./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label10.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_label10.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 af34cca1265ebda4ef436604d1992244d07816396f61d2a729ccbfca2d3a784e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 04:28:20,595 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 04:28:20,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 04:28:20,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 04:28:20,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 04:28:20,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 04:28:20,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 04:28:20,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 04:28:20,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 04:28:20,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 04:28:20,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 04:28:20,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 04:28:20,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 04:28:20,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 04:28:20,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 04:28:20,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 04:28:20,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 04:28:20,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 04:28:20,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 04:28:20,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 04:28:20,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 04:28:20,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 04:28:20,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 04:28:20,653 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 04:28:20,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 04:28:20,655 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 04:28:20,655 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 04:28:20,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 04:28:20,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 04:28:20,657 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 04:28:20,657 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 04:28:20,658 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 04:28:20,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 04:28:20,659 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 04:28:20,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 04:28:20,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 04:28:20,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 04:28:20,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 04:28:20,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 04:28:20,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 04:28:20,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 04:28:20,662 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 04:28:20,676 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 04:28:20,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 04:28:20,676 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 04:28:20,677 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 04:28:20,677 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 04:28:20,677 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 04:28:20,678 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 04:28:20,678 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 04:28:20,678 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 04:28:20,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 04:28:20,678 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 04:28:20,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 04:28:20,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 04:28:20,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 04:28:20,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 04:28:20,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 04:28:20,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 04:28:20,680 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 04:28:20,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 04:28:20,680 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 04:28:20,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 04:28:20,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 04:28:20,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 04:28:20,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 04:28:20,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:28:20,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 04:28:20,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 04:28:20,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 04:28:20,682 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 04:28:20,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 04:28:20,682 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 04:28:20,682 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 04:28:20,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 04:28:20,683 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 04:28:20,683 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af34cca1265ebda4ef436604d1992244d07816396f61d2a729ccbfca2d3a784e [2021-12-17 04:28:20,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 04:28:20,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 04:28:20,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 04:28:20,924 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 04:28:20,925 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 04:28:20,926 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label10.c [2021-12-17 04:28:20,981 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04409771f/421e10d14c0242f594212688f95dd91f/FLAG79a169f59 [2021-12-17 04:28:21,534 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 04:28:21,535 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label10.c [2021-12-17 04:28:21,559 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04409771f/421e10d14c0242f594212688f95dd91f/FLAG79a169f59 [2021-12-17 04:28:22,005 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04409771f/421e10d14c0242f594212688f95dd91f [2021-12-17 04:28:22,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 04:28:22,009 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 04:28:22,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 04:28:22,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 04:28:22,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 04:28:22,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:28:22" (1/1) ... [2021-12-17 04:28:22,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5082e96f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:28:22, skipping insertion in model container [2021-12-17 04:28:22,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:28:22" (1/1) ... [2021-12-17 04:28:22,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 04:28:22,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 04:28:22,303 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_label10.c[3658,3671] [2021-12-17 04:28:22,863 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:28:22,868 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 04:28:22,893 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_label10.c[3658,3671] [2021-12-17 04:28:23,154 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:28:23,170 INFO L208 MainTranslator]: Completed translation [2021-12-17 04:28:23,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:28:23 WrapperNode [2021-12-17 04:28:23,171 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 04:28:23,180 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 04:28:23,181 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 04:28:23,181 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 04:28:23,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:28:23" (1/1) ... [2021-12-17 04:28:23,231 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:28:23" (1/1) ... [2021-12-17 04:28:23,596 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-12-17 04:28:23,615 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 04:28:23,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 04:28:23,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 04:28:23,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 04:28:23,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:28:23" (1/1) ... [2021-12-17 04:28:23,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:28:23" (1/1) ... [2021-12-17 04:28:23,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:28:23" (1/1) ... [2021-12-17 04:28:23,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:28:23" (1/1) ... [2021-12-17 04:28:23,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:28:23" (1/1) ... [2021-12-17 04:28:23,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:28:23" (1/1) ... [2021-12-17 04:28:23,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:28:23" (1/1) ... [2021-12-17 04:28:24,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 04:28:24,085 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 04:28:24,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 04:28:24,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 04:28:24,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:28:23" (1/1) ... [2021-12-17 04:28:24,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:28:24,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:28:24,133 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 04:28:24,206 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 04:28:24,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 04:28:24,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 04:28:24,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 04:28:24,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 04:28:24,291 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 04:28:24,293 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 04:28:26,752 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 04:28:26,764 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 04:28:26,765 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 04:28:26,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:28:26 BoogieIcfgContainer [2021-12-17 04:28:26,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 04:28:26,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 04:28:26,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 04:28:26,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 04:28:26,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:28:22" (1/3) ... [2021-12-17 04:28:26,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d46806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:28:26, skipping insertion in model container [2021-12-17 04:28:26,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:28:23" (2/3) ... [2021-12-17 04:28:26,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d46806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:28:26, skipping insertion in model container [2021-12-17 04:28:26,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:28:26" (3/3) ... [2021-12-17 04:28:26,773 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label10.c [2021-12-17 04:28:26,777 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 04:28:26,777 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 04:28:26,812 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 04:28:26,817 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 04:28:26,817 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 04:28:26,838 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 04:28:26,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 04:28:26,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:28:26,843 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] [2021-12-17 04:28:26,843 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:28:26,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:28:26,847 