:48,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2219 Valid, 783 Invalid, 6898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1220 Valid, 5678 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-17 04:30:48,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-12-17 04:30:48,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2021-12-17 04:30:48,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.5802304964539007) internal successors, (3565), 2256 states have internal predecessors, (3565), 0 states have call successors, (0), 0 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 04:30:48,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3565 transitions. [2021-12-17 04:30:48,290 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3565 transitions. Word has length 45 [2021-12-17 04:30:48,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:30:48,291 INFO L470 AbstractCegarLoop]: Abstraction has 2257 states and 3565 transitions. [2021-12-17 04:30:48,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 04:30:48,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3565 transitions. [2021-12-17 04:30:48,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-17 04:30:48,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:30:48,294 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:30:48,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 04:30:48,294 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:30:48,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:30:48,295 INFO L85 PathProgramCache]: Analyzing trace with hash 937002619, now seen corresponding path program 1 times [2021-12-17 04:30:48,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:30:48,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010265242] [2021-12-17 04:30:48,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:30:48,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:30:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:30:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:30:48,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:30:48,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010265242] [2021-12-17 04:30:48,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010265242] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:30:48,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:30:48,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:30:48,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667597246] [2021-12-17 04:30:48,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:30:48,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:30:48,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:30:48,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:30:48,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:30:48,399 INFO L87 Difference]: Start difference. First operand 2257 states and 3565 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 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 04:30:51,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:30:51,455 INFO L93 Difference]: Finished difference Result 5300 states and 9213 transitions. [2021-12-17 04:30:51,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:30:51,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2021-12-17 04:30:51,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:30:51,467 INFO L225 Difference]: With dead ends: 5300 [2021-12-17 04:30:51,467 INFO L226 Difference]: Without dead ends: 3759 [2021-12-17 04:30:51,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:30:51,474 INFO L933 BasicCegarLoop]: 694 mSDtfsCounter, 704 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3107 mSolverCounterSat, 729 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 3836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 729 IncrementalHoareTripleChecker+Valid, 3107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:30:51,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 708 Invalid, 3836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [729 Valid, 3107 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:30:51,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2021-12-17 04:30:51,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3759. [2021-12-17 04:30:51,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.3685470995210218) internal successors, (5143), 3758 states have internal predecessors, (5143), 0 states have call successors, (0), 0 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 04:30:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 5143 transitions. [2021-12-17 04:30:51,526 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 5143 transitions. Word has length 116 [2021-12-17 04:30:51,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:30:51,528 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 5143 transitions. [2021-12-17 04:30:51,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 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 04:30:51,529 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 5143 transitions. [2021-12-17 04:30:51,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 04:30:51,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:30:51,538 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:30:51,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 04:30:51,540 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:30:51,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:30:51,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1563888852, now seen corresponding path program 1 times [2021-12-17 04:30:51,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:30:51,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280231933] [2021-12-17 04:30:51,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:30:51,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:30:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:30:51,742 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:30:51,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:30:51,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280231933] [2021-12-17 04:30:51,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280231933] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:30:51,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369586406] [2021-12-17 04:30:51,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:30:51,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:30:51,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:30:51,756 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 04:30:51,802 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 04:30:51,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:30:51,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:30:51,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:30:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-17 04:30:52,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:30:52,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369586406] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:30:52,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:30:52,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-17 04:30:52,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829055137] [2021-12-17 04:30:52,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:30:52,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:30:52,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:30:52,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:30:52,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:30:52,204 INFO L87 Difference]: Start difference. First operand 3759 states and 5143 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 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 04:30:54,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:30:54,707 INFO L93 Difference]: Finished difference Result 9018 states and 13078 transitions. [2021-12-17 04:30:54,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:30:54,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 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 190 [2021-12-17 04:30:54,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:30:54,729 INFO L225 Difference]: With dead ends: 9018 [2021-12-17 04:30:54,729 INFO L226 Difference]: Without dead ends: 6012 [2021-12-17 04:30:54,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:30:54,736 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 720 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2302 mSolverCounterSat, 702 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 3004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 702 IncrementalHoareTripleChecker+Valid, 2302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:30:54,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 104 Invalid, 3004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [702 Valid, 2302 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 04:30:54,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6012 states. [2021-12-17 04:30:54,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6012 to 5261. [2021-12-17 04:30:54,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 1.4636882129277566) internal successors, (7699), 5260 states have internal predecessors, (7699), 0 states have call successors, (0), 0 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 04:30:54,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 7699 transitions. [2021-12-17 04:30:54,818 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 7699 transitions. Word has length 190 [2021-12-17 04:30:54,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:30:54,819 INFO L470 AbstractCegarLoop]: Abstraction has 5261 states and 7699 transitions. [2021-12-17 04:30:54,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 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 