./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.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 4c1c75af712a533da82a30f57ac2b06c69482506da4a6eea9cce6cb2a2958856 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 12:01:59,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 12:01:59,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 12:01:59,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 12:01:59,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 12:01:59,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 12:01:59,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 12:01:59,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 12:01:59,714 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 12:01:59,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 12:01:59,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 12:01:59,717 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 12:01:59,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 12:01:59,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 12:01:59,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 12:01:59,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 12:01:59,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 12:01:59,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 12:01:59,728 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 12:01:59,729 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 12:01:59,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 12:01:59,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 12:01:59,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 12:01:59,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 12:01:59,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 12:01:59,749 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 12:01:59,749 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 12:01:59,749 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 12:01:59,750 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 12:01:59,750 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 12:01:59,751 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 12:01:59,751 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 12:01:59,752 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 12:01:59,752 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 12:01:59,753 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 12:01:59,753 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 12:01:59,754 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 12:01:59,754 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 12:01:59,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 12:01:59,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 12:01:59,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 12:01:59,756 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 12:01:59,775 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 12:01:59,776 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 12:01:59,776 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 12:01:59,776 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 12:01:59,776 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 12:01:59,777 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 12:01:59,777 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 12:01:59,777 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 12:01:59,777 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 12:01:59,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 12:01:59,777 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 12:01:59,777 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 12:01:59,778 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 12:01:59,778 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 12:01:59,778 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 12:01:59,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 12:01:59,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 12:01:59,778 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 12:01:59,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 12:01:59,778 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 12:01:59,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 12:01:59,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 12:01:59,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 12:01:59,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 12:01:59,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:01:59,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 12:01:59,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 12:01:59,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 12:01:59,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 12:01:59,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 12:01:59,781 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 12:01:59,781 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 12:01:59,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 12:01:59,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 12:01:59,781 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c1c75af712a533da82a30f57ac2b06c69482506da4a6eea9cce6cb2a2958856 [2021-12-15 12:01:59,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 12:02:00,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 12:02:00,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 12:02:00,006 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 12:02:00,007 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 12:02:00,008 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2021-12-15 12:02:00,070 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/158a0c780/e5f9ee81feae42f5bbd04e29c0f60fc7/FLAGaa14bbb05 [2021-12-15 12:02:00,694 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 12:02:00,695 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2021-12-15 12:02:00,722 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/158a0c780/e5f9ee81feae42f5bbd04e29c0f60fc7/FLAGaa14bbb05 [2021-12-15 12:02:01,099 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/158a0c780/e5f9ee81feae42f5bbd04e29c0f60fc7 [2021-12-15 12:02:01,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 12:02:01,104 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 12:02:01,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 12:02:01,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 12:02:01,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 12:02:01,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:02:01" (1/1) ... [2021-12-15 12:02:01,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@672e0578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:01, skipping insertion in model container [2021-12-15 12:02:01,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:02:01" (1/1) ... [2021-12-15 12:02:01,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 12:02:01,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 12:02:01,629 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/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c[8749,8762] [2021-12-15 12:02:01,682 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/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c[14304,14317] [2021-12-15 12:02:02,107 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:02:02,114 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 12:02:02,145 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/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c[8749,8762] [2021-12-15 12:02:02,150 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/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c[14304,14317] [2021-12-15 12:02:02,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:02:02,437 INFO L208 MainTranslator]: Completed translation [2021-12-15 12:02:02,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:02 WrapperNode [2021-12-15 12:02:02,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 12:02:02,439 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 12:02:02,439 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 12:02:02,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 12:02:02,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:02" (1/1) ... [2021-12-15 12:02:02,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:02" (1/1) ... [2021-12-15 12:02:02,691 INFO L137 Inliner]: procedures = 36, calls = 21, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 5032 [2021-12-15 12:02:02,692 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 12:02:02,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 12:02:02,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 12:02:02,693 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 12:02:02,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:02" (1/1) ... [2021-12-15 12:02:02,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:02" (1/1) ... [2021-12-15 12:02:02,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:02" (1/1) ... [2021-12-15 12:02:02,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:02" (1/1) ... [2021-12-15 12:02:02,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:02" (1/1) ... [2021-12-15 12:02:02,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:02" (1/1) ... [2021-12-15 12:02:03,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:02" (1/1) ... [2021-12-15 12:02:03,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 12:02:03,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 12:02:03,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 12:02:03,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 12:02:03,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:02" (1/1) ... [2021-12-15 12:02:03,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:02:03,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:02:03,185 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) [2021-12-15 12:02:03,203 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 [2021-12-15 12:02:03,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 12:02:03,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 12:02:03,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 12:02:03,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 12:02:03,290 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 12:02:03,292 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 12:02:06,098 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 12:02:06,108 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 12:02:06,108 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 12:02:06,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:02:06 BoogieIcfgContainer [2021-12-15 12:02:06,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 12:02:06,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 12:02:06,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 12:02:06,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 12:02:06,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 12:02:01" (1/3) ... [2021-12-15 12:02:06,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b6ccac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:02:06, skipping insertion in model container [2021-12-15 12:02:06,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:02" (2/3) ... [2021-12-15 12:02:06,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b6ccac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:02:06, skipping insertion in model container [2021-12-15 12:02:06,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:02:06" (3/3) ... [2021-12-15 12:02:06,116 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2021-12-15 12:02:06,119 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 12:02:06,119 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 12:02:06,162 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 12:02:06,167 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 [2021-12-15 12:02:06,167 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 12:02:06,198 INFO L276 IsEmpty]: Start isEmpty. Operand has 895 states, 892 states have (on average 1.9013452914798206) internal successors, (1696), 894 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:06,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 12:02:06,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:06,204 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:02:06,207 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:06,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:06,213 INFO L85 PathProgramCache]: Analyzing trace with hash 2085104645, now seen corresponding path program 1 times [2021-12-15 