./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem16_label20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem16_label20.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 10843b53b0c8d626e0b45edf6995c892da25187fbdbb4d013770994aea6c76bb --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 22:52:54,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 22:52:54,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 22:52:54,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 22:52:54,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 22:52:54,539 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 22:52:54,540 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 22:52:54,541 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 22:52:54,542 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 22:52:54,543 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 22:52:54,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 22:52:54,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 22:52:54,545 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 22:52:54,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 22:52:54,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 22:52:54,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 22:52:54,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 22:52:54,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 22:52:54,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 22:52:54,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 22:52:54,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 22:52:54,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 22:52:54,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 22:52:54,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 22:52:54,569 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 22:52:54,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 22:52:54,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 22:52:54,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 22:52:54,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 22:52:54,577 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 22:52:54,579 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 22:52:54,579 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 22:52:54,580 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 22:52:54,580 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 22:52:54,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 22:52:54,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 22:52:54,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 22:52:54,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 22:52:54,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 22:52:54,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 22:52:54,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 22:52:54,586 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 22:52:54,616 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 22:52:54,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 22:52:54,618 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 22:52:54,618 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 22:52:54,619 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 22:52:54,619 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 22:52:54,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 22:52:54,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 22:52:54,620 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 22:52:54,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 22:52:54,621 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 22:52:54,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 22:52:54,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 22:52:54,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 22:52:54,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 22:52:54,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 22:52:54,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 22:52:54,622 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 22:52:54,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 22:52:54,622 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 22:52:54,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 22:52:54,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 22:52:54,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 22:52:54,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 22:52:54,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 22:52:54,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 22:52:54,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 22:52:54,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 22:52:54,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 22:52:54,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 22:52:54,624 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 22:52:54,624 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 22:52:54,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 22:52:54,625 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10843b53b0c8d626e0b45edf6995c892da25187fbdbb4d013770994aea6c76bb [2021-12-27 22:52:54,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 22:52:54,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 22:52:54,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 22:52:54,934 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 22:52:54,936 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 22:52:54,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label20.c [2021-12-27 22:52:54,987 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/198982432/42a9a4c38ec84f6ba4da41daf3f5874b/FLAGff6b92888 [2021-12-27 22:52:55,550 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 22:52:55,550 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label20.c [2021-12-27 22:52:55,565 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/198982432/42a9a4c38ec84f6ba4da41daf3f5874b/FLAGff6b92888 [2021-12-27 22:52:56,013 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/198982432/42a9a4c38ec84f6ba4da41daf3f5874b [2021-12-27 22:52:56,015 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 22:52:56,016 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 22:52:56,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 22:52:56,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 22:52:56,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 22:52:56,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 10:52:56" (1/1) ... [2021-12-27 22:52:56,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8352fe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:52:56, skipping insertion in model container [2021-12-27 22:52:56,023 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 10:52:56" (1/1) ... [2021-12-27 22:52:56,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 22:52:56,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 22:52:56,253 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label20.c[2717,2730] [2021-12-27 22:52:56,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 22:52:56,556 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 22:52:56,577 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label20.c[2717,2730] [2021-12-27 22:52:56,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 22:52:56,723 INFO L208 MainTranslator]: Completed translation [2021-12-27 22:52:56,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:52:56 WrapperNode [2021-12-27 22:52:56,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 22:52:56,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 22:52:56,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 22:52:56,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 22:52:56,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:52:56" (1/1) ... [2021-12-27 22:52:56,756 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:52:56" (1/1) ... [2021-12-27 22:52:56,876 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1768 [2021-12-27 22:52:56,876 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 22:52:56,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 22:52:56,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 22:52:56,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 22:52:56,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:52:56" (1/1) ... [2021-12-27 22:52:56,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:52:56" (1/1) ... [2021-12-27 22:52:56,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:52:56" (1/1) ... [2021-12-27 22:52:56,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:52:56" (1/1) ... [2021-12-27 22:52:56,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:52:56" (1/1) ... [2021-12-27 22:52:56,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:52:56" (1/1) ... [2021-12-27 22:52:56,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:52:56" (1/1) ... [2021-12-27 22:52:57,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 22:52:57,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 22:52:57,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 22:52:57,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 22:52:57,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:52:56" (1/1) ... [2021-12-27 22:52:57,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 22:52:57,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:52:57,090 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) [2021-12-27 22:52:57,091 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 [2021-12-27 22:52:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 22:52:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 22:52:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 22:52:57,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 22:52:57,166 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 22:52:57,167 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 22:52:58,571 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 22:52:58,582 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 22:52:58,582 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-27 22:52:58,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 10:52:58 BoogieIcfgContainer [2021-12-27 22:52:58,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 22:52:58,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 22:52:58,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 22:52:58,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 22:52:58,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 10:52:56" (1/3) ... [2021-12-27 22:52:58,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa90aa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 10:52:58, skipping insertion in model container [2021-12-27 22:52:58,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:52:56" (2/3) ... [2021-12-27 22:52:58,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa90aa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 10:52:58, skipping insertion in model container [2021-12-27 22:52:58,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 10:52:58" (3/3) ... [2021-12-27 22:52:58,588 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label20.c [2021-12-27 22:52:58,591 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 22:52:58,591 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 22:52:58,634 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 22:52:58,640 