./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label05.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/Problem13_label05.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 db95babf73fb1944c5f5cbb1a7fc98d0691e2dd292f8f012fa0cfbffe032486e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:44:19,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:44:19,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:44:19,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:44:19,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:44:19,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:44:19,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:44:19,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:44:19,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:44:19,386 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:44:19,387 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:44:19,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:44:19,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:44:19,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:44:19,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:44:19,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:44:19,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:44:19,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:44:19,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:44:19,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:44:19,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:44:19,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:44:19,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:44:19,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:44:19,418 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:44:19,418 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:44:19,418 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:44:19,419 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:44:19,419 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:44:19,420 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:44:19,420 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:44:19,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:44:19,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:44:19,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:44:19,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:44:19,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:44:19,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:44:19,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:44:19,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:44:19,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:44:19,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:44:19,440 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:44:19,454 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:44:19,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:44:19,457 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:44:19,457 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:44:19,458 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:44:19,458 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:44:19,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:44:19,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:44:19,459 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:44:19,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:44:19,460 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:44:19,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:44:19,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:44:19,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:44:19,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:44:19,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:44:19,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:44:19,461 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:44:19,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:44:19,461 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:44:19,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:44:19,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:44:19,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:44:19,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:44:19,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:44:19,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:44:19,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:44:19,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:44:19,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:44:19,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:44:19,464 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:44:19,464 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:44:19,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:44:19,464 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:44:19,464 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db95babf73fb1944c5f5cbb1a7fc98d0691e2dd292f8f012fa0cfbffe032486e [2021-12-15 22:44:19,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:44:19,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:44:19,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:44:19,678 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:44:19,678 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:44:19,679 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label05.c [2021-12-15 22:44:19,728 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/577934cb1/13e356f4de1d46e796b4d050bca1f7ca/FLAGbf8ddf566 [2021-12-15 22:44:20,363 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:44:20,364 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label05.c [2021-12-15 22:44:20,391 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/577934cb1/13e356f4de1d46e796b4d050bca1f7ca/FLAGbf8ddf566 [2021-12-15 22:44:20,513 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/577934cb1/13e356f4de1d46e796b4d050bca1f7ca [2021-12-15 22:44:20,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:44:20,518 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:44:20,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:44:20,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:44:20,525 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:44:20,526 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:44:20" (1/1) ... [2021-12-15 22:44:20,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e1992fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:20, skipping insertion in model container [2021-12-15 22:44:20,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:44:20" (1/1) ... [2021-12-15 22:44:20,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:44:20,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:44:20,910 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/Problem13_label05.c[6050,6063] [2021-12-15 22:44:21,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:44:21,495 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:44:21,518 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/Problem13_label05.c[6050,6063] [2021-12-15 22:44:21,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:44:21,855 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:44:21,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:21 WrapperNode [2021-12-15 22:44:21,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:44:21,856 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:44:21,857 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:44:21,857 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:44:21,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:21" (1/1) ... [2021-12-15 22:44:21,926 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:21" (1/1) ... [2021-12-15 22:44:22,325 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-15 