./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label45.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label45.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 e46cda06cd6f3e72cb5a00e680e37793de7d3fd440c55f6638f7eefc5d4b52af --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:05:41,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:05:41,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:05:41,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:05:41,445 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:05:41,447 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:05:41,448 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:05:41,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:05:41,454 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:05:41,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:05:41,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:05:41,459 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:05:41,459 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:05:41,461 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:05:41,462 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:05:41,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:05:41,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:05:41,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:05:41,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:05:41,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:05:41,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:05:41,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:05:41,473 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:05:41,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:05:41,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:05:41,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:05:41,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:05:41,481 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:05:41,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:05:41,482 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:05:41,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:05:41,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:05:41,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:05:41,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:05:41,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:05:41,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:05:41,487 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:05:41,487 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:05:41,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:05:41,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:05:41,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:05:41,489 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:05:41,517 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:05:41,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:05:41,518 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:05:41,518 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:05:41,518 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:05:41,519 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:05:41,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:05:41,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:05:41,519 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:05:41,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:05:41,520 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:05:41,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:05:41,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:05:41,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:05:41,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:05:41,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:05:41,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:05:41,521 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:05:41,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:05:41,522 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:05:41,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:05:41,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:05:41,522 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:05:41,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:05:41,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:05:41,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:05:41,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:05:41,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:05:41,523 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:05:41,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:05:41,523 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:05:41,524 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:05:41,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:05:41,524 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:05:41,524 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e46cda06cd6f3e72cb5a00e680e37793de7d3fd440c55f6638f7eefc5d4b52af [2021-12-15 09:05:41,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:05:41,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:05:41,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:05:41,732 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:05:41,732 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:05:41,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label45.c [2021-12-15 09:05:41,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85251b057/7c43ab68293e4ec4ba9e1c46b4705e4c/FLAGf68f94378 [2021-12-15 09:05:42,329 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:05:42,330 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label45.c [2021-12-15 09:05:42,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85251b057/7c43ab68293e4ec4ba9e1c46b4705e4c/FLAGf68f94378 [2021-12-15 09:05:42,831 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85251b057/7c43ab68293e4ec4ba9e1c46b4705e4c [2021-12-15 09:05:42,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:05:42,835 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:05:42,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:05:42,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:05:42,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:05:42,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:05:42" (1/1) ... [2021-12-15 09:05:42,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a904171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:42, skipping insertion in model container [2021-12-15 09:05:42,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:05:42" (1/1) ... [2021-12-15 09:05:42,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:05:42,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:05:43,256 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/Problem03_label45.c[53653,53666] [2021-12-15 09:05:43,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:05:43,288 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:05:43,417 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/Problem03_label45.c[53653,53666] [2021-12-15 09:05:43,431 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:05:43,442 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:05:43,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:43 WrapperNode [2021-12-15 09:05:43,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:05:43,444 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:05:43,444 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:05:43,444 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:05:43,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:43" (1/1) ... [2021-12-15 09:05:43,477 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:43" (1/1) ... [2021-12-15 09:05:43,539 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-15 09:05:43,539 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:05:43,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:05:43,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:05:43,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:05:43,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:43" (1/1) ... [2021-12-15 09:05:43,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:43" (1/1) ... [2021-12-15 09:05:43,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:43" (1/1) ... [2021-12-15 09:05:43,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:43" (1/1) ... [2021-12-15 09:05:43,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:43" (1/1) ... [2021-12-15 09:05:43,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:43" (1/1) ... [2021-12-15 09:05:43,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:43" (1/1) ... [2021-12-15 09:05:43,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:05:43,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:05:43,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:05:43,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:05:43,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:43" (1/1) ... [2021-12-15 09:05:43,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:05:43,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:05:43,710 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 09:05:43,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 09:05:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:05:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:05:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:05:43,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:05:43,832 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:05:43,833 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:05:44,978 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:05:44,990 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:05:44,990 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:05:44,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:05:44 BoogieIcfgContainer [2021-12-15 09:05:44,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:05:44,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:05:44,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:05:44,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:05:44,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:05:42" (1/3) ... [2021-12-15 09:05:44,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38d3391f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:05:44, skipping insertion in model container [2021-12-15 09:05:44,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:43" (2/3) ... [2021-12-15 09:05:44,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38d3391f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:05:44, skipping insertion in model container [2021-12-15 09:05:44,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:05:44" (3/3) ... [2021-12-15 09:05:44,999 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label45.c [2021-12-15 09:05:45,003 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:05:45,003 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:05:45,052 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:05:45,057 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 09:05:45,057 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:05:45,082 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:45,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-15 09:05:45,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:45,102 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:45,103 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:45,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:45,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1107694590, now seen corresponding path program 1 times [2021-12-15 09:05:45,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:45,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225769424] [2021-12-15 