04:30:54,819 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 7699 transitions. [2021-12-17 04:30:54,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-12-17 04:30:54,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:30:54,822 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:30:54,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 04:30:55,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:30:55,059 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:30:55,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:30:55,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1321864166, now seen corresponding path program 1 times [2021-12-17 04:30:55,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:30:55,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205789205] [2021-12-17 04:30:55,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:30:55,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:30:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:30:55,242 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-17 04:30:55,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:30:55,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205789205] [2021-12-17 04:30:55,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205789205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:30:55,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:30:55,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:30:55,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894443253] [2021-12-17 04:30:55,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:30:55,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:30:55,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:30:55,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:30:55,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:30:55,247 INFO L87 Difference]: Start difference. First operand 5261 states and 7699 transitions. Second operand has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 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 04:30:57,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:30:57,887 INFO L93 Difference]: Finished difference Result 12812 states and 19959 transitions. [2021-12-17 04:30:57,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:30:57,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 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 257 [2021-12-17 04:30:57,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:30:57,909 INFO L225 Difference]: With dead ends: 12812 [2021-12-17 04:30:57,909 INFO L226 Difference]: Without dead ends: 8267 [2021-12-17 04:30:57,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:30:57,916 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 851 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3408 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 3961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 3408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:30:57,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 324 Invalid, 3961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 3408 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:30:57,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8267 states. [2021-12-17 04:30:58,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8267 to 7514. [2021-12-17 04:30:58,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7514 states, 7513 states have (on average 1.4243311593238386) internal successors, (10701), 7513 states have internal predecessors, (10701), 0 states have call successors, (0), 0 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 04:30:58,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7514 states to 7514 states and 10701 transitions. [2021-12-17 04:30:58,099 INFO L78 Accepts]: Start accepts. Automaton has 7514 states and 10701 transitions. Word has length 257 [2021-12-17 04:30:58,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:30:58,099 INFO L470 AbstractCegarLoop]: Abstraction has 7514 states and 10701 transitions. [2021-12-17 04:30:58,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 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 04:30:58,100 INFO L276 IsEmpty]: Start isEmpty. Operand 7514 states and 10701 transitions. [2021-12-17 04:30:58,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-12-17 04:30:58,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:30:58,104 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:30:58,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 04:30:58,105 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:30:58,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:30:58,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1355808625, now seen corresponding path program 1 times [2021-12-17 04:30:58,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:30:58,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406084260] [2021-12-17 04:30:58,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:30:58,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:30:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:30:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-17 04:30:58,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:30:58,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406084260] [2021-12-17 04:30:58,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406084260] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:30:58,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:30:58,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:30:58,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257671787] [2021-12-17 04:30:58,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:30:58,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:30:58,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:30:58,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:30:58,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:30:58,206 INFO L87 Difference]: Start difference. First operand 7514 states and 10701 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 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 04:31:00,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:31:00,464 INFO L93 Difference]: Finished difference Result 18030 states and 26024 transitions. [2021-12-17 04:31:00,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:31:00,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 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 279 [2021-12-17 04:31:00,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:31:00,504 INFO L225 Difference]: With dead ends: 18030 [2021-12-17 04:31:00,504 INFO L226 Difference]: Without dead ends: 11269 [2021-12-17 04:31:00,520 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 04:31:00,522 INFO L933 BasicCegarLoop]: 416 mSDtfsCounter, 694 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1967 mSolverCounterSat, 782 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 2749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 782 IncrementalHoareTripleChecker+Valid, 1967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:31:00,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [694 Valid, 422 Invalid, 2749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [782 Valid, 1967 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 04:31:00,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11269 states. [2021-12-17 04:31:00,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11269 to 11269. [2021-12-17 04:31:00,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11269 states, 11268 states have (on average 1.2212460063897763) internal successors, (13761), 11268 states have internal predecessors, (13761), 0 states have call successors, (0), 0 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 04:31:00,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 13761 transitions. [2021-12-17 04:31:00,707 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 13761 transitions. Word has length 279 [2021-12-17 04:31:00,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:31:00,708 INFO L470 AbstractCegarLoop]: Abstraction has 11269 states and 13761 transitions. [2021-12-17 04:31:00,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 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 04:31:00,709 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 13761 transitions. [2021-12-17 04:31:00,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-12-17 04:31:00,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:31:00,713 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:31:00,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 04:31:00,713 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:31:00,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:31:00,714 INFO L85 PathProgramCache]: Analyzing trace with hash -499888435, now seen corresponding path program 1 times [2021-12-17 04:31:00,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:31:00,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998655611] [2021-12-17 04:31:00,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:31:00,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:31:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:31:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 299 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-17 04:31:00,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:31:00,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998655611] [2021-12-17 04:31:00,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998655611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:31:00,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:31:00,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:31:00,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732576872] [2021-12-17 