22:44:22,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:44:22,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:44:22,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:44:22,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:44:22,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:21" (1/1) ... [2021-12-15 22:44:22,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:21" (1/1) ... [2021-12-15 22:44:22,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:21" (1/1) ... [2021-12-15 22:44:22,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:21" (1/1) ... [2021-12-15 22:44:22,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:21" (1/1) ... [2021-12-15 22:44:22,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:21" (1/1) ... [2021-12-15 22:44:22,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:21" (1/1) ... [2021-12-15 22:44:22,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:44:22,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:44:22,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:44:22,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:44:22,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:21" (1/1) ... [2021-12-15 22:44:22,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:44:22,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:44:22,912 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 22:44:22,975 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 22:44:23,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:44:23,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:44:23,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:44:23,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:44:23,126 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:44:23,127 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:44:26,955 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:44:26,975 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:44:26,975 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:44:26,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:44:26 BoogieIcfgContainer [2021-12-15 22:44:26,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:44:26,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:44:26,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:44:26,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:44:26,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:44:20" (1/3) ... [2021-12-15 22:44:26,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35a0b3f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:44:26, skipping insertion in model container [2021-12-15 22:44:26,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:21" (2/3) ... [2021-12-15 22:44:26,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35a0b3f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:44:26, skipping insertion in model container [2021-12-15 22:44:26,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:44:26" (3/3) ... [2021-12-15 22:44:26,986 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label05.c [2021-12-15 22:44:26,990 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:44:26,990 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:44:27,041 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:44:27,046 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 22:44:27,046 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:44:27,071 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states 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 22:44:27,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-15 22:44:27,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:27,077 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] [2021-12-15 22:44:27,077 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:27,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:27,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1824112922, now seen corresponding path program 1 times [2021-12-15 22:44:27,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:27,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857542469] [2021-12-15 22:44:27,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:27,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:27,284 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 22:44:27,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:27,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857542469] [2021-12-15 22:44:27,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857542469] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:27,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:44:27,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:44:27,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007524118] [2021-12-15 22:44:27,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:27,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:44:27,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:27,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:44:27,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:44:27,316 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 14.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 22:44:30,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:44:30,834 INFO L93 Difference]: Finished difference Result 3121 states and 5804 transitions. [2021-12-15 22:44:30,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:44:30,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-12-15 22:44:30,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:44:30,852 INFO L225 Difference]: With dead ends: 3121 [2021-12-15 22:44:30,853 INFO L226 Difference]: Without dead ends: 1944 [2021-12-15 22:44:30,858 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 22:44:30,860 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 947 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3124 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 3701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 3124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:44:30,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [947 Valid, 575 Invalid, 3701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 3124 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-15 22:44:30,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-12-15 22:44:30,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1873. [2021-12-15 22:44:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 1.7393162393162394) internal successors, (3256), 1872 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states 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 22:44:30,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3256 transitions. [2021-12-15 22:44:30,935 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3256 transitions. Word has length 42 [2021-12-15 22:44:30,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:44:30,936 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 3256 transitions. [2021-12-15 22:44:30,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 22:44:30,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3256 transitions. [2021-12-15 22:44:30,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-15 22:44:30,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:30,939 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:44:30,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:44:30,939 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:30,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:30,940 INFO L85 PathProgramCache]: Analyzing trace with hash -274088414, now seen corresponding path program 1 times [2021-12-15 22:44:30,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:30,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293700106] [2021-12-15 22:44:30,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:30,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:44:31,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:31,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293700106] [2021-12-15 