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 [2021-12-27 22:52:58,640 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 22:52:58,665 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:58,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-27 22:52:58,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:52:58,670 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] [2021-12-27 22:52:58,671 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:52:58,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:52:58,675 INFO L85 PathProgramCache]: Analyzing trace with hash -593706766, now seen corresponding path program 1 times [2021-12-27 22:52:58,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:52:58,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21370503] [2021-12-27 22:52:58,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:58,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:52:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:58,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:52:58,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:52:58,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21370503] [2021-12-27 22:52:58,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21370503] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:52:58,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:52:58,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 22:52:58,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838674068] [2021-12-27 22:52:58,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:52:58,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:52:58,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:52:58,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:52:58,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:52:58,865 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:00,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:53:00,132 INFO L93 Difference]: Finished difference Result 1122 states and 2103 transitions. [2021-12-27 22:53:00,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:53:00,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-12-27 22:53:00,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:53:00,146 INFO L225 Difference]: With dead ends: 1122 [2021-12-27 22:53:00,146 INFO L226 Difference]: Without dead ends: 662 [2021-12-27 22:53:00,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:53:00,152 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 336 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-27 22:53:00,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 223 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-27 22:53:00,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-27 22:53:00,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2021-12-27 22:53:00,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.5824508320726172) internal successors, (1046), 661 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:00,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1046 transitions. [2021-12-27 22:53:00,215 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1046 transitions. Word has length 24 [2021-12-27 22:53:00,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:53:00,215 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1046 transitions. [2021-12-27 22:53:00,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:00,216 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1046 transitions. [2021-12-27 22:53:00,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-27 22:53:00,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:53:00,218 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:53:00,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 22:53:00,219 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:53:00,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:53:00,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1262911625, now seen corresponding path program 1 times [2021-12-27 22:53:00,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:53:00,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949400544] [2021-12-27 22:53:00,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:00,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:53:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:00,283 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:53:00,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:53:00,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949400544] [2021-12-27 22:53:00,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949400544] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:53:00,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:53:00,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 22:53:00,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552925570] [2021-12-27 22:53:00,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:53:00,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:53:00,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:53:00,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:53:00,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:53:00,286 INFO L87 Difference]: Start difference. First operand 662 states and 1046 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:01,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:53:01,334 INFO L93 Difference]: Finished difference Result 1651 states and 2539 transitions. [2021-12-27 22:53:01,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:53:01,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-12-27 22:53:01,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:53:01,338 INFO L225 Difference]: With dead ends: 1651 [2021-12-27 22:53:01,338 INFO L226 Difference]: Without dead ends: 991 [2021-12-27 22:53:01,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:53:01,340 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 338 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-27 22:53:01,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 77 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-27 22:53:01,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-12-27 22:53:01,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 991. [2021-12-27 22:53:01,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 1.3767676767676769) internal successors, (1363), 990 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:01,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1363 transitions. [2021-12-27 22:53:01,370 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1363 transitions. Word has length 95 [2021-12-27 22:53:01,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:53:01,370 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 1363 transitions. [2021-12-27 22:53:01,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:01,370 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1363 transitions. [2021-12-27 22:53:01,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-27 22:53:01,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:53:01,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:53:01,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-27 22:53:01,373 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:53:01,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:53:01,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1365031106, now seen corresponding path program 1 times [2021-12-27 22:53:01,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:53:01,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118810065] [2021-12-27 22:53:01,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:01,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:53:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:53:01,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:53:01,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118810065] [2021-12-27 22:53:01,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118810065] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:53:01,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:53:01,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 22:53:01,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105345115] [2021-12-27 22:53:01,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:53:01,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:53:01,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:53:01,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:53:01,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:53:01,431 INFO L87 Difference]: Start difference. First operand 991 states and 1363 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:02,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:53:02,437 INFO L93 Difference]: Finished difference Result 2967 states and 4084 transitions. [2021-12-27 22:53:02,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:53:02,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-27 22:53:02,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:53:02,443 INFO L225 Difference]: With dead ends: 2967 [2021-12-27 22:53:02,443 INFO L226 Difference]: Without dead ends: 1978 [2021-12-27 22:53:02,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:53:02,445 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 289 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-27 22:53:02,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 209 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-27 22:53:02,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2021-12-27 22:53:02,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1978. [2021-12-27 22:53:02,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.2468386444107233) internal successors, (2465), 1977 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2465 transitions. [2021-12-27 22:53:02,473 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2465 transitions. Word has length 96 [2021-12-27 22:53:02,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:53:02,473 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 2465 transitions. [2021-12-27 22:53:02,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:02,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2465 transitions. [2021-12-27 22:53:02,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-27 22:53:02,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:53:02,475 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:53:02,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-27 22:53:02,476 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:53:02,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:53:02,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1623655327, now seen corresponding path program 1 times [2021-12-27 22:53:02,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:53:02,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165682299] [2021-12-27 22:53:02,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:02,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:53:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:53:02,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:53:02,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165682299] [2021-12-27 22:53:02,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165682299] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:53:02,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:53:02,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:53:02,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408864656] [2021-12-27 