./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.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/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.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 075767edbb592d061c1d85f41edb41733b674c2f33a2c1741ae50b9eba126551 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 15:17:13,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 15:17:13,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 15:17:13,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 15:17:13,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 15:17:13,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 15:17:13,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 15:17:13,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 15:17:13,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 15:17:13,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 15:17:13,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 15:17:13,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 15:17:13,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 15:17:13,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 15:17:13,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 15:17:13,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 15:17:13,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 15:17:13,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 15:17:13,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 15:17:13,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 15:17:13,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 15:17:13,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 15:17:13,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 15:17:13,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 15:17:13,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 15:17:13,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 15:17:13,603 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 15:17:13,609 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 15:17:13,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 15:17:13,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 15:17:13,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 15:17:13,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 15:17:13,613 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 15:17:13,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 15:17:13,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 15:17:13,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 15:17:13,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 15:17:13,615 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 15:17:13,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 15:17:13,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 15:17:13,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 15:17:13,617 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 15:17:13,651 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 15:17:13,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 15:17:13,652 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 15:17:13,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 15:17:13,653 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 15:17:13,653 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 15:17:13,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 15:17:13,654 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 15:17:13,654 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 15:17:13,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 15:17:13,654 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 15:17:13,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 15:17:13,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 15:17:13,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 15:17:13,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 15:17:13,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 15:17:13,655 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 15:17:13,655 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 15:17:13,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 15:17:13,660 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 15:17:13,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 15:17:13,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 15:17:13,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 15:17:13,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 15:17:13,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:17:13,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 15:17:13,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 15:17:13,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 15:17:13,661 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 15:17:13,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 15:17:13,661 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 15:17:13,661 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 15:17:13,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 15:17:13,662 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 15:17:13,662 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 075767edbb592d061c1d85f41edb41733b674c2f33a2c1741ae50b9eba126551 [2021-12-14 15:17:13,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 15:17:13,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 15:17:13,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 15:17:13,879 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 15:17:13,879 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 15:17:13,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-12-14 15:17:13,944 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51c53aed3/0f15da5e9ec044eab1026e967a73657b/FLAG4f30817ec [2021-12-14 15:17:14,312 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 15:17:14,313 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-12-14 15:17:14,324 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51c53aed3/0f15da5e9ec044eab1026e967a73657b/FLAG4f30817ec [2021-12-14 15:17:14,705 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51c53aed3/0f15da5e9ec044eab1026e967a73657b [2021-12-14 15:17:14,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 15:17:14,708 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 15:17:14,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 15:17:14,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 15:17:14,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 15:17:14,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:17:14" (1/1) ... [2021-12-14 15:17:14,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fef0eb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:17:14, skipping insertion in model container [2021-12-14 15:17:14,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:17:14" (1/1) ... [2021-12-14 15:17:14,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 15:17:14,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 15:17:14,892 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/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[6780,6793] [2021-12-14 15:17:14,920 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:17:14,930 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 15:17:14,967 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/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[6780,6793] [2021-12-14 15:17:14,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:17:15,006 INFO L208 MainTranslator]: Completed translation [2021-12-14 15:17:15,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:17:15 WrapperNode [2021-12-14 15:17:15,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 15:17:15,008 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 15:17:15,008 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 15:17:15,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 15:17:15,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:17:15" (1/1) ... [2021-12-14 15:17:15,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:17:15" (1/1) ... [2021-12-14 15:17:15,060 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 529 [2021-12-14 15:17:15,061 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 15:17:15,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 15:17:15,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 15:17:15,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 15:17:15,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:17:15" (1/1) ... [2021-12-14 15:17:15,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:17:15" (1/1) ... [2021-12-14 15:17:15,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:17:15" (1/1) ... [2021-12-14 15:17:15,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:17:15" (1/1) ... [2021-12-14 15:17:15,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:17:15" (1/1) ... [2021-12-14 15:17:15,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:17:15" (1/1) ... [2021-12-14 15:17:15,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:17:15" (1/1) ... [2021-12-14 15:17:15,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 15:17:15,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 15:17:15,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 15:17:15,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 15:17:15,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:17:15" (1/1) ... [2021-12-14 15:17:15,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:17:15,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:17:15,125 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 15:17:15,133 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 15:17:15,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 15:17:15,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 15:17:15,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 15:17:15,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 15:17:15,233 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 15:17:15,235 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 15:17:15,639 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 15:17:15,644 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 15:17:15,645 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 15:17:15,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:17:15 BoogieIcfgContainer [2021-12-14 15:17:15,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 15:17:15,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 15:17:15,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 15:17:15,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 15:17:15,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:17:14" (1/3) ... [2021-12-14 15:17:15,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544178c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:17:15, skipping insertion in model container [2021-12-14 15:17:15,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:17:15" (2/3) ... [2021-12-14 15:17:15,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544178c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:17:15, skipping insertion in model container [2021-12-14 15:17:15,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:17:15" (3/3) ... [2021-12-14 15:17:15,654 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-12-14 15:17:15,658 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 15:17:15,658 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 15:17:15,701 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 15:17:15,707 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 15:17:15,707 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 15:17:15,719 INFO L276 IsEmpty]: Start isEmpty. Operand has 123 states, 121 states have (on average 1.7520661157024793) internal successors, (212), 122 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 15:17:15,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-14 15:17:15,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:15,726 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] [2021-12-14 15:17:15,726 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:15,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:15,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1296157629, now seen corresponding path program 1 times [2021-12-14 15:17:15,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:15,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978480409] [2021-12-14 15:17:15,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:15,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:16,072 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 15:17:16,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:16,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978480409] [2021-12-14 15:17:16,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978480409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:16,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:16,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:17:16,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184100514] [2021-12-14 15:17:16,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:16,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:17:16,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:16,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:17:16,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:17:16,104 INFO L87 Difference]: Start difference. First operand has 123 states, 121 states have (on average 1.7520661157024793) internal successors, (212), 122 states have internal predecessors, (212), 0 states have call successors, (0), 