22:44:31,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293700106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:31,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:44:31,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:44:31,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272371953] [2021-12-15 22:44:31,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:31,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:44:31,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:31,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:44:31,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:44:31,110 INFO L87 Difference]: Start difference. First operand 1873 states and 3256 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 22:44:35,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:44:35,960 INFO L93 Difference]: Finished difference Result 6152 states and 10700 transitions. [2021-12-15 22:44:35,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:44:35,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 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 107 [2021-12-15 22:44:35,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:44:35,977 INFO L225 Difference]: With dead ends: 6152 [2021-12-15 22:44:35,977 INFO L226 Difference]: Without dead ends: 4281 [2021-12-15 22:44:35,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:44:35,983 INFO L933 BasicCegarLoop]: 719 mSDtfsCounter, 2626 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 4125 mSolverCounterSat, 1299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2626 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 5424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1299 IncrementalHoareTripleChecker+Valid, 4125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:44:35,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2626 Valid, 1019 Invalid, 5424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1299 Valid, 4125 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-15 22:44:35,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2021-12-15 22:44:36,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 4280. [2021-12-15 22:44:36,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4280 states, 4279 states have (on average 1.4772143024071045) internal successors, (6321), 4279 states have internal predecessors, (6321), 0 states have call successors, (0), 0 states 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 22:44:36,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4280 states to 4280 states and 6321 transitions. [2021-12-15 22:44:36,067 INFO L78 Accepts]: Start accepts. Automaton has 4280 states and 6321 transitions. Word has length 107 [2021-12-15 22:44:36,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:44:36,069 INFO L470 AbstractCegarLoop]: Abstraction has 4280 states and 6321 transitions. [2021-12-15 22:44:36,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 22:44:36,070 INFO L276 IsEmpty]: Start isEmpty. Operand 4280 states and 6321 transitions. [2021-12-15 22:44:36,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-12-15 22:44:36,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:36,074 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 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 22:44:36,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:44:36,074 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:36,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:36,075 INFO L85 PathProgramCache]: Analyzing trace with hash -99161038, now seen corresponding path program 1 times [2021-12-15 22:44:36,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:36,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475629855] [2021-12-15 22:44:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:36,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:36,181 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 22:44:36,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:36,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475629855] [2021-12-15 22:44:36,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475629855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:36,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:44:36,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:44:36,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723872744] [2021-12-15 22:44:36,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:36,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:44:36,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:36,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:44:36,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:44:36,184 INFO L87 Difference]: Start difference. First operand 4280 states and 6321 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 22:44:39,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:44:39,283 INFO L93 Difference]: Finished difference Result 10953 states and 16960 transitions. [2021-12-15 22:44:39,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:44:39,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 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 209 [2021-12-15 22:44:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:44:39,306 INFO L225 Difference]: With dead ends: 10953 [2021-12-15 22:44:39,306 INFO L226 Difference]: Without dead ends: 7462 [2021-12-15 22:44:39,312 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 22:44:39,318 INFO L933 BasicCegarLoop]: 734 mSDtfsCounter, 940 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2534 mSolverCounterSat, 765 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 3299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 765 IncrementalHoareTripleChecker+Valid, 2534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:44:39,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 866 Invalid, 3299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [765 Valid, 2534 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 22:44:39,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7462 states. [2021-12-15 22:44:39,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7462 to 7455. [2021-12-15 22:44:39,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7455 states, 7454 states have (on average 1.3945532599946338) internal successors, (10395), 7454 states have internal predecessors, (10395), 0 states have call successors, (0), 0 states 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 22:44:39,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7455 states to 7455 states and 10395 transitions. [2021-12-15 22:44:39,429 INFO L78 Accepts]: Start accepts. Automaton has 7455 states and 10395 transitions. Word has length 209 [2021-12-15 22:44:39,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:44:39,430 INFO L470 AbstractCegarLoop]: Abstraction has 7455 states and 10395 transitions. [2021-12-15 22:44:39,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 22:44:39,431 INFO L276 IsEmpty]: Start isEmpty. Operand 7455 states and 10395 transitions. [2021-12-15 22:44:39,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-12-15 22:44:39,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:39,436 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 22:44:39,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:44:39,436 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:39,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:39,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1526135727, now seen corresponding path program 1 times [2021-12-15 22:44:39,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:39,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792099373] [2021-12-15 