09:05:45,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:45,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:05:45,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:45,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225769424] [2021-12-15 09:05:45,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225769424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:45,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:45,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:45,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351301222] [2021-12-15 09:05:45,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:45,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:45,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:45,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:45,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:45,575 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:46,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:46,361 INFO L93 Difference]: Finished difference Result 829 states and 1478 transitions. [2021-12-15 09:05:46,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:46,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 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 144 [2021-12-15 09:05:46,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:46,372 INFO L225 Difference]: With dead ends: 829 [2021-12-15 09:05:46,372 INFO L226 Difference]: Without dead ends: 463 [2021-12-15 09:05:46,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:46,377 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 147 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:46,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 127 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:05:46,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-12-15 09:05:46,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 449. [2021-12-15 09:05:46,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.6183035714285714) internal successors, (725), 448 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:46,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 725 transitions. [2021-12-15 09:05:46,429 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 725 transitions. Word has length 144 [2021-12-15 09:05:46,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:46,429 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 725 transitions. [2021-12-15 09:05:46,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:46,430 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 725 transitions. [2021-12-15 09:05:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-15 09:05:46,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:46,433 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:46,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:05:46,433 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:46,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:46,434 INFO L85 PathProgramCache]: Analyzing trace with hash 930993362, now seen corresponding path program 1 times [2021-12-15 09:05:46,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:46,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274923677] [2021-12-15 09:05:46,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:46,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:05:46,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:46,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274923677] [2021-12-15 09:05:46,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274923677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:46,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:46,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:46,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737233221] [2021-12-15 09:05:46,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:46,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:46,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:46,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:46,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:46,548 INFO L87 Difference]: Start difference. First operand 449 states and 725 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:47,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:47,150 INFO L93 Difference]: Finished difference Result 1323 states and 2147 transitions. [2021-12-15 09:05:47,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:47,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-12-15 09:05:47,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:47,153 INFO L225 Difference]: With dead ends: 1323 [2021-12-15 09:05:47,153 INFO L226 Difference]: Without dead ends: 876 [2021-12-15 09:05:47,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:47,160 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 267 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:47,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 132 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:05:47,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-12-15 09:05:47,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 868. [2021-12-15 09:05:47,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 1.5340253748558246) internal successors, (1330), 867 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:47,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1330 transitions. [2021-12-15 09:05:47,199 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1330 transitions. Word has length 149 [2021-12-15 09:05:47,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:47,199 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1330 transitions. [2021-12-15 09:05:47,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:47,199 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1330 transitions. [2021-12-15 09:05:47,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-15 09:05:47,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:47,203 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:05:47,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:05:47,203 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:47,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:47,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1297183571, now seen corresponding path program 1 times [2021-12-15 09:05:47,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:47,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331392934] [2021-12-15 09:05:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:47,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:05:47,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:47,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331392934] [2021-12-15 09:05:47,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331392934] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:05:47,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044470722] [2021-12-15 09:05:47,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:47,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:47,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:05:47,296 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:05:47,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:05:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:47,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:05:47,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:05:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:05:47,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:05:47,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044470722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:47,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:05:47,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 09:05:47,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767449149] [2021-12-15 09:05:47,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:47,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:47,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:47,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:47,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:47,698 INFO L87 Difference]: Start difference. First operand 868 states and 1330 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:48,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:48,281 INFO L93 Difference]: Finished difference Result 2576 states and 3961 transitions. [2021-12-15 09:05:48,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:48,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 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 151 [2021-12-15 09:05:48,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:48,289 INFO L225 Difference]: With dead ends: 2576 [2021-12-15 09:05:48,289 INFO L226 Difference]: Without dead ends: 1710 [2021-12-15 09:05:48,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:48,292 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 99 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:48,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 176 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:05:48,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-12-15 09:05:48,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1692. [2021-12-15 09:05:48,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 1.5156712004730928) internal successors, (2563), 1691 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:48,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 2563 transitions. [2021-12-15 09:05:48,314 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 2563 transitions. Word has length 151 [2021-12-15 09:05:48,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:48,315 INFO L470 AbstractCegarLoop]: Abstraction has 1692 states and 2563 transitions. [2021-12-15 09:05:48,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:48,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 2563 transitions. [2021-12-15 09:05:48,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-15 09:05:48,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:48,320 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:48,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 09:05:48,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:48,537 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:48,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:48,537 INFO L85 PathProgramCache]: Analyzing trace with hash 412120481, now seen corresponding path program 1 times [2021-12-15 09:05:48,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:48,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330987445] [2021-12-15 09:05:48,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:48,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 09:05:48,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:48,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330987445] [2021-12-15 09:05:48,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330987445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:48,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:48,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:48,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701012206] [2021-12-15 09:05:48,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:48,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:48,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:48,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:48,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:48,593 INFO L87 Difference]: Start difference. First operand 1692 states and 2563 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:49,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:49,183 INFO L93 Difference]: Finished difference Result 5047 states and 7658 transitions. [2021-12-15 09:05:49,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:49,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 