12:02:06,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:06,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864638783] [2021-12-15 12:02:06,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:06,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:06,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:06,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864638783] [2021-12-15 12:02:06,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864638783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:06,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:06,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 12:02:06,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997950903] [2021-12-15 12:02:06,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:06,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 12:02:06,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:06,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 12:02:06,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 12:02:06,428 INFO L87 Difference]: Start difference. First operand has 895 states, 892 states have (on average 1.9013452914798206) internal successors, (1696), 894 states have internal predecessors, (1696), 0 states have call successors, (0), 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 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:06,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:06,492 INFO L93 Difference]: Finished difference Result 1759 states and 3336 transitions. [2021-12-15 12:02:06,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 12:02:06,494 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-12-15 12:02:06,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:06,510 INFO L225 Difference]: With dead ends: 1759 [2021-12-15 12:02:06,510 INFO L226 Difference]: Without dead ends: 829 [2021-12-15 12:02:06,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 12:02:06,521 INFO L933 BasicCegarLoop]: 1627 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1627 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:06,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1627 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:06,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-12-15 12:02:06,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 829. [2021-12-15 12:02:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.8899637243047158) internal successors, (1563), 828 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:06,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1563 transitions. [2021-12-15 12:02:06,600 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1563 transitions. Word has length 30 [2021-12-15 12:02:06,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:06,601 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 1563 transitions. [2021-12-15 12:02:06,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:06,601 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1563 transitions. [2021-12-15 12:02:06,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 12:02:06,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:06,603 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:02:06,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 12:02:06,603 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:06,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:06,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2021-12-15 12:02:06,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:06,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452063191] [2021-12-15 12:02:06,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:06,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:06,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:06,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452063191] [2021-12-15 12:02:06,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452063191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:06,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:06,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:02:06,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2631873] [2021-12-15 12:02:06,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:06,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 12:02:06,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:06,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 12:02:06,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 12:02:06,729 INFO L87 Difference]: Start difference. First operand 829 states and 1563 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:06,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:06,792 INFO L93 Difference]: Finished difference Result 879 states and 1639 transitions. [2021-12-15 12:02:06,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 12:02:06,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-12-15 12:02:06,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:06,796 INFO L225 Difference]: With dead ends: 879 [2021-12-15 12:02:06,796 INFO L226 Difference]: Without dead ends: 829 [2021-12-15 12:02:06,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:02:06,800 INFO L933 BasicCegarLoop]: 1561 mSDtfsCounter, 3 mSDsluCounter, 4657 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6218 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:06,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6218 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:06,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-12-15 12:02:06,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 829. [2021-12-15 12:02:06,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.8621523579201935) internal successors, (1540), 828 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:06,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1540 transitions. [2021-12-15 12:02:06,813 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1540 transitions. Word has length 30 [2021-12-15 12:02:06,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:06,814 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 1540 transitions. [2021-12-15 12:02:06,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:06,815 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1540 transitions. [2021-12-15 12:02:06,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-15 12:02:06,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:06,821 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:02:06,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 12:02:06,821 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:06,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:06,822 INFO L85 PathProgramCache]: Analyzing trace with hash 700328821, now seen corresponding path program 1 times [2021-12-15 12:02:06,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:06,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643993333] [2021-12-15 12:02:06,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:06,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:06,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:06,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643993333] [2021-12-15 12:02:06,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643993333] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:06,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:06,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 12:02:06,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750080322] [2021-12-15 12:02:06,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:06,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:02:06,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:06,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:02:06,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:02:06,906 INFO L87 Difference]: Start difference. First operand 829 states and 1540 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:09,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:09,629 INFO L93 Difference]: Finished difference Result 2333 states and 4413 transitions. [2021-12-15 12:02:09,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:02:09,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-12-15 12:02:09,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:09,635 INFO L225 Difference]: With dead ends: 2333 [2021-12-15 12:02:09,646 INFO L226 Difference]: Without dead ends: 1580 [2021-12-15 12:02:09,648 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 [2021-12-15 12:02:09,649 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 868 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2277 mSolverCounterSat, 998 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 3275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 998 IncrementalHoareTripleChecker+Valid, 2277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:09,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 178 Invalid, 3275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [998 Valid, 2277 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 12:02:09,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2021-12-15 12:02:09,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1580. [2021-12-15 12:02:09,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1578 states have (on average 1.847275031685678) internal successors, (2915), 1579 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:09,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 2915 transitions. [2021-12-15 12:02:09,743 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 2915 transitions. Word has length 48 [2021-12-15 12:02:09,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:09,744 INFO L470 AbstractCegarLoop]: Abstraction has 1580 states and 2915 transitions. [2021-12-15 12:02:09,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:09,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 2915 transitions. [2021-12-15 12:02:09,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-15 12:02:09,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:09,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:02:09,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 12:02:09,748 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:09,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:09,750 INFO L85 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2021-12-15 12:02:09,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:09,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707652611] [2021-12-15 12:02:09,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:09,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:09,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:09,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707652611] [2021-12-15 12:02:09,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707652611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:09,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:09,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 12:02:09,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725438596] [2021-12-15 12:02:09,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:09,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:02:09,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:09,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:02:09,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:02:09,895 INFO L87 Difference]: Start difference. First operand 1580 states and 2915 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:10,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:10,058 INFO L93 Difference]: Finished difference Result 1948 states and 3491 transitions. [2021-12-15 12:02:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 12:02:10,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-15 12:02:10,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:10,065 INFO L225 Difference]: With dead ends: 1948 [2021-12-15 12:02:10,065 INFO L226 Difference]: Without dead ends: 1902 [2021-12-15 12:02:10,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-15 12:02:10,075 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 6574 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6574 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:10,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6574 Valid, 2078 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:02:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2021-12-15 12:02:10,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1624. [2021-12-15 12:02:10,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1622 states have (on average 1.8397040690505548) internal successors, (2984), 1623 