./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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.3.ufo.UNBOUNDED.pals+Problem12_label02.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 7f76748541784d411910169ed2e15112ec49f79534c3b32715f52add5fae5a74 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:01:35,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:01:35,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:01:35,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:01:35,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:01:35,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:01:35,809 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:01:35,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:01:35,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:01:35,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:01:35,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:01:35,818 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:01:35,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:01:35,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:01:35,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:01:35,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:01:35,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:01:35,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:01:35,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:01:35,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:01:35,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:01:35,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:01:35,833 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:01:35,834 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:01:35,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:01:35,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:01:35,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:01:35,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:01:35,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:01:35,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:01:35,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:01:35,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:01:35,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:01:35,843 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:01:35,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:01:35,844 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:01:35,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:01:35,844 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:01:35,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:01:35,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:01:35,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:01:35,846 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:01:35,871 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:01:35,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:01:35,872 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:01:35,872 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:01:35,873 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:01:35,873 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:01:35,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:01:35,874 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:01:35,874 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:01:35,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:01:35,875 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:01:35,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:01:35,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:01:35,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:01:35,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:01:35,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:01:35,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:01:35,876 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:01:35,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:01:35,876 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:01:35,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:01:35,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:01:35,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:01:35,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:01:35,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:01:35,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:01:35,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:01:35,877 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:01:35,877 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:01:35,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:01:35,878 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:01:35,878 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:01:35,878 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:01:35,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:01:35,878 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f76748541784d411910169ed2e15112ec49f79534c3b32715f52add5fae5a74 [2021-12-14 16:01:36,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:01:36,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:01:36,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:01:36,108 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:01:36,109 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:01:36,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label02.c [2021-12-14 16:01:36,155 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eff18587d/5f1ab775a75b478e88f74c4e8fbc8e76/FLAG3a22f12ab [2021-12-14 16:01:36,796 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:01:36,797 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label02.c [2021-12-14 16:01:36,821 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eff18587d/5f1ab775a75b478e88f74c4e8fbc8e76/FLAG3a22f12ab [2021-12-14 16:01:36,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eff18587d/5f1ab775a75b478e88f74c4e8fbc8e76 [2021-12-14 16:01:36,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:01:36,972 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:01:36,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:01:36,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:01:36,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:01:36,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:01:36" (1/1) ... [2021-12-14 16:01:36,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71ee0968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:36, skipping insertion in model container [2021-12-14 16:01:36,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:01:36" (1/1) ... [2021-12-14 16:01:36,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:01:37,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:01:37,311 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.3.ufo.UNBOUNDED.pals+Problem12_label02.c[6450,6463] [2021-12-14 16:01:37,362 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.3.ufo.UNBOUNDED.pals+Problem12_label02.c[13740,13753] [2021-12-14 16:01:37,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:01:37,801 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:01:37,816 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.3.ufo.UNBOUNDED.pals+Problem12_label02.c[6450,6463] [2021-12-14 16:01:37,834 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.3.ufo.UNBOUNDED.pals+Problem12_label02.c[13740,13753] [2021-12-14 16:01:38,148 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:01:38,169 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:01:38,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:38 WrapperNode [2021-12-14 16:01:38,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:01:38,171 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:01:38,171 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:01:38,171 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:01:38,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:38" (1/1) ... [2021-12-14 16:01:38,219 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:38" (1/1) ... [2021-12-14 16:01:38,500 INFO L137 Inliner]: procedures = 35, calls = 20, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 4976 [2021-12-14 16:01:38,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:01:38,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:01:38,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:01:38,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:01:38,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:38" (1/1) ... [2021-12-14 16:01:38,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:38" (1/1) ... [2021-12-14 16:01:38,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:38" (1/1) ... [2021-12-14 16:01:38,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:38" (1/1) ... [2021-12-14 16:01:38,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:38" (1/1) ... [2021-12-14 16:01:38,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:38" (1/1) ... [2021-12-14 16:01:38,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:38" (1/1) ... [2021-12-14 16:01:38,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:01:38,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:01:38,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:01:38,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:01:38,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:38" (1/1) ... [2021-12-14 16:01:38,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:01:38,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:01:38,941 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) [2021-12-14 16:01:39,003 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 [2021-12-14 16:01:39,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:01:39,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:01:39,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:01:39,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:01:39,129 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:01:39,144 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:01:41,845 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:01:41,857 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:01:41,857 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 16:01:41,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:01:41 BoogieIcfgContainer [2021-12-14 16:01:41,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:01:41,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:01:41,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:01:41,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:01:41,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:01:36" (1/3) ... [2021-12-14 16:01:41,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a980b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:01:41, skipping insertion in model container [2021-12-14 16:01:41,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:38" (2/3) ... [2021-12-14 16:01:41,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a980b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:01:41, skipping insertion in model container [2021-12-14 16:01:41,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:01:41" (3/3) ... [2021-12-14 16:01:41,866 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label02.c [2021-12-14 16:01:41,869 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:01:41,870 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:01:41,902 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:01:41,906 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 [2021-12-14 16:01:41,907 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:01:41,928 INFO L276 IsEmpty]: Start isEmpty. Operand has 880 states, 877 states have (on average 1.903078677309008) internal successors, (1669), 879 