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 157 [2021-12-15 09:05:49,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:49,192 INFO L225 Difference]: With dead ends: 5047 [2021-12-15 09:05:49,192 INFO L226 Difference]: Without dead ends: 3357 [2021-12-15 09:05:49,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:49,194 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 283 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:49,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 105 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:05:49,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2021-12-15 09:05:49,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 3349. [2021-12-15 09:05:49,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3349 states, 3348 states have (on average 1.497610513739546) internal successors, (5014), 3348 states have internal predecessors, (5014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:49,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3349 states to 3349 states and 5014 transitions. [2021-12-15 09:05:49,239 INFO L78 Accepts]: Start accepts. Automaton has 3349 states and 5014 transitions. Word has length 157 [2021-12-15 09:05:49,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:49,239 INFO L470 AbstractCegarLoop]: Abstraction has 3349 states and 5014 transitions. [2021-12-15 09:05:49,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:49,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3349 states and 5014 transitions. [2021-12-15 09:05:49,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-15 09:05:49,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:49,243 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:05:49,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:05:49,243 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:49,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:49,243 INFO L85 PathProgramCache]: Analyzing trace with hash 31298572, now seen corresponding path program 1 times [2021-12-15 09:05:49,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:49,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935002214] [2021-12-15 09:05:49,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:49,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:49,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 09:05:49,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:49,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935002214] [2021-12-15 09:05:49,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935002214] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:49,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:49,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:49,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513475914] [2021-12-15 09:05:49,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:49,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:49,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:49,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:49,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:49,280 INFO L87 Difference]: Start difference. First operand 3349 states and 5014 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:49,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:49,893 INFO L93 Difference]: Finished difference Result 9979 states and 14956 transitions. [2021-12-15 09:05:49,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:49,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 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 158 [2021-12-15 09:05:49,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:49,910 INFO L225 Difference]: With dead ends: 9979 [2021-12-15 09:05:49,910 INFO L226 Difference]: Without dead ends: 6632 [2021-12-15 09:05:49,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:49,914 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 233 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:49,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 149 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:05:49,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6632 states. [2021-12-15 09:05:49,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6632 to 6625. [2021-12-15 09:05:49,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6625 states, 6624 states have (on average 1.4290458937198067) internal successors, (9466), 6624 states have internal predecessors, (9466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:49,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6625 states to 6625 states and 9466 transitions. [2021-12-15 09:05:49,998 INFO L78 Accepts]: Start accepts. Automaton has 6625 states and 9466 transitions. Word has length 158 [2021-12-15 09:05:49,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:49,999 INFO L470 AbstractCegarLoop]: Abstraction has 6625 states and 9466 transitions. [2021-12-15 09:05:49,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:49,999 INFO L276 IsEmpty]: Start isEmpty. Operand 6625 states and 9466 transitions. [2021-12-15 09:05:50,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-15 09:05:50,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:50,007 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:50,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:05:50,008 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:50,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:50,008 INFO L85 PathProgramCache]: Analyzing trace with hash -746804845, now seen corresponding path program 1 times [2021-12-15 09:05:50,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:50,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719610820] [2021-12-15 09:05:50,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:50,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 09:05:50,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:50,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719610820] [2021-12-15 09:05:50,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719610820] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:50,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:50,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:50,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935254527] [2021-12-15 09:05:50,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:50,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:50,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:50,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:50,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:50,074 INFO L87 Difference]: Start difference. First operand 6625 states and 9466 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:50,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:50,702 INFO L93 Difference]: Finished difference Result 16536 states and 23558 transitions. [2021-12-15 09:05:50,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:50,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 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 161 [2021-12-15 09:05:50,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:50,730 INFO L225 Difference]: With dead ends: 16536 [2021-12-15 09:05:50,731 INFO L226 Difference]: Without dead ends: 9913 [2021-12-15 09:05:50,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:50,743 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 217 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:50,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 168 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:05:50,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9913 states. [2021-12-15 09:05:50,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9913 to 9903. [2021-12-15 09:05:50,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9903 states, 9902 states have (on average 1.4088063017572208) internal successors, (13950), 9902 states have internal predecessors, (13950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9903 states to 9903 states and 13950 transitions. [2021-12-15 09:05:50,897 INFO L78 Accepts]: Start accepts. Automaton has 9903 states and 13950 transitions. Word has length 161 [2021-12-15 09:05:50,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:50,897 INFO L470 AbstractCegarLoop]: Abstraction has 9903 states and 13950 transitions. [2021-12-15 09:05:50,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:50,898 INFO L276 IsEmpty]: Start isEmpty. Operand 9903 states and 13950 transitions. [2021-12-15 09:05:50,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-15 09:05:50,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:50,907 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:50,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:05:50,908 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:50,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:50,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1646465925, now seen corresponding path program 1 times [2021-12-15 09:05:50,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:50,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706939442] [2021-12-15 09:05:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:50,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 09:05:50,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:50,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706939442] [2021-12-15 09:05:50,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706939442] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:50,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:50,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:50,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913418124] [2021-12-15 09:05:50,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:50,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:50,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:50,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:50,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:50,957 INFO L87 Difference]: Start difference. First operand 9903 states and 13950 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:51,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:51,595 INFO L93 Difference]: Finished difference Result 28935 states and 40804 transitions. [2021-12-15 09:05:51,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:51,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 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 163 [2021-12-15 09:05:51,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:51,638 INFO L225 Difference]: With dead ends: 28935 [2021-12-15 09:05:51,638 INFO L226 Difference]: Without dead ends: 19034 [2021-12-15 09:05:51,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:51,654 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 216 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:51,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 194 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:05:51,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19034 states. [2021-12-15 09:05:51,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19034 to 15989. [2021-12-15 09:05:51,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15989 states, 15988 states have (on average 1.2964098073555166) internal successors, (20727), 15988 states have internal predecessors, (20727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:51,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15989 states to 15989 states and 20727 transitions. [2021-12-15 09:05:51,928 INFO L78 Accepts]: Start accepts. Automaton has 15989 states and 20727 transitions. Word has length 163 [2021-12-15 09:05:51,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:51,929 INFO L470 AbstractCegarLoop]: Abstraction has 15989 states and 20727 transitions. [2021-12-15 09:05:51,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:51,929 