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:10,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2984 transitions. [2021-12-15 12:02:10,113 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2984 transitions. Word has length 52 [2021-12-15 12:02:10,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:10,115 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 2984 transitions. [2021-12-15 12:02:10,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:10,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2984 transitions. [2021-12-15 12:02:10,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-15 12:02:10,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:10,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:02:10,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 12:02:10,116 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:10,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:10,117 INFO L85 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2021-12-15 12:02:10,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:10,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402901453] [2021-12-15 12:02:10,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:10,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:10,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:10,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:10,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402901453] [2021-12-15 12:02:10,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402901453] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:10,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:10,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:02:10,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640717930] [2021-12-15 12:02:10,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:10,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:02:10,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:10,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:02:10,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:02:10,149 INFO L87 Difference]: Start difference. First operand 1624 states and 2984 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:10,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:10,175 INFO L93 Difference]: Finished difference Result 1793 states and 3247 transitions. [2021-12-15 12:02:10,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:02:10,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-15 12:02:10,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:10,181 INFO L225 Difference]: With dead ends: 1793 [2021-12-15 12:02:10,181 INFO L226 Difference]: Without dead ends: 1703 [2021-12-15 12:02:10,182 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 [2021-12-15 12:02:10,182 INFO L933 BasicCegarLoop]: 1536 mSDtfsCounter, 1480 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:10,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 1601 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:10,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-12-15 12:02:10,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1699. [2021-12-15 12:02:10,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1697 states have (on average 1.8255745433117265) internal successors, (3098), 1698 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:10,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 3098 transitions. [2021-12-15 12:02:10,255 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 3098 transitions. Word has length 54 [2021-12-15 12:02:10,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:10,255 INFO L470 AbstractCegarLoop]: Abstraction has 1699 states and 3098 transitions. [2021-12-15 12:02:10,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:10,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 3098 transitions. [2021-12-15 12:02:10,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-15 12:02:10,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:10,256 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:02:10,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 12:02:10,257 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:10,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:10,257 INFO L85 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2021-12-15 12:02:10,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:10,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68780436] [2021-12-15 12:02:10,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:10,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:10,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:10,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68780436] [2021-12-15 12:02:10,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68780436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:10,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:10,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 12:02:10,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372597445] [2021-12-15 12:02:10,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:10,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:02:10,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:10,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:02:10,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:02:10,361 INFO L87 Difference]: Start difference. First operand 1699 states and 3098 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:10,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:10,456 INFO L93 Difference]: Finished difference Result 1866 states and 3354 transitions. [2021-12-15 12:02:10,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 12:02:10,457 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-15 12:02:10,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:10,463 INFO L225 Difference]: With dead ends: 1866 [2021-12-15 12:02:10,464 INFO L226 Difference]: Without dead ends: 1701 [2021-12-15 12:02:10,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:02:10,465 INFO L933 BasicCegarLoop]: 1540 mSDtfsCounter, 1593 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1593 SdHoareTripleChecker+Valid, 1814 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:10,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1593 Valid, 1814 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:10,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2021-12-15 12:02:10,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1699. [2021-12-15 12:02:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1697 states have (on average 1.8243959929286977) internal successors, (3096), 1698 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:10,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 3096 transitions. [2021-12-15 12:02:10,498 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 3096 transitions. Word has length 54 [2021-12-15 12:02:10,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:10,498 INFO L470 AbstractCegarLoop]: Abstraction has 1699 states and 3096 transitions. [2021-12-15 12:02:10,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:10,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 3096 transitions. [2021-12-15 12:02:10,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-15 12:02:10,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:10,499 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:02:10,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 12:02:10,499 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:10,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:10,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2021-12-15 12:02:10,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:10,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756855339] [2021-12-15 12:02:10,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:10,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:10,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:10,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756855339] [2021-12-15 12:02:10,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756855339] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:10,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:10,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:02:10,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121205017] [2021-12-15 12:02:10,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:10,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:02:10,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:10,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:02:10,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:02:10,542 INFO L87 Difference]: Start difference. First operand 1699 states and 3096 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:10,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:10,571 INFO L93 Difference]: Finished difference Result 2005 states and 3562 transitions. [2021-12-15 12:02:10,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:02:10,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-15 12:02:10,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:10,578 INFO L225 Difference]: With dead ends: 2005 [2021-12-15 12:02:10,578 INFO L226 Difference]: Without dead ends: 1840 [2021-12-15 12:02:10,579 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 [2021-12-15 12:02:10,580 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 1489 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:10,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1489 Valid, 1639 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:10,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-12-15 12:02:10,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1838. [2021-12-15 12:02:10,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1836 states have (on average 1.7995642701525054) internal successors, (3304), 1837 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:10,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 3304 transitions. [2021-12-15 12:02:10,617 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 3304 transitions. Word has length 54 [2021-12-15 12:02:10,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:10,617 INFO L470 AbstractCegarLoop]: Abstraction has 1838 states and 3304 transitions. [2021-12-15 12:02:10,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:10,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 3304 transitions. [2021-12-15 12:02:10,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-15 12:02:10,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:10,618 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:02:10,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 12:02:10,619 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:10,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:10,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2021-12-15 12:02:10,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:10,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340468863] [2021-12-15 12:02:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:10,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:10,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:10,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340468863] [2021-12-15 12:02:10,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340468863] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:10,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:10,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:02:10,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240599497] [2021-12-15 12:02:10,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:10,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:02:10,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:10,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:02:10,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:02:10,658 INFO L87 Difference]: Start difference. First operand 1838 states and 3304 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:10,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:10,688 INFO L93 Difference]: Finished difference Result 2398 states and 4146 transitions. [2021-12-15 12:02:10,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:02:10,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-15 12:02:10,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:10,695 INFO L225 Difference]: With dead ends: 2398 [2021-12-15 12:02:10,695 INFO L226 Difference]: Without dead ends: 2094 [2021-12-15 12:02:10,697 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 [2021-12-15 12:02:10,698 INFO L933 BasicCegarLoop]: 1570 