INFO L85 PathProgramCache]: Analyzing trace with hash -438767135, now seen corresponding path program 1 times [2021-12-17 04:28:26,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:28:26,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746450228] [2021-12-17 04:28:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:28:26,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:28:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:28:27,036 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 04:28:27,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:28:27,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746450228] [2021-12-17 04:28:27,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746450228] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:28:27,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:28:27,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:28:27,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247256727] [2021-12-17 04:28:27,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:28:27,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:28:27,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:28:27,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:28:27,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:28:27,067 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 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:28:29,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:28:29,858 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2021-12-17 04:28:29,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:28:29,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-17 04:28:29,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:28:29,880 INFO L225 Difference]: With dead ends: 2388 [2021-12-17 04:28:29,880 INFO L226 Difference]: Without dead ends: 1506 [2021-12-17 04:28:29,885 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 04:28:29,887 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 870 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:28:29,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 156 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:28:29,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-12-17 04:28:29,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-12-17 04:28:29,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.8458471760797341) internal successors, (2778), 1505 states have internal predecessors, (2778), 0 states have call successors, (0), 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 04:28:29,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2778 transitions. [2021-12-17 04:28:29,968 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2778 transitions. Word has length 27 [2021-12-17 04:28:29,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:28:29,968 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2778 transitions. [2021-12-17 04:28:29,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:28:29,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2778 transitions. [2021-12-17 04:28:29,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-17 04:28:29,971 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:28:29,971 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:28:29,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 04:28:29,972 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:28:29,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:28:29,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1051202546, now seen corresponding path program 1 times [2021-12-17 04:28:29,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:28:29,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189258942] [2021-12-17 04:28:29,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:28:29,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:28:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:28:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:28:30,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:28:30,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189258942] [2021-12-17 04:28:30,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189258942] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:28:30,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:28:30,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:28:30,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171104418] [2021-12-17 04:28:30,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:28:30,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:28:30,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:28:30,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:28:30,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:28:30,076 INFO L87 Difference]: Start difference. First operand 1506 states and 2778 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 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 04:28:32,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:28:32,453 INFO L93 Difference]: Finished difference Result 3761 states and 6893 transitions. [2021-12-17 04:28:32,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:28:32,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-12-17 04:28:32,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:28:32,461 INFO L225 Difference]: With dead ends: 3761 [2021-12-17 04:28:32,462 INFO L226 Difference]: Without dead ends: 2257 [2021-12-17 04:28:32,467 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 04:28:32,468 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 780 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:28:32,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 448 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:28:32,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-12-17 04:28:32,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2021-12-17 04:28:32,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.4419326241134751) internal successors, (3253), 2256 states have internal predecessors, (3253), 0 states have call successors, (0), 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 04:28:32,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3253 transitions. [2021-12-17 04:28:32,515 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3253 transitions. Word has length 96 [2021-12-17 04:28:32,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:28:32,517 INFO L470 AbstractCegarLoop]: Abstraction has 2257 states and 3253 transitions. [2021-12-17 04:28:32,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 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 04:28:32,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3253 transitions. [2021-12-17 04:28:32,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-17 04:28:32,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:28:32,525 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:28:32,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 04:28:32,528 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:28:32,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:28:32,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2087433101, now seen corresponding path program 1 times [2021-12-17 04:28:32,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:28:32,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633876057] [2021-12-17 04:28:32,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:28:32,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:28:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:28:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 04:28:32,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:28:32,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633876057] [2021-12-17 04:28:32,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633876057] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:28:32,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:28:32,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:28:32,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24632093] [2021-12-17 04:28:32,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:28:32,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:28:32,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:28:32,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:28:32,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:28:32,650 INFO L87 Difference]: Start difference. First operand 2257 states and 3253 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 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 04:28:35,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:28:35,212 INFO L93 Difference]: Finished difference Result 6765 states and 9754 transitions. [2021-12-17 04:28:35,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:28:35,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 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 98 [2021-12-17 04:28:35,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:28:35,239 INFO L225 Difference]: With dead ends: 6765 [2021-12-17 04:28:35,251 INFO L226 Difference]: Without dead ends: 4510 [2021-12-17 04:28:35,253 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 04:28:35,254 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 726 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 2968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:28:35,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 618 Invalid, 2968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:28:35,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2021-12-17 04:28:35,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 4510. [2021-12-17 04:28:35,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 4509 states have (on average 1.2929696163229096) internal successors, (5830), 4509 states have internal predecessors, (5830), 0 states have call successors, (0), 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 04:28:35,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 5830 transitions. [2021-12-17 04:28:35,323 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 5830 transitions. Word has length 98 [2021-12-17 04:28:35,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:28:35,325 INFO L470 AbstractCegarLoop]: Abstraction has 4510 states and 5830 transitions. [2021-12-17 04:28:35,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 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 04:28:35,325 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 5830 transitions. [2021-12-17 04:28:35,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-17 04:28:35,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:28:35,328 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:28:35,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 04:28:35,329 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:28:35,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:28:35,330 INFO L85 PathProgramCache]: Analyzing trace with hash -271321694, now seen corresponding path program 1 times [2021-12-17 04:28:35,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:28:35,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149459425] [2021-12-17 04:28:35,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:28:35,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:28:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:28:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:28:35,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:28:35,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149459425] [2021-12-17 04:28:35,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149459425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:28:35,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:28:35,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:28:35,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666451193] [2021-12-17 