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 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 15:17:16,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:16,356 INFO L93 Difference]: Finished difference Result 589 states and 942 transitions. [2021-12-14 15:17:16,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 15:17:16,359 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-12-14 15:17:16,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:16,374 INFO L225 Difference]: With dead ends: 589 [2021-12-14 15:17:16,375 INFO L226 Difference]: Without dead ends: 511 [2021-12-14 15:17:16,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-14 15:17:16,379 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 910 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:16,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [910 Valid, 1605 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:17:16,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-12-14 15:17:16,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 185. [2021-12-14 15:17:16,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.451086956521739) internal successors, (267), 184 states have internal predecessors, (267), 0 states have call successors, (0), 0 states 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 15:17:16,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 267 transitions. [2021-12-14 15:17:16,424 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 267 transitions. Word has length 62 [2021-12-14 15:17:16,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:16,424 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 267 transitions. [2021-12-14 15:17:16,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 15:17:16,425 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 267 transitions. [2021-12-14 15:17:16,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 15:17:16,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:16,426 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, 1] [2021-12-14 15:17:16,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 15:17:16,426 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:16,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:16,427 INFO L85 PathProgramCache]: Analyzing trace with hash -574954446, now seen corresponding path program 1 times [2021-12-14 15:17:16,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:16,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417535935] [2021-12-14 15:17:16,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:16,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:16,509 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 15:17:16,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:16,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417535935] [2021-12-14 15:17:16,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417535935] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:16,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:16,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:17:16,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115230606] [2021-12-14 15:17:16,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:16,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:17:16,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:16,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:17:16,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:17:16,512 INFO L87 Difference]: Start difference. First operand 185 states and 267 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 15:17:16,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:16,617 INFO L93 Difference]: Finished difference Result 654 states and 1000 transitions. [2021-12-14 15:17:16,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:17:16,618 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 64 [2021-12-14 15:17:16,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:16,620 INFO L225 Difference]: With dead ends: 654 [2021-12-14 15:17:16,620 INFO L226 Difference]: Without dead ends: 554 [2021-12-14 15:17:16,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 15:17:16,629 INFO L933 BasicCegarLoop]: 394 mSDtfsCounter, 520 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:16,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 1030 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:17:16,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-12-14 15:17:16,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 294. [2021-12-14 15:17:16,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 1.4982935153583619) internal successors, (439), 293 states have internal predecessors, (439), 0 states have call successors, (0), 0 states 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 15:17:16,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 439 transitions. [2021-12-14 15:17:16,667 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 439 transitions. Word has length 64 [2021-12-14 15:17:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:16,668 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 439 transitions. [2021-12-14 15:17:16,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 15:17:16,668 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 439 transitions. [2021-12-14 15:17:16,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 15:17:16,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:16,674 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, 1] [2021-12-14 15:17:16,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 15:17:16,676 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:16,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:16,677 INFO L85 PathProgramCache]: Analyzing trace with hash -254559290, now seen corresponding path program 1 times [2021-12-14 15:17:16,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:16,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417906012] [2021-12-14 15:17:16,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:16,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:17:16,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:16,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417906012] [2021-12-14 15:17:16,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417906012] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:16,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:16,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:17:16,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754070346] [2021-12-14 15:17:16,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:16,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:17:16,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:16,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:17:16,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:17:16,781 INFO L87 Difference]: Start difference. First operand 294 states and 439 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 15:17:16,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:16,888 INFO L93 Difference]: Finished difference Result 763 states and 1172 transitions. [2021-12-14 15:17:16,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:17:16,889 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 64 [2021-12-14 15:17:16,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:16,893 INFO L225 Difference]: With dead ends: 763 [2021-12-14 15:17:16,893 INFO L226 Difference]: Without dead ends: 663 [2021-12-14 15:17:16,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 15:17:16,902 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 598 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:16,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 868 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:17:16,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-12-14 15:17:16,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 447. [2021-12-14 15:17:16,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.5246636771300448) internal successors, (680), 446 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 15:17:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 680 transitions. [2021-12-14 15:17:16,924 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 680 transitions. Word has length 64 [2021-12-14 15:17:16,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:16,924 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 680 transitions. [2021-12-14 15:17:16,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 15:17:16,924 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 680 transitions. [2021-12-14 15:17:16,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 15:17:16,925 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:16,925 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, 1] [2021-12-14 15:17:16,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 15:17:16,925 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:16,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:16,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1989488918, now seen corresponding path program 1 times [2021-12-14 15:17:16,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:16,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493281973] [2021-12-14 15:17:16,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:16,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:17,002 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 15:17:17,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:17,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493281973] [2021-12-14 15:17:17,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493281973] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:17,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:17,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:17:17,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189530783] [2021-12-14 15:17:17,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:17,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:17:17,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:17,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:17:17,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:17:17,004 INFO L87 Difference]: Start difference. First operand 447 states and 680 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 15:17:17,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:17,091 INFO L93 Difference]: Finished difference Result 862 states and 1328 transitions. [2021-12-14 15:17:17,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:17:17,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 64 [2021-12-14 15:17:17,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:17,095 INFO L225 Difference]: With dead ends: 862 [2021-12-14 15:17:17,095 INFO L226 Difference]: Without dead ends: 762 [2021-12-14 15:17:17,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 15:17:17,101 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 677 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:17,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 780 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:17:17,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-12-14 15:17:17,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 546. [2021-12-14 15:17:17,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 1.5339449541284405) internal successors, (836), 545 states have internal predecessors, (836), 0 states have call successors, (0), 0 states 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 15:17:17,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 836 transitions. [2021-12-14 15:17:17,122 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 836 transitions. Word has length 64 [2021-12-14 15:17:17,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:17,122 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 836 transitions. [2021-12-14 15:17:17,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 15:17:17,123 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 836 transitions. [2021-12-14 15:17:17,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 15:17:17,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:17,125 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, 1] [2021-12-14 15:17:17,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 15:17:17,125 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:17,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:17,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1188595012, now seen corresponding path program 1 times [2021-12-14 15:17:17,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:17,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610696711] [2021-12-14 15:17:17,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:17,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:17,164 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 15:17:17,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:17,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610696711] [2021-12-14 15:17:17,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610696711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:17,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:17,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:17:17,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402222147] [2021-12-14 15:17:17,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:17,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:17:17,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:17,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:17:17,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:17:17,168 