22:53:02,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:53:02,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:53:02,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:53:02,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:53:02,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:53:02,526 INFO L87 Difference]: Start difference. First operand 1978 states and 2465 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:03,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:53:03,468 INFO L93 Difference]: Finished difference Result 4612 states and 5852 transitions. [2021-12-27 22:53:03,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:53:03,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2021-12-27 22:53:03,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:53:03,479 INFO L225 Difference]: With dead ends: 4612 [2021-12-27 22:53:03,479 INFO L226 Difference]: Without dead ends: 2636 [2021-12-27 22:53:03,481 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 [2021-12-27 22:53:03,488 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 360 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-27 22:53:03,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 539 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-27 22:53:03,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-12-27 22:53:03,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2636. [2021-12-27 22:53:03,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2636 states, 2635 states have (on average 1.21707779886148) internal successors, (3207), 2635 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:03,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 3207 transitions. [2021-12-27 22:53:03,527 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 3207 transitions. Word has length 111 [2021-12-27 22:53:03,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:53:03,528 INFO L470 AbstractCegarLoop]: Abstraction has 2636 states and 3207 transitions. [2021-12-27 22:53:03,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:03,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 3207 transitions. [2021-12-27 22:53:03,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-12-27 22:53:03,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:53:03,536 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:53:03,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-27 22:53:03,537 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:53:03,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:53:03,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1197571519, now seen corresponding path program 1 times [2021-12-27 22:53:03,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:53:03,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529983472] [2021-12-27 22:53:03,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:03,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:53:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:03,690 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 208 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-27 22:53:03,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:53:03,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529983472] [2021-12-27 22:53:03,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529983472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:53:03,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:53:03,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 22:53:03,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044306823] [2021-12-27 22:53:03,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:53:03,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:53:03,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:53:03,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:53:03,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:53:03,695 INFO L87 Difference]: Start difference. First operand 2636 states and 3207 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:04,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:53:04,735 INFO L93 Difference]: Finished difference Result 6586 states and 8078 transitions. [2021-12-27 22:53:04,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:53:04,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 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 296 [2021-12-27 22:53:04,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:53:04,744 INFO L225 Difference]: With dead ends: 6586 [2021-12-27 22:53:04,745 INFO L226 Difference]: Without dead ends: 3294 [2021-12-27 22:53:04,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:53:04,752 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 358 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-27 22:53:04,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 156 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-27 22:53:04,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3294 states. [2021-12-27 22:53:04,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3294 to 3294. [2021-12-27 22:53:04,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3294 states, 3293 states have (on average 1.0652900091102337) internal successors, (3508), 3293 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:04,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3294 states to 3294 states and 3508 transitions. [2021-12-27 22:53:04,795 INFO L78 Accepts]: Start accepts. Automaton has 3294 states and 3508 transitions. Word has length 296 [2021-12-27 22:53:04,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:53:04,796 INFO L470 AbstractCegarLoop]: Abstraction has 3294 states and 3508 transitions. [2021-12-27 22:53:04,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:04,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3294 states and 3508 transitions. [2021-12-27 22:53:04,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2021-12-27 22:53:04,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:53:04,804 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-27 22:53:04,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-27 22:53:04,805 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:53:04,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:53:04,806 INFO L85 PathProgramCache]: Analyzing trace with hash -452962044, now seen corresponding path program 1 times [2021-12-27 22:53:04,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:53:04,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841026772] [2021-12-27 22:53:04,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:04,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:53:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 306 proven. 0 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2021-12-27 22:53:04,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:53:04,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841026772] [2021-12-27 22:53:04,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841026772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:53:04,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:53:04,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 22:53:04,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580073708] [2021-12-27 22:53:04,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:53:04,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:53:04,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:53:04,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:53:04,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:53:04,934 INFO L87 Difference]: Start difference. First operand 3294 states and 3508 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:05,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:53:05,697 INFO L93 Difference]: Finished difference Result 9549 states and 10185 transitions. [2021-12-27 22:53:05,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:53:05,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 462 [2021-12-27 22:53:05,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:53:05,714 INFO L225 Difference]: With dead ends: 9549 [2021-12-27 22:53:05,714 INFO L226 Difference]: Without dead ends: 6257 [2021-12-27 22:53:05,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:53:05,719 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 240 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-27 22:53:05,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 71 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-27 22:53:05,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6257 states. [2021-12-27 22:53:05,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6257 to 6255. [2021-12-27 22:53:05,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6255 states, 6254 states have (on average 1.0606012152222577) internal successors, (6633), 6254 states have internal predecessors, (6633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:05,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6255 states to 6255 states and 6633 transitions. [2021-12-27 22:53:05,800 INFO L78 Accepts]: Start accepts. Automaton has 6255 states and 6633 transitions. Word has length 462 [2021-12-27 22:53:05,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:53:05,801 INFO L470 AbstractCegarLoop]: Abstraction has 6255 states and 6633 transitions. [2021-12-27 22:53:05,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:05,801 INFO L276 IsEmpty]: Start isEmpty. Operand 6255 states and 6633 transitions. [2021-12-27 22:53:05,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2021-12-27 22:53:05,807 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:53:05,807 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:53:05,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-27 22:53:05,807 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:53:05,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:53:05,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1266456220, now seen corresponding path program 1 times [2021-12-27 22:53:05,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:53:05,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435483230] [2021-12-27 22:53:05,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:05,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:53:05,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 236 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-12-27 22:53:06,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:53:06,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435483230] [2021-12-27 22:53:06,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435483230] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:53:06,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:53:06,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:53:06,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162602188] [2021-12-27 22:53:06,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:53:06,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 22:53:06,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:53:06,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 22:53:06,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 22:53:06,027 INFO L87 Difference]: Start difference. First operand 6255 states and 6633 transitions. Second operand has 4 states, 4 states have (on average 90.