04:28:35,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:28:35,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:28:35,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:28:35,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:28:35,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:28:35,455 INFO L87 Difference]: Start difference. First operand 4510 states and 5830 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:28:39,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:28:39,132 INFO L93 Difference]: Finished difference Result 14275 states and 18284 transitions. [2021-12-17 04:28:39,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:28:39,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-12-17 04:28:39,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:28:39,154 INFO L225 Difference]: With dead ends: 14275 [2021-12-17 04:28:39,154 INFO L226 Difference]: Without dead ends: 9767 [2021-12-17 04:28:39,157 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 04:28:39,158 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 2182 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 4712 mSolverCounterSat, 711 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2182 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 5423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 711 IncrementalHoareTripleChecker+Valid, 4712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:28:39,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2182 Valid, 164 Invalid, 5423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [711 Valid, 4712 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-17 04:28:39,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2021-12-17 04:28:39,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2021-12-17 04:28:39,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.255785377841491) internal successors, (12264), 9766 states have internal predecessors, (12264), 0 states have call successors, (0), 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 04:28:39,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12264 transitions. [2021-12-17 04:28:39,283 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12264 transitions. Word has length 104 [2021-12-17 04:28:39,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:28:39,284 INFO L470 AbstractCegarLoop]: Abstraction has 9767 states and 12264 transitions. [2021-12-17 04:28:39,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:28:39,285 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12264 transitions. [2021-12-17 04:28:39,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-17 04:28:39,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:28:39,286 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:28:39,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 04:28:39,286 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:28:39,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:28:39,287 INFO L85 PathProgramCache]: Analyzing trace with hash -882153392, now seen corresponding path program 1 times [2021-12-17 04:28:39,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:28:39,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241558418] [2021-12-17 04:28:39,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:28:39,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:28:39,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:28:39,430 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:28:39,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:28:39,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241558418] [2021-12-17 04:28:39,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241558418] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:28:39,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:28:39,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:28:39,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947265966] [2021-12-17 04:28:39,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:28:39,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:28:39,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:28:39,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:28:39,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:28:39,432 INFO L87 Difference]: Start difference. First operand 9767 states and 12264 transitions. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:28:42,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:28:42,062 INFO L93 Difference]: Finished difference Result 21822 states and 27290 transitions. [2021-12-17 04:28:42,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:28:42,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-12-17 04:28:42,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:28:42,093 INFO L225 Difference]: With dead ends: 21822 [2021-12-17 04:28:42,093 INFO L226 Difference]: Without dead ends: 12771 [2021-12-17 04:28:42,100 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 04:28:42,101 INFO L933 BasicCegarLoop]: 598 mSDtfsCounter, 690 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3680 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 3881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 3680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:28:42,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 616 Invalid, 3881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 3680 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:28:42,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12771 states. [2021-12-17 04:28:42,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12771 to 12020. [2021-12-17 04:28:42,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12020 states, 12019 states have (on average 1.2085032032615026) internal successors, (14525), 12019 states have internal predecessors, (14525), 0 states have call successors, (0), 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 04:28:42,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12020 states to 12020 states and 14525 transitions. [2021-12-17 04:28:42,284 INFO L78 Accepts]: Start accepts. Automaton has 12020 states and 14525 transitions. Word has length 175 [2021-12-17 04:28:42,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:28:42,285 INFO L470 AbstractCegarLoop]: Abstraction has 12020 states and 14525 transitions. [2021-12-17 04:28:42,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:28:42,288 INFO L276 IsEmpty]: Start isEmpty. Operand 12020 states and 14525 transitions. [2021-12-17 04:28:42,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-17 04:28:42,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:28:42,290 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 04:28:42,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 04:28:42,291 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:28:42,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:28:42,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1637516530, now seen corresponding path program 1 times [2021-12-17 04:28:42,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:28:42,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069143659] [2021-12-17 04:28:42,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:28:42,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:28:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:28:42,399 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-17 04:28:42,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:28:42,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069143659] [2021-12-17 04:28:42,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069143659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:28:42,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:28:42,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:28:42,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230522070] [2021-12-17 04:28:42,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:28:42,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:28:42,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:28:42,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:28:42,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:28:42,402 INFO L87 Difference]: Start difference. First operand 12020 states and 14525 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 04:28:44,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:28:44,836 INFO L93 Difference]: Finished difference Result 27793 states and 34552 transitions. [2021-12-17 04:28:44,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:28:44,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2021-12-17 04:28:44,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:28:44,865 INFO L225 Difference]: With dead ends: 27793 [2021-12-17 04:28:44,866 INFO L226 Difference]: Without dead ends: 16526 [2021-12-17 04:28:44,880 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 04:28:44,882 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 759 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 2844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:28:44,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [759 Valid, 495 Invalid, 2844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:28:44,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16526 states. [2021-12-17 04:28:44,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16526 to 12020. [2021-12-17 04:28:45,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12020 states, 12019 states have (on average 1.2085032032615026) internal successors, (14525), 12019 states have internal predecessors, (14525), 0 states have call successors, (0), 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 04:28:45,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12020 states to 12020 states and 14525 transitions. [2021-12-17 04:28:45,023 INFO L78 Accepts]: Start accepts. Automaton has 12020 states and 14525 transitions. Word has length 239 [2021-12-17 04:28:45,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:28:45,024 INFO L470 AbstractCegarLoop]: Abstraction has 12020 states and 14525 transitions. [2021-12-17 04:28:45,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 04:28:45,024 INFO L276 IsEmpty]: Start isEmpty. Operand 12020 states and 14525 transitions. [2021-12-17 04:28:45,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-17 04:28:45,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:28:45,026 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:28:45,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 04:28:45,026 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:28:45,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:28:45,027 INFO L85 PathProgramCache]: Analyzing trace with hash -743420007, now seen corresponding path program 1 times [2021-12-17 04:28:45,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:28:45,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576473785] [2021-12-17 04:28:45,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:28:45,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:28:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:28:45,103 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:28:45,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:28:45,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576473785] [2021-12-17 04:28:45,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576473785] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:28:45,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:28:45,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:28:45,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258804137] [2021-12-17 04:28:45,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:28:45,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:28:45,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:28:45,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:28:45,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:28:45,161 INFO L87 Difference]: Start difference. First operand 12020 states and 14525 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 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 