04:31:00,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:31:00,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:31:00,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:31:00,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:31:00,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:31:00,866 INFO L87 Difference]: Start difference. First operand 11269 states and 13761 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 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 04:31:03,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:31:03,292 INFO L93 Difference]: Finished difference Result 26291 states and 32977 transitions. [2021-12-17 04:31:03,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:31:03,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 358 [2021-12-17 04:31:03,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:31:03,312 INFO L225 Difference]: With dead ends: 26291 [2021-12-17 04:31:03,312 INFO L226 Difference]: Without dead ends: 15775 [2021-12-17 04:31:03,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 04:31:03,320 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 780 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2166 mSolverCounterSat, 840 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 3006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 840 IncrementalHoareTripleChecker+Valid, 2166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:31:03,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 105 Invalid, 3006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [840 Valid, 2166 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:31:03,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15775 states. [2021-12-17 04:31:03,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15775 to 15775. [2021-12-17 04:31:03,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.2434385697984025) internal successors, (19614), 15774 states have internal predecessors, (19614), 0 states have call successors, (0), 0 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 04:31:03,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 19614 transitions. [2021-12-17 04:31:03,465 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 19614 transitions. Word has length 358 [2021-12-17 04:31:03,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:31:03,466 INFO L470 AbstractCegarLoop]: Abstraction has 15775 states and 19614 transitions. [2021-12-17 04:31:03,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 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 04:31:03,466 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 19614 transitions. [2021-12-17 04:31:03,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-12-17 04:31:03,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:31:03,470 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:31:03,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 04:31:03,471 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:31:03,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:31:03,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1774311319, now seen corresponding path program 1 times [2021-12-17 04:31:03,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:31:03,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474524464] [2021-12-17 04:31:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:31:03,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:31:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:31:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 128 proven. 108 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-17 04:31:03,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:31:03,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474524464] [2021-12-17 04:31:03,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474524464] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:31:03,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828465127] [2021-12-17 04:31:03,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:31:03,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:31:03,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:31:03,601 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 04:31:03,602 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 04:31:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:31:03,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:31:03,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:31:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 303 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-17 04:31:04,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:31:04,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828465127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:31:04,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:31:04,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 04:31:04,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096934028] [2021-12-17 04:31:04,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:31:04,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:31:04,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:31:04,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:31:04,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:31:04,193 INFO L87 Difference]: Start difference. First operand 15775 states and 19614 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 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 04:31:06,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:31:06,484 INFO L93 Difference]: Finished difference Result 34552 states and 43511 transitions. [2021-12-17 04:31:06,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:31:06,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 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 362 [2021-12-17 04:31:06,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:31:06,601 INFO L225 Difference]: With dead ends: 34552 [2021-12-17 04:31:06,601 INFO L226 Difference]: Without dead ends: 19530 [2021-12-17 04:31:06,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:31:06,613 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 761 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2067 mSolverCounterSat, 728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 728 IncrementalHoareTripleChecker+Valid, 2067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:31:06,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 235 Invalid, 2795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [728 Valid, 2067 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 04:31:06,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19530 states. [2021-12-17 04:31:06,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19530 to 19530. [2021-12-17 04:31:06,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19530 states, 19529 states have (on average 1.2406165190229914) internal successors, (24228), 19529 states have internal predecessors, (24228), 0 states have call successors, (0), 0 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 04:31:06,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19530 states to 19530 states and 24228 transitions. [2021-12-17 04:31:06,798 INFO L78 Accepts]: Start accepts. Automaton has 19530 states and 24228 transitions. Word has length 362 [2021-12-17 04:31:06,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:31:06,799 INFO L470 AbstractCegarLoop]: Abstraction has 19530 states and 24228 transitions. [2021-12-17 04:31:06,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 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 04:31:06,799 INFO L276 IsEmpty]: Start isEmpty. Operand 19530 states and 24228 transitions. [2021-12-17 04:31:06,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-12-17 04:31:06,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:31:06,804 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:31:06,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 04:31:07,019 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,SelfDestructingSolverStorable6 [2021-12-17 04:31:07,020 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:31:07,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:31:07,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1964185345, now seen corresponding path program 1 times [2021-12-17 04:31:07,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:31:07,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854947398] [2021-12-17 04:31:07,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:31:07,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:31:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:31:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-12-17 04:31:07,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:31:07,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854947398] [2021-12-17 04:31:07,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854947398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:31:07,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:31:07,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:31:07,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123822661] [2021-12-17 04:31:07,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:31:07,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:31:07,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:31:07,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:31:07,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:31:07,117 INFO L87 Difference]: Start difference. First operand 19530 states and 24228 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 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 04:31:09,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:31:09,720 INFO L93 Difference]: Finished difference Result 54829 states and 68728 