INFO L87 Difference]: Start difference. First operand 546 states and 836 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 15:17:17,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:17,224 INFO L93 Difference]: Finished difference Result 1374 states and 2132 transitions. [2021-12-14 15:17:17,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:17:17,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 64 [2021-12-14 15:17:17,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:17,228 INFO L225 Difference]: With dead ends: 1374 [2021-12-14 15:17:17,228 INFO L226 Difference]: Without dead ends: 931 [2021-12-14 15:17:17,229 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 15:17:17,230 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 67 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:17,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 380 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:17:17,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-12-14 15:17:17,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2021-12-14 15:17:17,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 1.5237068965517242) internal successors, (1414), 928 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states 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 15:17:17,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1414 transitions. [2021-12-14 15:17:17,262 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1414 transitions. Word has length 64 [2021-12-14 15:17:17,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:17,263 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 1414 transitions. [2021-12-14 15:17:17,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 15:17:17,266 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1414 transitions. [2021-12-14 15:17:17,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 15:17:17,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:17,267 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, 1] [2021-12-14 15:17:17,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 15:17:17,267 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:17,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:17,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1017922373, now seen corresponding path program 1 times [2021-12-14 15:17:17,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:17,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368700967] [2021-12-14 15:17:17,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:17,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:17,400 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 15:17:17,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:17,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368700967] [2021-12-14 15:17:17,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368700967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:17,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:17,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:17:17,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766377741] [2021-12-14 15:17:17,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:17,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:17:17,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:17,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:17:17,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:17:17,402 INFO L87 Difference]: Start difference. First operand 929 states and 1414 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 15:17:17,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:17,514 INFO L93 Difference]: Finished difference Result 1757 states and 2692 transitions. [2021-12-14 15:17:17,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:17:17,514 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 64 [2021-12-14 15:17:17,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:17,517 INFO L225 Difference]: With dead ends: 1757 [2021-12-14 15:17:17,517 INFO L226 Difference]: Without dead ends: 931 [2021-12-14 15:17:17,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:17:17,518 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 332 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:17,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 520 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:17:17,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-12-14 15:17:17,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2021-12-14 15:17:17,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 1.5183189655172413) internal successors, (1409), 928 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states 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 15:17:17,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1409 transitions. [2021-12-14 15:17:17,551 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1409 transitions. Word has length 64 [2021-12-14 15:17:17,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:17,552 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 1409 transitions. [2021-12-14 15:17:17,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 15:17:17,552 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1409 transitions. [2021-12-14 15:17:17,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 15:17:17,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:17,553 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, 1] [2021-12-14 15:17:17,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 15:17:17,553 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:17,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:17,553 INFO L85 PathProgramCache]: Analyzing trace with hash 145774506, now seen corresponding path program 1 times [2021-12-14 15:17:17,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:17,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108114574] [2021-12-14 15:17:17,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:17,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:17,596 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 15:17:17,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:17,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108114574] [2021-12-14 15:17:17,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108114574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:17,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:17,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:17:17,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275404545] [2021-12-14 15:17:17,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:17,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:17:17,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:17,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:17:17,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:17:17,599 INFO L87 Difference]: Start difference. First operand 929 states and 1409 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 15:17:17,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:17,704 INFO L93 Difference]: Finished difference Result 1689 states and 2577 transitions. [2021-12-14 15:17:17,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:17:17,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 64 [2021-12-14 15:17:17,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:17,708 INFO L225 Difference]: With dead ends: 1689 [2021-12-14 15:17:17,708 INFO L226 Difference]: Without dead ends: 1504 [2021-12-14 15:17:17,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 15:17:17,709 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 646 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:17,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 926 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:17:17,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2021-12-14 15:17:17,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1123. [2021-12-14 15:17:17,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1122 states have (on average 1.5222816399286987) internal successors, (1708), 1122 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states 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 15:17:17,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1708 transitions. [2021-12-14 15:17:17,755 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1708 transitions. Word has length 64 [2021-12-14 15:17:17,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:17,755 INFO L470 AbstractCegarLoop]: Abstraction has 1123 states and 1708 transitions. [2021-12-14 15:17:17,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 15:17:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1708 transitions. [2021-12-14 15:17:17,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 15:17:17,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:17,757 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, 1, 1] [2021-12-14 15:17:17,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 15:17:17,757 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:17,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:17,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1968503380, now seen corresponding path program 1 times [2021-12-14 15:17:17,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:17,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407541619] [2021-12-14 15:17:17,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:17,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:17,794 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 15:17:17,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:17,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407541619] [2021-12-14 15:17:17,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407541619] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:17,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:17,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:17:17,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592321730] [2021-12-14 15:17:17,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:17,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:17:17,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:17,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:17:17,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:17:17,796 INFO L87 Difference]: Start difference. First operand 1123 states and 1708 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 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 15:17:17,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:17,986 INFO L93 Difference]: Finished difference Result 3265 states and 5000 transitions. [2021-12-14 15:17:17,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:17:17,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 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 65 [2021-12-14 15:17:17,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:17,993 INFO L225 Difference]: With dead ends: 3265 [2021-12-14 15:17:17,993 INFO L226 Difference]: Without dead ends: 2172 [2021-12-14 15:17:17,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:17:17,995 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 651 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:17,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 144 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:17:17,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-12-14 15:17:18,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 2170. [2021-12-14 15:17:18,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 1.5209774089442138) internal successors, (3299), 2169 states have internal predecessors, (3299), 0 states have call successors, (0), 0 states 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 15:17:18,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 3299 transitions. [2021-12-14 15:17:18,086 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 3299 transitions. Word has length 65 [2021-12-14 15:17:18,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:18,086 INFO L470 AbstractCegarLoop]: Abstraction has 2170 states and 3299 transitions. [2021-12-14 15:17:18,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 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 15:17:18,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 3299 transitions. [2021-12-14 15:17:18,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 15:17:18,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:18,093 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, 1, 1, 1] [2021-12-14 15:17:18,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 15:17:18,094 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:18,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:18,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1032507974, now seen corresponding path program 1 times [2021-12-14 15:17:18,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:18,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269640443] [2021-12-14 15:17:18,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:18,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:18,129 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 15:17:18,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:18,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269640443] [2021-12-14 15:17:18,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269640443] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:18,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:18,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:17:18,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371583814] [2021-12-14 