INFO L276 IsEmpty]: Start isEmpty. Operand 15989 states and 20727 transitions. [2021-12-15 09:05:51,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-15 09:05:51,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:51,943 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1] [2021-12-15 09:05:51,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:05:51,944 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:51,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:51,944 INFO L85 PathProgramCache]: Analyzing trace with hash 389848661, now seen corresponding path program 1 times [2021-12-15 09:05:51,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:51,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054912391] [2021-12-15 09:05:51,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:51,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-15 09:05:51,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:51,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054912391] [2021-12-15 09:05:51,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054912391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:51,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:51,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:05:51,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245551369] [2021-12-15 09:05:51,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:51,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:51,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:51,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:51,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:51,996 INFO L87 Difference]: Start difference. First operand 15989 states and 20727 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:52,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:52,706 INFO L93 Difference]: Finished difference Result 35450 states and 46186 transitions. [2021-12-15 09:05:52,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:52,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 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 172 [2021-12-15 09:05:52,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:52,736 INFO L225 Difference]: With dead ends: 35450 [2021-12-15 09:05:52,737 INFO L226 Difference]: Without dead ends: 19463 [2021-12-15 09:05:52,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:52,752 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 222 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:52,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 370 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:05:52,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19463 states. [2021-12-15 09:05:53,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19463 to 19457. [2021-12-15 09:05:53,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19457 states, 19456 states have (on average 1.2723581414473684) internal successors, (24755), 19456 states have internal predecessors, (24755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:53,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19457 states to 19457 states and 24755 transitions. [2021-12-15 09:05:53,172 INFO L78 Accepts]: Start accepts. Automaton has 19457 states and 24755 transitions. Word has length 172 [2021-12-15 09:05:53,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:53,172 INFO L470 AbstractCegarLoop]: Abstraction has 19457 states and 24755 transitions. [2021-12-15 09:05:53,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:53,172 INFO L276 IsEmpty]: Start isEmpty. Operand 19457 states and 24755 transitions. [2021-12-15 09:05:53,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-15 09:05:53,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:53,190 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 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] [2021-12-15 09:05:53,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:05:53,190 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:53,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:53,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1622857335, now seen corresponding path program 1 times [2021-12-15 09:05:53,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:53,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403173748] [2021-12-15 09:05:53,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:53,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-15 09:05:53,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:53,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403173748] [2021-12-15 09:05:53,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403173748] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:53,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:53,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:05:53,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702446125] [2021-12-15 09:05:53,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:53,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:05:53,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:53,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:05:53,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:05:53,245 INFO L87 Difference]: Start difference. First operand 19457 states and 24755 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:54,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:54,059 INFO L93 Difference]: Finished difference Result 38472 states and 49037 transitions. [2021-12-15 09:05:54,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:05:54,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 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 176 [2021-12-15 09:05:54,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:54,085 INFO L225 Difference]: With dead ends: 38472 [2021-12-15 09:05:54,085 INFO L226 Difference]: Without dead ends: 19017 [2021-12-15 09:05:54,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:05:54,096 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 472 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:54,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 44 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:05:54,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19017 states. [2021-12-15 09:05:54,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19017 to 19003. [2021-12-15 09:05:54,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19003 states, 19002 states have (on average 1.2341858751710346) internal successors, (23452), 19002 states have internal predecessors, (23452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:54,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19003 states to 19003 states and 23452 transitions. [2021-12-15 09:05:54,290 INFO L78 Accepts]: Start accepts. Automaton has 19003 states and 23452 transitions. Word has length 176 [2021-12-15 09:05:54,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:54,290 INFO L470 AbstractCegarLoop]: Abstraction has 19003 states and 23452 transitions. [2021-12-15 09:05:54,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:54,291 INFO L276 IsEmpty]: Start isEmpty. Operand 19003 states and 23452 transitions. [2021-12-15 09:05:54,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-15 09:05:54,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:54,305 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:54,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:05:54,306 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:54,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:54,306 INFO L85 PathProgramCache]: Analyzing trace with hash 2123624759, now seen corresponding path program 1 times [2021-12-15 09:05:54,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:54,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411370181] [2021-12-15 09:05:54,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:54,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 69 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-15 09:05:54,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:54,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411370181] [2021-12-15 09:05:54,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411370181] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:05:54,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959328068] [2021-12-15 09:05:54,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:54,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:54,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:05:54,425 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:05:54,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:05:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:54,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:05:54,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:05:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-15 09:05:54,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:05:54,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959328068] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:54,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:05:54,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 09:05:54,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939424500] [2021-12-15 09:05:54,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:54,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:54,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:54,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:54,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:54,767 INFO L87 Difference]: Start difference. First operand 19003 states and 23452 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:55,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:55,404 INFO L93 Difference]: Finished difference Result 42256 states and 52987 transitions. [2021-12-15 09:05:55,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:55,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 185 [2021-12-15 09:05:55,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:55,437 INFO L225 Difference]: With dead ends: 42256 [2021-12-15 09:05:55,437 INFO L226 Difference]: Without dead ends: 23255 [2021-12-15 09:05:55,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:55,453 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 210 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:55,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 367 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:05:55,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23255 states. [2021-12-15 09:05:55,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23255 to 20207. [2021-12-15 09:05:55,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20207 states, 20206 states have (on average 1.2064733247550232) internal successors, (24378), 20206 states have internal predecessors, (24378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:55,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20207 states to 20207 states and 24378 transitions. [2021-12-15 09:05:55,726 INFO L78 Accepts]: Start accepts. Automaton has 20207 states and 24378 transitions. Word has length 185 [2021-12-15 09:05:55,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:55,727 INFO L470 AbstractCegarLoop]: Abstraction has 20207 states and 24378 transitions. [2021-12-15 09:05:55,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:55,727 INFO L276 IsEmpty]: Start isEmpty. Operand 20207 states and 24378 transitions. [2021-12-15 09:05:55,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-15 09:05:55,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:55,737 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:55,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:05:55,953 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,SelfDestructingSolverStorable9 [2021-12-15 