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:41,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-14 16:01:41,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:41,934 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] [2021-12-14 16:01:41,935 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:41,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:41,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1601385972, now seen corresponding path program 1 times [2021-12-14 16:01:41,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:41,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235976666] [2021-12-14 16:01:41,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:41,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:42,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:42,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235976666] [2021-12-14 16:01:42,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235976666] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:42,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:42,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:01:42,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889250152] [2021-12-14 16:01:42,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:42,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 16:01:42,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:42,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 16:01:42,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 16:01:42,075 INFO L87 Difference]: Start difference. First operand has 880 states, 877 states have (on average 1.903078677309008) internal successors, (1669), 879 states have internal predecessors, (1669), 0 states have call successors, (0), 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 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:42,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:42,124 INFO L93 Difference]: Finished difference Result 1736 states and 3296 transitions. [2021-12-14 16:01:42,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 16:01:42,130 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-14 16:01:42,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:42,142 INFO L225 Difference]: With dead ends: 1736 [2021-12-14 16:01:42,142 INFO L226 Difference]: Without dead ends: 814 [2021-12-14 16:01:42,149 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 [2021-12-14 16:01:42,151 INFO L933 BasicCegarLoop]: 1600 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, 1600 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 [2021-12-14 16:01:42,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:42,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-12-14 16:01:42,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 814. [2021-12-14 16:01:42,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 812 states have (on average 1.8916256157635467) internal successors, (1536), 813 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:42,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1536 transitions. [2021-12-14 16:01:42,216 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1536 transitions. Word has length 26 [2021-12-14 16:01:42,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:42,216 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1536 transitions. [2021-12-14 16:01:42,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:42,217 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1536 transitions. [2021-12-14 16:01:42,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-14 16:01:42,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:42,218 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] [2021-12-14 16:01:42,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:01:42,219 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:42,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:42,221 INFO L85 PathProgramCache]: Analyzing trace with hash 783737522, now seen corresponding path program 1 times [2021-12-14 16:01:42,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:42,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400822899] [2021-12-14 16:01:42,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:42,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:42,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:42,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400822899] [2021-12-14 16:01:42,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400822899] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:42,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:42,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:42,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647176562] [2021-12-14 16:01:42,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:42,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:42,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:42,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:42,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:42,311 INFO L87 Difference]: Start difference. First operand 814 states and 1536 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:42,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:42,406 INFO L93 Difference]: Finished difference Result 856 states and 1599 transitions. [2021-12-14 16:01:42,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:01:42,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-14 16:01:42,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:42,410 INFO L225 Difference]: With dead ends: 856 [2021-12-14 16:01:42,410 INFO L226 Difference]: Without dead ends: 814 [2021-12-14 16:01:42,411 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 [2021-12-14 16:01:42,412 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 3 mSDsluCounter, 4583 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6117 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:42,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6117 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:42,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-12-14 16:01:42,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 814. [2021-12-14 16:01:42,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 812 states have (on average 1.8719211822660098) internal successors, (1520), 813 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:42,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1520 transitions. [2021-12-14 16:01:42,428 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1520 transitions. Word has length 26 [2021-12-14 16:01:42,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:42,429 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1520 transitions. [2021-12-14 16:01:42,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:42,430 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1520 transitions. [2021-12-14 16:01:42,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 16:01:42,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:42,431 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] [2021-12-14 16:01:42,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:01:42,431 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:42,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:42,432 INFO L85 PathProgramCache]: Analyzing trace with hash -698732182, now seen corresponding path program 1 times [2021-12-14 16:01:42,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:42,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861562718] [2021-12-14 16:01:42,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:42,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:42,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:42,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:42,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861562718] [2021-12-14 16:01:42,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861562718] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:42,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:42,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:42,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867361682] [2021-12-14 16:01:42,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:42,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:42,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:42,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:42,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:42,475 INFO L87 Difference]: Start difference. First operand 814 states and 1520 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:42,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:42,500 INFO L93 Difference]: Finished difference Result 884 states and 1628 transitions. [2021-12-14 16:01:42,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:42,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-14 16:01:42,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:42,503 INFO L225 Difference]: With dead ends: 884 [2021-12-14 16:01:42,504 INFO L226 Difference]: Without dead ends: 846 [2021-12-14 16:01:42,504 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 [2021-12-14 16:01:42,505 INFO L933 BasicCegarLoop]: 1549 mSDtfsCounter, 1484 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 1610 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 [2021-12-14 16:01:42,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1484 Valid, 1610 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:42,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-12-14 16:01:42,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 844. [2021-12-14 16:01:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 842 states have (on average 1.8610451306413303) internal successors, (1567), 843 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1567 transitions. [2021-12-14 16:01:42,520 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1567 transitions. Word has length 41 [2021-12-14 16:01:42,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:42,521 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1567 transitions. [2021-12-14 16:01:42,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:42,521 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1567 transitions. [2021-12-14 16:01:42,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 16:01:42,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:42,522 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] [2021-12-14 16:01:42,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:01:42,523 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:42,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:42,530 INFO L85 PathProgramCache]: Analyzing trace with hash -360939040, now seen corresponding path program 1 times [2021-12-14 16:01:42,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:42,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892912147] [2021-12-14 16:01:42,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:42,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:42,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:42,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892912147] [2021-12-14 16:01:42,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892912147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:42,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:42,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:42,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108829763] [2021-12-14 16:01:42,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:42,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:42,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:42,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:42,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:42,567 INFO L87 Difference]: Start difference. First operand 