transitions. [2021-12-17 04:31:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:31:09,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 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 373 [2021-12-17 04:31:09,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:31:09,766 INFO L225 Difference]: With dead ends: 54829 [2021-12-17 04:31:09,766 INFO L226 Difference]: Without dead ends: 36052 [2021-12-17 04:31:09,787 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 04:31:09,787 INFO L933 BasicCegarLoop]: 1352 mSDtfsCounter, 726 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2181 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 2864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 2181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:31:09,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 1360 Invalid, 2864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 2181 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 04:31:09,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36052 states. [2021-12-17 04:31:10,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36052 to 34550. [2021-12-17 04:31:10,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34550 states, 34549 states have (on average 1.1807288199369013) internal successors, (40793), 34549 states have internal predecessors, (40793), 0 states have call successors, (0), 0 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 04:31:10,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34550 states to 34550 states and 40793 transitions. [2021-12-17 04:31:10,278 INFO L78 Accepts]: Start accepts. Automaton has 34550 states and 40793 transitions. Word has length 373 [2021-12-17 04:31:10,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:31:10,279 INFO L470 AbstractCegarLoop]: Abstraction has 34550 states and 40793 transitions. [2021-12-17 04:31:10,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 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 04:31:10,279 INFO L276 IsEmpty]: Start isEmpty. Operand 34550 states and 40793 transitions. [2021-12-17 04:31:10,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2021-12-17 04:31:10,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:31:10,290 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:31:10,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 04:31:10,290 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:31:10,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:31:10,291 INFO L85 PathProgramCache]: Analyzing trace with hash -127783978, now seen corresponding path program 1 times [2021-12-17 04:31:10,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:31:10,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984486534] [2021-12-17 04:31:10,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:31:10,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:31:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:31:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 517 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-17 04:31:10,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:31:10,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984486534] [2021-12-17 04:31:10,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984486534] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:31:10,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:31:10,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:31:10,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020624150] [2021-12-17 04:31:10,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:31:10,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:31:10,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:31:10,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:31:10,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:31:10,406 INFO L87 Difference]: Start difference. First operand 34550 states and 40793 transitions. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 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 04:31:12,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:31:12,974 INFO L93 Difference]: Finished difference Result 84869 states and 100273 transitions. [2021-12-17 04:31:12,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:31:12,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 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 462 [2021-12-17 04:31:12,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:31:13,047 INFO L225 Difference]: With dead ends: 84869 [2021-12-17 04:31:13,047 INFO L226 Difference]: Without dead ends: 51072 [2021-12-17 04:31:13,074 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 04:31:13,075 INFO L933 BasicCegarLoop]: 1352 mSDtfsCounter, 635 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2699 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 3004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 2699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:31:13,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [635 Valid, 1360 Invalid, 3004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 2699 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:31:13,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51072 states. [2021-12-17 04:31:13,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51072 to 49570. [2021-12-17 04:31:13,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49570 states, 49569 states have (on average 1.170993968004196) internal successors, (58045), 49569 states have internal predecessors, (58045), 0 states have call successors, (0), 0 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 04:31:13,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49570 states to 49570 states and 58045 transitions. [2021-12-17 04:31:13,669 INFO L78 Accepts]: Start accepts. Automaton has 49570 states and 58045 transitions. Word has length 462 [2021-12-17 04:31:13,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:31:13,669 INFO L470 AbstractCegarLoop]: Abstraction has 49570 states and 58045 transitions. [2021-12-17 04:31:13,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 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 04:31:13,669 INFO L276 IsEmpty]: Start isEmpty. Operand 49570 states and 58045 transitions. [2021-12-17 04:31:13,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2021-12-17 04:31:13,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:31:13,678 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:31:13,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 04:31:13,678 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:31:13,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:31:13,679 INFO L85 PathProgramCache]: Analyzing trace with hash 301269280, now seen corresponding path program 1 times [2021-12-17 04:31:13,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:31:13,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476377116] [2021-12-17 04:31:13,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:31:13,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:31:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:31:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 419 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-17 04:31:13,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:31:13,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476377116] [2021-12-17 04:31:13,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476377116] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:31:13,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:31:13,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:31:13,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67625666] [2021-12-17 04:31:13,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:31:13,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:31:13,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:31:13,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:31:13,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:31:13,795 INFO L87 Difference]: Start difference. First operand 49570 states and 58045 transitions. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 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 04:31:16,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:31:16,033 INFO L93 Difference]: Finished difference Result 122419 states and 145479 transitions. [2021-12-17 04:31:16,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:31:16,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 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 466 [2021-12-17 04:31:16,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:31:16,121 INFO L225 Difference]: With dead ends: 122419 [2021-12-17 04:31:16,122 INFO L226 Difference]: Without dead ends: 69847 [2021-12-17 04:31:16,162 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 04:31:16,163 INFO L933 BasicCegarLoop]: 1258 mSDtfsCounter, 711 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2193 mSolverCounterSat, 613 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 2806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 613 IncrementalHoareTripleChecker+Valid, 2193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:31:16,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 1266 Invalid, 2806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [613 Valid, 2193 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 04:31:16,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69847 states. [2021-12-17 04:31:16,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69847 to 62337. [2021-12-17 04:31:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62337 states, 62336 states have (on average 1.1526244866529773) internal successors, (71850), 62336 states have internal predecessors, (71850), 0 states have call successors, (0), 0 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 