09:05:55,954 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:55,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:55,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1261521695, now seen corresponding path program 1 times [2021-12-15 09:05:55,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:55,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004184883] [2021-12-15 09:05:55,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:55,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:56,108 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 58 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 09:05:56,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:56,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004184883] [2021-12-15 09:05:56,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004184883] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:05:56,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145454113] [2021-12-15 09:05:56,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:56,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:56,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:05:56,110 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:05:56,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 09:05:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:56,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:05:56,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:05:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-15 09:05:56,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:05:56,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145454113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:56,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:05:56,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 09:05:56,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582125094] [2021-12-15 09:05:56,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:56,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:56,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:56,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:56,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:56,445 INFO L87 Difference]: Start difference. First operand 20207 states and 24378 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:57,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:57,138 INFO L93 Difference]: Finished difference Result 50599 states and 61352 transitions. [2021-12-15 09:05:57,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:57,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 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 197 [2021-12-15 09:05:57,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:57,180 INFO L225 Difference]: With dead ends: 50599 [2021-12-15 09:05:57,180 INFO L226 Difference]: Without dead ends: 30394 [2021-12-15 09:05:57,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:57,202 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 214 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:57,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 138 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:05:57,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30394 states. [2021-12-15 09:05:57,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30394 to 30392. [2021-12-15 09:05:57,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30392 states, 30391 states have (on average 1.1945970846632226) internal successors, (36305), 30391 states have internal predecessors, (36305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:57,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30392 states to 30392 states and 36305 transitions. [2021-12-15 09:05:57,595 INFO L78 Accepts]: Start accepts. Automaton has 30392 states and 36305 transitions. Word has length 197 [2021-12-15 09:05:57,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:57,596 INFO L470 AbstractCegarLoop]: Abstraction has 30392 states and 36305 transitions. [2021-12-15 09:05:57,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:57,596 INFO L276 IsEmpty]: Start isEmpty. Operand 30392 states and 36305 transitions. [2021-12-15 09:05:57,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-12-15 09:05:57,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:57,613 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:57,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 09:05:57,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:57,847 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:57,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:57,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1690985565, now seen corresponding path program 1 times [2021-12-15 09:05:57,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:57,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070206362] [2021-12-15 09:05:57,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:57,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 87 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-15 09:05:57,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:57,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070206362] [2021-12-15 09:05:57,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070206362] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:05:57,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774783374] [2021-12-15 09:05:57,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:57,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:57,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:05:57,922 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) [2021-12-15 09:05:57,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 09:05:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:58,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:05:58,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:05:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-15 09:05:58,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:05:58,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774783374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:58,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:05:58,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:05:58,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997571723] [2021-12-15 09:05:58,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:58,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:58,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:58,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:58,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:58,481 INFO L87 Difference]: Start difference. First operand 30392 states and 36305 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:59,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:59,081 INFO L93 Difference]: Finished difference Result 60786 states and 72615 transitions. [2021-12-15 09:05:59,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:59,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 262 [2021-12-15 09:05:59,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:59,120 INFO L225 Difference]: With dead ends: 60786 [2021-12-15 09:05:59,120 INFO L226 Difference]: Without dead ends: 30396 [2021-12-15 09:05:59,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:59,145 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 255 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:59,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 290 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:05:59,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30396 states. [2021-12-15 09:05:59,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30396 to 28971. [2021-12-15 09:05:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28971 states, 28970 states have (on average 1.1739385571280636) internal successors, (34009), 28970 states have internal predecessors, (34009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:59,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28971 states to 28971 states and 34009 transitions. [2021-12-15 09:05:59,572 INFO L78 Accepts]: Start accepts. Automaton has 28971 states and 34009 transitions. Word has length 262 [2021-12-15 09:05:59,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:59,572 INFO L470 AbstractCegarLoop]: Abstraction has 28971 states and 34009 transitions. [2021-12-15 09:05:59,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:59,573 INFO L276 IsEmpty]: Start isEmpty. Operand 28971 states and 34009 transitions. [2021-12-15 09:05:59,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-12-15 09:05:59,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:59,590 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:59,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 09:05:59,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:59,804 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:59,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:59,804 INFO L85 PathProgramCache]: Analyzing trace with hash 59935391, now seen corresponding path program 1 times [2021-12-15 09:05:59,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:59,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796369622] [2021-12-15 09:05:59,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:59,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 99 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-15 09:05:59,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:59,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796369622] [2021-12-15 09:05:59,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796369622] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:05:59,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538513759] [2021-12-15 09:05:59,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:59,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:59,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:05:59,896 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) [2021-12-15 09:05:59,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 09:06:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:00,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:06:00,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-15 09:06:00,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:00,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538513759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:00,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:00,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:06:00,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341342358] [2021-12-15 09:06:00,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:00,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:00,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:00,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:00,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:00,351 INFO L87 Difference]: Start difference. First operand 28971 states and 34009 transitions. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:00,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:00,975 INFO L93 Difference]: Finished difference Result 53632 states and 62743 transitions. [2021-12-15 09:06:00,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:00,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 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 274 [2021-12-15 09:06:00,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:01,004 INFO L225 Difference]: With dead ends: 53632 [2021-12-15 09:06:01,004 INFO L226 Difference]: Without dead ends: 24663 [2021-12-15 09:06:01,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:01,023 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 188 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:01,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 327 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:06:01,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24663 states. [2021-12-15 09:06:01,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24663 to 24662. [2021-12-15 09:06:01,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24662 states, 24661 states have (on average 1.1327196788451401) internal successors, (27934), 24661 states have internal predecessors, (27934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:01,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24662 states to 24662 states and 27934 transitions. [2021-12-15 09:06:01,377 INFO L78 Accepts]: Start accepts. Automaton has 24662 states and 27934 transitions. Word has length 274 [2021-12-15 09:06:01,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:01,377 INFO L470 AbstractCegarLoop]: Abstraction has 24662 states and 27934 transitions. [2021-12-15 09:06:01,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:01,377 INFO L276 IsEmpty]: Start isEmpty. Operand 24662 states and 27934 transitions. [2021-12-15 09:06:01,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-12-15 09:06:01,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:01,393 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:01,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 09:06:01,608 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,SelfDestructingSolverStorable12 [2021-12-15 09:06:01,608 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:01,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:01,609 INFO L85 PathProgramCache]: Analyzing trace with hash -836795370, now seen corresponding path program 1 times [2021-12-15 09:06:01,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:01,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733574321] [2021-12-15 09:06:01,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:01,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 139 proven. 6 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-12-15 09:06:01,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:01,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733574321] [2021-12-15 09:06:01,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733574321] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:06:01,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366263476] [2021-12-15 09:06:01,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:01,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:01,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:01,689 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) [2021-12-15 09:06:01,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 09:06:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:01,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:06:01,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-12-15 09:06:02,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:02,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366263476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:02,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:02,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:06:02,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098024401] [2021-12-15 09:06:02,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:02,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:02,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:02,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:02,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:02,256 INFO L87 Difference]: Start difference. First operand 24662 states and 27934 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:02,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:02,953 INFO L93 Difference]: Finished difference Result 59470 states and 67270 transitions. [2021-12-15 09:06:02,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:02,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 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 308 [2021-12-15 09:06:02,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:02,987 INFO L225 Difference]: With dead ends: 59470 [2021-12-15 09:06:02,988 INFO L226 Difference]: Without dead ends: 34810 [2021-12-15 09:06:03,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:03,032 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 204 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:03,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 339 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:06:03,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34810 states. [2021-12-15 09:06:03,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34810 to 24437. [2021-12-15 09:06:03,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24437 states, 24436 states have (on average 1.1088148633164183) internal successors, (27095), 24436 states have internal predecessors, (27095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:03,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24437 states to 24437 states and 27095 transitions. [2021-12-15 09:06:03,422 INFO L78 Accepts]: Start accepts. Automaton has 24437 states and 27095 transitions. Word has length 308 [2021-12-15 09:06:03,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:03,422 INFO L470 AbstractCegarLoop]: Abstraction has 24437 states and 27095 transitions. [2021-12-15 09:06:03,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:03,423 INFO L276 IsEmpty]: Start isEmpty. Operand 24437 states and 27095 transitions. [2021-12-15 09:06:03,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-12-15 09:06:03,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:03,441 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 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, 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] [2021-12-15 09:06:03,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-15 09:06:03,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:03,650 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:03,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:03,651 INFO L85 PathProgramCache]: Analyzing trace with hash 989884502, now seen corresponding path program 1 times [2021-12-15 09:06:03,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:03,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699717524] [2021-12-15 09:06:03,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:03,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:03,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 311 proven. 6 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-12-15 09:06:03,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:03,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699717524] [2021-12-15 09:06:03,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699717524] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:06:03,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595072273] [2021-12-15 09:06:03,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:03,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:03,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:03,936 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) [2021-12-15 09:06:03,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 09:06:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:04,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:06:04,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 311 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-15 09:06:04,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:04,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595072273] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:04,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:04,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 09:06:04,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417793877] [2021-12-15 09:06:04,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:04,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:04,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:04,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:04,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:04,436 INFO L87 Difference]: Start difference. First operand 24437 states and 27095 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:04,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:04,787 INFO L93 Difference]: Finished difference Result 73099 states and 81062 transitions. [2021-12-15 09:06:04,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:04,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 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 434 [2021-12-15 09:06:04,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:04,835 INFO L225 Difference]: With dead ends: 73099 [2021-12-15 09:06:04,835 INFO L226 Difference]: Without dead ends: 48664 [2021-12-15 09:06:04,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:04,863 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 211 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:04,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 525 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 09:06:04,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48664 states. [2021-12-15 09:06:05,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48664 to 47030. [2021-12-15 09:06:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47030 states, 47029 states have (on average 1.104701354483404) internal successors, (51953), 47029 states have internal predecessors, (51953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:05,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47030 states to 47030 states and 51953 transitions. [2021-12-15 09:06:05,530 INFO L78 Accepts]: Start accepts. Automaton has 47030 states and 51953 transitions. Word has length 434 [2021-12-15 09:06:05,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:05,531 INFO L470 AbstractCegarLoop]: Abstraction has 47030 states and 51953 transitions. [2021-12-15 09:06:05,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:05,531 INFO L276 IsEmpty]: Start isEmpty. Operand 47030 states and 51953 transitions. [2021-12-15 09:06:05,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-12-15 09:06:05,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:05,548 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:06:05,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 09:06:05,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:05,765 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:05,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:05,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1911495861, now seen corresponding path program 1 times [2021-12-15 09:06:05,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:05,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417149478] [2021-12-15 09:06:05,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:05,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 362 proven. 