844 states and 1567 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:42,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:42,589 INFO L93 Difference]: Finished difference Result 968 states and 1759 transitions. [2021-12-14 16:01:42,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:42,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-14 16:01:42,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:42,592 INFO L225 Difference]: With dead ends: 968 [2021-12-14 16:01:42,593 INFO L226 Difference]: Without dead ends: 900 [2021-12-14 16:01:42,593 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 [2021-12-14 16:01:42,594 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 1480 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1609 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 [2021-12-14 16:01:42,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 1609 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:42,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2021-12-14 16:01:42,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 898. [2021-12-14 16:01:42,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 896 states have (on average 1.8415178571428572) internal successors, (1650), 897 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:42,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1650 transitions. [2021-12-14 16:01:42,610 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1650 transitions. Word has length 41 [2021-12-14 16:01:42,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:42,610 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1650 transitions. [2021-12-14 16:01:42,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:42,611 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1650 transitions. [2021-12-14 16:01:42,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 16:01:42,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:42,612 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] [2021-12-14 16:01:42,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:01:42,612 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:42,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:42,613 INFO L85 PathProgramCache]: Analyzing trace with hash 857046358, now seen corresponding path program 1 times [2021-12-14 16:01:42,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:42,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765379201] [2021-12-14 16:01:42,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:42,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:42,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:42,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765379201] [2021-12-14 16:01:42,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765379201] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:42,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:42,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:42,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440404726] [2021-12-14 16:01:42,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:42,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:42,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:42,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:42,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:42,658 INFO L87 Difference]: Start difference. First operand 898 states and 1650 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:42,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:42,746 INFO L93 Difference]: Finished difference Result 1630 states and 2784 transitions. [2021-12-14 16:01:42,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:01:42,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-14 16:01:42,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:42,751 INFO L225 Difference]: With dead ends: 1630 [2021-12-14 16:01:42,752 INFO L226 Difference]: Without dead ends: 1508 [2021-12-14 16:01:42,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:01:42,753 INFO L933 BasicCegarLoop]: 1516 mSDtfsCounter, 4693 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4693 SdHoareTripleChecker+Valid, 1934 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:42,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4693 Valid, 1934 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:42,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2021-12-14 16:01:42,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1018. [2021-12-14 16:01:42,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1016 states have (on average 1.8011811023622046) internal successors, (1830), 1017 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:42,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1830 transitions. [2021-12-14 16:01:42,780 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1830 transitions. Word has length 41 [2021-12-14 16:01:42,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:42,780 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 1830 transitions. [2021-12-14 16:01:42,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:42,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1830 transitions. [2021-12-14 16:01:42,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 16:01:42,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:42,782 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] [2021-12-14 16:01:42,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:01:42,782 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:42,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:42,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1867096070, now seen corresponding path program 1 times [2021-12-14 16:01:42,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:42,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895171571] [2021-12-14 16:01:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:42,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:42,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:42,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895171571] [2021-12-14 16:01:42,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895171571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:42,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:42,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:42,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244871444] [2021-12-14 16:01:42,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:42,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:42,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:42,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:42,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:42,814 INFO L87 Difference]: Start difference. First operand 1018 states and 1830 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:42,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:42,845 INFO L93 Difference]: Finished difference Result 1458 states and 2492 transitions. [2021-12-14 16:01:42,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:42,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-14 16:01:42,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:42,851 INFO L225 Difference]: With dead ends: 1458 [2021-12-14 16:01:42,851 INFO L226 Difference]: Without dead ends: 1216 [2021-12-14 16:01:42,852 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 [2021-12-14 16:01:42,853 INFO L933 BasicCegarLoop]: 1517 mSDtfsCounter, 1471 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 1569 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 [2021-12-14 16:01:42,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1471 Valid, 1569 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:42,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-12-14 16:01:42,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1206. [2021-12-14 16:01:42,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1204 states have (on average 1.739202657807309) internal successors, (2094), 1205 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:42,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 2094 transitions. [2021-12-14 16:01:42,878 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 2094 transitions. Word has length 43 [2021-12-14 16:01:42,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:42,879 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 2094 transitions. [2021-12-14 16:01:42,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:42,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 2094 transitions. [2021-12-14 16:01:42,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 16:01:42,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:42,880 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] [2021-12-14 16:01:42,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:01:42,880 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:42,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:42,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1933589582, now seen corresponding path program 1 times [2021-12-14 16:01:42,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:42,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807754051] [2021-12-14 16:01:42,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:42,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:42,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:42,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:42,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807754051] [2021-12-14 16:01:42,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807754051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:42,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:42,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:42,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94558668] [2021-12-14 16:01:42,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:42,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:42,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:42,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:42,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:42,950 INFO L87 Difference]: Start difference. First operand 1206 states and 2094 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:43,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:43,074 INFO L93 Difference]: Finished difference Result 1638 states and 2728 transitions. [2021-12-14 16:01:43,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:01:43,075 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-14 16:01:43,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:43,079 INFO L225 Difference]: With dead ends: 1638 [2021-12-14 16:01:43,079 INFO L226 Difference]: Without dead ends: 1208 [2021-12-14 16:01:43,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:01:43,081 INFO L933 BasicCegarLoop]: 1515 mSDtfsCounter, 1531 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1531 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:43,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1531 Valid, 1680 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:43,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-12-14 16:01:43,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1206. [2021-12-14 16:01:43,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1204 states have (on average 1.7325581395348837) internal successors, (2086), 1205 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:43,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 2086 transitions. [2021-12-14 16:01:43,103 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 2086 transitions. Word has length 43 [2021-12-14 16:01:43,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:43,104 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 2086 transitions. [2021-12-14 