04:31:16,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62337 states to 62337 states and 71850 transitions. [2021-12-17 04:31:16,904 INFO L78 Accepts]: Start accepts. Automaton has 62337 states and 71850 transitions. Word has length 466 [2021-12-17 04:31:16,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:31:16,904 INFO L470 AbstractCegarLoop]: Abstraction has 62337 states and 71850 transitions. [2021-12-17 04:31:16,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 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 04:31:16,905 INFO L276 IsEmpty]: Start isEmpty. Operand 62337 states and 71850 transitions. [2021-12-17 04:31:16,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2021-12-17 04:31:16,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:31:16,917 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 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, 1, 1, 1, 1, 1, 1, 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 04:31:16,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 04:31:16,918 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:31:16,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:31:16,918 INFO L85 PathProgramCache]: Analyzing trace with hash -2086807197, now seen corresponding path program 1 times [2021-12-17 04:31:16,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:31:16,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243449869] [2021-12-17 04:31:16,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:31:16,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:31:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:31:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 414 proven. 108 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-12-17 04:31:17,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:31:17,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243449869] [2021-12-17 04:31:17,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243449869] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:31:17,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959798482] [2021-12-17 04:31:17,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:31:17,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:31:17,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:31:17,124 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 04:31:17,127 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 04:31:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:31:17,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:31:17,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:31:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 457 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-12-17 04:31:17,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:31:17,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959798482] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:31:17,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:31:17,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-17 04:31:17,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230657589] [2021-12-17 04:31:17,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:31:17,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:31:17,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:31:17,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:31:17,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 04:31:17,934 INFO L87 Difference]: Start difference. First operand 62337 states and 71850 transitions. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:31:20,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:31:20,558 INFO L93 Difference]: Finished difference Result 123921 states and 142942 transitions. [2021-12-17 04:31:20,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:31:20,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 532 [2021-12-17 04:31:20,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:31:20,637 INFO L225 Difference]: With dead ends: 123921 [2021-12-17 04:31:20,637 INFO L226 Difference]: Without dead ends: 62337 [2021-12-17 04:31:20,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 04:31:20,804 INFO L933 BasicCegarLoop]: 1294 mSDtfsCounter, 685 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:31:20,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 1302 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 2082 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 04:31:20,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62337 states. [2021-12-17 04:31:21,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62337 to 60084. [2021-12-17 04:31:21,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60084 states, 60083 states have (on average 1.1125110264134614) internal successors, (66843), 60083 states have internal predecessors, (66843), 0 states have call successors, (0), 0 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 04:31:21,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60084 states to 60084 states and 66843 transitions. [2021-12-17 04:31:21,573 INFO L78 Accepts]: Start accepts. Automaton has 60084 states and 66843 transitions. Word has length 532 [2021-12-17 04:31:21,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:31:21,573 INFO L470 AbstractCegarLoop]: Abstraction has 60084 states and 66843 transitions. [2021-12-17 04:31:21,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:31:21,574 INFO L276 IsEmpty]: Start isEmpty. Operand 60084 states and 66843 transitions. [2021-12-17 04:31:21,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2021-12-17 04:31:21,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:31:21,585 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:31:21,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 04:31:21,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:31:21,804 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:31:21,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:31:21,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1428071453, now seen corresponding path program 1 times [2021-12-17 04:31:21,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:31:21,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516143644] [2021-12-17 04:31:21,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:31:21,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:31:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:31:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 128 proven. 14 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2021-12-17 04:31:22,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:31:22,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516143644] [2021-12-17 04:31:22,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516143644] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:31:22,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301573633] [2021-12-17 04:31:22,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:31:22,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:31:22,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:31:22,128 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 04:31:22,129 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 04:31:22,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:31:22,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:31:22,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:31:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-12-17 04:31:23,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:31:23,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301573633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:31:23,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:31:23,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-17 04:31:23,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98685062] [2021-12-17 04:31:23,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:31:23,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:31:23,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:31:23,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:31:23,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:31:23,079 INFO L87 Difference]: Start difference. First operand 60084 states and 66843 transitions. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 2 states have internal predecessors, (329), 0 states have call successors, (0), 0 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 04:31:25,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:31:25,145 INFO L93 Difference]: Finished difference Result 119415 states and 132928 transitions. [2021-12-17 04:31:25,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:31:25,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 2 states have internal predecessors, (329), 0 states have call successors, (0), 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 546 [2021-12-17 04:31:25,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:31:25,232 INFO L225 Difference]: With dead ends: 119415 [2021-12-17 04:31:25,232 INFO L226 Difference]: Without dead ends: 60084 [2021-12-17 04:31:25,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 545 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:31:25,272 INFO L933 BasicCegarLoop]: 397 mSDtfsCounter, 534 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2202 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 2688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 2202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:31:25,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 403 Invalid, 2688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 2202 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 04:31:25,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60084 states. [2021-12-17 04:31:25,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60084 