mSDtfsCounter, 1493 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 1648 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:10,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1493 Valid, 1648 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:10,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2021-12-15 12:02:10,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 2092. [2021-12-15 12:02:10,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2090 states have (on average 1.7588516746411482) internal successors, (3676), 2091 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:10,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 3676 transitions. [2021-12-15 12:02:10,737 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 3676 transitions. Word has length 54 [2021-12-15 12:02:10,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:10,738 INFO L470 AbstractCegarLoop]: Abstraction has 2092 states and 3676 transitions. [2021-12-15 12:02:10,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:10,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 3676 transitions. [2021-12-15 12:02:10,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-15 12:02:10,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:10,740 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:02:10,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 12:02:10,740 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:10,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:10,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2021-12-15 12:02:10,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:10,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412899800] [2021-12-15 12:02:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:10,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:10,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:10,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412899800] [2021-12-15 12:02:10,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412899800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:10,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:10,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:02:10,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395655562] [2021-12-15 12:02:10,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:10,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:02:10,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:10,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:02:10,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:02:10,779 INFO L87 Difference]: Start difference. First operand 2092 states and 3676 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:10,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:10,816 INFO L93 Difference]: Finished difference Result 3112 states and 5182 transitions. [2021-12-15 12:02:10,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:02:10,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-15 12:02:10,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:10,824 INFO L225 Difference]: With dead ends: 3112 [2021-12-15 12:02:10,824 INFO L226 Difference]: Without dead ends: 2554 [2021-12-15 12:02:10,825 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 [2021-12-15 12:02:10,825 INFO L933 BasicCegarLoop]: 1583 mSDtfsCounter, 1497 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1497 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:10,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1497 Valid, 1657 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:10,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2021-12-15 12:02:10,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 2552. [2021-12-15 12:02:10,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2550 states have (on average 1.6988235294117646) internal successors, (4332), 2551 states have internal predecessors, (4332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:10,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 4332 transitions. [2021-12-15 12:02:10,873 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 4332 transitions. Word has length 54 [2021-12-15 12:02:10,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:10,874 INFO L470 AbstractCegarLoop]: Abstraction has 2552 states and 4332 transitions. [2021-12-15 12:02:10,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:10,874 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 4332 transitions. [2021-12-15 12:02:10,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-15 12:02:10,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:10,875 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:02:10,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 12:02:10,875 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:10,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:10,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2021-12-15 12:02:10,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:10,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163961806] [2021-12-15 12:02:10,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:10,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:10,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:10,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163961806] [2021-12-15 12:02:10,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163961806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:10,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:10,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:02:10,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899914448] [2021-12-15 12:02:10,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:10,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:02:10,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:10,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:02:10,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:02:10,943 INFO L87 Difference]: Start difference. First operand 2552 states and 4332 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:11,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:11,155 INFO L93 Difference]: Finished difference Result 3322 states and 5433 transitions. [2021-12-15 12:02:11,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 12:02:11,156 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-12-15 12:02:11,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:11,169 INFO L225 Difference]: With dead ends: 3322 [2021-12-15 12:02:11,169 INFO L226 Difference]: Without dead ends: 3320 [2021-12-15 12:02:11,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-15 12:02:11,170 INFO L933 BasicCegarLoop]: 1577 mSDtfsCounter, 498 mSDsluCounter, 9002 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 10579 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:11,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 10579 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:11,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3320 states. [2021-12-15 12:02:11,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3320 to 2600. [2021-12-15 12:02:11,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2598 states have (on average 1.682832948421863) internal successors, (4372), 2599 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:11,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 4372 transitions. [2021-12-15 12:02:11,253 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 4372 transitions. Word has length 55 [2021-12-15 12:02:11,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:11,253 INFO L470 AbstractCegarLoop]: Abstraction has 2600 states and 4372 transitions. [2021-12-15 12:02:11,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:11,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 4372 transitions. [2021-12-15 12:02:11,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-15 12:02:11,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:11,255 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:02:11,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 12:02:11,255 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:11,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:11,256 INFO L85 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2021-12-15 12:02:11,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:11,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553697516] [2021-12-15 12:02:11,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:11,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:11,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:11,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:11,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553697516] [2021-12-15 12:02:11,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553697516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:11,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:11,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:02:11,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562579770] [2021-12-15 12:02:11,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:11,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:02:11,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:11,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:02:11,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:02:11,282 INFO L87 Difference]: Start difference. First operand 2600 states and 4372 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:11,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:11,354 INFO L93 Difference]: Finished difference Result 3695 states and 5962 transitions. [2021-12-15 12:02:11,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:02:11,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-12-15 12:02:11,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:11,363 INFO L225 Difference]: With dead ends: 3695 [2021-12-15 12:02:11,363 INFO L226 Difference]: Without dead ends: 3084 [2021-12-15 12:02:11,364 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 [2021-12-15 12:02:11,365 INFO L933 BasicCegarLoop]: 1591 mSDtfsCounter, 1498 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:11,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1661 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:11,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2021-12-15 12:02:11,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 3082. [2021-12-15 12:02:11,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3082 states, 3080 states have (on average 1.6383116883116884) internal successors, (5046), 3081 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:11,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 5046 transitions. [2021-12-15 12:02:11,462 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 5046 transitions. Word has length 56 [2021-12-15 12:02:11,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:11,462 INFO L470 AbstractCegarLoop]: Abstraction has 3082 states and 5046 transitions. [2021-12-15 12:02:11,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:11,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 5046 transitions. [2021-12-15 12:02:11,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 12:02:11,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:11,465 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 12:02:11,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 12:02:11,465 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:11,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:11,466 INFO L85 PathProgramCache]: Analyzing trace with hash 457839235, now seen corresponding path program 1 times [2021-12-15 12:02:11,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:11,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243887193] [2021-12-15 12:02:11,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:11,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:11,513 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-15 12:02:11,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:11,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243887193] [2021-12-15 12:02:11,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243887193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:11,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:11,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 12:02:11,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550652374] [2021-12-15 12:02:11,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:11,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:02:11,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:11,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:02:11,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:02:11,515 