16:01:43,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:43,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 2086 transitions. [2021-12-14 16:01:43,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 16:01:43,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:43,105 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] [2021-12-14 16:01:43,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:01:43,105 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:43,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:43,106 INFO L85 PathProgramCache]: Analyzing trace with hash -602988295, now seen corresponding path program 1 times [2021-12-14 16:01:43,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:43,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170008897] [2021-12-14 16:01:43,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:43,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:43,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:43,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170008897] [2021-12-14 16:01:43,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170008897] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:43,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:43,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:43,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751550350] [2021-12-14 16:01:43,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:43,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:43,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:43,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:43,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:43,149 INFO L87 Difference]: Start difference. First operand 1206 states and 2086 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:43,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:43,212 INFO L93 Difference]: Finished difference Result 1540 states and 2558 transitions. [2021-12-14 16:01:43,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:01:43,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-12-14 16:01:43,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:43,217 INFO L225 Difference]: With dead ends: 1540 [2021-12-14 16:01:43,217 INFO L226 Difference]: Without dead ends: 1538 [2021-12-14 16:01:43,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:01:43,219 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 147 mSDsluCounter, 4562 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 6117 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:43,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 6117 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:43,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-12-14 16:01:43,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1230. [2021-12-14 16:01:43,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1228 states have (on average 1.714983713355049) internal successors, (2106), 1229 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:43,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 2106 transitions. [2021-12-14 16:01:43,259 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 2106 transitions. Word has length 44 [2021-12-14 16:01:43,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:43,260 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 2106 transitions. [2021-12-14 16:01:43,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:43,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 2106 transitions. [2021-12-14 16:01:43,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 16:01:43,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:43,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:01:43,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:01:43,264 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:43,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:43,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1900121563, now seen corresponding path program 1 times [2021-12-14 16:01:43,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:43,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555797470] [2021-12-14 16:01:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:43,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:43,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:43,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:43,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555797470] [2021-12-14 16:01:43,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555797470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:43,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:43,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:43,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384387622] [2021-12-14 16:01:43,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:43,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:43,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:43,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:43,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:43,306 INFO L87 Difference]: Start difference. First operand 1230 states and 2106 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:43,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:43,337 INFO L93 Difference]: Finished difference Result 1701 states and 2784 transitions. [2021-12-14 16:01:43,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:43,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-14 16:01:43,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:43,343 INFO L225 Difference]: With dead ends: 1701 [2021-12-14 16:01:43,343 INFO L226 Difference]: Without dead ends: 1434 [2021-12-14 16:01:43,344 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 [2021-12-14 16:01:43,346 INFO L933 BasicCegarLoop]: 1558 mSDtfsCounter, 1485 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1615 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 [2021-12-14 16:01:43,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 1615 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:43,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2021-12-14 16:01:43,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1432. [2021-12-14 16:01:43,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1430 states have (on average 1.6671328671328671) internal successors, (2384), 1431 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:43,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 2384 transitions. [2021-12-14 16:01:43,377 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 2384 transitions. Word has length 45 [2021-12-14 16:01:43,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:43,377 INFO L470 AbstractCegarLoop]: Abstraction has 1432 states and 2384 transitions. [2021-12-14 16:01:43,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:43,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 2384 transitions. [2021-12-14 16:01:43,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-14 16:01:43,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:43,378 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:01:43,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:01:43,379 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:43,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:43,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1058541208, now seen corresponding path program 1 times [2021-12-14 16:01:43,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:43,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735261585] [2021-12-14 16:01:43,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:43,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:43,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:43,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735261585] [2021-12-14 16:01:43,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735261585] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:43,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:43,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:43,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461723384] [2021-12-14 16:01:43,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:43,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:01:43,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:43,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:01:43,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:01:43,420 INFO L87 Difference]: Start difference. First operand 1432 states and 2384 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:48,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:48,365 INFO L93 Difference]: Finished difference Result 3687 states and 6693 transitions. [2021-12-14 16:01:48,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 16:01:48,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-12-14 16:01:48,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:48,374 INFO L225 Difference]: With dead ends: 3687 [2021-12-14 16:01:48,374 INFO L226 Difference]: Without dead ends: 2934 [2021-12-14 16:01:48,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:48,376 INFO L933 BasicCegarLoop]: 774 mSDtfsCounter, 2337 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5518 mSolverCounterSat, 1100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2337 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 6618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1100 IncrementalHoareTripleChecker+Valid, 5518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:48,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2337 Valid, 792 Invalid, 6618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1100 Valid, 5518 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-14 16:01:48,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-12-14 16:01:48,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2934. [2021-12-14 16:01:48,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2934 states, 2932 states have (on average 1.5381991814461118) internal successors, (4510), 2933 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 4510 transitions. [2021-12-14 16:01:48,431 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 4510 transitions. Word has length 63 [2021-12-14 16:01:48,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:48,431 INFO L470 AbstractCegarLoop]: Abstraction has 2934 states and 4510 transitions. [2021-12-14 16:01:48,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:48,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 4510 transitions. [2021-12-14 16:01:48,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 16:01:48,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:48,433 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:01:48,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:01:48,433 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:48,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:48,434 INFO L85 PathProgramCache]: Analyzing trace with hash -393288849, now seen corresponding path program 1 times [2021-12-14 16:01:48,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:48,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693223346] [2021-12-14 16:01:48,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:48,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 16:01:48,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:48,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693223346] [2021-12-14 16:01:48,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693223346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:48,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:48,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:48,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400658267] [2021-12-14 