22:44:39,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:39,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-15 22:44:39,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:39,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792099373] [2021-12-15 22:44:39,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792099373] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:39,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:44:39,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:44:39,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517591128] [2021-12-15 22:44:39,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:39,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:44:39,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:39,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:44:39,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:44:39,588 INFO L87 Difference]: Start difference. First operand 7455 states and 10395 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 22:44:42,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:44:42,173 INFO L93 Difference]: Finished difference Result 20420 states and 29108 transitions. [2021-12-15 22:44:42,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:44:42,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 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 223 [2021-12-15 22:44:42,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:44:42,308 INFO L225 Difference]: With dead ends: 20420 [2021-12-15 22:44:42,308 INFO L226 Difference]: Without dead ends: 13754 [2021-12-15 22:44:42,314 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 22:44:42,335 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 886 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 3178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:44:42,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 988 Invalid, 3178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 22:44:42,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13754 states. [2021-12-15 22:44:42,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13754 to 12964. [2021-12-15 22:44:42,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12964 states, 12963 states have (on average 1.2915991668595233) internal successors, (16743), 12963 states have internal predecessors, (16743), 0 states have call successors, (0), 0 states 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 22:44:42,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12964 states to 12964 states and 16743 transitions. [2021-12-15 22:44:42,656 INFO L78 Accepts]: Start accepts. Automaton has 12964 states and 16743 transitions. Word has length 223 [2021-12-15 22:44:42,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:44:42,657 INFO L470 AbstractCegarLoop]: Abstraction has 12964 states and 16743 transitions. [2021-12-15 22:44:42,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 22:44:42,657 INFO L276 IsEmpty]: Start isEmpty. Operand 12964 states and 16743 transitions. [2021-12-15 22:44:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-15 22:44:42,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:42,660 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:44:42,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:44:42,660 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:42,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:42,662 INFO L85 PathProgramCache]: Analyzing trace with hash -851453726, now seen corresponding path program 1 times [2021-12-15 22:44:42,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:42,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20656179] [2021-12-15 22:44:42,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:42,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:44:42,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:42,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20656179] [2021-12-15 22:44:42,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20656179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:42,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:44:42,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:44:42,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960542258] [2021-12-15 22:44:42,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:42,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:44:42,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:42,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:44:42,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:44:42,762 INFO L87 Difference]: Start difference. First operand 12964 states and 16743 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states 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 22:44:45,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:44:45,706 INFO L93 Difference]: Finished difference Result 36960 states and 48179 transitions. [2021-12-15 22:44:45,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:44:45,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 241 [2021-12-15 22:44:45,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:44:45,756 INFO L225 Difference]: With dead ends: 36960 [2021-12-15 22:44:45,756 INFO L226 Difference]: Without dead ends: 24785 [2021-12-15 22:44:45,771 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 22:44:45,772 INFO L933 BasicCegarLoop]: 791 mSDtfsCounter, 859 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 3297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 920 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:44:45,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 907 Invalid, 3297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [920 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 22:44:45,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24785 states. [2021-12-15 22:44:46,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24785 to 24775. [2021-12-15 22:44:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24775 states, 24774 states have (on average 1.2223298619520464) internal successors, (30282), 24774 states have internal predecessors, (30282), 0 states have call successors, (0), 0 states 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 22:44:46,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24775 states to 24775 states and 30282 transitions. [2021-12-15 22:44:46,085 INFO L78 Accepts]: Start accepts. Automaton has 24775 states and 30282 transitions. Word has length 241 [2021-12-15 22:44:46,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:44:46,086 INFO L470 AbstractCegarLoop]: Abstraction has 24775 states and 30282 transitions. [2021-12-15 22:44:46,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states 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 22:44:46,089 INFO L276 IsEmpty]: Start isEmpty. Operand 24775 states and 30282 transitions. [2021-12-15 22:44:46,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-12-15 22:44:46,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:46,092 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, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:44:46,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:44:46,093 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:46,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:46,094 INFO L85 PathProgramCache]: Analyzing trace with hash 2028693862, now seen corresponding path program 1 times [2021-12-15 22:44:46,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:46,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128278014] [2021-12-15 22:44:46,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:46,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:46,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 315 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-15 