to 58582. [2021-12-17 04:31:25,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58582 states, 58581 states have (on average 1.0728393165019374) internal successors, (62848), 58581 states have internal predecessors, (62848), 0 states have call successors, (0), 0 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 04:31:26,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58582 states to 58582 states and 62848 transitions. [2021-12-17 04:31:26,016 INFO L78 Accepts]: Start accepts. Automaton has 58582 states and 62848 transitions. Word has length 546 [2021-12-17 04:31:26,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:31:26,016 INFO L470 AbstractCegarLoop]: Abstraction has 58582 states and 62848 transitions. [2021-12-17 04:31:26,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 2 states have internal predecessors, (329), 0 states have call successors, (0), 0 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 04:31:26,016 INFO L276 IsEmpty]: Start isEmpty. Operand 58582 states and 62848 transitions. [2021-12-17 04:31:26,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 614 [2021-12-17 04:31:26,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:31:26,034 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:31:26,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 04:31:26,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:31:26,240 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:31:26,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:31:26,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1246390379, now seen corresponding path program 1 times [2021-12-17 04:31:26,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:31:26,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640495331] [2021-12-17 04:31:26,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:31:26,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:31:26,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:31:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-12-17 04:31:26,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:31:26,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640495331] [2021-12-17 04:31:26,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640495331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:31:26,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:31:26,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:31:26,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135210948] [2021-12-17 04:31:26,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:31:26,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:31:26,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:31:26,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:31:26,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:31:26,447 INFO L87 Difference]: Start difference. First operand 58582 states and 62848 transitions. Second operand has 4 states, 4 states have (on average 94.0) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 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 04:31:30,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:31:30,890 INFO L93 Difference]: Finished difference Result 176491 states and 190477 transitions. [2021-12-17 04:31:30,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:31:30,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 94.0) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 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 613 [2021-12-17 04:31:30,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:31:31,040 INFO L225 Difference]: With dead ends: 176491 [2021-12-17 04:31:31,041 INFO L226 Difference]: Without dead ends: 118662 [2021-12-17 04:31:31,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:31:31,076 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 1611 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 4981 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1611 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 5504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 4981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:31:31,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1611 Valid, 57 Invalid, 5504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 4981 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-12-17 04:31:31,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118662 states. [2021-12-17 04:31:32,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118662 to 117911. [2021-12-17 04:31:32,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117911 states, 117910 states have (on average 1.076142820795522) internal successors, (126888), 117910 states have internal predecessors, (126888), 0 states have call successors, (0), 0 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 04:31:32,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117911 states to 117911 states and 126888 transitions. [2021-12-17 04:31:32,718 INFO L78 Accepts]: Start accepts. Automaton has 117911 states and 126888 transitions. Word has length 613 [2021-12-17 04:31:32,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:31:32,723 INFO L470 AbstractCegarLoop]: Abstraction has 117911 states and 126888 transitions. [2021-12-17 04:31:32,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 94.0) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 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 04:31:32,724 INFO L276 IsEmpty]: Start isEmpty. Operand 117911 states and 126888 transitions. [2021-12-17 04:31:32,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 621 [2021-12-17 04:31:32,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:31:32,756 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:31:32,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 04:31:32,757 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:31:32,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:31:32,759 INFO L85 PathProgramCache]: Analyzing trace with hash 669514663, now seen corresponding path program 1 times [2021-12-17 04:31:32,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:31:32,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603947877] [2021-12-17 04:31:32,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:31:32,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:31:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:31:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 568 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-17 04:31:32,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:31:32,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603947877] [2021-12-17 04:31:32,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603947877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:31:32,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:31:32,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:31:32,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61281994] [2021-12-17 04:31:32,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:31:32,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:31:32,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:31:32,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:31:32,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:31:32,913 INFO L87 Difference]: Start difference. First operand 117911 states and 126888 transitions. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 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 04:31:35,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:31:35,762 INFO L93 Difference]: Finished difference Result 241077 states and 259192 transitions. [2021-12-17 04:31:35,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:31:35,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 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 620 [2021-12-17 04:31:35,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:31:35,953 INFO L225 Difference]: With dead ends: 241077 [2021-12-17 04:31:35,953 INFO L226 Difference]: Without dead ends: 123919 [2021-12-17 04:31:36,012 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 04:31:36,012 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 735 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2251 mSolverCounterSat, 665 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 2916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 665 IncrementalHoareTripleChecker+Valid, 2251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:31:36,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [735 Valid, 186 Invalid, 2916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [665 Valid, 2251 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 04:31:36,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123919 states. [2021-12-17 04:31:37,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123919 to 117911. [2021-12-17 04:31:37,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117911 states, 117910 states have (on average 1.071232295818845) internal successors, (126309), 117910 states have internal predecessors, (126309), 0 states have call successors, (0), 0 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 04:31:37,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117911 states to 117911 states and 126309 transitions. [2021-12-17 04:31:37,624 INFO L78 Accepts]: Start accepts. Automaton has 117911 states and 126309 transitions. Word has length 620 [2021-12-17 04:31:37,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:31:37,624 INFO L470 AbstractCegarLoop]: Abstraction has 117911 states and 126309 transitions. [2021-12-17 04:31:37,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 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 04:31:37,624 INFO L276 IsEmpty]: Start isEmpty. Operand 117911 states and 126309 transitions. [2021-12-17 04:31:37,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 