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:06,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:53:06,793 INFO L93 Difference]: Finished difference Result 12232 states and 12985 transitions. [2021-12-27 22:53:06,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-27 22:53:06,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 90.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 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 486 [2021-12-27 22:53:06,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:53:06,808 INFO L225 Difference]: With dead ends: 12232 [2021-12-27 22:53:06,809 INFO L226 Difference]: Without dead ends: 6308 [2021-12-27 22:53:06,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-27 22:53:06,815 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 175 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-27 22:53:06,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 175 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-27 22:53:06,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6308 states. [2021-12-27 22:53:06,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6308 to 6255. [2021-12-27 22:53:06,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6255 states, 6254 states have (on average 1.0604413175567637) internal successors, (6632), 6254 states have internal predecessors, (6632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:06,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6255 states to 6255 states and 6632 transitions. [2021-12-27 22:53:06,932 INFO L78 Accepts]: Start accepts. Automaton has 6255 states and 6632 transitions. Word has length 486 [2021-12-27 22:53:06,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:53:06,936 INFO L470 AbstractCegarLoop]: Abstraction has 6255 states and 6632 transitions. [2021-12-27 22:53:06,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:06,936 INFO L276 IsEmpty]: Start isEmpty. Operand 6255 states and 6632 transitions. [2021-12-27 22:53:06,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2021-12-27 22:53:06,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:53:06,946 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:53:06,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-27 22:53:06,946 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:53:06,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:53:06,947 INFO L85 PathProgramCache]: Analyzing trace with hash 648084013, now seen corresponding path program 1 times [2021-12-27 22:53:06,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:53:06,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118726786] [2021-12-27 22:53:06,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:06,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:53:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 603 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-12-27 22:53:07,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:53:07,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118726786] [2021-12-27 22:53:07,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118726786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:53:07,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:53:07,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:53:07,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138789335] [2021-12-27 22:53:07,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:53:07,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:53:07,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:53:07,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:53:07,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:53:07,129 INFO L87 Difference]: Start difference. First operand 6255 states and 6632 transitions. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:53:07,940 INFO L93 Difference]: Finished difference Result 15140 states and 16162 transitions. [2021-12-27 22:53:07,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:53:07,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 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 601 [2021-12-27 22:53:07,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:53:07,960 INFO L225 Difference]: With dead ends: 15140 [2021-12-27 22:53:07,961 INFO L226 Difference]: Without dead ends: 9216 [2021-12-27 22:53:07,966 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 [2021-12-27 22:53:07,967 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 219 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-27 22:53:07,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 426 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-27 22:53:07,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2021-12-27 22:53:08,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 8887. [2021-12-27 22:53:08,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8887 states, 8886 states have (on average 1.0481656538374973) internal successors, (9314), 8886 states have internal predecessors, (9314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:08,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8887 states to 8887 states and 9314 transitions. [2021-12-27 22:53:08,063 INFO L78 Accepts]: Start accepts. Automaton has 8887 states and 9314 transitions. Word has length 601 [2021-12-27 22:53:08,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:53:08,064 INFO L470 AbstractCegarLoop]: Abstraction has 8887 states and 9314 transitions. [2021-12-27 22:53:08,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:08,064 INFO L276 IsEmpty]: Start isEmpty. Operand 8887 states and 9314 transitions. [2021-12-27 22:53:08,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2021-12-27 22:53:08,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:53:08,071 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:53:08,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-27 22:53:08,071 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:53:08,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:53:08,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1946616943, now seen corresponding path program 1 times [2021-12-27 22:53:08,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:53:08,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757766959] [2021-12-27 22:53:08,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:08,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:53:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 691 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-12-27 22:53:08,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:53:08,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757766959] [2021-12-27 22:53:08,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757766959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:53:08,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:53:08,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:53:08,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729563000] [2021-12-27 22:53:08,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:53:08,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:53:08,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:53:08,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:53:08,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:53:08,250 INFO L87 Difference]: Start difference. First operand 8887 states and 9314 transitions. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:09,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:53:09,006 INFO L93 Difference]: Finished difference Result 20404 states and 21512 transitions. [2021-12-27 22:53:09,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:53:09,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 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 664 [2021-12-27 22:53:09,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:53:09,023 INFO L225 Difference]: With dead ends: 20404 [2021-12-27 22:53:09,023 INFO L226 Difference]: Without dead ends: 11848 [2021-12-27 22:53:09,031 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 [2021-12-27 22:53:09,032 INFO L933 BasicCegarLoop]: 408 mSDtfsCounter, 175 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-27 22:53:09,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 414 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-27 22:53:09,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11848 states. [2021-12-27 22:53:09,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11848 to 10861. [2021-12-27 22:53:09,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10861 states, 10860 states have (on average 1.0453959484346225) internal successors, (11353), 10860 states have internal predecessors, (11353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:09,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10861 states to 10861 states and 11353 transitions. [2021-12-27 22:53:09,237 INFO L78 Accepts]: Start accepts. Automaton has 10861 states and 11353 transitions. Word has length 664 [2021-12-27 22:53:09,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:53:09,238 INFO L470 AbstractCegarLoop]: Abstraction has 10861 states and 11353 transitions. [2021-12-27 22:53:09,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:09,238 INFO L276 IsEmpty]: Start isEmpty. Operand 10861 states and 11353 transitions. [2021-12-27 22:53:09,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 963 [2021-12-27 22:53:09,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:53:09,251 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:53:09,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-27 22:53:09,251 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:53:09,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:53:09,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1723750616, now seen corresponding path program 1 times [2021-12-27 22:53:09,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:53:09,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25588140] [2021-12-27 22:53:09,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:09,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:53:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 1294 proven. 0 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2021-12-27 22:53:09,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:53:09,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25588140] [2021-12-27 22:53:09,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25588140] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:53:09,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:53:09,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:53:09,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823245159] [2021-12-27 22:53:09,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:53:09,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:53:09,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:53:09,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:53:09,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:53:09,516 INFO L87 Difference]: Start difference. First operand 10861 states and 11353 transitions. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:10,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:53:10,388 INFO L93 Difference]: Finished difference Result 24352 states and 25603 transitions. [2021-12-27 22:53:10,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:53:10,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 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 962 [2021-12-27 22:53:10,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:53:10,408 INFO L225 Difference]: With dead ends: 24352 [2021-12-27 22:53:10,408 INFO L226 Difference]: Without dead ends: 13822 [2021-12-27 22:53:10,417 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 [2021-12-27 22:53:10,417 INFO L933 BasicCegarLoop]: 428 mSDtfsCounter, 192 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-27 22:53:10,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 434 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-27 22:53:10,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13822 states. [2021-12-27 22:53:10,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13822 to 13164. [2021-12-27 22:53:10,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13164 states, 13163 states have (on average 1.0420876699840462) internal successors, (13717), 13163 states have internal predecessors, (13717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:10,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13164 states to 13164 states and 13717 transitions. [2021-12-27 22:53:10,538 INFO L78 Accepts]: Start accepts. Automaton has 13164 states and 13717 transitions. Word has length 962 [2021-12-27 22:53:10,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:53:10,539 INFO L470 AbstractCegarLoop]: Abstraction has 13164 states and 13717 transitions. [2021-12-27 22:53:10,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:10,539 INFO L276 IsEmpty]: Start isEmpty. Operand 13164 states and 13717 transitions. [2021-12-27 22:53:10,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 988 [2021-12-27 22:53:10,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:53:10,593 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:53:10,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-27 22:53:10,594 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:53:10,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:53:10,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1033665816, now seen corresponding path program 1 times [2021-12-27 22:53:10,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:53:10,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294571132] [2021-12-27 22:53:10,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:10,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:53:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1942 backedges. 736 proven. 734 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2021-12-27 22:53:10,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:53:10,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294571132] [2021-12-27 22:53:10,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294571132] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 22:53:10,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703315894] [2021-12-27 22:53:10,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:10,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:53:10,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:53:10,950 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 22:53:10,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 22:53:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:11,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 1188 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-27 22:53:11,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 22:53:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1942 backedges. 999 proven. 0 refuted. 0 times theorem prover too weak. 943 trivial. 0 not checked. [2021-12-27 22:53:12,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 22:53:12,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703315894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:53:12,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 22:53:12,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-27 22:53:12,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078916559] [2021-12-27 22:53:12,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:53:12,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:53:12,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:53:12,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:53:12,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-27 22:53:12,496 INFO L87 Difference]: Start difference. First operand 13164 states and 13717 transitions. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:13,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:53:13,129 INFO L93 Difference]: Finished difference Result 25997 states and 27101 transitions. [2021-12-27 22:53:13,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:53:13,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 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 987 [2021-12-27 22:53:13,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:53:13,148 INFO L225 Difference]: With dead ends: 25997 [2021-12-27 22:53:13,148 INFO L226 Difference]: Without dead ends: 13164 [2021-12-27 22:53:13,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 991 GetRequests, 987 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-27 22:53:13,159 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 225 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-27 22:53:13,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 377 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-27 22:53:13,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13164 states. [2021-12-27 22:53:13,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13164 to 13164. [2021-12-27 22:53:13,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13164 states, 13163 states have (on average 1.0376813796247055) internal successors, (13659), 13163 states have internal predecessors, (13659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:13,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13164 states to 13164 states and 13659 transitions. [2021-12-27 22:53:13,280 INFO L78 Accepts]: Start accepts. Automaton has 13164 states and 13659 transitions. Word has length 987 [2021-12-27 22:53:13,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:53:13,281 INFO L470 AbstractCegarLoop]: Abstraction has 13164 states and 13659 transitions. [2021-12-27 22:53:13,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:13,281 INFO L276 IsEmpty]: Start isEmpty. Operand 13164 states and 13659 transitions. [2021-12-27 22:53:13,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1275 [2021-12-27 22:53:13,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:53:13,306 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:53:13,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-27 22:53:13,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-27 22:53:13,522 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:53:13,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:53:13,522 INFO L85 PathProgramCache]: Analyzing trace with hash -762990140, now seen corresponding path program 1 times [2021-12-27 22:53:13,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:53:13,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727048396] [2021-12-27 22:53:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:13,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:53:13,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:13,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 1607 proven. 0 refuted. 0 times theorem prover too weak. 1319 trivial. 0 not checked. [2021-12-27 22:53:13,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:53:13,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727048396] [2021-12-27 22:53:13,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727048396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:53:13,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:53:13,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:53:13,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213896094] [2021-12-27 22:53:13,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:53:13,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:53:13,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:53:13,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:53:13,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:53:13,890 INFO L87 Difference]: Start difference. First operand 13164 states and 13659 transitions. Second operand has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:14,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:53:14,590 INFO L93 Difference]: Finished difference Result 26655 states and 27680 transitions. [2021-12-27 22:53:14,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:53:14,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 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 1274 [2021-12-27 22:53:14,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:53:14,607 INFO L225 Difference]: With dead ends: 26655 [2021-12-27 22:53:14,608 INFO L226 Difference]: Without dead ends: 13822 [2021-12-27 22:53:14,616 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 [2021-12-27 22:53:14,617 INFO L933 BasicCegarLoop]: 432 mSDtfsCounter, 224 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-27 22:53:14,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 438 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-27 22:53:14,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13822 states. [2021-12-27 22:53:14,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13822 to 13493. [2021-12-27 22:53:14,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13493 states, 13492 states have (on average 1.0354284020160094) internal successors, (13970), 13492 states have internal predecessors, (13970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:14,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13493 states to 13493 states and 13970 transitions. [2021-12-27 22:53:14,729 INFO L78 Accepts]: Start accepts. Automaton has 13493 states and 13970 transitions. Word has length 1274 [2021-12-27 22:53:14,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:53:14,730 INFO L470 AbstractCegarLoop]: Abstraction has 13493 states and 13970 transitions. [2021-12-27 22:53:14,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:14,730 INFO L276 IsEmpty]: Start isEmpty. Operand 13493 states and 13970 transitions. [2021-12-27 22:53:14,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1329 [2021-12-27 22:53:14,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:53:14,752 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:53:14,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-27 22:53:14,752 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:53:14,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:53:14,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1429032343, now seen corresponding path program 1 times [2021-12-27 22:53:14,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:53:14,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385103229] [2021-12-27 22:53:14,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:14,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:53:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2982 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 2829 trivial. 