22:44:46,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:46,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128278014] [2021-12-15 22:44:46,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128278014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:46,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:44:46,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:44:46,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931253716] [2021-12-15 22:44:46,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:46,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:44:46,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:46,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:44:46,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:44:46,198 INFO L87 Difference]: Start difference. First operand 24775 states and 30282 transitions. Second operand has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states 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 22:44:52,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:44:52,515 INFO L93 Difference]: Finished difference Result 74155 states and 91573 transitions. [2021-12-15 22:44:52,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:44:52,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 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 310 [2021-12-15 22:44:52,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:44:52,592 INFO L225 Difference]: With dead ends: 74155 [2021-12-15 22:44:52,592 INFO L226 Difference]: Without dead ends: 50169 [2021-12-15 22:44:52,623 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 22:44:52,623 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 1733 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 6694 mSolverCounterSat, 1120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1733 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 7814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1120 IncrementalHoareTripleChecker+Valid, 6694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:44:52,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1733 Valid, 739 Invalid, 7814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1120 Valid, 6694 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-12-15 22:44:52,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50169 states. [2021-12-15 22:44:53,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50169 to 48475. [2021-12-15 22:44:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48475 states, 48474 states have (on average 1.2085654165119446) internal successors, (58584), 48474 states have internal predecessors, (58584), 0 states have call successors, (0), 0 states 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 22:44:53,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48475 states to 48475 states and 58584 transitions. [2021-12-15 22:44:53,302 INFO L78 Accepts]: Start accepts. Automaton has 48475 states and 58584 transitions. Word has length 310 [2021-12-15 22:44:53,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:44:53,303 INFO L470 AbstractCegarLoop]: Abstraction has 48475 states and 58584 transitions. [2021-12-15 22:44:53,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states 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 22:44:53,303 INFO L276 IsEmpty]: Start isEmpty. Operand 48475 states and 58584 transitions. [2021-12-15 22:44:53,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-12-15 22:44:53,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:53,308 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, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 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 22:44:53,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:44:53,308 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:53,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:53,309 INFO L85 PathProgramCache]: Analyzing trace with hash -336757840, now seen corresponding path program 1 times [2021-12-15 22:44:53,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:53,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102523255] [2021-12-15 22:44:53,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:53,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:53,532 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 315 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-15 22:44:53,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:53,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102523255] [2021-12-15 22:44:53,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102523255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:53,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:44:53,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:44:53,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819187865] [2021-12-15 22:44:53,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:53,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:44:53,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:53,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:44:53,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:44:53,534 INFO L87 Difference]: Start difference. First operand 48475 states and 58584 transitions. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states 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 22:44:56,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:44:56,596 INFO L93 Difference]: Finished difference Result 117449 states and 140608 transitions. [2021-12-15 22:44:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:44:56,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 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 325 [2021-12-15 22:44:56,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:44:56,680 INFO L225 Difference]: With dead ends: 117449 [2021-12-15 22:44:56,680 INFO L226 Difference]: Without dead ends: 69763 [2021-12-15 22:44:56,823 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 22:44:56,824 INFO L933 BasicCegarLoop]: 1851 mSDtfsCounter, 755 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 1992 SdHoareTripleChecker+Invalid, 2908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:44:56,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 1992 Invalid, 2908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 2598 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 22:44:56,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69763 states. [2021-12-15 22:44:57,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69763 to 69728. [2021-12-15 22:44:57,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69728 states, 69727 states have (on average 1.171411361452522) internal successors, (81679), 69727 states have internal predecessors, (81679), 0 states have call successors, (0), 0 states 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 22:44:57,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69728 states to 69728 states and 81679 transitions. [2021-12-15 22:44:57,763 INFO L78 Accepts]: Start accepts. Automaton has 69728 states and 81679 transitions. Word has length 325 [2021-12-15 22:44:57,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:44:57,764 INFO L470 AbstractCegarLoop]: Abstraction has 69728 states and 81679 transitions. [2021-12-15 22:44:57,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states 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 22:44:57,779 INFO L276 IsEmpty]: Start isEmpty. Operand 69728 states and 81679 transitions. [2021-12-15 22:44:57,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2021-12-15 22:44:57,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:57,799 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, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:44:57,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:44:57,800 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:57,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:57,800 INFO L85 PathProgramCache]: Analyzing trace with hash 812269382, now seen corresponding path program 1 times [2021-12-15 22:44:57,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:57,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601595796] [2021-12-15 22:44:57,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:57,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:58,216 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 223 proven. 