16:01:48,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:48,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:48,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:48,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:48,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:48,472 INFO L87 Difference]: Start difference. First operand 2934 states and 4510 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:48,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:48,618 INFO L93 Difference]: Finished difference Result 5038 states and 7462 transitions. [2021-12-14 16:01:48,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:01:48,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 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 64 [2021-12-14 16:01:48,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:48,630 INFO L225 Difference]: With dead ends: 5038 [2021-12-14 16:01:48,631 INFO L226 Difference]: Without dead ends: 4384 [2021-12-14 16:01:48,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:01:48,635 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3088 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3088 SdHoareTripleChecker+Valid, 3191 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:48,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3088 Valid, 3191 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:48,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4384 states. [2021-12-14 16:01:48,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4384 to 3586. [2021-12-14 16:01:48,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3586 states, 3584 states have (on average 1.51171875) internal successors, (5418), 3585 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:48,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3586 states to 3586 states and 5418 transitions. [2021-12-14 16:01:48,726 INFO L78 Accepts]: Start accepts. Automaton has 3586 states and 5418 transitions. Word has length 64 [2021-12-14 16:01:48,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:48,728 INFO L470 AbstractCegarLoop]: Abstraction has 3586 states and 5418 transitions. [2021-12-14 16:01:48,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:48,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3586 states and 5418 transitions. [2021-12-14 16:01:48,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 16:01:48,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:48,729 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:01:48,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:01:48,729 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:48,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:48,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2132895631, now seen corresponding path program 1 times [2021-12-14 16:01:48,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:48,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886809811] [2021-12-14 16:01:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:48,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 16:01:48,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:48,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886809811] [2021-12-14 16:01:48,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886809811] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:48,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:48,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:48,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139412259] [2021-12-14 16:01:48,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:48,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:48,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:48,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:48,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:48,793 INFO L87 Difference]: Start difference. First operand 3586 states and 5418 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:48,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:48,914 INFO L93 Difference]: Finished difference Result 5690 states and 8370 transitions. [2021-12-14 16:01:48,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:01:48,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 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 64 [2021-12-14 16:01:48,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:48,930 INFO L225 Difference]: With dead ends: 5690 [2021-12-14 16:01:48,930 INFO L226 Difference]: Without dead ends: 5036 [2021-12-14 16:01:48,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:01:48,934 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3082 mSDsluCounter, 1638 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3082 SdHoareTripleChecker+Valid, 3206 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:48,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3082 Valid, 3206 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:48,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5036 states. [2021-12-14 16:01:49,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5036 to 4566. [2021-12-14 16:01:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4566 states, 4564 states have (on average 1.483347940403155) internal successors, (6770), 4565 states have internal predecessors, (6770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:49,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4566 states to 4566 states and 6770 transitions. [2021-12-14 16:01:49,053 INFO L78 Accepts]: Start accepts. Automaton has 4566 states and 6770 transitions. Word has length 64 [2021-12-14 16:01:49,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:49,053 INFO L470 AbstractCegarLoop]: Abstraction has 4566 states and 6770 transitions. [2021-12-14 16:01:49,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:49,053 INFO L276 IsEmpty]: Start isEmpty. Operand 4566 states and 6770 transitions. [2021-12-14 16:01:49,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:01:49,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:49,054 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] [2021-12-14 16:01:49,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:01:49,055 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:49,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:49,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1342668761, now seen corresponding path program 1 times [2021-12-14 16:01:49,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:49,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203155821] [2021-12-14 16:01:49,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:49,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:49,090 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:49,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:49,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203155821] [2021-12-14 16:01:49,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203155821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:49,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:49,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:49,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146763608] [2021-12-14 16:01:49,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:49,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:49,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:49,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:49,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:49,092 INFO L87 Difference]: Start difference. First operand 4566 states and 6770 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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) [2021-12-14 16:01:49,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:49,158 INFO L93 Difference]: Finished difference Result 6216 states and 9094 transitions. [2021-12-14 16:01:49,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:49,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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 66 [2021-12-14 16:01:49,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:49,176 INFO L225 Difference]: With dead ends: 6216 [2021-12-14 16:01:49,176 INFO L226 Difference]: Without dead ends: 3930 [2021-12-14 16:01:49,180 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 [2021-12-14 16:01:49,181 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 36 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3048 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 [2021-12-14 16:01:49,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3048 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:49,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3930 states. [2021-12-14 16:01:49,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3930 to 3928. [2021-12-14 16:01:49,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3926 states have (on average 1.4984717269485481) internal successors, (5883), 3927 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 5883 transitions. [2021-12-14 16:01:49,333 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 5883 transitions. Word has length 66 [2021-12-14 16:01:49,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:49,333 INFO L470 AbstractCegarLoop]: Abstraction has 3928 states and 5883 transitions. [2021-12-14 16:01:49,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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) [2021-12-14 16:01:49,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 5883 transitions. [2021-12-14 16:01:49,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:01:49,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:49,339 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:01:49,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:01:49,340 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:49,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:49,340 INFO L85 PathProgramCache]: Analyzing trace with hash -366937100, now seen corresponding path program 1 times [2021-12-14 16:01:49,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:49,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870255774] [2021-12-14 16:01:49,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:49,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:01:49,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:49,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870255774] [2021-12-14 16:01:49,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870255774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:49,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:49,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:49,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390529674] [2021-12-14 16:01:49,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:49,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:49,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:49,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:49,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:49,403 INFO L87 Difference]: Start difference. First operand 3928 states and 5883 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:49,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:49,540 INFO L93 Difference]: Finished difference Result 5328 states and 7855 transitions. [2021-12-14 16:01:49,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:01:49,540 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 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 66 [2021-12-14 16:01:49,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:49,548 INFO L225 Difference]: With dead ends: 5328 [2021-12-14 16:01:49,548 INFO L226 Difference]: Without dead ends: 4862 [2021-12-14 16:01:49,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:01:49,551 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3074 