04:28:47,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:28:47,689 INFO L93 Difference]: Finished difference Result 29295 states and 35480 transitions. [2021-12-17 04:28:47,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:28:47,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 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 240 [2021-12-17 04:28:47,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:28:47,715 INFO L225 Difference]: With dead ends: 29295 [2021-12-17 04:28:47,716 INFO L226 Difference]: Without dead ends: 18028 [2021-12-17 04:28:47,728 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 04:28:47,728 INFO L933 BasicCegarLoop]: 1261 mSDtfsCounter, 684 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2658 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 2999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 2658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:28:47,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 1268 Invalid, 2999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 2658 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 04:28:47,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18028 states. [2021-12-17 04:28:47,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18028 to 17277. [2021-12-17 04:28:47,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17277 states, 17276 states have (on average 1.1982519101643898) internal successors, (20701), 17276 states have internal predecessors, (20701), 0 states have call successors, (0), 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 04:28:47,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17277 states to 17277 states and 20701 transitions. [2021-12-17 04:28:47,890 INFO L78 Accepts]: Start accepts. Automaton has 17277 states and 20701 transitions. Word has length 240 [2021-12-17 04:28:47,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:28:47,891 INFO L470 AbstractCegarLoop]: Abstraction has 17277 states and 20701 transitions. [2021-12-17 04:28:47,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 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 04:28:47,891 INFO L276 IsEmpty]: Start isEmpty. Operand 17277 states and 20701 transitions. [2021-12-17 04:28:47,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-12-17 04:28:47,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:28:47,895 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:28:47,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 04:28:47,895 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:28:47,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:28:47,896 INFO L85 PathProgramCache]: Analyzing trace with hash 251535971, now seen corresponding path program 1 times [2021-12-17 04:28:47,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:28:47,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962461323] [2021-12-17 04:28:47,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:28:47,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:28:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:28:47,966 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:28:47,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:28:47,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962461323] [2021-12-17 04:28:47,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962461323] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:28:47,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:28:47,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:28:47,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830253252] [2021-12-17 04:28:47,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:28:47,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:28:47,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:28:47,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:28:47,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:28:47,969 INFO L87 Difference]: Start difference. First operand 17277 states and 20701 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 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 04:28:50,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:28:50,251 INFO L93 Difference]: Finished difference Result 33801 states and 40644 transitions. [2021-12-17 04:28:50,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:28:50,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2021-12-17 04:28:50,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:28:50,268 INFO L225 Difference]: With dead ends: 33801 [2021-12-17 04:28:50,268 INFO L226 Difference]: Without dead ends: 17277 [2021-12-17 04:28:50,278 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 04:28:50,278 INFO L933 BasicCegarLoop]: 1296 mSDtfsCounter, 712 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2469 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 2943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 2469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:28:50,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 1304 Invalid, 2943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 2469 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 04:28:50,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17277 states. [2021-12-17 04:28:50,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17277 to 17277. [2021-12-17 04:28:50,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17277 states, 17276 states have (on average 1.1764297291039592) internal successors, (20324), 17276 states have internal predecessors, (20324), 0 states have call successors, (0), 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 04:28:50,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17277 states to 17277 states and 20324 transitions. [2021-12-17 04:28:50,419 INFO L78 Accepts]: Start accepts. Automaton has 17277 states and 20324 transitions. Word has length 244 [2021-12-17 04:28:50,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:28:50,420 INFO L470 AbstractCegarLoop]: Abstraction has 17277 states and 20324 transitions. [2021-12-17 04:28:50,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 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 04:28:50,420 INFO L276 IsEmpty]: Start isEmpty. Operand 17277 states and 20324 transitions. [2021-12-17 04:28:50,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-12-17 04:28:50,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:28:50,422 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:28:50,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 04:28:50,424 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:28:50,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:28:50,424 INFO L85 PathProgramCache]: Analyzing trace with hash -52205525, now seen corresponding path program 1 times [2021-12-17 04:28:50,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:28:50,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828219594] [2021-12-17 04:28:50,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:28:50,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:28:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:28:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-17 04:28:50,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:28:50,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828219594] [2021-12-17 04:28:50,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828219594] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:28:50,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:28:50,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:28:50,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436573949] [2021-12-17 04:28:50,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:28:50,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:28:50,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:28:50,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:28:50,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:28:50,509 INFO L87 Difference]: Start difference. First operand 17277 states and 20324 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 0 states have call successors, (0), 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 04:28:52,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:28:52,866 INFO L93 Difference]: Finished difference Result 45068 states and 53845 transitions. [2021-12-17 04:28:52,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:28:52,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2021-12-17 04:28:52,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:28:52,905 INFO L225 Difference]: With dead ends: 45068 [2021-12-17 04:28:52,906 INFO L226 Difference]: Without dead ends: 28544 [2021-12-17 04:28:52,922 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 04:28:52,924 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 848 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:28:52,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 312 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 04:28:52,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28544 states. [2021-12-17 04:28:53,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28544 to 27040. [2021-12-17 04:28:53,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27040 states, 27039 states have (on average 1.1580679758866823) internal successors, (31313), 27039 states have internal predecessors, (31313), 0 states have call successors, (0), 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 04:28:53,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27040 states to 27040 states and 31313 transitions. [2021-12-17 04:28:53,335 INFO L78 Accepts]: Start accepts. Automaton has 27040 states and 31313 transitions. Word has length 249 [2021-12-17 04:28:53,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:28:53,335 INFO L470 AbstractCegarLoop]: Abstraction has 27040 states and 31313 transitions. [2021-12-17 04:28:53,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 0 states have call successors, (0), 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 04:28:53,335 INFO L276 IsEmpty]: Start isEmpty. Operand 27040 states and 31313 transitions. [2021-12-17 04:28:53,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-12-17 04:28:53,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:28:53,339 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:28:53,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 04:28:53,340 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:28:53,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:28:53,340 INFO L85 PathProgramCache]: Analyzing trace with hash 620761412, now seen corresponding path program 1 times [2021-12-17 04:28:53,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:28:53,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046956660] [2021-12-17 04:28:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:28:53,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:28:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:28:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 04:28:53,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:28:53,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046956660] [2021-12-17 04:28:53,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046956660] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:28:53,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:28:53,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:28:53,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113725581] [2021-12-17 04:28:53,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:28:53,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:28:53,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:28:53,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:28:53,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:28:53,425 INFO L87 Difference]: Start difference. First operand 27040 states and 31313 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 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 