15:17:18,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:18,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:17:18,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:18,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:17:18,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:17:18,132 INFO L87 Difference]: Start difference. First operand 2170 states and 3299 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 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 15:17:18,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:18,291 INFO L93 Difference]: Finished difference Result 4298 states and 6553 transitions. [2021-12-14 15:17:18,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:17:18,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 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 15:17:18,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:18,297 INFO L225 Difference]: With dead ends: 4298 [2021-12-14 15:17:18,297 INFO L226 Difference]: Without dead ends: 2170 [2021-12-14 15:17:18,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:17:18,300 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 410 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:18,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 113 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:17:18,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-12-14 15:17:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 2170. [2021-12-14 15:17:18,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 1.500230520977409) internal successors, (3254), 2169 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states 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 15:17:18,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 3254 transitions. [2021-12-14 15:17:18,388 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 3254 transitions. Word has length 66 [2021-12-14 15:17:18,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:18,388 INFO L470 AbstractCegarLoop]: Abstraction has 2170 states and 3254 transitions. [2021-12-14 15:17:18,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 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 15:17:18,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 3254 transitions. [2021-12-14 15:17:18,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 15:17:18,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:18,390 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, 1, 1, 1, 1] [2021-12-14 15:17:18,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 15:17:18,390 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:18,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:18,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1666418400, now seen corresponding path program 1 times [2021-12-14 15:17:18,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:18,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040850070] [2021-12-14 15:17:18,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:18,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:18,433 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 15:17:18,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:18,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040850070] [2021-12-14 15:17:18,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040850070] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:18,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:18,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:17:18,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055747977] [2021-12-14 15:17:18,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:18,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:17:18,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:18,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:17:18,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:17:18,435 INFO L87 Difference]: Start difference. First operand 2170 states and 3254 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 15:17:18,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:18,584 INFO L93 Difference]: Finished difference Result 4306 states and 6473 transitions. [2021-12-14 15:17:18,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:17:18,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 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 15:17:18,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:18,590 INFO L225 Difference]: With dead ends: 4306 [2021-12-14 15:17:18,590 INFO L226 Difference]: Without dead ends: 2170 [2021-12-14 15:17:18,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:17:18,593 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 426 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:18,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 97 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:17:18,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-12-14 15:17:18,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 2170. [2021-12-14 15:17:18,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 1.479483633010604) internal successors, (3209), 2169 states have internal predecessors, (3209), 0 states have call successors, (0), 0 states 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 15:17:18,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 3209 transitions. [2021-12-14 15:17:18,686 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 3209 transitions. Word has length 67 [2021-12-14 15:17:18,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:18,686 INFO L470 AbstractCegarLoop]: Abstraction has 2170 states and 3209 transitions. [2021-12-14 15:17:18,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 15:17:18,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 3209 transitions. [2021-12-14 15:17:18,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 15:17:18,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:18,687 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, 1, 1, 1, 1, 1] [2021-12-14 15:17:18,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 15:17:18,688 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:18,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:18,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1540735366, now seen corresponding path program 1 times [2021-12-14 15:17:18,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:18,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114234908] [2021-12-14 15:17:18,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:18,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:18,733 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 15:17:18,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:18,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114234908] [2021-12-14 15:17:18,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114234908] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:18,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:18,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:17:18,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253550536] [2021-12-14 15:17:18,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:18,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:17:18,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:18,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:17:18,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:17:18,736 INFO L87 Difference]: Start difference. First operand 2170 states and 3209 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 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 15:17:18,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:18,891 INFO L93 Difference]: Finished difference Result 4302 states and 6379 transitions. [2021-12-14 15:17:18,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:17:18,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 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 15:17:18,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:18,897 INFO L225 Difference]: With dead ends: 4302 [2021-12-14 15:17:18,898 INFO L226 Difference]: Without dead ends: 2170 [2021-12-14 15:17:18,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:17:18,900 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 408 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:18,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 105 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:17:18,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-12-14 15:17:19,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 2170. [2021-12-14 15:17:19,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 1.458736745043799) internal successors, (3164), 2169 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states 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 15:17:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 3164 transitions. [2021-12-14 15:17:19,034 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 3164 transitions. Word has length 68 [2021-12-14 15:17:19,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:19,034 INFO L470 AbstractCegarLoop]: Abstraction has 2170 states and 3164 transitions. [2021-12-14 15:17:19,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 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 15:17:19,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 3164 transitions. [2021-12-14 15:17:19,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 15:17:19,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:19,035 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, 1, 1, 1, 1, 1, 1] [2021-12-14 15:17:19,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 15:17:19,036 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:19,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:19,036 INFO L85 PathProgramCache]: Analyzing trace with hash -147544852, now seen corresponding path program 1 times [2021-12-14 15:17:19,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:19,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843863287] [2021-12-14 15:17:19,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:19,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:19,277 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 15:17:19,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:19,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843863287] [2021-12-14 15:17:19,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843863287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:19,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:19,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-14 15:17:19,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931426106] [2021-12-14 15:17:19,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:19,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 15:17:19,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:19,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 15:17:19,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-14 15:17:19,279 INFO L87 Difference]: Start difference. First operand 2170 states and 3164 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 15:17:19,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:19,915 INFO L93 Difference]: Finished difference Result 6338 states and 9224 transitions. [2021-12-14 15:17:19,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 15:17:19,918 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-12-14 15:17:19,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:19,933 INFO L225 Difference]: With dead ends: 6338 [2021-12-14 15:17:19,933 INFO L226 Difference]: Without dead ends: 4313 [2021-12-14 15:17:19,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-12-14 15:17:19,939 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 875 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:19,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 348 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 15:17:19,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4313 states. [2021-12-14 15:17:20,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4313 to 2170. [2021-12-14 15:17:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 1.454587367450438) internal successors, (3155), 2169 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states 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 15:17:20,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 3155 transitions. [2021-12-14 15:17:20,117 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 3155 transitions. Word has length 69 [2021-12-14 15:17:20,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:20,118 INFO L470 AbstractCegarLoop]: Abstraction has 2170 states and 3155 transitions. [2021-12-14 15:17:20,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 15:17:20,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 3155 transitions. [2021-12-14 15:17:20,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-14 15:17:20,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:20,119 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:17:20,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 15:17:20,119 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:20,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:20,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1891939923, now seen corresponding path program 1 times [2021-12-14 15:17:20,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:20,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437785125] [2021-12-14 15:17:20,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:20,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:20,244 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 15:17:20,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:20,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437785125] [2021-12-14 15:17:20,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437785125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:20,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:20,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 15:17:20,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659798018] [2021-12-14 15:17:20,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:20,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 15:17:20,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:20,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 15:17:20,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-14 15:17:20,247 INFO L87 Difference]: Start difference. First operand 2170 states and 3155 transitions. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:17:21,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:21,080 INFO L93 Difference]: Finished difference Result 5377 states and 7794 transitions. [2021-12-14 15:17:21,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 15:17:21,080 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-14 15:17:21,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:21,090 INFO L225 Difference]: With dead ends: 5377 [2021-12-14 15:17:21,090 INFO L226 Difference]: Without dead ends: 3307 [2021-12-14 15:17:21,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-12-14 15:17:21,093 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 1119 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:21,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1119 Valid, 393 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 15:17:21,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3307 states. [2021-12-14 15:17:21,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3307 to 2170. [2021-12-14 15:17:21,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 1.4532042415859843) internal successors, (3152), 2169 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states 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 15:17:21,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 3152 transitions. [2021-12-14 15:17:21,227 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 3152 transitions. Word has length 70 [2021-12-14 15:17:21,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:21,228 INFO L470 AbstractCegarLoop]: Abstraction has 2170 states and 3152 transitions. [2021-12-14 15:17:21,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:17:21,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 3152 transitions. [2021-12-14 15:17:21,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-14 15:17:21,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:21,229 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:17:21,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 15:17:21,229 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:21,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:21,229 INFO L85 PathProgramCache]: Analyzing trace with hash -761151707, now seen corresponding path program 1 times [2021-12-14 15:17:21,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:21,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281946427] [2021-12-14 15:17:21,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:21,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:21,320 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 15:17:21,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:21,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281946427] [2021-12-14 15:17:21,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281946427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:21,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:21,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 15:17:21,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112053063] [2021-12-14 15:17:21,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:21,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 15:17:21,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:21,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 15:17:21,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-14 15:17:21,323 INFO L87 Difference]: Start difference. First operand 2170 states and 3152 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:17:21,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:21,806 INFO L93 Difference]: Finished difference Result 6251 states and 9123 transitions. [2021-12-14 15:17:21,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 15:17:21,807 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-14 15:17:21,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:21,817 INFO L225 Difference]: With dead ends: 6251 [2021-12-14 15:17:21,818 INFO L226 Difference]: Without dead ends: 4195 [2021-12-14 15:17:21,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-12-14 15:17:21,820 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 1113 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:21,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1113 Valid, 269 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:17:21,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2021-12-14 15:17:21,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 2170. [2021-12-14 15:17:21,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 1.4527431996311664) internal successors, (3151), 2169 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states 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 15:17:21,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 3151 transitions. [2021-12-14 15:17:21,991 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 3151 transitions. Word has length 70 [2021-12-14 15:17:21,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:21,991 INFO L470 AbstractCegarLoop]: Abstraction has 2170 states and 3151 transitions. [2021-12-14 15:17:22,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:17:22,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 3151 transitions. [2021-12-14 15:17:22,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-14 15:17:22,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:22,008 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:17:22,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 15:17:22,008 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:22,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:22,009 INFO L85 PathProgramCache]: Analyzing trace with hash -795660249, now seen corresponding path program 1 times [2021-12-14 15:17:22,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:22,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080244336] [2021-12-14 15:17:22,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:22,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:22,121 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 15:17:22,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:22,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080244336] [2021-12-14 15:17:22,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080244336] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:22,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:22,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 15:17:22,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056128813] [2021-12-14 15:17:22,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:22,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 15:17:22,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:22,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 15:17:22,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-14 15:17:22,124 INFO L87 Difference]: Start difference. First operand 2170 states and 3151 transitions. Second operand has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 15:17:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:22,932 INFO L93 Difference]: Finished difference Result 6383 states and 9271 transitions. [2021-12-14 15:17:22,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 15:17:22,933 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-12-14 15:17:22,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:22,942 INFO L225 Difference]: With dead ends: 6383 [2021-12-14 15:17:22,942 INFO L226 Difference]: Without dead ends: 4328 [2021-12-14 15:17:22,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-12-14 15:17:22,945 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 810 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:22,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [810 Valid, 434 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 15:17:22,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2021-12-14 15:17:23,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 2170. [2021-12-14 15:17:23,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 1.449976947902259) internal successors, (3145), 2169 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states 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 15:17:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 3145 transitions. [2021-12-14 15:17:23,137 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 3145 transitions. Word has length 71 [2021-12-14 15:17:23,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:23,137 INFO L470 AbstractCegarLoop]: Abstraction has 2170 states and 3145 transitions. [2021-12-14 15:17:23,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 15:17:23,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 3145 transitions. [2021-12-14 15:17:23,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-14 15:17:23,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:23,138 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:17:23,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 15:17:23,138 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:23,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:23,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1977550344, now seen corresponding path program 1 times [2021-12-14 15:17:23,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:23,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451938416] [2021-12-14 15:17:23,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:23,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:23,458 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 15:17:23,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:23,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451938416] [2021-12-14 15:17:23,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451938416] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:23,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:23,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 15:17:23,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736178659] [2021-12-14 15:17:23,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:23,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 15:17:23,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:23,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 15:17:23,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-14 15:17:23,461 INFO L87 Difference]: Start difference. First operand 2170 states and 3145 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 15:17:25,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:25,839 INFO L93 Difference]: Finished difference Result 13037 states and 19052 transitions. [2021-12-14 15:17:25,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 15:17:25,839 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-14 15:17:25,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:25,858 INFO L225 Difference]: With dead ends: 13037 [2021-12-14 15:17:25,859 INFO L226 Difference]: Without dead ends: 12299 [2021-12-14 15:17:25,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2021-12-14 15:17:25,863 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 1443 mSDsluCounter, 1478 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1443 SdHoareTripleChecker+Valid, 1682 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:25,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1443 Valid, 1682 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 15:17:25,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12299 states. [2021-12-14 15:17:26,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12299 to 2168. [2021-12-14 15:17:26,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 1.4462390401476697) internal successors, (3134), 2167 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states 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 15:17:26,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 3134 transitions. [2021-12-14 15:17:26,180 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 3134 transitions. Word has length 72 [2021-12-14 15:17:26,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:26,180 INFO L470 AbstractCegarLoop]: Abstraction has 2168 states and 3134 transitions. [2021-12-14 15:17:26,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 15:17:26,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 3134 transitions. [2021-12-14 15:17:26,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-14 15:17:26,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:26,181 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:17:26,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 15:17:26,182 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:26,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:26,182 INFO L85 PathProgramCache]: Analyzing trace with hash 821766808, now seen corresponding path program 1 times [2021-12-14 15:17:26,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:26,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635866951] [2021-12-14 15:17:26,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:26,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:26,458 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 15:17:26,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:26,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635866951] [2021-12-14 15:17:26,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635866951] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:26,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:26,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-14 15:17:26,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593628699] [2021-12-14 15:17:26,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:26,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 15:17:26,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:26,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 15:17:26,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-14 15:17:26,460 INFO L87 Difference]: Start difference. First operand 2168 states and 3134 transitions. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 15:17:27,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:27,963 INFO L93 Difference]: Finished difference Result 5711 states and 8304 transitions. [2021-12-14 15:17:27,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 15:17:27,963 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-14 15:17:27,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:27,969 INFO L225 Difference]: With dead ends: 5711 [2021-12-14 15:17:27,969 INFO L226 Difference]: Without dead ends: 4938 [2021-12-14 15:17:27,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-12-14 15:17:27,971 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 1189 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:27,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1189 Valid, 1362 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 15:17:27,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4938 states. [2021-12-14 15:17:28,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4938 to 2135. [2021-12-14 15:17:28,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 1.4475164011246486) internal successors, (3089), 2134 states have internal predecessors, (3089), 0 states have call successors, (0), 0 states 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 15:17:28,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 3089 transitions. [2021-12-14 15:17:28,278 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 3089 transitions. Word has length 72 [2021-12-14 15:17:28,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:28,279 INFO L470 AbstractCegarLoop]: Abstraction has 2135 states and 3089 transitions. [2021-12-14 15:17:28,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 15:17:28,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 3089 transitions. [2021-12-14 15:17:28,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-14 15:17:28,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:28,280 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:17:28,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 15:17:28,280 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:28,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:28,281 INFO L85 PathProgramCache]: Analyzing trace with hash 727688951, now seen corresponding path program 1 times [2021-12-14 15:17:28,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:28,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120756956] [2021-12-14 15:17:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:28,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:28,541 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 15:17:28,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:28,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120756956] [2021-12-14 15:17:28,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120756956] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:28,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:28,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-14 15:17:28,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886764787] [2021-12-14 15:17:28,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:28,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 15:17:28,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:28,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 15:17:28,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-14 15:17:28,542 INFO L87 Difference]: Start difference. First operand 2135 states and 3089 transitions. Second operand has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 15:17:30,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:30,755 INFO L93 Difference]: Finished difference Result 8921 states and 13029 transitions. [2021-12-14 15:17:30,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 15:17:30,756 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-14 15:17:30,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:30,766 INFO L225 Difference]: With dead ends: 8921 [2021-12-14 15:17:30,766 INFO L226 Difference]: Without dead ends: 8165 [2021-12-14 15:17:30,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-12-14 15:17:30,769 INFO L933 BasicCegarLoop]: 342 mSDtfsCounter, 841 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:30,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 1364 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 15:17:30,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8165 states. [2021-12-14 15:17:31,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8165 to 2113. [2021-12-14 15:17:31,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 1.449337121212121) internal successors, (3061), 2112 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states 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 15:17:31,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 3061 transitions. [2021-12-14 15:17:31,207 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 3061 transitions. Word has length 72 [2021-12-14 15:17:31,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:31,208 INFO L470 AbstractCegarLoop]: Abstraction has 2113 states and 3061 transitions. [2021-12-14 15:17:31,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 15:17:31,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 3061 transitions. [2021-12-14 15:17:31,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-14 15:17:31,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:31,209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:17:31,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 15:17:31,209 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:31,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:31,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1142963134, now seen corresponding path program 1 times [2021-12-14 15:17:31,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:31,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326726711] [2021-12-14 15:17:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:31,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:31,738 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 15:17:31,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:31,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326726711] [2021-12-14 15:17:31,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326726711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:31,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:31,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-12-14 15:17:31,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425124030] [2021-12-14 15:17:31,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:31,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-14 15:17:31,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:31,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-14 15:17:31,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-12-14 15:17:31,740 INFO L87 Difference]: Start difference. First operand 2113 states and 3061 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 15:17:35,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:35,008 INFO L93 Difference]: Finished difference Result 8206 states and 11974 transitions. [2021-12-14 15:17:35,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-14 15:17:35,009 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-12-14 15:17:35,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:35,016 INFO L225 Difference]: With dead ends: 8206 [2021-12-14 15:17:35,016 INFO L226 Difference]: Without dead ends: 6188 [2021-12-14 15:17:35,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=370, Invalid=1792, Unknown=0, NotChecked=0, Total=2162 [2021-12-14 15:17:35,019 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 640 mSDsluCounter, 2728 mSDsCounter, 0 mSdLazyCounter, 1987 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 2901 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:35,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [640 Valid, 2901 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1987 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 15:17:35,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6188 states. [2021-12-14 15:17:35,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6188 to 2126. [2021-12-14 15:17:35,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 1.447529411764706) internal successors, (3076), 2125 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states 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 15:17:35,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 3076 transitions. [2021-12-14 15:17:35,417 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 3076 transitions. Word has length 73 [2021-12-14 15:17:35,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:35,417 INFO L470 AbstractCegarLoop]: Abstraction has 2126 states and 3076 transitions. [2021-12-14 15:17:35,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 15:17:35,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 3076 transitions. [2021-12-14 15:17:35,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-14 15:17:35,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:35,418 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:17:35,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 15:17:35,418 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:35,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:35,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1973733170, now seen corresponding path program 1 times [2021-12-14 15:17:35,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:35,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934781661] [2021-12-14 15:17:35,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:35,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:36,025 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 15:17:36,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:36,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934781661] [2021-12-14 15:17:36,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934781661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:36,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:36,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-14 15:17:36,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680958310] [2021-12-14 15:17:36,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:36,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 15:17:36,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:36,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 15:17:36,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-12-14 15:17:36,026 INFO L87 Difference]: Start difference. First operand 2126 states and 3076 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:17:39,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:39,272 INFO L93 Difference]: Finished difference Result 8387 states and 12245 transitions. [2021-12-14 15:17:39,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-14 15:17:39,272 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-14 15:17:39,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:39,280 INFO L225 Difference]: With dead ends: 8387 [2021-12-14 15:17:39,280 INFO L226 Difference]: Without dead ends: 7647 [2021-12-14 15:17:39,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2021-12-14 15:17:39,282 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 1326 mSDsluCounter, 2673 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1326 SdHoareTripleChecker+Valid, 2914 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:39,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1326 Valid, 2914 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 15:17:39,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7647 states. [2021-12-14 15:17:39,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7647 to 2122. [2021-12-14 15:17:39,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 2121 states have (on average 1.447901933050448) internal successors, (3071), 2121 states have internal predecessors, (3071), 0 states have call successors, (0), 0 states 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 15:17:39,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 3071 