INFO L87 Difference]: Start difference. First operand 3082 states and 5046 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:11,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:11,814 INFO L93 Difference]: Finished difference Result 9588 states and 14287 transitions. [2021-12-15 12:02:11,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 12:02:11,814 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 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 79 [2021-12-15 12:02:11,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:11,831 INFO L225 Difference]: With dead ends: 9588 [2021-12-15 12:02:11,831 INFO L226 Difference]: Without dead ends: 8042 [2021-12-15 12:02:11,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 12:02:11,836 INFO L933 BasicCegarLoop]: 1601 mSDtfsCounter, 4790 mSDsluCounter, 1770 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4790 SdHoareTripleChecker+Valid, 3371 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:11,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4790 Valid, 3371 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:11,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8042 states. [2021-12-15 12:02:12,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8042 to 4626. [2021-12-15 12:02:12,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4626 states, 4624 states have (on average 1.5618512110726643) internal successors, (7222), 4625 states have internal predecessors, (7222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:12,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4626 states to 4626 states and 7222 transitions. [2021-12-15 12:02:12,036 INFO L78 Accepts]: Start accepts. Automaton has 4626 states and 7222 transitions. Word has length 79 [2021-12-15 12:02:12,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:12,037 INFO L470 AbstractCegarLoop]: Abstraction has 4626 states and 7222 transitions. [2021-12-15 12:02:12,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:12,037 INFO L276 IsEmpty]: Start isEmpty. Operand 4626 states and 7222 transitions. [2021-12-15 12:02:12,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 12:02:12,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:12,038 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 12:02:12,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 12:02:12,039 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:12,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:12,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1705346851, now seen corresponding path program 1 times [2021-12-15 12:02:12,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:12,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486464923] [2021-12-15 12:02:12,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:12,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 12:02:12,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:12,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486464923] [2021-12-15 12:02:12,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486464923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:12,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:12,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 12:02:12,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002518533] [2021-12-15 12:02:12,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:12,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:02:12,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:12,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:02:12,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:02:12,089 INFO L87 Difference]: Start difference. First operand 4626 states and 7222 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:12,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:12,384 INFO L93 Difference]: Finished difference Result 11132 states and 16463 transitions. [2021-12-15 12:02:12,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 12:02:12,384 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 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 79 [2021-12-15 12:02:12,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:12,399 INFO L225 Difference]: With dead ends: 11132 [2021-12-15 12:02:12,399 INFO L226 Difference]: Without dead ends: 9586 [2021-12-15 12:02:12,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 12:02:12,403 INFO L933 BasicCegarLoop]: 1603 mSDtfsCounter, 4739 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4739 SdHoareTripleChecker+Valid, 3418 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:12,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4739 Valid, 3418 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:12,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9586 states. [2021-12-15 12:02:12,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9586 to 6946. [2021-12-15 12:02:12,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6946 states, 6944 states have (on average 1.507200460829493) internal successors, (10466), 6945 states have internal predecessors, (10466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:12,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6946 states to 6946 states and 10466 transitions. [2021-12-15 12:02:12,729 INFO L78 Accepts]: Start accepts. Automaton has 6946 states and 10466 transitions. Word has length 79 [2021-12-15 12:02:12,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:12,730 INFO L470 AbstractCegarLoop]: Abstraction has 6946 states and 10466 transitions. [2021-12-15 12:02:12,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:12,730 INFO L276 IsEmpty]: Start isEmpty. Operand 6946 states and 10466 transitions. [2021-12-15 12:02:12,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 12:02:12,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:12,732 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 12:02:12,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 12:02:12,733 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:12,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:12,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1979034563, now seen corresponding path program 1 times [2021-12-15 12:02:12,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:12,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562371295] [2021-12-15 12:02:12,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:12,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:12,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 12:02:12,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:12,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562371295] [2021-12-15 12:02:12,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562371295] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:12,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:12,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 12:02:12,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664428464] [2021-12-15 12:02:12,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:12,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:02:12,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:12,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:02:12,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:02:12,789 INFO L87 Difference]: Start difference. First operand 6946 states and 10466 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:13,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:13,127 INFO L93 Difference]: Finished difference Result 12676 states and 18639 transitions. [2021-12-15 12:02:13,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 12:02:13,128 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 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 79 [2021-12-15 12:02:13,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:13,145 INFO L225 Difference]: With dead ends: 12676 [2021-12-15 12:02:13,145 INFO L226 Difference]: Without dead ends: 11130 [2021-12-15 12:02:13,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 12:02:13,150 INFO L933 BasicCegarLoop]: 1601 mSDtfsCounter, 4774 mSDsluCounter, 1793 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4774 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:13,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4774 Valid, 3394 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:13,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11130 states. [2021-12-15 12:02:13,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11130 to 8490. [2021-12-15 12:02:13,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8490 states, 8488 states have (on average 1.4893967954759662) internal successors, (12642), 8489 states have internal predecessors, (12642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:13,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 12642 transitions. [2021-12-15 12:02:13,513 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 12642 transitions. Word has length 79 [2021-12-15 12:02:13,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:13,513 INFO L470 AbstractCegarLoop]: Abstraction has 8490 states and 12642 transitions. [2021-12-15 12:02:13,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:13,514 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 12642 transitions. [2021-12-15 12:02:13,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-15 12:02:13,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:13,516 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:02:13,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 12:02:13,516 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:13,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:13,517 INFO L85 PathProgramCache]: Analyzing trace with hash 547636123, now seen corresponding path program 1 times [2021-12-15 12:02:13,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:13,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997605902] [2021-12-15 12:02:13,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:13,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:13,555 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:13,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:13,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997605902] [2021-12-15 12:02:13,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997605902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:13,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:13,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:02:13,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029539481] [2021-12-15 12:02:13,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:13,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:02:13,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:13,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:02:13,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:02:13,557 INFO L87 Difference]: Start difference. First operand 8490 states and 12642 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:13,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:13,729 INFO L93 Difference]: Finished difference Result 13416 states and 19659 transitions. [2021-12-15 12:02:13,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:02:13,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-12-15 12:02:13,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:13,741 INFO L225 Difference]: With dead ends: 13416 [2021-12-15 12:02:13,741 INFO L226 Difference]: Without dead ends: 6462 [2021-12-15 12:02:13,750 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 [2021-12-15 12:02:13,752 INFO L933 BasicCegarLoop]: 1572 mSDtfsCounter, 45 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 3096 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:13,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 3096 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:13,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6462 states. [2021-12-15 12:02:13,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6462 to 6460. [2021-12-15 12:02:13,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6460 states, 6458 states have (on average 1.5156395168782906) internal successors, (9788), 6459 states have internal predecessors, (9788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:13,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6460 states to 6460 states and 9788 transitions. [2021-12-15 12:02:13,936 INFO L78 Accepts]: Start accepts. Automaton has 6460 states and 9788 transitions. Word has length 81 [2021-12-15 