110 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-15 22:44:58,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:58,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601595796] [2021-12-15 22:44:58,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601595796] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:44:58,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380628923] [2021-12-15 22:44:58,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:58,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:44:58,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:44:58,219 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 22:44:58,221 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 22:44:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:58,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:44:58,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:44:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-15 22:44:58,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:44:58,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380628923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:58,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:44:58,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-15 22:44:58,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130421315] [2021-12-15 22:44:58,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:58,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:44:58,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:58,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:44:58,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-15 22:44:58,783 INFO L87 Difference]: Start difference. First operand 69728 states and 81679 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states 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 22:45:01,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:45:01,674 INFO L93 Difference]: Finished difference Result 138665 states and 162563 transitions. [2021-12-15 22:45:01,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:45:01,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 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 354 [2021-12-15 22:45:01,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:45:01,764 INFO L225 Difference]: With dead ends: 138665 [2021-12-15 22:45:01,764 INFO L226 Difference]: Without dead ends: 69726 [2021-12-15 22:45:01,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-15 22:45:01,802 INFO L933 BasicCegarLoop]: 1365 mSDtfsCounter, 1138 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2467 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 2918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:45:01,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1138 Valid, 1447 Invalid, 2918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2467 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:45:01,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69726 states. [2021-12-15 22:45:02,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69726 to 69725. [2021-12-15 22:45:02,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69725 states, 69724 states have (on average 1.1327806781022316) internal successors, (78982), 69724 states have internal predecessors, (78982), 0 states have call successors, (0), 0 states 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 22:45:02,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69725 states to 69725 states and 78982 transitions. [2021-12-15 22:45:02,715 INFO L78 Accepts]: Start accepts. Automaton has 69725 states and 78982 transitions. Word has length 354 [2021-12-15 22:45:02,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:45:02,715 INFO L470 AbstractCegarLoop]: Abstraction has 69725 states and 78982 transitions. [2021-12-15 22:45:02,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states 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 22:45:02,716 INFO L276 IsEmpty]: Start isEmpty. Operand 69725 states and 78982 transitions. [2021-12-15 22:45:02,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-12-15 22:45:02,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:45:02,721 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 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 22:45:02,741 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 22:45:02,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:45:02,938 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:45:02,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:45:02,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1537755998, now seen corresponding path program 1 times [2021-12-15 22:45:02,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:45:02,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939885289] [2021-12-15 22:45:02,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:45:02,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:45:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:45:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 358 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-15 22:45:03,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:45:03,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939885289] [2021-12-15 22:45:03,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939885289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:45:03,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:45:03,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:45:03,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187054614] [2021-12-15 22:45:03,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:45:03,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:45:03,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:45:03,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:45:03,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:45:03,257 INFO L87 Difference]: Start difference. First operand 69725 states and 78982 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 22:45:06,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:45:06,010 INFO L93 Difference]: Finished difference Result 142574 states and 161063 transitions. [2021-12-15 22:45:06,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:45:06,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 359 [2021-12-15 22:45:06,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:45:06,099 INFO L225 Difference]: With dead ends: 142574 [2021-12-15 22:45:06,099 INFO L226 Difference]: Without dead ends: 72062 [2021-12-15 22:45:06,117 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 22:45:06,120 INFO L933 BasicCegarLoop]: 1503 mSDtfsCounter, 1035 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 2941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:45:06,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1035 Valid, 1639 Invalid, 2941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:45:06,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72062 states. [2021-12-15 22:45:06,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72062 to 68120. [2021-12-15 22:45:06,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68120 states, 68119 states have (on average 1.0915163170334268) internal successors, (74353), 68119 states have internal predecessors, (74353), 0 states have call successors, (0), 0 states 