659 [2021-12-17 04:31:37,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:31:37,653 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:31:37,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 04:31:37,653 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:31:37,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:31:37,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1989110500, now seen corresponding path program 1 times [2021-12-17 04:31:37,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:31:37,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116923557] [2021-12-17 04:31:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:31:37,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:31:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:31:38,022 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 575 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-17 04:31:38,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:31:38,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116923557] [2021-12-17 04:31:38,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116923557] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:31:38,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:31:38,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:31:38,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954463592] [2021-12-17 04:31:38,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:31:38,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:31:38,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:31:38,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:31:38,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:31:38,034 INFO L87 Difference]: Start difference. First operand 117911 states and 126309 transitions. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 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 04:31:41,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:31:41,383 INFO L93 Difference]: Finished difference Result 312422 states and 334578 transitions. [2021-12-17 04:31:41,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:31:41,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 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 658 [2021-12-17 04:31:41,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:31:41,888 INFO L225 Difference]: With dead ends: 312422 [2021-12-17 04:31:41,889 INFO L226 Difference]: Without dead ends: 195264 [2021-12-17 04:31:41,930 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 04:31:41,931 INFO L933 BasicCegarLoop]: 1275 mSDtfsCounter, 483 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2316 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 2316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:31:41,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 1283 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 2316 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:31:42,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195264 states. [2021-12-17 04:31:43,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195264 to 173485. [2021-12-17 04:31:43,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173485 states, 173484 states have (on average 1.0587258767379124) internal successors, (183672), 173484 states have internal predecessors, (183672), 0 states have call successors, (0), 0 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 04:31:44,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173485 states to 173485 states and 183672 transitions. [2021-12-17 04:31:44,169 INFO L78 Accepts]: Start accepts. Automaton has 173485 states and 183672 transitions. Word has length 658 [2021-12-17 04:31:44,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:31:44,170 INFO L470 AbstractCegarLoop]: Abstraction has 173485 states and 183672 transitions. [2021-12-17 04:31:44,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 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 04:31:44,170 INFO L276 IsEmpty]: Start isEmpty. Operand 173485 states and 183672 transitions. [2021-12-17 04:31:44,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2021-12-17 04:31:44,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:31:44,211 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:31:44,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 04:31:44,212 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:31:44,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:31:44,213 INFO L85 PathProgramCache]: Analyzing trace with hash 269841937, now seen corresponding path program 1 times [2021-12-17 04:31:44,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:31:44,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059431678] [2021-12-17 04:31:44,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:31:44,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:31:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:31:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 700 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-12-17 04:31:44,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:31:44,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059431678] [2021-12-17 04:31:44,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059431678] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:31:44,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:31:44,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:31:44,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650882048] [2021-12-17 04:31:44,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:31:44,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:31:44,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:31:44,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:31:44,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:31:44,412 INFO L87 Difference]: Start difference. First operand 173485 states and 183672 transitions. Second operand has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 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 04:31:47,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:31:47,803 INFO L93 Difference]: Finished difference Result 346217 states and 366586 transitions. [2021-12-17 04:31:47,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:31:47,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 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 774 [2021-12-17 04:31:47,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:31:48,088 INFO L225 Difference]: With dead ends: 346217 [2021-12-17 04:31:48,088 INFO L226 Difference]: Without dead ends: 173485 [2021-12-17 04:31:48,226 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 04:31:48,227 INFO L933 BasicCegarLoop]: 1254 mSDtfsCounter, 405 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2214 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 2553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 2214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:31:48,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 1262 Invalid, 2553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 2214 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 04:31:48,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173485 states. [2021-12-17 04:31:49,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173485 to 168979. [2021-12-17 04:31:50,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168979 states, 168978 states have (on average 1.0454141959308312) internal successors, (176652), 168978 states have internal predecessors, (176652), 0 states have call successors, (0), 0 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 04:31:50,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168979 states to 168979 states and 176652 transitions. [2021-12-17 04:31:50,260 INFO L78 Accepts]: Start accepts. Automaton has 168979 states and 176652 transitions. Word has length 774 [2021-12-17 04:31:50,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:31:50,261 INFO L470 AbstractCegarLoop]: Abstraction has 168979 states and 176652 transitions. [2021-12-17 04:31:50,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 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 04:31:50,261 INFO L276 IsEmpty]: Start isEmpty. Operand 168979 states and 176652 transitions. [2021-12-17 04:31:50,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 807 [2021-12-17 04:31:50,300 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:31:50,300 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:31:50,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 04:31:50,300 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:31:50,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:31:50,301 INFO L85 PathProgramCache]: Analyzing trace with hash 929980022, now seen corresponding path program 1 times [2021-12-17 04:31:50,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:31:50,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907294909] [2021-12-17 04:31:50,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:31:50,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:31:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:31:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-12-17 04:31:50,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:31:50,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907294909] [2021-12-17 04:31:50,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907294909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:31:50,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:31:50,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:31:50,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118654254] [2021-12-17 04:31:50,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:31:50,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:31:50,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:31:50,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:31:50,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:31:50,855 