12:02:13,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:13,937 INFO L470 AbstractCegarLoop]: Abstraction has 6460 states and 9788 transitions. [2021-12-15 12:02:13,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:13,937 INFO L276 IsEmpty]: Start isEmpty. Operand 6460 states and 9788 transitions. [2021-12-15 12:02:13,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-15 12:02:13,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:13,938 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:02:13,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 12:02:13,939 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:13,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:13,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1706064798, now seen corresponding path program 1 times [2021-12-15 12:02:13,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:13,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210710071] [2021-12-15 12:02:13,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:13,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 12:02:13,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:13,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210710071] [2021-12-15 12:02:13,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210710071] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:13,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:13,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 12:02:13,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182796639] [2021-12-15 12:02:13,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:13,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:02:13,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:13,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:02:13,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:02:13,986 INFO L87 Difference]: Start difference. First operand 6460 states and 9788 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:14,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:14,327 INFO L93 Difference]: Finished difference Result 10822 states and 16001 transitions. [2021-12-15 12:02:14,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 12:02:14,328 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 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 81 [2021-12-15 12:02:14,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:14,341 INFO L225 Difference]: With dead ends: 10822 [2021-12-15 12:02:14,342 INFO L226 Difference]: Without dead ends: 9732 [2021-12-15 12:02:14,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 12:02:14,346 INFO L933 BasicCegarLoop]: 1600 mSDtfsCounter, 4758 mSDsluCounter, 1790 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4758 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:14,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4758 Valid, 3390 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:14,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9732 states. [2021-12-15 12:02:14,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9732 to 7548. [2021-12-15 12:02:14,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7548 states, 7546 states have (on average 1.5006626027034191) internal successors, (11324), 7547 states have internal predecessors, (11324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:14,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7548 states to 7548 states and 11324 transitions. [2021-12-15 12:02:14,639 INFO L78 Accepts]: Start accepts. Automaton has 7548 states and 11324 transitions. Word has length 81 [2021-12-15 12:02:14,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:14,640 INFO L470 AbstractCegarLoop]: Abstraction has 7548 states and 11324 transitions. [2021-12-15 12:02:14,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:14,640 INFO L276 IsEmpty]: Start isEmpty. Operand 7548 states and 11324 transitions. [2021-12-15 12:02:14,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-15 12:02:14,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:14,643 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 12:02:14,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 12:02:14,643 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:14,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:14,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1625443301, now seen corresponding path program 1 times [2021-12-15 12:02:14,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:14,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975340595] [2021-12-15 12:02:14,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:14,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:14,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:14,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975340595] [2021-12-15 12:02:14,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975340595] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:14,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:14,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:02:14,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571740155] [2021-12-15 12:02:14,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:14,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:02:14,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:14,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:02:14,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:02:14,683 INFO L87 Difference]: Start difference. First operand 7548 states and 11324 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:14,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:14,827 INFO L93 Difference]: Finished difference Result 10544 states and 15550 transitions. [2021-12-15 12:02:14,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:02:14,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-15 12:02:14,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:14,834 INFO L225 Difference]: With dead ends: 10544 [2021-12-15 12:02:14,834 INFO L226 Difference]: Without dead ends: 4558 [2021-12-15 12:02:14,840 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 [2021-12-15 12:02:14,841 INFO L933 BasicCegarLoop]: 1565 mSDtfsCounter, 39 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3081 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:14,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 3081 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:14,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4558 states. [2021-12-15 12:02:14,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4558 to 4556. [2021-12-15 12:02:14,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4556 states, 4554 states have (on average 1.5494071146245059) internal successors, (7056), 4555 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:14,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4556 states to 4556 states and 7056 transitions. [2021-12-15 12:02:14,990 INFO L78 Accepts]: Start accepts. Automaton has 4556 states and 7056 transitions. Word has length 82 [2021-12-15 12:02:14,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:14,991 INFO L470 AbstractCegarLoop]: Abstraction has 4556 states and 7056 transitions. [2021-12-15 12:02:14,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:14,991 INFO L276 IsEmpty]: Start isEmpty. Operand 4556 states and 7056 transitions. [2021-12-15 12:02:14,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-15 12:02:14,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:14,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:02:14,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 12:02:14,993 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:14,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:14,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1082921701, now seen corresponding path program 1 times [2021-12-15 12:02:14,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:14,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671830832] [2021-12-15 12:02:14,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:14,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:15,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:15,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:15,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671830832] [2021-12-15 12:02:15,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671830832] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:15,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:15,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:02:15,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504735269] [2021-12-15 12:02:15,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:15,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:02:15,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:15,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:02:15,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:02:15,023 INFO L87 Difference]: Start difference. First operand 4556 states and 7056 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:15,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:15,109 INFO L93 Difference]: Finished difference Result 6056 states and 9148 transitions. [2021-12-15 12:02:15,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:02:15,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-15 12:02:15,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:15,115 INFO L225 Difference]: With dead ends: 6056 [2021-12-15 12:02:15,115 INFO L226 Difference]: Without dead ends: 3062 [2021-12-15 12:02:15,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:02:15,120 INFO L933 BasicCegarLoop]: 1558 mSDtfsCounter, 35 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3066 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:15,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 3066 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:15,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2021-12-15 12:02:15,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 3060. [2021-12-15 12:02:15,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3060 states, 3058 states have (on average 1.616742969260955) internal successors, (4944), 3059 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3060 states to 3060 states and 4944 transitions. [2021-12-15 12:02:15,203 INFO L78 Accepts]: Start accepts. Automaton has 3060 states and 4944 transitions. Word has length 82 [2021-12-15 12:02:15,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:15,203 INFO L470 AbstractCegarLoop]: Abstraction has 3060 states and 4944 transitions. [2021-12-15 12:02:15,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:15,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3060 states and 4944 transitions. [2021-12-15 12:02:15,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-15 12:02:15,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:15,205 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:02:15,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 12:02:15,205 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:15,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:15,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1170040495, now seen corresponding path program 1 times [2021-12-15 12:02:15,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:15,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996183863] [2021-12-15 12:02:15,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:15,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:15,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:15,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996183863] [2021-12-15 12:02:15,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996183863] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:15,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:15,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:02:15,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504068160] [2021-12-15 12:02:15,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:15,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:02:15,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:15,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:02:15,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:02:15,230 INFO L87 Difference]: Start difference. First operand 3060 states and 4944 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:15,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:15,266 INFO L93 Difference]: Finished difference Result 3812 states and 5980 transitions. [2021-12-15 12:02:15,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:02:15,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-15 