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 22:45:06,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68120 states to 68120 states and 74353 transitions. [2021-12-15 22:45:06,958 INFO L78 Accepts]: Start accepts. Automaton has 68120 states and 74353 transitions. Word has length 359 [2021-12-15 22:45:06,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:45:06,958 INFO L470 AbstractCegarLoop]: Abstraction has 68120 states and 74353 transitions. [2021-12-15 22:45:06,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 22:45:06,980 INFO L276 IsEmpty]: Start isEmpty. Operand 68120 states and 74353 transitions. [2021-12-15 22:45:06,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-12-15 22:45:06,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:45:06,984 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:45:06,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 22:45:06,984 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:45:06,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:45:06,984 INFO L85 PathProgramCache]: Analyzing trace with hash 132051312, now seen corresponding path program 1 times [2021-12-15 22:45:06,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:45:06,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887041840] [2021-12-15 22:45:06,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:45:06,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:45:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:45:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-15 22:45:07,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:45:07,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887041840] [2021-12-15 22:45:07,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887041840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:45:07,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:45:07,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:45:07,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501744552] [2021-12-15 22:45:07,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:45:07,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:45:07,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:45:07,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:45:07,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:45:07,144 INFO L87 Difference]: Start difference. First operand 68120 states and 74353 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states 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 22:45:10,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:45:10,051 INFO L93 Difference]: Finished difference Result 138625 states and 151125 transitions. [2021-12-15 22:45:10,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:45:10,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 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 369 [2021-12-15 22:45:10,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:45:10,135 INFO L225 Difference]: With dead ends: 138625 [2021-12-15 22:45:10,135 INFO L226 Difference]: Without dead ends: 71294 [2021-12-15 22:45:10,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:45:10,181 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 836 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 2460 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 2837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 2460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:45:10,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [836 Valid, 1101 Invalid, 2837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 2460 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 22:45:10,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71294 states. [2021-12-15 22:45:10,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71294 to 67332. [2021-12-15 22:45:10,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67332 states, 67331 states have (on average 1.0818345190179857) internal successors, (72841), 67331 states have internal predecessors, (72841), 0 states have call successors, (0), 0 states 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 22:45:10,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67332 states to 67332 states and 72841 transitions. [2021-12-15 22:45:10,981 INFO L78 Accepts]: Start accepts. Automaton has 67332 states and 72841 transitions. Word has length 369 [2021-12-15 22:45:10,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:45:10,981 INFO L470 AbstractCegarLoop]: Abstraction has 67332 states and 72841 transitions. [2021-12-15 22:45:10,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states 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 22:45:10,982 INFO L276 IsEmpty]: Start isEmpty. Operand 67332 states and 72841 transitions. [2021-12-15 22:45:10,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2021-12-15 22:45:10,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:45:10,985 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:45:10,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 22:45:10,986 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:45:10,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:45:10,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1478414346, now seen corresponding path program 1 times [2021-12-15 22:45:10,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:45:10,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518605627] [2021-12-15 22:45:10,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:45:10,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:45:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:45:11,075 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-12-15 22:45:11,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:45:11,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518605627] [2021-12-15 22:45:11,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518605627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:45:11,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:45:11,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:45:11,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091781472] [2021-12-15 22:45:11,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:45:11,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:45:11,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:45:11,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:45:11,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:45:11,077 INFO L87 Difference]: Start difference. First operand 67332 states and 72841 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 22:45:14,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:45:14,860 INFO L93 Difference]: Finished difference Result 180347 states and 195876 transitions. [2021-12-15 22:45:14,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:45:14,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 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 371 [2021-12-15 22:45:14,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:45:15,005 INFO L225 Difference]: With dead ends: 180347 [2021-12-15 22:45:15,005 INFO L226 Difference]: Without dead ends: 113017 [2021-12-15 22:45:15,045 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 22:45:15,045 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 925 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2944 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 3465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 2944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:45:15,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [925 Valid, 771 Invalid, 3465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 2944 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-15 22:45:15,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113017 states. [2021-12-15 22:45:16,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113017 