./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cd7d66127097bee693df60b26ad836789e8e18ef088953d4d01590e6c82035a4 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:37:56,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:37:56,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:37:56,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:37:56,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:37:56,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:37:56,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:37:56,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:37:56,256 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:37:56,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:37:56,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:37:56,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:37:56,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:37:56,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:37:56,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:37:56,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:37:56,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:37:56,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:37:56,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:37:56,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:37:56,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:37:56,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:37:56,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:37:56,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:37:56,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:37:56,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:37:56,289 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:37:56,289 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:37:56,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:37:56,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:37:56,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:37:56,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:37:56,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:37:56,295 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:37:56,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:37:56,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:37:56,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:37:56,297 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:37:56,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:37:56,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:37:56,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:37:56,299 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:37:56,331 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:37:56,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:37:56,336 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:37:56,337 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:37:56,338 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:37:56,338 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:37:56,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:37:56,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:37:56,339 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:37:56,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:37:56,340 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:37:56,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:37:56,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:37:56,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:37:56,340 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:37:56,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:37:56,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:37:56,341 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:37:56,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:37:56,341 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:37:56,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:37:56,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:37:56,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:37:56,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:37:56,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:37:56,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:37:56,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:37:56,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:37:56,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:37:56,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:37:56,343 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:37:56,344 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:37:56,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:37:56,344 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:37:56,344 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd7d66127097bee693df60b26ad836789e8e18ef088953d4d01590e6c82035a4 [2021-12-15 11:37:56,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:37:56,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:37:56,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:37:56,622 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:37:56,623 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:37:56,624 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-15 11:37:56,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66e1c26f1/b9b7999e627946568d1acf1569ee47d3/FLAG08519d4ae [2021-12-15 11:37:57,177 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:37:57,178 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-15 11:37:57,193 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66e1c26f1/b9b7999e627946568d1acf1569ee47d3/FLAG08519d4ae [2021-12-15 11:37:57,520 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66e1c26f1/b9b7999e627946568d1acf1569ee47d3 [2021-12-15 11:37:57,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:37:57,529 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:37:57,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:37:57,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:37:57,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:37:57,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:37:57" (1/1) ... [2021-12-15 11:37:57,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57ac8de7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:37:57, skipping insertion in model container [2021-12-15 11:37:57,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:37:57" (1/1) ... [2021-12-15 11:37:57,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:37:57,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:37:57,810 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7669,7682] [2021-12-15 11:37:57,841 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:37:57,854 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:37:57,898 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7669,7682] [2021-12-15 11:37:57,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:37:57,939 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:37:57,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:37:57 WrapperNode [2021-12-15 11:37:57,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:37:57,941 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:37:57,941 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:37:57,941 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:37:57,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:37:57" (1/1) ... [2021-12-15 11:37:57,966 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:37:57" (1/1) ... [2021-12-15 11:37:58,017 INFO L137 Inliner]: procedures = 27, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 573 [2021-12-15 11:37:58,018 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:37:58,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:37:58,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:37:58,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:37:58,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:37:57" (1/1) ... [2021-12-15 11:37:58,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:37:57" (1/1) ... [2021-12-15 11:37:58,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:37:57" (1/1) ... [2021-12-15 11:37:58,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:37:57" (1/1) ... [2021-12-15 11:37:58,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:37:57" (1/1) ... [2021-12-15 11:37:58,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:37:57" (1/1) ... [2021-12-15 11:37:58,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:37:57" (1/1) ... [2021-12-15 11:37:58,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:37:58,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:37:58,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:37:58,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:37:58,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:37:57" (1/1) ... [2021-12-15 11:37:58,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:37:58,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:37:58,121 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 11:37:58,141 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 11:37:58,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:37:58,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:37:58,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:37:58,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:37:58,287 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:37:58,288 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:37:58,657 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:37:58,664 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:37:58,664 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 11:37:58,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:37:58 BoogieIcfgContainer [2021-12-15 11:37:58,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:37:58,667 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:37:58,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:37:58,671 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:37:58,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:37:57" (1/3) ... [2021-12-15 11:37:58,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be329d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:37:58, skipping insertion in model container [2021-12-15 11:37:58,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:37:57" (2/3) ... [2021-12-15 11:37:58,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be329d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:37:58, skipping insertion in model container [2021-12-15 11:37:58,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:37:58" (3/3) ... [2021-12-15 11:37:58,676 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-15 11:37:58,690 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:37:58,691 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:37:58,735 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:37:58,741 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 11:37:58,741 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:37:58,756 