12:02:15,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:15,270 INFO L225 Difference]: With dead ends: 3812 [2021-12-15 12:02:15,270 INFO L226 Difference]: Without dead ends: 2314 [2021-12-15 12:02:15,272 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 [2021-12-15 12:02:15,273 INFO L933 BasicCegarLoop]: 1551 mSDtfsCounter, 31 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3051 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:15,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 3051 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:15,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-12-15 12:02:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2312. [2021-12-15 12:02:15,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2310 states have (on average 1.687878787878788) internal successors, (3899), 2311 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:15,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 3899 transitions. [2021-12-15 12:02:15,313 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 3899 transitions. Word has length 82 [2021-12-15 12:02:15,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:15,313 INFO L470 AbstractCegarLoop]: Abstraction has 2312 states and 3899 transitions. [2021-12-15 12:02:15,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:15,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 3899 transitions. [2021-12-15 12:02:15,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-15 12:02:15,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:15,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:02:15,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 12:02:15,315 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:15,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:15,315 INFO L85 PathProgramCache]: Analyzing trace with hash 2005651591, now seen corresponding path program 1 times [2021-12-15 12:02:15,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:15,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898667107] [2021-12-15 12:02:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:15,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:15,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:15,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898667107] [2021-12-15 12:02:15,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898667107] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 12:02:15,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390051776] [2021-12-15 12:02:15,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:15,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:02:15,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:02:15,492 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) [2021-12-15 12:02:15,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 12:02:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:15,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 12:02:15,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 12:02:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 12:02:15,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 12:02:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 12:02:16,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390051776] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 12:02:16,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 12:02:16,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-15 12:02:16,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539370836] [2021-12-15 12:02:16,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 12:02:16,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 12:02:16,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:16,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 12:02:16,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-15 12:02:16,096 INFO L87 Difference]: Start difference. First operand 2312 states and 3899 transitions. Second operand has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:18,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:18,601 INFO L93 Difference]: Finished difference Result 11471 states and 16110 transitions. [2021-12-15 12:02:18,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-15 12:02:18,602 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-15 12:02:18,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:18,620 INFO L225 Difference]: With dead ends: 11471 [2021-12-15 12:02:18,620 INFO L226 Difference]: Without dead ends: 10721 [2021-12-15 12:02:18,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1175, Invalid=5467, Unknown=0, NotChecked=0, Total=6642 [2021-12-15 12:02:18,627 INFO L933 BasicCegarLoop]: 1547 mSDtfsCounter, 11788 mSDsluCounter, 5285 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11788 SdHoareTripleChecker+Valid, 6832 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:18,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11788 Valid, 6832 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 12:02:18,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10721 states. [2021-12-15 12:02:18,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10721 to 7981. [2021-12-15 12:02:18,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7981 states, 7979 states have (on average 1.398295525755107) internal successors, (11157), 7980 states have internal predecessors, (11157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:18,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7981 states to 7981 states and 11157 transitions. [2021-12-15 12:02:18,914 INFO L78 Accepts]: Start accepts. Automaton has 7981 states and 11157 transitions. Word has length 82 [2021-12-15 12:02:18,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:18,914 INFO L470 AbstractCegarLoop]: Abstraction has 7981 states and 11157 transitions. [2021-12-15 12:02:18,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:18,915 INFO L276 IsEmpty]: Start isEmpty. Operand 7981 states and 11157 transitions. [2021-12-15 12:02:18,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 12:02:18,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:18,916 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 12:02:18,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 12:02:19,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:02:19,136 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:19,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:19,136 INFO L85 PathProgramCache]: Analyzing trace with hash -10585946, now seen corresponding path program 1 times [2021-12-15 12:02:19,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:19,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602030533] [2021-12-15 12:02:19,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:19,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:19,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:19,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602030533] [2021-12-15 12:02:19,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602030533] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 12:02:19,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719127225] [2021-12-15 12:02:19,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:19,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:02:19,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:02:19,352 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) [2021-12-15 12:02:19,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 12:02:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:19,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-15 12:02:19,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 12:02:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:20,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 12:02:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:20,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719127225] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 12:02:20,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 12:02:20,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2021-12-15 12:02:20,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038028076] [2021-12-15 12:02:20,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 12:02:20,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-15 12:02:20,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:20,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-15 12:02:20,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-12-15 12:02:20,674 INFO L87 Difference]: Start difference. First operand 7981 states and 11157 transitions. Second operand has 28 states, 28 states have (on average 7.821428571428571) internal successors, (219), 27 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:22,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:22,733 INFO L93 Difference]: Finished difference Result 36728 states and 47639 transitions. [2021-12-15 12:02:22,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 12:02:22,733 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 7.821428571428571) internal successors, (219), 27 states have internal predecessors, (219), 0 states have call successors, (0), 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 83 [2021-12-15 12:02:22,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:22,789 INFO L225 Difference]: With dead ends: 36728 [2021-12-15 12:02:22,789 INFO L226 Difference]: Without dead ends: 30779 [2021-12-15 12:02:22,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=555, Invalid=1895, Unknown=0, NotChecked=0, Total=2450 [2021-12-15 12:02:22,805 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 11301 mSDsluCounter, 8281 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11301 SdHoareTripleChecker+Valid, 9810 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:22,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11301 Valid, 9810 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 12:02:22,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30779 states. [2021-12-15 12:02:23,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30779 to 18588. [2021-12-15 12:02:23,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18588 states, 18586 states have (on average 1.3288496717959755) internal successors, (24698), 18587 states have internal predecessors, (24698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18588 states to 18588 states and 24698 transitions. [2021-12-15 12:02:23,706 INFO L78 Accepts]: Start accepts. Automaton has 18588 states and 24698 transitions. Word has length 83 [2021-12-15 12:02:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:23,706 INFO L470 AbstractCegarLoop]: Abstraction has 18588 states and 24698 transitions. [2021-12-15 12:02:23,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.821428571428571) internal successors, (219), 27 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 18588 states and 24698 transitions. [2021-12-15 12:02:23,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 12:02:23,708 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:23,708 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 12:02:23,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 12:02:23,921 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,SelfDestructingSolverStorable20 [2021-12-15 12:02:23,922 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:23,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:23,922 INFO L85 PathProgramCache]: Analyzing trace with hash 879036518, now seen corresponding path program 1 times [2021-12-15 12:02:23,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:23,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004126629] [2021-12-15 12:02:23,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:23,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:24,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:24,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004126629] [2021-12-15 12:02:24,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004126629] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 12:02:24,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657155128] [2021-12-15 12:02:24,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:24,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:02:24,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:02:24,092 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) [2021-12-15 12:02:24,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 12:02:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:24,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 