04:28:55,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:28:55,332 INFO L93 Difference]: Finished difference Result 63841 states and 75310 transitions. [2021-12-17 04:28:55,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:28:55,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 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 326 [2021-12-17 04:28:55,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:28:55,380 INFO L225 Difference]: With dead ends: 63841 [2021-12-17 04:28:55,380 INFO L226 Difference]: Without dead ends: 37554 [2021-12-17 04:28:55,403 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 04:28:55,406 INFO L933 BasicCegarLoop]: 1208 mSDtfsCounter, 704 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 2693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:28:55,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 1216 Invalid, 2693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 2254 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 04:28:55,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37554 states. [2021-12-17 04:28:55,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37554 to 37554. [2021-12-17 04:28:55,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37554 states, 37553 states have (on average 1.1411871222006231) internal successors, (42855), 37553 states have internal predecessors, (42855), 0 states have call successors, (0), 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 04:28:56,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37554 states to 37554 states and 42855 transitions. [2021-12-17 04:28:56,008 INFO L78 Accepts]: Start accepts. Automaton has 37554 states and 42855 transitions. Word has length 326 [2021-12-17 04:28:56,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:28:56,008 INFO L470 AbstractCegarLoop]: Abstraction has 37554 states and 42855 transitions. [2021-12-17 04:28:56,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 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 04:28:56,009 INFO L276 IsEmpty]: Start isEmpty. Operand 37554 states and 42855 transitions. [2021-12-17 04:28:56,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-12-17 04:28:56,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:28:56,013 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:28:56,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 04:28:56,013 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:28:56,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:28:56,014 INFO L85 PathProgramCache]: Analyzing trace with hash -959516428, now seen corresponding path program 1 times [2021-12-17 04:28:56,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:28:56,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839589061] [2021-12-17 04:28:56,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:28:56,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:28:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:28:56,111 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-17 04:28:56,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:28:56,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839589061] [2021-12-17 04:28:56,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839589061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:28:56,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:28:56,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:28:56,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286144120] [2021-12-17 04:28:56,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:28:56,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:28:56,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:28:56,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:28:56,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:28:56,114 INFO L87 Difference]: Start difference. First operand 37554 states and 42855 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:28:59,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:28:59,057 INFO L93 Difference]: Finished difference Result 106648 states and 122330 transitions. [2021-12-17 04:28:59,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:28:59,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 358 [2021-12-17 04:28:59,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:28:59,133 INFO L225 Difference]: With dead ends: 106648 [2021-12-17 04:28:59,133 INFO L226 Difference]: Without dead ends: 65341 [2021-12-17 04:28:59,156 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 04:28:59,156 INFO L933 BasicCegarLoop]: 1307 mSDtfsCounter, 766 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2234 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 2854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 2234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:28:59,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 1315 Invalid, 2854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 2234 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 04:28:59,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65341 states. [2021-12-17 04:28:59,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65341 to 62337. [2021-12-17 04:28:59,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62337 states, 62336 states have (on average 1.1086851899383983) internal successors, (69111), 62336 states have internal predecessors, (69111), 0 states have call successors, (0), 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 04:28:59,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62337 states to 62337 states and 69111 transitions. [2021-12-17 04:28:59,805 INFO L78 Accepts]: Start accepts. Automaton has 62337 states and 69111 transitions. Word has length 358 [2021-12-17 04:28:59,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:28:59,806 INFO L470 AbstractCegarLoop]: Abstraction has 62337 states and 69111 transitions. [2021-12-17 04:28:59,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:28:59,806 INFO L276 IsEmpty]: Start isEmpty. Operand 62337 states and 69111 transitions. [2021-12-17 04:28:59,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2021-12-17 04:28:59,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:28:59,813 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:28:59,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 04:28:59,813 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:28:59,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:28:59,814 INFO L85 PathProgramCache]: Analyzing trace with hash 622912059, now seen corresponding path program 1 times [2021-12-17 04:28:59,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:28:59,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420781074] [2021-12-17 04:28:59,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:28:59,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:28:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:28:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 491 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-17 04:28:59,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:28:59,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420781074] [2021-12-17 04:28:59,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420781074] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:28:59,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:28:59,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:28:59,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717756860] [2021-12-17 04:28:59,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:28:59,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:28:59,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:28:59,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:28:59,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:28:59,903 INFO L87 Difference]: Start difference. First operand 62337 states and 69111 transitions. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 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 04:29:02,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:29:02,463 INFO L93 Difference]: Finished difference Result 153961 states and 172363 transitions. [2021-12-17 04:29:02,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:29:02,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 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 437 [2021-12-17 04:29:02,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:29:02,692 INFO L225 Difference]: With dead ends: 153961 [2021-12-17 04:29:02,693 INFO L226 Difference]: Without dead ends: 92377 [2021-12-17 04:29:02,715 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 04:29:02,716 INFO L933 BasicCegarLoop]: 1228 mSDtfsCounter, 727 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2115 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 2811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 2115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:29:02,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 1235 Invalid, 2811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 2115 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 04:29:02,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92377 states. [2021-12-17 04:29:03,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92377 to 86369. [2021-12-17 04:29:03,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86369 states, 86368 states have (on average 1.0994118191922935) internal successors, (94954), 86368 states have internal predecessors, (94954), 0 states have call successors, (0), 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 04:29:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86369 states to 86369 states and 94954 transitions. [2021-12-17 04:29:03,696 INFO L78 Accepts]: Start accepts. Automaton has 86369 states and 94954 transitions. Word has length 437 [2021-12-17 04:29:03,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:29:03,696 INFO L470 AbstractCegarLoop]: Abstraction has 86369 states and 94954 transitions. [2021-12-17 04:29:03,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 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 04:29:03,697 INFO L276 IsEmpty]: Start isEmpty. Operand 86369 states and 94954 transitions. [2021-12-17 04:29:03,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2021-12-17 04:29:03,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:29:03,705 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 04:29:03,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 04:29:03,705 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:29:03,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:29:03,706 INFO L85 PathProgramCache]: Analyzing trace with hash -311271560, now seen corresponding path program 1 times [2021-12-17 04:29:03,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:29:03,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806061530] [2021-12-17 04:29:03,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:29:03,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:29:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:29:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-12-17 04:29:03,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:29:03,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806061530] [2021-12-17 04:29:03,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806061530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:29:03,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:29:03,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:29:03,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996264739] [2021-12-17 04:29:03,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:29:03,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:29:03,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:29:03,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:29:03,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:29:03,956 INFO L87 Difference]: Start difference. First operand 86369 states and 94954 