mSDsluCounter, 1647 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3074 SdHoareTripleChecker+Valid, 3215 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:49,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3074 Valid, 3215 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:49,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4862 states. [2021-12-14 16:01:49,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4862 to 4392. [2021-12-14 16:01:49,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4392 states, 4390 states have (on average 1.4876993166287016) internal successors, (6531), 4391 states have internal predecessors, (6531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4392 states to 4392 states and 6531 transitions. [2021-12-14 16:01:49,672 INFO L78 Accepts]: Start accepts. Automaton has 4392 states and 6531 transitions. Word has length 66 [2021-12-14 16:01:49,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:49,672 INFO L470 AbstractCegarLoop]: Abstraction has 4392 states and 6531 transitions. [2021-12-14 16:01:49,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:49,673 INFO L276 IsEmpty]: Start isEmpty. Operand 4392 states and 6531 transitions. [2021-12-14 16:01:49,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 16:01:49,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:49,674 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] [2021-12-14 16:01:49,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:01:49,674 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:49,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:49,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1328887140, now seen corresponding path program 1 times [2021-12-14 16:01:49,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:49,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149334976] [2021-12-14 16:01:49,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:49,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:49,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:49,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149334976] [2021-12-14 16:01:49,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149334976] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:01:49,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170608607] [2021-12-14 16:01:49,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:49,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:01:49,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:01:49,868 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) [2021-12-14 16:01:49,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:01:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:49,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 16:01:49,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:01:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:01:50,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:01:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:01:50,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170608607] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:01:50,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:01:50,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-14 16:01:50,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060092515] [2021-12-14 16:01:50,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:01:50,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 16:01:50,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:50,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 16:01:50,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-14 16:01:50,391 INFO L87 Difference]: Start difference. First operand 4392 states and 6531 transitions. Second operand has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:52,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:52,992 INFO L93 Difference]: Finished difference Result 23693 states and 32924 transitions. [2021-12-14 16:01:52,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-14 16:01:52,993 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 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 67 [2021-12-14 16:01:52,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:53,028 INFO L225 Difference]: With dead ends: 23693 [2021-12-14 16:01:53,029 INFO L226 Difference]: Without dead ends: 21603 [2021-12-14 16:01:53,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1015, Invalid=4837, Unknown=0, NotChecked=0, Total=5852 [2021-12-14 16:01:53,041 INFO L933 BasicCegarLoop]: 1567 mSDtfsCounter, 16498 mSDsluCounter, 5321 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16498 SdHoareTripleChecker+Valid, 6888 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:53,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16498 Valid, 6888 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 16:01:53,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21603 states. [2021-12-14 16:01:53,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21603 to 13256. [2021-12-14 16:01:53,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13256 states, 13254 states have (on average 1.3731703636637995) internal successors, (18200), 13255 states have internal predecessors, (18200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13256 states to 13256 states and 18200 transitions. [2021-12-14 16:01:53,574 INFO L78 Accepts]: Start accepts. Automaton has 13256 states and 18200 transitions. Word has length 67 [2021-12-14 16:01:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:53,574 INFO L470 AbstractCegarLoop]: Abstraction has 13256 states and 18200 transitions. [2021-12-14 16:01:53,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 13256 states and 18200 transitions. [2021-12-14 16:01:53,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:01:53,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:53,575 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] [2021-12-14 16:01:53,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 16:01:53,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-14 16:01:53,792 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:53,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:53,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1627365196, now seen corresponding path program 1 times [2021-12-14 16:01:53,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:53,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259727061] [2021-12-14 16:01:53,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:53,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:53,954 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:53,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:53,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259727061] [2021-12-14 16:01:53,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259727061] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:01:53,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098061950] [2021-12-14 16:01:53,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:53,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:01:53,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:01:53,960 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) [2021-12-14 16:01:53,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 16:01:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:54,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 16:01:54,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:01:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:54,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:01:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:55,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098061950] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:01:55,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:01:55,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2021-12-14 16:01:55,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279065646] [2021-12-14 16:01:55,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:01:55,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-14 16:01:55,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:55,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-14 16:01:55,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-12-14 16:01:55,026 INFO L87 Difference]: Start difference. First operand 13256 states and 18200 transitions. Second operand has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:58,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:58,583 INFO L93 Difference]: Finished difference Result 69828 states and 92526 transitions. [2021-12-14 16:01:58,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-14 16:01:58,584 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 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 68 [2021-12-14 16:01:58,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:58,692 INFO L225 Difference]: With dead ends: 69828 [2021-12-14 16:01:58,692 INFO L226 Difference]: Without dead ends: 60560 [2021-12-14 16:01:58,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1354, Invalid=4048, Unknown=0, NotChecked=0, Total=5402 [2021-12-14 16:01:58,716 INFO L933 BasicCegarLoop]: 1548 mSDtfsCounter, 15784 mSDsluCounter, 6653 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15784 SdHoareTripleChecker+Valid, 8201 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:58,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15784 Valid, 8201 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 16:01:58,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60560 states. [2021-12-14 16:02:00,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60560 to 27725. [2021-12-14 16:02:00,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27725 states, 27723 states have (on average 1.3488799913429284) internal successors, (37395), 27724 states have internal predecessors, (37395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:00,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27725 states to 27725 states and 37395 transitions. [2021-12-14 16:02:00,284 INFO L78 Accepts]: Start accepts. Automaton has 27725 states and 37395 transitions. Word has length 68 [2021-12-14 16:02:00,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:02:00,284 INFO L470 AbstractCegarLoop]: Abstraction has 27725 states and 37395 transitions. [2021-12-14 16:02:00,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:00,284 INFO L276 IsEmpty]: Start isEmpty. Operand 27725 states and 37395 transitions. [2021-12-14 16:02:00,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:02:00,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:02:00,286 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:02:00,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 16:02:00,499 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,SelfDestructingSolverStorable15 [2021-12-14 16:02:00,500 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:02:00,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:02:00,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1374174942, now seen corresponding path program 1 times [2021-12-14 16:02:00,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:02:00,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857515377] [2021-12-14 16:02:00,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:00,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:02:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:02:00,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:02:00,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857515377] [2021-12-14 16:02:00,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857515377] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:02:00,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620071648] [2021-12-14 