12:02:24,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 12:02:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:24,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 12:02:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:25,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657155128] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 12:02:25,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 12:02:25,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2021-12-15 12:02:25,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323407280] [2021-12-15 12:02:25,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 12:02:25,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-15 12:02:25,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:25,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-15 12:02:25,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-12-15 12:02:25,407 INFO L87 Difference]: Start difference. First operand 18588 states and 24698 transitions. Second operand has 25 states, 25 states have (on average 8.36) internal successors, (209), 24 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:37,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:37,059 INFO L93 Difference]: Finished difference Result 194338 states and 248338 transitions. [2021-12-15 12:02:37,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-15 12:02:37,060 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 8.36) internal successors, (209), 24 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-15 12:02:37,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:37,533 INFO L225 Difference]: With dead ends: 194338 [2021-12-15 12:02:37,534 INFO L226 Difference]: Without dead ends: 177759 [2021-12-15 12:02:37,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1884 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1256, Invalid=6054, Unknown=0, NotChecked=0, Total=7310 [2021-12-15 12:02:37,651 INFO L933 BasicCegarLoop]: 1594 mSDtfsCounter, 20821 mSDsluCounter, 9080 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20821 SdHoareTripleChecker+Valid, 10674 SdHoareTripleChecker+Invalid, 2009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:37,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20821 Valid, 10674 Invalid, 2009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 12:02:38,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177759 states. [2021-12-15 12:02:46,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177759 to 105407. [2021-12-15 12:02:46,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105407 states, 105405 states have (on average 1.2485840330155116) internal successors, (131607), 105406 states have internal predecessors, (131607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:47,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105407 states to 105407 states and 131607 transitions. [2021-12-15 12:02:47,250 INFO L78 Accepts]: Start accepts. Automaton has 105407 states and 131607 transitions. Word has length 83 [2021-12-15 12:02:47,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:47,251 INFO L470 AbstractCegarLoop]: Abstraction has 105407 states and 131607 transitions. [2021-12-15 12:02:47,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.36) internal successors, (209), 24 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:47,251 INFO L276 IsEmpty]: Start isEmpty. Operand 105407 states and 131607 transitions. [2021-12-15 12:02:47,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 12:02:47,281 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:47,282 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 12:02:47,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 12:02:47,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:02:47,504 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:47,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:47,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1541620906, now seen corresponding path program 1 times [2021-12-15 12:02:47,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:47,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91658976] [2021-12-15 12:02:47,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:47,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 12:02:47,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:47,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91658976] [2021-12-15 12:02:47,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91658976] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:47,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:47,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:02:47,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418646485] [2021-12-15 12:02:47,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:47,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:02:47,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:47,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:02:47,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:02:47,602 INFO L87 Difference]: Start difference. First operand 105407 states and 131607 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:52,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:52,687 INFO L93 Difference]: Finished difference Result 155844 states and 195275 transitions. [2021-12-15 12:02:52,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 12:02:52,688 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 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 83 [2021-12-15 12:02:52,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:52,841 INFO L225 Difference]: With dead ends: 155844 [2021-12-15 12:02:52,842 INFO L226 Difference]: Without dead ends: 52150 [2021-12-15 12:02:52,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 12:02:52,944 INFO L933 BasicCegarLoop]: 1506 mSDtfsCounter, 4552 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4552 SdHoareTripleChecker+Valid, 2995 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:52,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4552 Valid, 2995 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:02:53,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52150 states. [2021-12-15 12:02:57,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52150 to 52150. [2021-12-15 12:02:57,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52150 states, 52148 states have (on average 1.2552542762905576) internal successors, (65459), 52149 states have internal predecessors, (65459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:57,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52150 states to 52150 states and 65459 transitions. [2021-12-15 12:02:57,445 INFO L78 Accepts]: Start accepts. Automaton has 52150 states and 65459 transitions. Word has length 83 [2021-12-15 12:02:57,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:57,446 INFO L470 AbstractCegarLoop]: Abstraction has 52150 states and 65459 transitions. [2021-12-15 12:02:57,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:57,446 INFO L276 IsEmpty]: Start isEmpty. Operand 52150 states and 65459 transitions. [2021-12-15 12:02:57,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 12:02:57,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:57,451 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 12:02:57,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-15 12:02:57,464 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:57,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:57,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1994591510, now seen corresponding path program 1 times [2021-12-15 12:02:57,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:57,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751059779] [2021-12-15 12:02:57,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:57,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:57,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 12:02:57,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:57,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751059779] [2021-12-15 12:02:57,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751059779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:57,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:57,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:02:57,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120714335] [2021-12-15 12:02:57,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:57,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:02:57,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:57,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:02:57,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:02:57,539 INFO L87 Difference]: Start difference. First operand 52150 states and 65459 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:03:01,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:03:01,016 INFO L93 Difference]: Finished difference Result 89741 states and 112113 transitions. [2021-12-15 12:03:01,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 12:03:01,017 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 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 83 [2021-12-15 12:03:01,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:03:01,103 INFO L225 Difference]: With dead ends: 89741 [2021-12-15 12:03:01,104 INFO L226 Difference]: Without dead ends: 39316 [2021-12-15 12:03:01,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 12:03:01,148 INFO L933 BasicCegarLoop]: 1506 mSDtfsCounter, 4620 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4620 SdHoareTripleChecker+Valid, 2976 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:03:01,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4620 Valid, 2976 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:03:01,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39316 states. [2021-12-15 12:03:04,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39316 to 39316. [2021-12-15 12:03:04,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39316 states, 39314 states have (on average 1.2507249325939869) internal successors, (49171), 39315 states have internal predecessors, (49171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:03:04,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39316 states to 39316 states and 49171 transitions. [2021-12-15 12:03:04,790 INFO L78 Accepts]: Start accepts. Automaton has 39316 states and 49171 transitions. Word has length 83 [2021-12-15 12:03:04,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:03:04,791 INFO L470 AbstractCegarLoop]: Abstraction has 39316 states and 49171 transitions. [2021-12-15 12:03:04,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:03:04,792 INFO L276 IsEmpty]: Start isEmpty. Operand 39316 states and 49171 transitions. [2021-12-15 12:03:04,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 12:03:04,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:03:04,794 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 12:03:04,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-15 12:03:04,798 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:03:04,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:03:04,804 INFO L85 PathProgramCache]: Analyzing trace with hash -506761782, now seen corresponding path program 1 times [2021-12-15 12:03:04,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:03:04,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939251456] [2021-12-15 12:03:04,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:03:04,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:03:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:03:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 12:03:04,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:03:04,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939251456] [2021-12-15 12:03:04,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939251456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:03:04,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:03:04,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:03:04,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659311290] [2021-12-15 12:03:04,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:03:04,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:03:04,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:03:04,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:03:04,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:03:04,853 INFO L87 Difference]: Start difference. First operand 39316 states and 49171 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)