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 04:29:06,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:29:06,612 INFO L93 Difference]: Finished difference Result 171985 states and 189150 transitions. [2021-12-17 04:29:06,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:29:06,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 04:29:06,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:29:06,745 INFO L225 Difference]: With dead ends: 171985 [2021-12-17 04:29:06,746 INFO L226 Difference]: Without dead ends: 86369 [2021-12-17 04:29:06,805 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 04:29:06,807 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 791 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2212 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 2708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 2212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:29:06,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 408 Invalid, 2708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 2212 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 04:29:06,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86369 states. [2021-12-17 04:29:07,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86369 to 83365. [2021-12-17 04:29:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83365 states, 83364 states have (on average 1.067763063192745) internal successors, (89013), 83364 states have internal predecessors, (89013), 0 states have call successors, (0), 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 04:29:07,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83365 states to 83365 states and 89013 transitions. [2021-12-17 04:29:07,871 INFO L78 Accepts]: Start accepts. Automaton has 83365 states and 89013 transitions. Word has length 462 [2021-12-17 04:29:07,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:29:07,872 INFO L470 AbstractCegarLoop]: Abstraction has 83365 states and 89013 transitions. [2021-12-17 04:29:07,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 04:29:07,872 INFO L276 IsEmpty]: Start isEmpty. Operand 83365 states and 89013 transitions. [2021-12-17 04:29:07,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2021-12-17 04:29:07,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:29:07,880 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:29:07,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 04:29:07,880 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:29:07,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:29:07,880 INFO L85 PathProgramCache]: Analyzing trace with hash 794556602, now seen corresponding path program 1 times [2021-12-17 04:29:07,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:29:07,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020991820] [2021-12-17 04:29:07,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:29:07,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:29:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:29:07,990 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 519 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-17 04:29:07,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:29:07,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020991820] [2021-12-17 04:29:07,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020991820] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:29:07,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:29:07,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:29:07,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387561703] [2021-12-17 04:29:07,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:29:07,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:29:07,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:29:07,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:29:07,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:29:07,993 INFO L87 Difference]: Start difference. First operand 83365 states and 89013 transitions. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 04:29:11,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:29:11,103 INFO L93 Difference]: Finished difference Result 205029 states and 220012 transitions. [2021-12-17 04:29:11,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:29:11,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 468 [2021-12-17 04:29:11,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:29:11,247 INFO L225 Difference]: With dead ends: 205029 [2021-12-17 04:29:11,248 INFO L226 Difference]: Without dead ends: 122417 [2021-12-17 04:29:11,273 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 04:29:11,274 INFO L933 BasicCegarLoop]: 1294 mSDtfsCounter, 662 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2333 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 2854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 2333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:29:11,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [662 Valid, 1301 Invalid, 2854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 2333 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:29:11,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122417 states. [2021-12-17 04:29:12,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122417 to 114156. [2021-12-17 04:29:12,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114156 states, 114155 states have (on average 1.061390215058473) internal successors, (121163), 114155 states have internal predecessors, (121163), 0 states have call successors, (0), 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 04:29:12,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114156 states to 114156 states and 121163 transitions. [2021-12-17 04:29:12,560 INFO L78 Accepts]: Start accepts. Automaton has 114156 states and 121163 transitions. Word has length 468 [2021-12-17 04:29:12,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:29:12,561 INFO L470 AbstractCegarLoop]: Abstraction has 114156 states and 121163 transitions. [2021-12-17 04:29:12,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 04:29:12,561 INFO L276 IsEmpty]: Start isEmpty. Operand 114156 states and 121163 transitions. [2021-12-17 04:29:12,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2021-12-17 04:29:12,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:29:12,567 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 04:29:12,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 04:29:12,568 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:29:12,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:29:12,568 INFO L85 PathProgramCache]: Analyzing trace with hash 933276794, now seen corresponding path program 1 times [2021-12-17 04:29:12,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:29:12,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077262798] [2021-12-17 04:29:12,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:29:12,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:29:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:29:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 511 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-12-17 04:29:13,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:29:13,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077262798] [2021-12-17 04:29:13,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077262798] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:29:13,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:29:13,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:29:13,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733899264] [2021-12-17 04:29:13,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:29:13,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:29:13,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:29:13,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:29:13,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:29:13,003 INFO L87 Difference]: Start difference. First operand 114156 states and 121163 transitions. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 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 04:29:16,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:29:16,158 INFO L93 Difference]: Finished difference Result 254595 states and 271821 transitions. [2021-12-17 04:29:16,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:29:16,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 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 468 [2021-12-17 04:29:16,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:29:16,352 INFO L225 Difference]: With dead ends: 254595 [2021-12-17 04:29:16,352 INFO L226 Difference]: Without dead ends: 141192 [2021-12-17 04:29:16,397 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 04:29:16,398 INFO L933 BasicCegarLoop]: 1275 mSDtfsCounter, 668 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2240 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 2689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 2240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:29:16,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 1283 Invalid, 2689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 2240 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 04:29:16,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141192 states. [2021-12-17 04:29:17,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141192 to 138188. [2021-12-17 04:29:18,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138188 states, 138187 states have (on average 1.0554031855384371) internal successors, (145843), 138187 states have internal predecessors, (145843), 0 states have call successors, (0), 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 04:29:18,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138188 states to 138188 states and 145843 transitions. [2021-12-17 04:29:18,198 INFO L78 Accepts]: Start accepts. Automaton has 138188 states and 145843 transitions. Word has length 468 [2021-12-17 04:29:18,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:29:18,199 INFO L470 AbstractCegarLoop]: Abstraction has 138188 states and 145843 transitions. [2021-12-17 04:29:18,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 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 04:29:18,199 INFO L276 IsEmpty]: Start isEmpty. Operand 138188 states and 145843 transitions. [2021-12-17 04:29:18,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2021-12-17 04:29:18,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:29:18,210 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:29:18,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 04:29:18,210 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:29:18,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:29:18,211 INFO L85 PathProgramCache]: Analyzing trace with hash -358846113, now seen corresponding path program 1 times [2021-12-17 04:29:18,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:29:18,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736198315] [2021-12-17 04:29:18,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:29:18,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:29:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:29:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 318 proven. 