INFO L87 Difference]: Start difference. First operand 168979 states and 176652 transitions. Second operand has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 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 04:31:54,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:31:54,397 INFO L93 Difference]: Finished difference Result 410803 states and 430421 transitions. [2021-12-17 04:31:54,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:31:54,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 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 806 [2021-12-17 04:31:54,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:31:54,743 INFO L225 Difference]: With dead ends: 410803 [2021-12-17 04:31:54,743 INFO L226 Difference]: Without dead ends: 242577 [2021-12-17 04:31:54,826 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 04:31:54,827 INFO L933 BasicCegarLoop]: 594 mSDtfsCounter, 745 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 2846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:31:54,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [745 Valid, 601 Invalid, 2846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 2311 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:31:55,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242577 states. [2021-12-17 04:31:57,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242577 to 226806. [2021-12-17 04:31:57,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226806 states, 226805 states have (on average 1.0397213465311612) internal successors, (235814), 226805 states have internal predecessors, (235814), 0 states have call successors, (0), 0 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 04:31:57,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226806 states to 226806 states and 235814 transitions. [2021-12-17 04:31:57,980 INFO L78 Accepts]: Start accepts. Automaton has 226806 states and 235814 transitions. Word has length 806 [2021-12-17 04:31:57,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:31:57,980 INFO L470 AbstractCegarLoop]: Abstraction has 226806 states and 235814 transitions. [2021-12-17 04:31:57,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 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 04:31:57,987 INFO L276 IsEmpty]: Start isEmpty. Operand 226806 states and 235814 transitions. [2021-12-17 04:31:58,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 898 [2021-12-17 04:31:58,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:31:58,049 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:31:58,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 04:31:58,050 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:31:58,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:31:58,050 INFO L85 PathProgramCache]: Analyzing trace with hash 319500421, now seen corresponding path program 1 times [2021-12-17 04:31:58,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:31:58,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985301435] [2021-12-17 04:31:58,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:31:58,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:31:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:31:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 835 trivial. 0 not checked. [2021-12-17 04:31:58,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:31:58,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985301435] [2021-12-17 04:31:58,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985301435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:31:58,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:31:58,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:31:58,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135379442] [2021-12-17 04:31:58,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:31:58,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:31:58,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:31:58,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:31:58,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:31:58,273 INFO L87 Difference]: Start difference. First operand 226806 states and 235814 transitions. Second operand has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 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 04:32:02,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:32:02,058 INFO L93 Difference]: Finished difference Result 473136 states and 492953 transitions. [2021-12-17 04:32:02,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:32:02,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 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 897 [2021-12-17 04:32:02,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:32:02,560 INFO L225 Difference]: With dead ends: 473136 [2021-12-17 04:32:02,560 INFO L226 Difference]: Without dead ends: 284633 [2021-12-17 04:32:02,729 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 04:32:02,729 INFO L933 BasicCegarLoop]: 1384 mSDtfsCounter, 830 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2518 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 2621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:32:02,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [830 Valid, 1392 Invalid, 2621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2518 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 04:32:02,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284633 states. [2021-12-17 04:32:05,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284633 to 226806. [2021-12-17 04:32:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226806 states, 226805 states have (on average 1.0397213465311612) internal successors, (235814), 226805 states have internal predecessors, (235814), 0 states have call successors, (0), 0 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 04:32:06,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226806 states to 226806 states and 235814 transitions. [2021-12-17 04:32:06,067 INFO L78 Accepts]: Start accepts. Automaton has 226806 states and 235814 transitions. Word has length 897 [2021-12-17 04:32:06,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:32:06,068 INFO L470 AbstractCegarLoop]: Abstraction has 226806 states and 235814 transitions. [2021-12-17 04:32:06,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 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 04:32:06,068 INFO L276 IsEmpty]: Start isEmpty. Operand 226806 states and 235814 transitions. [2021-12-17 04:32:06,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 956 [2021-12-17 04:32:06,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:32:06,138 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:32:06,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 04:32:06,138 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:32:06,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:32:06,140 INFO L85 PathProgramCache]: Analyzing trace with hash 926094166, now seen corresponding path program 1 times [2021-12-17 04:32:06,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:32:06,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081926429] [2021-12-17 04:32:06,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:32:06,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:32:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:32:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 635 proven. 0 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2021-12-17 04:32:06,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:32:06,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081926429] [2021-12-17 04:32:06,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081926429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:32:06,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:32:06,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:32:06,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221720815] [2021-12-17 04:32:06,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:32:06,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:32:06,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:32:06,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:32:06,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:32:06,399 INFO L87 Difference]: Start difference. First operand 226806 states and 235814 transitions. Second operand has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 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 04:32:10,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:32:10,491 INFO L93 Difference]: Finished difference Result 533216 states and 555912 transitions. [2021-12-17 04:32:10,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:32:10,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 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 955 [2021-12-17 04:32:10,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:32:11,088 INFO L225 Difference]: With dead ends: 533216 [2021-12-17 04:32:11,089 INFO L226 Difference]: Without dead ends: 307163 [2021-12-17 04:32:11,261 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 04:32:11,261 INFO L933 BasicCegarLoop]: 1057 mSDtfsCounter, 652 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2507 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 2935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 2507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:32:11,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [652 Valid, 1065 Invalid, 2935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 2507 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:32:11,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307163 states.