transitions. [2021-12-14 15:17:39,749 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 3071 transitions. Word has length 74 [2021-12-14 15:17:39,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:39,749 INFO L470 AbstractCegarLoop]: Abstraction has 2122 states and 3071 transitions. [2021-12-14 15:17:39,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:17:39,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 3071 transitions. [2021-12-14 15:17:39,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-14 15:17:39,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:39,750 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:17:39,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 15:17:39,750 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:39,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:39,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1376089835, now seen corresponding path program 1 times [2021-12-14 15:17:39,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:39,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101897667] [2021-12-14 15:17:39,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:39,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:39,796 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 15:17:39,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:39,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101897667] [2021-12-14 15:17:39,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101897667] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:39,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:39,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:17:39,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204284203] [2021-12-14 15:17:39,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:39,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:17:39,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:39,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:17:39,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:17:39,798 INFO L87 Difference]: Start difference. First operand 2122 states and 3071 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:17:40,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:40,476 INFO L93 Difference]: Finished difference Result 4924 states and 7180 transitions. [2021-12-14 15:17:40,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:17:40,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-14 15:17:40,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:40,482 INFO L225 Difference]: With dead ends: 4924 [2021-12-14 15:17:40,482 INFO L226 Difference]: Without dead ends: 2908 [2021-12-14 15:17:40,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:17:40,485 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 117 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:40,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 351 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:17:40,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2021-12-14 15:17:41,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2906. [2021-12-14 15:17:41,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2906 states, 2905 states have (on average 1.4450946643717728) internal successors, (4198), 2905 states have internal predecessors, (4198), 0 states have call successors, (0), 0 states 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 15:17:41,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2906 states to 2906 states and 4198 transitions. [2021-12-14 15:17:41,085 INFO L78 Accepts]: Start accepts. Automaton has 2906 states and 4198 transitions. Word has length 74 [2021-12-14 15:17:41,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:41,086 INFO L470 AbstractCegarLoop]: Abstraction has 2906 states and 4198 transitions. [2021-12-14 15:17:41,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:17:41,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2906 states and 4198 transitions. [2021-12-14 15:17:41,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-14 15:17:41,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:41,087 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:17:41,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 15:17:41,087 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:41,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:41,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2085145361, now seen corresponding path program 1 times [2021-12-14 15:17:41,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:41,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11289025] [2021-12-14 15:17:41,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:41,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:41,122 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 15:17:41,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:41,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11289025] [2021-12-14 15:17:41,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11289025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:41,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:41,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:17:41,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003946725] [2021-12-14 15:17:41,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:41,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:17:41,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:41,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:17:41,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:17:41,124 INFO L87 Difference]: Start difference. First operand 2906 states and 4198 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:17:42,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:42,112 INFO L93 Difference]: Finished difference Result 4480 states and 6470 transitions. [2021-12-14 15:17:42,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:17:42,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-14 15:17:42,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:42,117 INFO L225 Difference]: With dead ends: 4480 [2021-12-14 15:17:42,117 INFO L226 Difference]: Without dead ends: 4478 [2021-12-14 15:17:42,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:17:42,118 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 138 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:42,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 603 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:17:42,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4478 states. [2021-12-14 15:17:42,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4478 to 2926. [2021-12-14 15:17:42,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2926 states, 2925 states have (on average 1.4345299145299146) internal successors, (4196), 2925 states have internal predecessors, (4196), 0 states have call successors, (0), 0 states 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 15:17:42,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2926 states to 2926 states and 4196 transitions. [2021-12-14 15:17:42,751 INFO L78 Accepts]: Start accepts. Automaton has 2926 states and 4196 transitions. Word has length 74 [2021-12-14 15:17:42,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:42,751 INFO L470 AbstractCegarLoop]: Abstraction has 2926 states and 4196 transitions. [2021-12-14 15:17:42,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:17:42,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2926 states and 4196 transitions. [2021-12-14 15:17:42,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-14 15:17:42,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:42,752 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:17:42,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 15:17:42,752 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:42,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:42,753 INFO L85 PathProgramCache]: Analyzing trace with hash 793785870, now seen corresponding path program 1 times [2021-12-14 15:17:42,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:42,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604450688] [2021-12-14 15:17:42,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:42,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:43,025 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 15:17:43,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:43,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604450688] [2021-12-14 15:17:43,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604450688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:43,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:43,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-14 15:17:43,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113016413] [2021-12-14 15:17:43,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:43,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 15:17:43,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:43,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 15:17:43,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-14 15:17:43,027 INFO L87 Difference]: Start difference. First operand 2926 states and 4196 transitions. Second operand has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:17:46,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:46,509 INFO L93 Difference]: Finished difference Result 12513 states and 18053 transitions. [2021-12-14 15:17:46,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 15:17:46,510 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-14 15:17:46,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:46,519 INFO L225 Difference]: With dead ends: 12513 [2021-12-14 15:17:46,519 INFO L226 Difference]: Without dead ends: 11411 [2021-12-14 15:17:46,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-12-14 15:17:46,522 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 1027 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:46,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1027 Valid, 1308 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 15:17:46,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11411 states. [2021-12-14 15:17:47,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11411 to 2913. [2021-12-14 15:17:47,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 1.4350961538461537) internal successors, (4179), 2912 states have internal predecessors, (4179), 0 states have call successors, (0), 0 states 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 15:17:47,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 4179 transitions. [2021-12-14 15:17:47,329 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 4179 transitions. Word has length 74 [2021-12-14 15:17:47,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:47,330 INFO L470 AbstractCegarLoop]: Abstraction has 2913 states and 4179 transitions. [2021-12-14 15:17:47,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:17:47,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 4179 transitions. [2021-12-14 15:17:47,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-14 15:17:47,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:47,332 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:17:47,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-14 15:17:47,332 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:47,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:47,332 INFO L85 PathProgramCache]: Analyzing trace with hash 7064238, now seen corresponding path program 1 times [2021-12-14 15:17:47,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:47,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612251147] [2021-12-14 15:17:47,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:47,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:17:47,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:47,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612251147] [2021-12-14 15:17:47,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612251147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:47,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:47,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:17:47,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206391248] [2021-12-14 15:17:47,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:47,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:17:47,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:47,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:17:47,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:17:47,372 INFO L87 Difference]: Start difference. First operand 2913 states and 4179 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 15:17:48,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:48,462 INFO L93 Difference]: Finished difference Result 6175 states and 8898 transitions. [2021-12-14 15:17:48,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:17:48,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-14 15:17:48,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:48,466 INFO L225 Difference]: With dead ends: 6175 [2021-12-14 15:17:48,466 INFO L226 Difference]: Without dead ends: 4139 [2021-12-14 15:17:48,468 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 15:17:48,469 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 65 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:48,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 320 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:17:48,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2021-12-14 15:17:49,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 