240 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-17 04:29:18,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:29:18,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736198315] [2021-12-17 04:29:18,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736198315] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:29:18,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789035147] [2021-12-17 04:29:18,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:29:18,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:29:18,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:29:18,689 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 04:29:18,689 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 04:29:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:29:18,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:29:18,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:29:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-12-17 04:29:19,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:29:19,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789035147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:29:19,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:29:19,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-17 04:29:19,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778217364] [2021-12-17 04:29:19,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:29:19,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:29:19,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:29:19,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:29:19,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:29:19,471 INFO L87 Difference]: Start difference. First operand 138188 states and 145843 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 04:29:22,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:29:22,631 INFO L93 Difference]: Finished difference Result 295149 states and 311584 transitions. [2021-12-17 04:29:22,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:29:22,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 522 [2021-12-17 04:29:22,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:29:22,829 INFO L225 Difference]: With dead ends: 295149 [2021-12-17 04:29:22,829 INFO L226 Difference]: Without dead ends: 157714 [2021-12-17 04:29:22,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:29:22,876 INFO L933 BasicCegarLoop]: 1109 mSDtfsCounter, 847 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 2591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:29:22,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [847 Valid, 1117 Invalid, 2591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 04:29:23,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157714 states. [2021-12-17 04:29:24,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157714 to 155461. [2021-12-17 04:29:24,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155461 states, 155460 states have (on average 1.0508104978772674) internal successors, (163359), 155460 states have internal predecessors, (163359), 0 states have call successors, (0), 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 04:29:24,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155461 states to 155461 states and 163359 transitions. [2021-12-17 04:29:24,764 INFO L78 Accepts]: Start accepts. Automaton has 155461 states and 163359 transitions. Word has length 522 [2021-12-17 04:29:24,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:29:24,765 INFO L470 AbstractCegarLoop]: Abstraction has 155461 states and 163359 transitions. [2021-12-17 04:29:24,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 04:29:24,766 INFO L276 IsEmpty]: Start isEmpty. Operand 155461 states and 163359 transitions. [2021-12-17 04:29:24,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 706 [2021-12-17 04:29:24,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:29:24,788 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:29:24,805 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 04:29:25,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-17 04:29:25,005 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:29:25,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:29:25,005 INFO L85 PathProgramCache]: Analyzing trace with hash -203305531, now seen corresponding path program 1 times [2021-12-17 04:29:25,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:29:25,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999301619] [2021-12-17 04:29:25,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:29:25,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:29:25,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:29:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 371 proven. 360 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-17 04:29:25,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:29:25,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999301619] [2021-12-17 04:29:25,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999301619] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:29:25,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441815472] [2021-12-17 04:29:25,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:29:25,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:29:25,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:29:25,272 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 04:29:25,274 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 04:29:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:29:25,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 04:29:25,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:29:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 512 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-12-17 04:29:27,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:29:27,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441815472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:29:27,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:29:27,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-17 04:29:27,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321716876] [2021-12-17 04:29:27,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:29:27,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:29:27,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:29:27,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:29:27,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:29:27,281 INFO L87 Difference]: Start difference. First operand 155461 states and 163359 transitions. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 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 04:29:29,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:29:29,978 INFO L93 Difference]: Finished difference Result 310920 states and 326717 transitions. [2021-12-17 04:29:29,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:29:29,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 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 705 [2021-12-17 04:29:29,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:29:30,166 INFO L225 Difference]: With dead ends: 310920 [2021-12-17 04:29:30,167 INFO L226 Difference]: Without dead ends: 153959 [2021-12-17 04:29:30,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 705 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:29:30,219 INFO L933 BasicCegarLoop]: 1335 mSDtfsCounter, 504 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1985 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 2199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:29:30,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 1342 Invalid, 2199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1985 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 04:29:30,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153959 states. [2021-12-17 04:29:31,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153959 to 141192. [2021-12-17 04:29:31,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141192 states, 141191 states have (on average 1.0450311988724494) internal successors, (147549), 141191 states have internal predecessors, (147549), 0 states have call successors, (0), 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 04:29:32,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141192 states to 141192 states and 147549 transitions. [2021-12-17 04:29:32,054 INFO L78 Accepts]: Start accepts. Automaton has 141192 states and 147549 transitions. Word has length 705 [2021-12-17 04:29:32,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:29:32,054 INFO L470 AbstractCegarLoop]: Abstraction has 141192 states and 147549 transitions. [2021-12-17 04:29:32,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 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 04:29:32,054 INFO L276 IsEmpty]: Start isEmpty. Operand 141192 states and 147549 transitions. [2021-12-17 04:29:32,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2021-12-17 04:29:32,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:29:32,076 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 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] [2021-12-17 04:29:32,095 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 04:29:32,293 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,SelfDestructingSolverStorable16 [2021-12-17 04:29:32,293 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:29:32,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:29:32,294 INFO L85 PathProgramCache]: Analyzing trace with hash 571713711, now seen corresponding path program 1 times [2021-12-17 04:29:32,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:29:32,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814865731] [2021-12-17 04:29:32,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:29:32,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:29:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:29:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 508 proven. 25 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-12-17 04:29:32,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:29:32,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814865731] [2021-12-17 04:29:32,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814865731] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:29:32,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953464795] [2021-12-17 04:29:32,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:29:32,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:29:32,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:29:32,585 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 04:29:32,586 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 04:29:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:29:32,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:29:32,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:29:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 533 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-12-17 04:29:33,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:29:33,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953464795] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:29:33,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:29:33,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-17 04:29:33,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460466603] [2021-12-17 04:29:33,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:29:33,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:29:33,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:29:33,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:29:33,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:29:33,603 INFO L87 Difference]: Start difference. First operand 141192 states and 147549 transitions. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 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 04:29:35,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:29:35,985 INFO L93 Difference]: Finished difference Result 283884 states and 296637 transitions. [2021-12-17 04:29:35,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:29:35,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 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 726 [2021-12-17 04:29:35,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:29:36,159 INFO L225 Difference]: With dead ends: 283884 [2021-12-17 04:29:36,159 INFO L226 Difference]: Without dead ends: 140441 [2021-12-17 04:29:36,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 726 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:29:36,251 INFO L933 BasicCegarLoop]: 1286 mSDtfsCounter, 522 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 2243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:29:36,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 1293 Invalid, 2243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1940 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-17 04:29:36,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140441 states. [2021-12-17 04:29:37,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140441 to 135184. [2021-12-17 04:29:37,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135184 states, 135183 states have (on average 1.0433190563902266) internal successors, (141039), 135183 states have internal predecessors, (141039), 0 states have call successors, (0), 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 04:29:38,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135184 states to 135184 states and 141039 transitions. [2021-12-17 04:29:38,324 INFO L78 Accepts]: Start accepts. Automaton has 135184 states and 141039 transitions. Word has length 726 [2021-12-17 04:29:38,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:29:38,325 INFO L470 AbstractCegarLoop]: Abstraction has 135184 states and 141039 transitions. [2021-12-17 04:29:38,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 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 04:29:38,325 INFO L276 IsEmpty]: Start isEmpty. Operand 135184 states and 141039 transitions. [2021-12-17 04:29:38,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 756 [2021-12-17 04:29:38,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:29:38,350 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:29:38,369 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 04:29:38,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 04:29:38,556 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:29:38,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:29:38,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1445452210, now seen corresponding path program 1 times [2021-12-17 04:29:38,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:29:38,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209146744] [2021-12-17 04:29:38,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:29:38,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:29:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:29:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 562 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-12-17 04:29:38,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:29:38,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209146744] [2021-12-17 04:29:38,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209146744] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:29:38,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:29:38,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 04:29:38,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300396739] [2021-12-17 04:29:38,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:29:38,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:29:38,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:29:38,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:29:38,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:29:38,799 INFO L87 Difference]: Start difference. First operand 135184 states and 141039 transitions. Second operand has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 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 04:29:41,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:29:41,819 INFO L93 Difference]: Finished difference Result 270002 states and 281707 transitions. [2021-12-17 04:29:41,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 04:29:41,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 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 755 [2021-12-17 04:29:41,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:29:42,007 INFO L225 Difference]: With dead ends: 270002 [2021-12-17 04:29:42,008 INFO L226 Difference]: Without dead ends: 135571 [2021-12-17 04:29:42,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:29:42,078 INFO L933 BasicCegarLoop]: 1329 mSDtfsCounter, 1118 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3333 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1118 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 3647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 3333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:29:42,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1118 Valid, 1346 Invalid, 3647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 3333 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 04:29:42,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135571 states. [2021-12-17 04:29:43,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135571 to 135184. [2021-12-17 04:29:43,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135184 states, 135183 states have (on average 1.0430971349947848) internal successors, (141009), 135183 states have internal predecessors, (141009), 0 states have call successors, (0), 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 04:29:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135184 states to 135184 states and 141009 transitions. [2021-12-17 04:29:43,699 INFO L78 Accepts]: Start accepts. Automaton has 135184 states and 141009 transitions. Word has length 755 [2021-12-17 04:29:43,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:29:43,699 INFO L470 AbstractCegarLoop]: Abstraction has 135184 states and 141009 transitions. [2021-12-17 04:29:43,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 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 04:29:43,700 INFO L276 IsEmpty]: Start isEmpty. Operand 135184 states and 141009 transitions. [2021-12-17 04:29:44,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2021-12-17 04:29:44,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:29:44,108 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:29:44,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 04:29:44,109 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:29:44,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:29:44,109 INFO L85 PathProgramCache]: Analyzing trace with hash 563546646, now seen corresponding path program 1 times [2021-12-17 04:29:44,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:29:44,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564768110] [2021-12-17 04:29:44,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:29:44,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:29:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:29:44,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 1106 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-17 04:29:44,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:29:44,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564768110] [2021-12-17 04:29:44,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564768110] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:29:44,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:29:44,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 04:29:44,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702539180] [2021-12-17 04:29:44,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:29:44,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:29:44,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:29:44,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:29:44,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:29:44,321 INFO L87 Difference]: Start difference. First operand 135184 states and 141009 transitions. Second operand has 4 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 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 04:29:47,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:29:47,837 INFO L93 Difference]: Finished difference Result 277876 states and 289702 transitions. [2021-12-17 04:29:47,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:29:47,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 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 821 [2021-12-17 04:29:47,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:29:48,034 INFO L225 Difference]: With dead ends: 277876 [2021-12-17 04:29:48,035 INFO L226 Difference]: Without dead ends: 143445 [2021-12-17 04:29:48,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:29:48,084 INFO L933 BasicCegarLoop]: 1299 mSDtfsCounter, 1237 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 5285 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 1320 SdHoareTripleChecker+Invalid, 5484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 5285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:29:48,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1237 Valid, 1320 Invalid, 5484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 5285 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:29:48,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143445 states. [2021-12-17 04:29:49,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143445 to 142694. [2021-12-17 04:29:49,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142694 states, 142693 states have (on average 1.040072042777151) internal successors, (148411), 142693 states have internal predecessors, (148411), 0 states have call successors, (0), 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 04:29:49,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142694 states to 142694 states and 148411 transitions. [2021-12-17 04:29:49,579 INFO L78 Accepts]: Start accepts. Automaton has 142694 states and 148411 transitions. Word has length 821 [2021-12-17 04:29:49,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:29:49,579 INFO L470 AbstractCegarLoop]: Abstraction has 142694 states and 148411 transitions. [2021-12-17 04:29:49,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 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 04:29:49,580 INFO L276 IsEmpty]: Start isEmpty. Operand 142694 states and 148411 transitions. [2021-12-17 04:29:49,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2021-12-17 04:29:49,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:29:49,605 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:29:49,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 04:29:49,605 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:29:49,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:29:49,605 INFO L85 PathProgramCache]: Analyzing trace with hash 858780542, now seen corresponding path program 1 times [2021-12-17 04:29:49,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:29:49,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37494887] [2021-12-17 04:29:49,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:29:49,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:29:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:29:50,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1263 backedges. 861 proven. 0 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-12-17 04:29:50,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:29:50,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37494887] [2021-12-17 04:29:50,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37494887] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:29:50,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:29:50,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:29:50,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983447487] [2021-12-17 04:29:50,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:29:50,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:29:50,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:29:50,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:29:50,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:29:50,505 INFO L87 Difference]: Start difference. First operand 142694 states and 148411 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)