18 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-12-15 09:06:05,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:05,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417149478] [2021-12-15 09:06:05,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417149478] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:06:05,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863225940] [2021-12-15 09:06:05,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:05,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:05,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:05,897 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) [2021-12-15 09:06:05,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 09:06:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:06,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:06:06,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 368 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-12-15 09:06:06,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:06,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863225940] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:06,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:06,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 09:06:06,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995161759] [2021-12-15 09:06:06,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:06,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:06,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:06,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:06,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:06,701 INFO L87 Difference]: Start difference. First operand 47030 states and 51953 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:07,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:07,111 INFO L93 Difference]: Finished difference Result 129469 states and 142930 transitions. [2021-12-15 09:06:07,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:07,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 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 434 [2021-12-15 09:06:07,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:07,208 INFO L225 Difference]: With dead ends: 129469 [2021-12-15 09:06:07,208 INFO L226 Difference]: Without dead ends: 82441 [2021-12-15 09:06:07,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:07,249 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 322 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:07,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 564 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 09:06:07,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82441 states. [2021-12-15 09:06:08,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82441 to 82439. [2021-12-15 09:06:08,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82439 states, 82438 states have (on average 1.1022101458065454) internal successors, (90864), 82438 states have internal predecessors, (90864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:08,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82439 states to 82439 states and 90864 transitions. [2021-12-15 09:06:08,455 INFO L78 Accepts]: Start accepts. Automaton has 82439 states and 90864 transitions. Word has length 434 [2021-12-15 09:06:08,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:08,455 INFO L470 AbstractCegarLoop]: Abstraction has 82439 states and 90864 transitions. [2021-12-15 09:06:08,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:08,455 INFO L276 IsEmpty]: Start isEmpty. Operand 82439 states and 90864 transitions. [2021-12-15 09:06:08,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2021-12-15 09:06:08,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:08,486 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 5, 5, 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, 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] [2021-12-15 09:06:08,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 09:06:08,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-15 09:06:08,700 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:08,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:08,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1297717386, now seen corresponding path program 1 times [2021-12-15 09:06:08,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:08,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501309157] [2021-12-15 09:06:08,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:08,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 376 proven. 0 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-12-15 09:06:08,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:09,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501309157] [2021-12-15 09:06:09,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501309157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:09,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:09,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:06:09,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857479358] [2021-12-15 09:06:09,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:09,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:06:09,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:09,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:06:09,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:06:09,002 INFO L87 Difference]: Start difference. First operand 82439 states and 90864 transitions. Second operand has 4 states, 4 states have (on average 73.0) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:10,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:10,260 INFO L93 Difference]: Finished difference Result 229994 states and 253393 transitions. [2021-12-15 09:06:10,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:06:10,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 73.0) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 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 455 [2021-12-15 09:06:10,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:10,427 INFO L225 Difference]: With dead ends: 229994 [2021-12-15 09:06:10,428 INFO L226 Difference]: Without dead ends: 147557 [2021-12-15 09:06:10,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:06:10,469 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 617 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:10,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 48 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:06:10,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147557 states. [2021-12-15 09:06:12,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147557 to 145923. [2021-12-15 09:06:12,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145923 states, 145922 states have (on average 1.1019585806115595) internal successors, (160800), 145922 states have internal predecessors, (160800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:12,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145923 states to 145923 states and 160800 transitions. [2021-12-15 09:06:12,783 INFO L78 Accepts]: Start accepts. Automaton has 145923 states and 160800 transitions. Word has length 455 [2021-12-15 09:06:12,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:12,783 INFO L470 AbstractCegarLoop]: Abstraction has 145923 states and 160800 transitions. [2021-12-15 09:06:12,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.0) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:12,783 INFO L276 IsEmpty]: Start isEmpty. Operand 145923 states and 160800 transitions. [2021-12-15 09:06:12,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2021-12-15 09:06:12,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:12,857 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:12,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 09:06:12,858 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:12,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:12,858 INFO L85 PathProgramCache]: Analyzing trace with hash 2004461957, now seen corresponding path program 1 times [2021-12-15 09:06:12,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:12,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842080978] [2021-12-15 09:06:12,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:12,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 217 proven. 6 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2021-12-15 09:06:13,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:13,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842080978] [2021-12-15 09:06:13,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842080978] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:06:13,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961925233] [2021-12-15 09:06:13,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:13,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:13,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:13,020 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:06:13,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 09:06:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:13,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:06:13,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:13,754 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2021-12-15 09:06:13,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:13,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961925233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:13,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:13,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:06:13,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69013841] [2021-12-15 09:06:13,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:13,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:13,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:13,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:13,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:13,756 INFO L87 Difference]: Start difference. First operand 145923 states and 160800 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:15,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:15,390 INFO L93 Difference]: Finished difference Result 398168 states and 438854 transitions. [2021-12-15 09:06:15,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:15,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 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 [2021-12-15 09:06:15,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:15,782 INFO L225 Difference]: With dead ends: 398168 [2021-12-15 09:06:15,782 INFO L226 Difference]: Without dead ends: 252247 [2021-12-15 09:06:15,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:15,871 INFO L933 BasicCegarLoop]: 580 mSDtfsCounter, 286 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:15,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 806 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 09:06:16,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252247 states. [2021-12-15 09:06:19,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252247 to 252226. [2021-12-15 09:06:19,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252226 states, 252225 states have (on average 1.0930914857765883) internal successors, (275705), 252225 states have internal predecessors, (275705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252226 states to 252226 states and 275705 transitions. [2021-12-15 09:06:19,899 INFO L78 Accepts]: Start accepts. Automaton has 252226 states and 275705 transitions. Word has length 462 [2021-12-15 09:06:19,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:19,900 INFO L470 AbstractCegarLoop]: Abstraction has 252226 states and 275705 transitions. [2021-12-15 09:06:19,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:19,900 INFO L276 IsEmpty]: Start isEmpty. Operand 252226 states and 275705 transitions. [2021-12-15 09:06:19,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2021-12-15 09:06:19,981 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:19,981 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-15 09:06:19,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 09:06:20,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-15 09:06:20,199 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:20,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:20,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1952337020, now seen corresponding path program 1 times [2021-12-15 09:06:20,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:20,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366118513] [2021-12-15 09:06:20,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:20,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 345 proven. 