to 109857. [2021-12-15 22:45:16,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109857 states, 109856 states have (on average 1.0780021118555199) internal successors, (118425), 109856 states have internal predecessors, (118425), 0 states have call successors, (0), 0 states 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 22:45:16,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109857 states to 109857 states and 118425 transitions. [2021-12-15 22:45:16,412 INFO L78 Accepts]: Start accepts. Automaton has 109857 states and 118425 transitions. Word has length 371 [2021-12-15 22:45:16,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:45:16,413 INFO L470 AbstractCegarLoop]: Abstraction has 109857 states and 118425 transitions. [2021-12-15 22:45:16,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 22:45:16,413 INFO L276 IsEmpty]: Start isEmpty. Operand 109857 states and 118425 transitions. [2021-12-15 22:45:16,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2021-12-15 22:45:16,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:45:16,420 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:45:16,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 22:45:16,421 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:45:16,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:45:16,421 INFO L85 PathProgramCache]: Analyzing trace with hash 722646212, now seen corresponding path program 1 times [2021-12-15 22:45:16,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:45:16,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83837124] [2021-12-15 22:45:16,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:45:16,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:45:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:45:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 386 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-15 22:45:16,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:45:16,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83837124] [2021-12-15 22:45:16,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83837124] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:45:16,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:45:16,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:45:16,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887967334] [2021-12-15 22:45:16,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:45:16,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:45:16,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:45:16,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:45:16,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:45:16,529 INFO L87 Difference]: Start difference. First operand 109857 states and 118425 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 22:45:20,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:45:20,524 INFO L93 Difference]: Finished difference Result 255928 states and 278209 transitions. [2021-12-15 22:45:20,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:45:20,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 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 436 [2021-12-15 22:45:20,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:45:20,729 INFO L225 Difference]: With dead ends: 255928 [2021-12-15 22:45:20,730 INFO L226 Difference]: Without dead ends: 143712 [2021-12-15 22:45:20,811 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 22:45:20,812 INFO L933 BasicCegarLoop]: 1744 mSDtfsCounter, 786 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 2524 mSolverCounterSat, 714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 1889 SdHoareTripleChecker+Invalid, 3238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 714 IncrementalHoareTripleChecker+Valid, 2524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:45:20,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 1889 Invalid, 3238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [714 Valid, 2524 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-15 22:45:20,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143712 states. [2021-12-15 22:45:22,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143712 to 141335. [2021-12-15 22:45:22,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141335 states, 141334 states have (on average 1.067124683374135) internal successors, (150821), 141334 states have internal predecessors, (150821), 0 states have call successors, (0), 0 states 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 22:45:22,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141335 states to 141335 states and 150821 transitions. [2021-12-15 22:45:22,539 INFO L78 Accepts]: Start accepts. Automaton has 141335 states and 150821 transitions. Word has length 436 [2021-12-15 22:45:22,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:45:22,540 INFO L470 AbstractCegarLoop]: Abstraction has 141335 states and 150821 transitions. [2021-12-15 22:45:22,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 22:45:22,540 INFO L276 IsEmpty]: Start isEmpty. Operand 141335 states and 150821 transitions. [2021-12-15 22:45:22,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-12-15 22:45:22,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:45:22,555 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:45:22,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 22:45:22,556 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:45:22,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:45:22,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1491344447, now seen corresponding path program 1 times [2021-12-15 22:45:22,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:45:22,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552221159] [2021-12-15 22:45:22,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:45:22,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:45:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:45:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 320 proven. 110 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-15 22:45:22,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:45:22,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552221159] [2021-12-15 22:45:22,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552221159] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:45:22,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249899039] [2021-12-15 22:45:22,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:45:22,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:45:22,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:45:22,752 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 22:45:22,753 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 22:45:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:45:22,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:45:22,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:45:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-12-15 22:45:23,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:45:23,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249899039] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:45:23,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:45:23,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-15 22:45:23,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397410095] [2021-12-15 22:45:23,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:45:23,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:45:23,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:45:23,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:45:23,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-15 22:45:23,764 INFO L87 Difference]: Start difference. First operand 141335 states and 150821 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)