0 not checked. [2021-12-27 22:53:15,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:53:15,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385103229] [2021-12-27 22:53:15,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385103229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:53:15,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:53:15,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:53:15,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641108394] [2021-12-27 22:53:15,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:53:15,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:53:15,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:53:15,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:53:15,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:53:15,122 INFO L87 Difference]: Start difference. First operand 13493 states and 13970 transitions. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:15,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:53:15,918 INFO L93 Difference]: Finished difference Result 29287 states and 30347 transitions. [2021-12-27 22:53:15,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:53:15,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 1328 [2021-12-27 22:53:15,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:53:15,942 INFO L225 Difference]: With dead ends: 29287 [2021-12-27 22:53:15,942 INFO L226 Difference]: Without dead ends: 14480 [2021-12-27 22:53:15,950 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 [2021-12-27 22:53:15,950 INFO L933 BasicCegarLoop]: 433 mSDtfsCounter, 307 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-27 22:53:15,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 439 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-27 22:53:15,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14480 states. [2021-12-27 22:53:16,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14480 to 14480. [2021-12-27 22:53:16,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14480 states, 14479 states have (on average 1.0328751985634368) internal successors, (14955), 14479 states have internal predecessors, (14955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:16,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14480 states to 14480 states and 14955 transitions. [2021-12-27 22:53:16,101 INFO L78 Accepts]: Start accepts. Automaton has 14480 states and 14955 transitions. Word has length 1328 [2021-12-27 22:53:16,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:53:16,102 INFO L470 AbstractCegarLoop]: Abstraction has 14480 states and 14955 transitions. [2021-12-27 22:53:16,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:16,102 INFO L276 IsEmpty]: Start isEmpty. Operand 14480 states and 14955 transitions. [2021-12-27 22:53:16,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1368 [2021-12-27 22:53:16,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:53:16,129 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:53:16,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-27 22:53:16,129 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:53:16,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:53:16,130 INFO L85 PathProgramCache]: Analyzing trace with hash -2030082296, now seen corresponding path program 1 times [2021-12-27 22:53:16,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:53:16,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817270273] [2021-12-27 22:53:16,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:16,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:53:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2982 backedges. 2187 proven. 29 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2021-12-27 22:53:16,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:53:16,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817270273] [2021-12-27 22:53:16,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817270273] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 22:53:16,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330167953] [2021-12-27 22:53:16,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:16,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:53:16,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:53:16,671 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 22:53:16,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-27 22:53:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:16,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-27 22:53:16,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 22:53:20,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2982 backedges. 1580 proven. 201 refuted. 0 times theorem prover too weak. 1201 trivial. 0 not checked. [2021-12-27 22:53:20,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 22:53:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2982 backedges. 1580 proven. 201 refuted. 0 times theorem prover too weak. 1201 trivial. 0 not checked. [2021-12-27 22:53:26,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330167953] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 22:53:26,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 22:53:26,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3, 3] total 12 [2021-12-27 22:53:26,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950495428] [2021-12-27 22:53:26,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 22:53:26,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-27 22:53:26,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:53:26,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-27 22:53:26,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-12-27 22:53:26,954 INFO L87 Difference]: Start difference. First operand 14480 states and 14955 transitions. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:33,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:53:33,597 INFO L93 Difference]: Finished difference Result 42215 states and 43573 transitions. [2021-12-27 22:53:33,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-27 22:53:33,598 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 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 1367 [2021-12-27 22:53:33,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:53:33,623 INFO L225 Difference]: With dead ends: 42215 [2021-12-27 22:53:33,624 INFO L226 Difference]: Without dead ends: 28066 [2021-12-27 22:53:33,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2773 GetRequests, 2744 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=693, Unknown=0, NotChecked=0, Total=930 [2021-12-27 22:53:33,631 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 1290 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 15995 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1290 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 16338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 15995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-12-27 22:53:33,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1290 Valid, 541 Invalid, 16338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 15995 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-12-27 22:53:33,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28066 states. [2021-12-27 22:53:33,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28066 to 14809. [2021-12-27 22:53:33,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14809 states, 14808 states have (on average 1.0287682333873582) internal successors, (15234), 14808 states have internal predecessors, (15234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14809 states to 14809 states and 15234 transitions. [2021-12-27 22:53:33,814 INFO L78 Accepts]: Start accepts. Automaton has 14809 states and 15234 transitions. Word has length 1367 [2021-12-27 22:53:33,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:53:33,814 INFO L470 AbstractCegarLoop]: Abstraction has 14809 states and 15234 transitions. [2021-12-27 22:53:33,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:33,815 INFO L276 IsEmpty]: Start isEmpty. Operand 14809 states and 15234 transitions. [2021-12-27 22:53:33,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1422 [2021-12-27 22:53:33,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:53:33,839 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:53:33,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-27 22:53:34,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-27 22:53:34,069 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:53:34,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:53:34,070 INFO L85 PathProgramCache]: Analyzing trace with hash -479131591, now seen corresponding path program 1 times [2021-12-27 22:53:34,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:53:34,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838755372] [2021-12-27 22:53:34,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:34,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:53:34,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 1664 proven. 156 refuted. 0 times theorem prover too weak. 1616 trivial. 0 not checked. [2021-12-27 22:53:34,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:53:34,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838755372] [2021-12-27 22:53:34,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838755372] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 22:53:34,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623994822] [2021-12-27 22:53:34,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:34,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:53:34,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:53:34,474 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 22:53:34,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-27 22:53:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:34,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-27 22:53:34,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 22:53:36,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 1827 proven. 0 refuted. 0 times theorem prover too weak. 1609 trivial. 