3953. [2021-12-14 15:17:49,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 1.4263663967611335) internal successors, (5637), 3952 states have internal predecessors, (5637), 0 states have call successors, (0), 0 states 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 15:17:49,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 5637 transitions. [2021-12-14 15:17:49,483 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 5637 transitions. Word has length 98 [2021-12-14 15:17:49,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:49,483 INFO L470 AbstractCegarLoop]: Abstraction has 3953 states and 5637 transitions. [2021-12-14 15:17:49,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 15:17:49,484 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 5637 transitions. [2021-12-14 15:17:49,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-14 15:17:49,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:49,485 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:17:49,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-14 15:17:49,485 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:49,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:49,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1464428980, now seen corresponding path program 1 times [2021-12-14 15:17:49,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:49,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483605780] [2021-12-14 15:17:49,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:49,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:17:49,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:49,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483605780] [2021-12-14 15:17:49,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483605780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:49,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:49,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:17:49,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292144566] [2021-12-14 15:17:49,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:49,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:17:49,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:49,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:17:49,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:17:49,528 INFO L87 Difference]: Start difference. First operand 3953 states and 5637 transitions. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 15:17:53,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:17:53,681 INFO L93 Difference]: Finished difference Result 19825 states and 28213 transitions. [2021-12-14 15:17:53,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 15:17:53,682 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-12-14 15:17:53,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:17:53,704 INFO L225 Difference]: With dead ends: 19825 [2021-12-14 15:17:53,705 INFO L226 Difference]: Without dead ends: 15983 [2021-12-14 15:17:53,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-14 15:17:53,712 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1094 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:17:53,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1094 Valid, 290 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:17:53,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15983 states. [2021-12-14 15:17:55,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15983 to 8633. [2021-12-14 15:17:55,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8633 states, 8632 states have (on average 1.4284059314179796) internal successors, (12330), 8632 states have internal predecessors, (12330), 0 states have call successors, (0), 0 states 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 15:17:55,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8633 states to 8633 states and 12330 transitions. [2021-12-14 15:17:55,843 INFO L78 Accepts]: Start accepts. Automaton has 8633 states and 12330 transitions. Word has length 100 [2021-12-14 15:17:55,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:17:55,843 INFO L470 AbstractCegarLoop]: Abstraction has 8633 states and 12330 transitions. [2021-12-14 15:17:55,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 15:17:55,843 INFO L276 IsEmpty]: Start isEmpty. Operand 8633 states and 12330 transitions. [2021-12-14 15:17:55,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-14 15:17:55,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:17:55,844 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:17:55,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-14 15:17:55,845 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:17:55,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:17:55,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1886997434, now seen corresponding path program 1 times [2021-12-14 15:17:55,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:17:55,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257055176] [2021-12-14 15:17:55,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:17:55,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:17:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:17:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:17:55,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:17:55,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257055176] [2021-12-14 15:17:55,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257055176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:17:55,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:17:55,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:17:55,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153702738] [2021-12-14 15:17:55,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:17:55,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:17:55,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:17:55,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:17:55,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:17:55,900 INFO L87 Difference]: Start difference. First operand 8633 states and 12330 transitions. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 15:18:03,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:18:03,376 INFO L93 Difference]: Finished difference Result 38905 states and 55684 transitions. [2021-12-14 15:18:03,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 15:18:03,376 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-12-14 15:18:03,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:18:03,419 INFO L225 Difference]: With dead ends: 38905 [2021-12-14 15:18:03,419 INFO L226 Difference]: Without dead ends: 30383 [2021-12-14 15:18:03,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-14 15:18:03,434 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 1269 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 15:18:03,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1269 Valid, 284 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 15:18:03,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30383 states. [2021-12-14 15:18:08,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30383 to 18833. [2021-12-14 15:18:08,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18833 states, 18832 states have (on average 1.4279949022939677) internal successors, (26892), 18832 states have internal predecessors, (26892), 0 states have call successors, (0), 0 states 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 15:18:08,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18833 states to 18833 states and 26892 transitions. [2021-12-14 15:18:08,128 INFO L78 Accepts]: Start accepts. Automaton has 18833 states and 26892 transitions. Word has length 100 [2021-12-14 15:18:08,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:18:08,128 INFO L470 AbstractCegarLoop]: Abstraction has 18833 states and 26892 transitions. [2021-12-14 15:18:08,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 15:18:08,129 INFO L276 IsEmpty]: Start isEmpty. Operand 18833 states and 26892 transitions. [2021-12-14 15:18:08,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-14 15:18:08,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:18:08,130 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:18:08,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-14 15:18:08,130 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:18:08,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:18:08,130 INFO L85 PathProgramCache]: Analyzing trace with hash -946391488, now seen corresponding path program 1 times [2021-12-14 15:18:08,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:18:08,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231195520] [2021-12-14 15:18:08,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:18:08,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:18:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:18:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:18:08,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:18:08,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231195520] [2021-12-14 15:18:08,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231195520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:18:08,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:18:08,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:18:08,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877394730] [2021-12-14 15:18:08,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:18:08,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:18:08,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:18:08,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:18:08,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:18:08,205 INFO L87 Difference]: Start difference. First operand 18833 states and 26892 transitions. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 15:18:16,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:18:16,489 INFO L93 Difference]: Finished difference Result 51291 states and 73123 transitions. [2021-12-14 15:18:16,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 15:18:16,489 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-12-14 15:18:16,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:18:16,535 INFO L225 Difference]: With dead ends: 51291 [2021-12-14 15:18:16,535 INFO L226 Difference]: Without dead ends: 32569 [2021-12-14 15:18:16,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-14 15:18:16,558 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 1182 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 15:18:16,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1182 Valid, 308 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 15:18:16,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32569 states. [2021-12-14 15:18:21,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32569 to 20435. [2021-12-14 15:18:21,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20435 states, 20434 states have (on average 1.424929039835568) internal successors, (29117), 20434 states have internal predecessors, (29117), 0 states have call successors, (0), 0 states 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 15:18:21,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20435 states to 20435 states and 29117 transitions. [2021-12-14 15:18:21,653 INFO L78 Accepts]: Start accepts. Automaton has 20435 states and 29117 transitions. Word has length 100 [2021-12-14 15:18:21,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:18:21,653 INFO L470 AbstractCegarLoop]: Abstraction has 20435 states and 29117 transitions. [2021-12-14 15:18:21,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 15:18:21,653 INFO L276 IsEmpty]: Start isEmpty. Operand 20435 states and 29117 transitions. [2021-12-14 15:18:21,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-14 15:18:21,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:18:21,657 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:18:21,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-14 15:18:21,657 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:18:21,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:18:21,658 INFO L85 PathProgramCache]: Analyzing trace with hash 950614827, now seen corresponding path program 1 times [2021-12-14 15:18:21,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:18:21,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649678193] [2021-12-14 15:18:21,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:18:21,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:18:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:18:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-14 15:18:21,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:18:21,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649678193] [2021-12-14 15:18:21,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649678193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:18:21,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:18:21,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:18:21,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278096155] [2021-12-14 15:18:21,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:18:21,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:18:21,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:18:21,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:18:21,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:18:21,689 INFO L87 Difference]: Start difference. First operand 20435 states and 29117 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)