16:02:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:00,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:02:00,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:02:00,634 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) [2021-12-14 16:02:00,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 16:02:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:00,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 16:02:00,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:02:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:02:01,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:02:01,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:02:01,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620071648] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:02:01,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:02:01,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-14 16:02:01,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610370794] [2021-12-14 16:02:01,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:02:01,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-14 16:02:01,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:02:01,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-14 16:02:01,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-12-14 16:02:01,677 INFO L87 Difference]: Start difference. First operand 27725 states and 37395 transitions. Second operand has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:06,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:02:06,575 INFO L93 Difference]: Finished difference Result 115116 states and 151844 transitions. [2021-12-14 16:02:06,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-14 16:02:06,575 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-14 16:02:06,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:02:06,723 INFO L225 Difference]: With dead ends: 115116 [2021-12-14 16:02:06,724 INFO L226 Difference]: Without dead ends: 92893 [2021-12-14 16:02:06,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=1396, Unknown=0, NotChecked=0, Total=1892 [2021-12-14 16:02:06,769 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 9279 mSDsluCounter, 6447 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9279 SdHoareTripleChecker+Valid, 7978 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:02:06,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9279 Valid, 7978 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:02:06,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92893 states. [2021-12-14 16:02:09,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92893 to 54762. [2021-12-14 16:02:09,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54762 states, 54760 states have (on average 1.3223338203067934) internal successors, (72411), 54761 states have internal predecessors, (72411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:09,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54762 states to 54762 states and 72411 transitions. [2021-12-14 16:02:09,948 INFO L78 Accepts]: Start accepts. Automaton has 54762 states and 72411 transitions. Word has length 68 [2021-12-14 16:02:09,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:02:09,949 INFO L470 AbstractCegarLoop]: Abstraction has 54762 states and 72411 transitions. [2021-12-14 16:02:09,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:09,949 INFO L276 IsEmpty]: Start isEmpty. Operand 54762 states and 72411 transitions. [2021-12-14 16:02:09,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:02:09,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:02:09,950 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:02:09,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 16:02:10,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:02:10,151 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:02:10,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:02:10,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1702537876, now seen corresponding path program 1 times [2021-12-14 16:02:10,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:02:10,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462752973] [2021-12-14 16:02:10,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:10,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:02:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:02:10,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:02:10,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462752973] [2021-12-14 16:02:10,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462752973] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:02:10,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:02:10,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:02:10,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150263255] [2021-12-14 16:02:10,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:02:10,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:02:10,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:02:10,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:02:10,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:02:10,185 INFO L87 Difference]: Start difference. First operand 54762 states and 72411 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:11,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:02:11,688 INFO L93 Difference]: Finished difference Result 79200 states and 103954 transitions. [2021-12-14 16:02:11,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:02:11,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-14 16:02:11,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:02:11,730 INFO L225 Difference]: With dead ends: 79200 [2021-12-14 16:02:11,731 INFO L226 Difference]: Without dead ends: 32120 [2021-12-14 16:02:11,763 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 [2021-12-14 16:02:11,764 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 26 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 3030 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 [2021-12-14 16:02:11,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 3030 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:02:11,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32120 states. [2021-12-14 16:02:13,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32120 to 31692. [2021-12-14 16:02:13,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31692 states, 31690 states have (on average 1.2937519722309876) internal successors, (40999), 31691 states have internal predecessors, (40999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:13,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31692 states to 31692 states and 40999 transitions. [2021-12-14 16:02:13,554 INFO L78 Accepts]: Start accepts. Automaton has 31692 states and 40999 transitions. Word has length 68 [2021-12-14 16:02:13,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:02:13,554 INFO L470 AbstractCegarLoop]: Abstraction has 31692 states and 40999 transitions. [2021-12-14 16:02:13,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:13,554 INFO L276 IsEmpty]: Start isEmpty. Operand 31692 states and 40999 transitions. [2021-12-14 16:02:13,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:02:13,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:02:13,556 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:02:13,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:02:13,556 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:02:13,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:02:13,556 INFO L85 PathProgramCache]: Analyzing trace with hash 455030260, now seen corresponding path program 1 times [2021-12-14 16:02:13,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:02:13,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304430139] [2021-12-14 16:02:13,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:13,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:02:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:02:13,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:02:13,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304430139] [2021-12-14 16:02:13,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304430139] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:02:13,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:02:13,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:02:13,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149013322] [2021-12-14 16:02:13,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:02:13,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:02:13,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:02:13,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:02:13,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:02:13,578 INFO L87 Difference]: Start difference. First operand 31692 states and 40999 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:14,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:02:14,427 INFO L93 Difference]: Finished difference Result 47678 states and 61213 transitions. [2021-12-14 16:02:14,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:02:14,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-14 16:02:14,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:02:14,451 INFO L225 Difference]: With dead ends: 47678 [2021-12-14 16:02:14,451 INFO L226 Difference]: Without dead ends: 21614 [2021-12-14 16:02:14,469 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 [2021-12-14 16:02:14,469 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 20 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 3021 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 [2021-12-14 16:02:14,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 3021 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:02:14,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21614 states. [2021-12-14 16:02:15,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21614 to 21612. [2021-12-14 16:02:15,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21612 states, 21610 states have (on average 1.2752429430819066) internal successors, (27558), 21611 states have internal predecessors, (27558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21612 states to 21612 states and 27558 transitions. [2021-12-14 16:02:15,336 INFO L78 Accepts]: Start accepts. Automaton has 21612 states and 27558 transitions. Word has length 68 [2021-12-14 16:02:15,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:02:15,336 INFO L470 AbstractCegarLoop]: Abstraction has 21612 states and 27558 transitions. [2021-12-14 16:02:15,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:15,337 INFO L276 IsEmpty]: Start isEmpty. Operand 21612 states and 27558 transitions. [2021-12-14 16:02:15,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:02:15,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:02:15,338 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:02:15,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:02:15,338 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:02:15,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:02:15,339 INFO L85 PathProgramCache]: Analyzing trace with hash 530169440, now seen corresponding path program 1 times [2021-12-14 16:02:15,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:02:15,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633130654] [2021-12-14 16:02:15,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:15,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:02:15,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 16:02:15,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:02:15,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633130654] [2021-12-14 