0 not checked. [2021-12-27 22:53:36,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 22:53:36,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623994822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:53:36,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 22:53:36,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-27 22:53:36,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771758173] [2021-12-27 22:53:36,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:53:36,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:53:36,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:53:36,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:53:36,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-27 22:53:36,247 INFO L87 Difference]: Start difference. First operand 14809 states and 15234 transitions. Second operand has 3 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:36,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:53:36,893 INFO L93 Difference]: Finished difference Result 30274 states and 31128 transitions. [2021-12-27 22:53:36,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:53:36,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 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 1421 [2021-12-27 22:53:36,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:53:36,908 INFO L225 Difference]: With dead ends: 30274 [2021-12-27 22:53:36,909 INFO L226 Difference]: Without dead ends: 14480 [2021-12-27 22:53:36,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1425 GetRequests, 1420 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-27 22:53:36,920 INFO L933 BasicCegarLoop]: 386 mSDtfsCounter, 52 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-27 22:53:36,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 391 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-27 22:53:36,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14480 states. [2021-12-27 22:53:37,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14480 to 13164. [2021-12-27 22:53:37,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13164 states, 13163 states have (on average 1.0254501253513637) internal successors, (13498), 13163 states have internal predecessors, (13498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:37,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13164 states to 13164 states and 13498 transitions. [2021-12-27 22:53:37,071 INFO L78 Accepts]: Start accepts. Automaton has 13164 states and 13498 transitions. Word has length 1421 [2021-12-27 22:53:37,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:53:37,072 INFO L470 AbstractCegarLoop]: Abstraction has 13164 states and 13498 transitions. [2021-12-27 22:53:37,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:37,073 INFO L276 IsEmpty]: Start isEmpty. Operand 13164 states and 13498 transitions. [2021-12-27 22:53:37,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1440 [2021-12-27 22:53:37,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:53:37,096 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-27 22:53:37,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-27 22:53:37,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:53:37,315 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:53:37,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:53:37,315 INFO L85 PathProgramCache]: Analyzing trace with hash -2069712665, now seen corresponding path program 1 times [2021-12-27 22:53:37,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:53:37,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634422121] [2021-12-27 22:53:37,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:37,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:53:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3907 backedges. 1797 proven. 156 refuted. 0 times theorem prover too weak. 1954 trivial. 0 not checked. [2021-12-27 22:53:37,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:53:37,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634422121] [2021-12-27 22:53:37,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634422121] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 22:53:37,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842455555] [2021-12-27 22:53:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:37,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:53:37,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:53:37,655 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 22:53:37,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-27 22:53:37,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:37,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 1688 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-27 22:53:37,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 22:53:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3907 backedges. 961 proven. 0 refuted. 0 times theorem prover too weak. 2946 trivial. 0 not checked. [2021-12-27 22:53:39,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 22:53:39,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842455555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:53:39,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 22:53:39,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-27 22:53:39,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586098526] [2021-12-27 22:53:39,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:53:39,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:53:39,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:53:39,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:53:39,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-27 22:53:39,347 INFO L87 Difference]: Start difference. First operand 13164 states and 13498 transitions. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:39,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:53:39,946 INFO L93 Difference]: Finished difference Result 25997 states and 26663 transitions. [2021-12-27 22:53:39,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:53:39,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 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 1439 [2021-12-27 22:53:39,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:53:39,958 INFO L225 Difference]: With dead ends: 25997 [2021-12-27 22:53:39,958 INFO L226 Difference]: Without dead ends: 13164 [2021-12-27 22:53:39,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1443 GetRequests, 1438 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-27 22:53:39,966 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 227 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-27 22:53:39,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 26 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-27 22:53:39,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13164 states. [2021-12-27 22:53:40,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13164 to 13164. [2021-12-27 22:53:40,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13164 states, 13163 states have (on average 1.0240066854060625) internal successors, (13479), 13163 states have internal predecessors, (13479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13164 states to 13164 states and 13479 transitions. [2021-12-27 22:53:40,077 INFO L78 Accepts]: Start accepts. Automaton has 13164 states and 13479 transitions. Word has length 1439 [2021-12-27 22:53:40,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:53:40,078 INFO L470 AbstractCegarLoop]: Abstraction has 13164 states and 13479 transitions. [2021-12-27 22:53:40,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:40,078 INFO L276 IsEmpty]: Start isEmpty. Operand 13164 states and 13479 transitions. [2021-12-27 22:53:40,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1601 [2021-12-27 22:53:40,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:53:40,100 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:53:40,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-27 22:53:40,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-27 22:53:40,302 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:53:40,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:53:40,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1166486141, now seen corresponding path program 1 times [2021-12-27 22:53:40,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:53:40,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852821555] [2021-12-27 22:53:40,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:40,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:53:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5042 backedges. 2115 proven. 156 refuted. 0 times theorem prover too weak. 2771 trivial. 0 not checked. [2021-12-27 22:53:40,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:53:40,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852821555] [2021-12-27 22:53:40,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852821555] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 22:53:40,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60178789] [2021-12-27 22:53:40,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:40,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:53:40,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:53:40,724 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 22:53:40,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-27 22:53:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:41,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 1873 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 22:53:41,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 22:53:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5042 backedges. 2271 proven. 0 refuted. 0 times theorem prover too weak. 2771 trivial. 0 not checked. [2021-12-27 22:53:43,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 22:53:43,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60178789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:53:43,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 22:53:43,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-27 22:53:43,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225134550] [2021-12-27 22:53:43,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:53:43,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:53:43,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:53:43,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:53:43,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-27 22:53:43,006 INFO L87 Difference]: Start difference. First operand 13164 states and 13479 transitions. Second operand has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:43,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:53:43,689 INFO L93 Difference]: Finished difference Result 28300 states and 28976 transitions. [2021-12-27 22:53:43,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:53:43,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 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 1600 [2021-12-27 22:53:43,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:53:43,702 INFO L225 Difference]: With dead ends: 28300 [2021-12-27 22:53:43,703 INFO L226 Difference]: Without dead ends: 15467 [2021-12-27 22:53:43,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1604 GetRequests, 1599 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-27 22:53:43,710 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 175 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-27 22:53:43,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 86 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-27 22:53:43,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15467 states. [2021-12-27 22:53:43,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15467 to 13822. [2021-12-27 22:53:43,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13822 states, 13821 states have (on average 1.0231531727081977) internal successors, (14141), 13821 states have internal predecessors, (14141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:43,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13822 states to 13822 states and 14141 transitions. [2021-12-27 22:53:43,824 INFO L78 Accepts]: Start accepts. Automaton has 13822 states and 14141 transitions. Word has length 1600 [2021-12-27 22:53:43,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:53:43,824 INFO L470 AbstractCegarLoop]: Abstraction has 13822 states and 14141 transitions. [2021-12-27 22:53:43,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:43,824 INFO L276 IsEmpty]: Start isEmpty. Operand 13822 states and 14141 transitions. [2021-12-27 22:53:43,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1772 [2021-12-27 22:53:43,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:53:43,848 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-27 22:53:43,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-27 22:53:44,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-27 22:53:44,064 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:53:44,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:53:44,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1596416916, now seen corresponding path program 1 times [2021-12-27 22:53:44,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:53:44,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416843568] [2021-12-27 22:53:44,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:44,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:53:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6219 backedges. 