190 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-15 09:06:20,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:20,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366118513] [2021-12-15 09:06:20,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366118513] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:06:20,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216466926] [2021-12-15 09:06:20,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:20,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:20,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:20,412 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:06:20,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 09:06:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:20,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:06:20,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 559 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-15 09:06:21,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:21,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216466926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:21,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:21,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:06:21,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177066299] [2021-12-15 09:06:21,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:21,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:21,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:21,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:21,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:21,560 INFO L87 Difference]: Start difference. First operand 252226 states and 275705 transitions. Second operand has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:23,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:23,403 INFO L93 Difference]: Finished difference Result 535166 states and 584118 transitions. [2021-12-15 09:06:23,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:23,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 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 490 [2021-12-15 09:06:23,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:24,081 INFO L225 Difference]: With dead ends: 535166 [2021-12-15 09:06:24,081 INFO L226 Difference]: Without dead ends: 282942 [2021-12-15 09:06:24,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:24,176 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 115 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:24,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 352 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:06:24,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282942 states. [2021-12-15 09:06:27,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282942 to 274694. [2021-12-15 09:06:27,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274694 states, 274693 states have (on average 1.0842467773113986) internal successors, (297835), 274693 states have internal predecessors, (297835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:28,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274694 states to 274694 states and 297835 transitions. [2021-12-15 09:06:28,244 INFO L78 Accepts]: Start accepts. Automaton has 274694 states and 297835 transitions. Word has length 490 [2021-12-15 09:06:28,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:28,245 INFO L470 AbstractCegarLoop]: Abstraction has 274694 states and 297835 transitions. [2021-12-15 09:06:28,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:28,245 INFO L276 IsEmpty]: Start isEmpty. Operand 274694 states and 297835 transitions. [2021-12-15 09:06:28,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2021-12-15 09:06:28,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:28,405 INFO L514 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:28,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 09:06:28,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:28,620 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:28,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:28,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1820686194, now seen corresponding path program 1 times [2021-12-15 09:06:28,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:28,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671837615] [2021-12-15 09:06:28,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:28,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 590 proven. 154 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-15 09:06:29,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:29,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671837615] [2021-12-15 09:06:29,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671837615] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:06:29,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473291905] [2021-12-15 09:06:29,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:29,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:29,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:29,016 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:06:29,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 09:06:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:29,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 09:06:29,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 744 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-15 09:06:30,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:30,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473291905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:30,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:30,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-12-15 09:06:30,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174760650] [2021-12-15 09:06:30,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:30,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:06:30,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:30,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:06:30,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:06:30,574 INFO L87 Difference]: Start difference. First operand 274694 states and 297835 transitions. Second operand has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:32,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:32,901 INFO L93 Difference]: Finished difference Result 568202 states and 615797 transitions. [2021-12-15 09:06:32,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:06:32,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 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 552 [2021-12-15 09:06:32,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:33,369 INFO L225 Difference]: With dead ends: 568202 [2021-12-15 09:06:33,370 INFO L226 Difference]: Without dead ends: 264075 [2021-12-15 09:06:33,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 551 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:06:33,572 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 279 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:33,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 99 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:06:33,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264075 states. [2021-12-15 09:06:36,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264075 to 217651. [2021-12-15 09:06:37,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217651 states, 217650 states have (on average 1.0600597289225822) internal successors, (230722), 217650 states have internal predecessors, (230722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:37,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217651 states to 217651 states and 230722 transitions. [2021-12-15 09:06:37,362 INFO L78 Accepts]: Start accepts. Automaton has 217651 states and 230722 transitions. Word has length 552 [2021-12-15 09:06:37,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:37,362 INFO L470 AbstractCegarLoop]: Abstraction has 217651 states and 230722 transitions. [2021-12-15 09:06:37,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:37,363 INFO L276 IsEmpty]: Start isEmpty. Operand 217651 states and 230722 transitions. [2021-12-15 09:06:37,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2021-12-15 09:06:37,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:37,479 INFO L514 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:37,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-15 09:06:37,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:37,686 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:37,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:37,686 INFO L85 PathProgramCache]: Analyzing trace with hash -920924250, now seen corresponding path program 1 times [2021-12-15 09:06:37,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:37,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119647074] [2021-12-15 09:06:37,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:37,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 148 proven. 6 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-12-15 09:06:37,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:37,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119647074] [2021-12-15 09:06:37,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119647074] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:06:37,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442647035] [2021-12-15 09:06:37,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:37,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:37,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:37,813 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:06:38,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 09:06:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:38,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:06:38,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 729 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-15 09:06:39,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:39,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442647035] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:39,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:39,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:06:39,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579373700] [2021-12-15 09:06:39,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:39,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:39,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:39,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:39,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:39,204 INFO L87 Difference]: Start difference. First operand 217651 states and 230722 transitions. Second operand has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:40,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:40,876 INFO L93 Difference]: Finished difference Result 424750 states and 450313 transitions. [2021-12-15 09:06:40,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:40,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 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 559 [2021-12-15 09:06:40,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:41,180 INFO L225 Difference]: With dead ends: 424750 [2021-12-15 09:06:41,181 INFO L226 Difference]: Without dead ends: 207101 [2021-12-15 09:06:41,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:41,277 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 106 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:41,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 90 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:06:41,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207101 states.