16:02:15,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633130654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:02:15,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:02:15,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:02:15,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248203901] [2021-12-14 16:02:15,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:02:15,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:02:15,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:02:15,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:02:15,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:02:15,424 INFO L87 Difference]: Start difference. First operand 21612 states and 27558 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:16,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:02:16,153 INFO L93 Difference]: Finished difference Result 37375 states and 47283 transitions. [2021-12-14 16:02:16,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:02:16,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 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 68 [2021-12-14 16:02:16,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:02:16,176 INFO L225 Difference]: With dead ends: 37375 [2021-12-14 16:02:16,176 INFO L226 Difference]: Without dead ends: 18128 [2021-12-14 16:02:16,194 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 [2021-12-14 16:02:16,196 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4553 mSDsluCounter, 1464 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4553 SdHoareTripleChecker+Valid, 2957 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:02:16,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4553 Valid, 2957 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:02:16,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18128 states. [2021-12-14 16:02:16,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18128 to 18128. [2021-12-14 16:02:16,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18128 states, 18126 states have (on average 1.267240428114311) internal successors, (22970), 18127 states have internal predecessors, (22970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:16,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18128 states to 18128 states and 22970 transitions. [2021-12-14 16:02:16,974 INFO L78 Accepts]: Start accepts. Automaton has 18128 states and 22970 transitions. Word has length 68 [2021-12-14 16:02:16,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:02:16,975 INFO L470 AbstractCegarLoop]: Abstraction has 18128 states and 22970 transitions. [2021-12-14 16:02:16,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:16,975 INFO L276 IsEmpty]: Start isEmpty. Operand 18128 states and 22970 transitions. [2021-12-14 16:02:16,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:02:16,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:02:16,976 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:02:16,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:02:16,977 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:02:16,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:02:16,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1360814688, now seen corresponding path program 1 times [2021-12-14 16:02:16,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:02:16,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716328727] [2021-12-14 16:02:16,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:16,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:02:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 16:02:17,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:02:17,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716328727] [2021-12-14 16:02:17,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716328727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:02:17,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:02:17,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:02:17,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312639964] [2021-12-14 16:02:17,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:02:17,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:02:17,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:02:17,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:02:17,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:02:17,027 INFO L87 Difference]: Start difference. First operand 18128 states and 22970 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:17,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:02:17,796 INFO L93 Difference]: Finished difference Result 29739 states and 37221 transitions. [2021-12-14 16:02:17,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:02:17,797 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 68 [2021-12-14 16:02:17,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:02:17,813 INFO L225 Difference]: With dead ends: 29739 [2021-12-14 16:02:17,814 INFO L226 Difference]: Without dead ends: 14008 [2021-12-14 16:02:17,827 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 [2021-12-14 16:02:17,828 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4513 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4513 SdHoareTripleChecker+Valid, 2962 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:02:17,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4513 Valid, 2962 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:02:17,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14008 states. [2021-12-14 16:02:18,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14008 to 14008. [2021-12-14 16:02:18,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14008 states, 14006 states have (on average 1.262958731972012) internal successors, (17689), 14007 states have internal predecessors, (17689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:18,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14008 states to 14008 states and 17689 transitions. [2021-12-14 16:02:18,469 INFO L78 Accepts]: Start accepts. Automaton has 14008 states and 17689 transitions. Word has length 68 [2021-12-14 16:02:18,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:02:18,469 INFO L470 AbstractCegarLoop]: Abstraction has 14008 states and 17689 transitions. [2021-12-14 16:02:18,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:18,470 INFO L276 IsEmpty]: Start isEmpty. Operand 14008 states and 17689 transitions. [2021-12-14 16:02:18,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:02:18,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:02:18,471 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:02:18,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:02:18,471 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:02:18,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:02:18,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1355942016, now seen corresponding path program 1 times [2021-12-14 16:02:18,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:02:18,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14662360] [2021-12-14 16:02:18,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:18,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:02:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 16:02:18,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:02:18,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14662360] [2021-12-14 16:02:18,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14662360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:02:18,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:02:18,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:02:18,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705232807] [2021-12-14 16:02:18,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:02:18,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:02:18,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:02:18,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:02:18,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:02:18,503 INFO L87 Difference]: Start difference. First operand 14008 states and 17689 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:19,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:02:19,033 INFO L93 Difference]: Finished difference Result 23014 states and 28614 transitions. [2021-12-14 16:02:19,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:02:19,035 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 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 68 [2021-12-14 16:02:19,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:02:19,047 INFO L225 Difference]: With dead ends: 23014 [2021-12-14 16:02:19,047 INFO L226 Difference]: Without dead ends: 11324 [2021-12-14 16:02:19,055 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 [2021-12-14 16:02:19,056 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4519 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4519 SdHoareTripleChecker+Valid, 2956 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:02:19,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4519 Valid, 2956 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:02:19,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11324 states. [2021-12-14 16:02:19,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11324 to 11324. [2021-12-14 16:02:19,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11324 states, 11322 states have (on average 1.2692103868574456) internal successors, (14370), 11323 states have internal predecessors, (14370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:19,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11324 states to 11324 states and 14370 transitions. [2021-12-14 16:02:19,531 INFO L78 Accepts]: Start accepts. Automaton has 11324 states and 14370 transitions. Word has length 68 [2021-12-14 16:02:19,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:02:19,531 INFO L470 AbstractCegarLoop]: Abstraction has 11324 states and 14370 transitions. [2021-12-14 16:02:19,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:19,531 INFO L276 IsEmpty]: Start isEmpty. Operand 11324 states and 14370 transitions. [2021-12-14 16:02:19,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 16:02:19,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:02:19,532 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:02:19,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 16:02:19,532 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:02:19,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:02:19,532 INFO L85 PathProgramCache]: Analyzing trace with hash -576881103, now seen corresponding path program 1 times [2021-12-14 16:02:19,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:02:19,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680123084] [2021-12-14 16:02:19,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:19,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:02:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:02:20,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:02:20,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680123084] [2021-12-14 16:02:20,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680123084] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:02:20,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554637090] [2021-12-14 16:02:20,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:20,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:02:20,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:02:20,077 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:02:20,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 16:02:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:20,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-14 16:02:20,166 INFO L286 TraceCheckSpWp]: Computing forward predicates...