3508 proven. 743 refuted. 0 times theorem prover too weak. 1968 trivial. 0 not checked. [2021-12-27 22:53:44,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:53:44,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416843568] [2021-12-27 22:53:44,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416843568] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 22:53:44,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021099331] [2021-12-27 22:53:44,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:44,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:53:44,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:53:44,614 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 22:53:44,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-27 22:53:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:44,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 2068 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-27 22:53:44,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 22:53:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6219 backedges. 4141 proven. 0 refuted. 0 times theorem prover too weak. 2078 trivial. 0 not checked. [2021-12-27 22:53:47,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 22:53:47,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021099331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:53:47,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 22:53:47,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-12-27 22:53:47,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642845934] [2021-12-27 22:53:47,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:53:47,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:53:47,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:53:47,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:53:47,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-27 22:53:47,056 INFO L87 Difference]: Start difference. First operand 13822 states and 14141 transitions. Second operand has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:47,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:53:47,626 INFO L93 Difference]: Finished difference Result 27313 states and 27949 transitions. [2021-12-27 22:53:47,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:53:47,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 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 1771 [2021-12-27 22:53:47,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:53:47,639 INFO L225 Difference]: With dead ends: 27313 [2021-12-27 22:53:47,639 INFO L226 Difference]: Without dead ends: 13822 [2021-12-27 22:53:47,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1778 GetRequests, 1771 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-27 22:53:47,645 INFO L933 BasicCegarLoop]: 416 mSDtfsCounter, 62 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-27 22:53:47,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 422 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-27 22:53:47,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13822 states. [2021-12-27 22:53:47,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13822 to 13822. [2021-12-27 22:53:47,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13822 states, 13821 states have (on average 1.0230084653787714) internal successors, (14139), 13821 states have internal predecessors, (14139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:47,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13822 states to 13822 states and 14139 transitions. [2021-12-27 22:53:47,793 INFO L78 Accepts]: Start accepts. Automaton has 13822 states and 14139 transitions. Word has length 1771 [2021-12-27 22:53:47,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:53:47,794 INFO L470 AbstractCegarLoop]: Abstraction has 13822 states and 14139 transitions. [2021-12-27 22:53:47,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:47,795 INFO L276 IsEmpty]: Start isEmpty. Operand 13822 states and 14139 transitions. [2021-12-27 22:53:47,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1920 [2021-12-27 22:53:47,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:53:47,831 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:53:47,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-27 22:53:48,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-27 22:53:48,032 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:53:48,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:53:48,032 INFO L85 PathProgramCache]: Analyzing trace with hash -997858177, now seen corresponding path program 1 times [2021-12-27 22:53:48,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:53:48,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126084603] [2021-12-27 22:53:48,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:48,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:53:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:48,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7108 backedges. 3841 proven. 1581 refuted. 0 times theorem prover too weak. 1686 trivial. 0 not checked. [2021-12-27 22:53:48,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:53:48,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126084603] [2021-12-27 22:53:48,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126084603] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 22:53:48,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985937297] [2021-12-27 22:53:48,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:48,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:53:48,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:53:48,634 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 22:53:48,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-27 22:53:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:48,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 2252 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 22:53:48,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 22:53:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7108 backedges. 3817 proven. 0 refuted. 0 times theorem prover too weak. 3291 trivial. 0 not checked. [2021-12-27 22:53:50,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 22:53:50,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985937297] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:53:50,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 22:53:50,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-27 22:53:50,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617689761] [2021-12-27 22:53:50,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:53:50,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:53:50,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:53:50,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:53:50,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-27 22:53:50,871 INFO L87 Difference]: Start difference. First operand 13822 states and 14139 transitions. Second operand has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:51,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:53:51,493 INFO L93 Difference]: Finished difference Result 27971 states and 28618 transitions. [2021-12-27 22:53:51,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:53:51,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 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 1919 [2021-12-27 22:53:51,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:53:51,506 INFO L225 Difference]: With dead ends: 27971 [2021-12-27 22:53:51,506 INFO L226 Difference]: Without dead ends: 14480 [2021-12-27 22:53:51,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1924 GetRequests, 1920 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-27 22:53:51,513 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 263 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-27 22:53:51,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 426 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-27 22:53:51,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14480 states. [2021-12-27 22:53:51,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14480 to 14480. [2021-12-27 22:53:51,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14480 states, 14479 states have (on average 1.0223081704537607) internal successors, (14802), 14479 states have internal predecessors, (14802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:51,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14480 states to 14480 states and 14802 transitions. [2021-12-27 22:53:51,632 INFO L78 Accepts]: Start accepts. Automaton has 14480 states and 14802 transitions. Word has length 1919 [2021-12-27 22:53:51,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:53:51,633 INFO L470 AbstractCegarLoop]: Abstraction has 14480 states and 14802 transitions. [2021-12-27 22:53:51,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:53:51,634 INFO L276 IsEmpty]: Start isEmpty. Operand 14480 states and 14802 transitions. [2021-12-27 22:53:51,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2004 [2021-12-27 22:53:51,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:53:51,664 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:53:51,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-27 22:53:51,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:53:51,873 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:53:51,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:53:51,873 INFO L85 PathProgramCache]: Analyzing trace with hash -641509306, now seen corresponding path program 1 times [2021-12-27 22:53:51,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:53:51,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484562762] [2021-12-27 22:53:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:51,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:53:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8234 backedges. 2001 proven. 4354 refuted. 0 times theorem prover too weak. 1879 trivial. 0 not checked. [2021-12-27 22:53:52,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:53:52,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484562762] [2021-12-27 22:53:52,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484562762] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 22:53:52,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135915657] [2021-12-27 22:53:52,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:53:52,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:53:52,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:53:52,602 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 22:53:52,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-27 22:53:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:53:52,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 2346 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-27 22:53:52,969 INFO L286 TraceCheckSpWp]: Computing forward predicates...