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 136 states have (on average 1.7426470588235294) internal successors, (237), 137 states have internal predecessors, (237), 0 states have call successors, (0), 0 states 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 11:37:58,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-15 11:37:58,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:37:58,777 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:37:58,777 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:37:58,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:37:58,782 INFO L85 PathProgramCache]: Analyzing trace with hash -2006546999, now seen corresponding path program 1 times [2021-12-15 11:37:58,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:37:58,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107082289] [2021-12-15 11:37:58,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:37:58,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:37:58,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:37:59,144 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 11:37:59,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:37:59,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107082289] [2021-12-15 11:37:59,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107082289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:37:59,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:37:59,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:37:59,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396677119] [2021-12-15 11:37:59,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:37:59,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:37:59,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:37:59,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:37:59,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:37:59,182 INFO L87 Difference]: Start difference. First operand has 138 states, 136 states have (on average 1.7426470588235294) internal successors, (237), 137 states have internal predecessors, (237), 0 states have call successors, (0), 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 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 11:37:59,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:37:59,272 INFO L93 Difference]: Finished difference Result 300 states and 490 transitions. [2021-12-15 11:37:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:37:59,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2021-12-15 11:37:59,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:37:59,296 INFO L225 Difference]: With dead ends: 300 [2021-12-15 11:37:59,296 INFO L226 Difference]: Without dead ends: 209 [2021-12-15 11:37:59,300 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 11:37:59,305 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 159 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:37:59,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 471 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:37:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-15 11:37:59,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2021-12-15 11:37:59,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.4466019417475728) internal successors, (298), 206 states have internal predecessors, (298), 0 states have call successors, (0), 0 states 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 11:37:59,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 298 transitions. [2021-12-15 11:37:59,351 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 298 transitions. Word has length 87 [2021-12-15 11:37:59,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:37:59,351 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 298 transitions. [2021-12-15 11:37:59,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 11:37:59,352 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 298 transitions. [2021-12-15 11:37:59,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-15 11:37:59,354 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:37:59,354 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:37:59,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:37:59,355 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:37:59,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:37:59,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1559740613, now seen corresponding path program 1 times [2021-12-15 11:37:59,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:37:59,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211243678] [2021-12-15 11:37:59,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:37:59,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:37:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:37:59,504 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 11:37:59,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:37:59,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211243678] [2021-12-15 11:37:59,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211243678] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:37:59,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:37:59,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:37:59,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481383848] [2021-12-15 11:37:59,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:37:59,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:37:59,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:37:59,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:37:59,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:37:59,511 INFO L87 Difference]: Start difference. First operand 207 states and 298 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 11:37:59,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:37:59,579 INFO L93 Difference]: Finished difference Result 499 states and 762 transitions. [2021-12-15 11:37:59,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:37:59,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 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 88 [2021-12-15 11:37:59,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:37:59,585 INFO L225 Difference]: With dead ends: 499 [2021-12-15 11:37:59,586 INFO L226 Difference]: Without dead ends: 345 [2021-12-15 11:37:59,592 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 11:37:59,594 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 110 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:37:59,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 402 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:37:59,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-12-15 11:37:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 343. [2021-12-15 11:37:59,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 1.5029239766081872) internal successors, (514), 342 states have internal predecessors, (514), 0 states have call successors, (0), 0 states 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 11:37:59,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 514 transitions. [2021-12-15 11:37:59,666 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 514 transitions. Word has length 88 [2021-12-15 11:37:59,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:37:59,667 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 514 transitions. [2021-12-15 11:37:59,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 11:37:59,668 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 514 transitions. [2021-12-15 11:37:59,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-15 11:37:59,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:37:59,675 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:37:59,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 11:37:59,675 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:37:59,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:37:59,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1480148747, now seen corresponding path program 1 times [2021-12-15 11:37:59,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:37:59,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571404566] [2021-12-15 11:37:59,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:37:59,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:37:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:37:59,802 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 11:37:59,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:37:59,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571404566] [2021-12-15 11:37:59,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571404566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:37:59,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:37:59,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:37:59,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796549352] [2021-12-15 11:37:59,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:37:59,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:37:59,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:37:59,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:37:59,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:37:59,808 INFO L87 Difference]: Start difference. First operand 343 states and 514 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 11:37:59,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:37:59,869 INFO L93 Difference]: Finished difference Result 891 states and 1384 transitions. [2021-12-15 11:37:59,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:37:59,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2021-12-15 11:37:59,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:37:59,875 INFO L225 Difference]: With dead ends: 891 [2021-12-15 11:37:59,875 INFO L226 Difference]: Without dead ends: 601 [2021-12-15 11:37:59,878 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 11:37:59,884 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 105 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:37:59,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 398 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:37:59,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-12-15 11:37:59,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 599. [2021-12-15 11:37:59,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 1.5351170568561874) internal successors, (918), 598 states have internal predecessors, (918), 0 states have call successors, (0), 0 states 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 11:37:59,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 918 transitions. [2021-12-15 11:37:59,941 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 918 transitions. Word has length 89 [2021-12-15 11:37:59,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:37:59,943 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 918 transitions. [2021-12-15 11:37:59,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 11:37:59,943 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 918 transitions. [2021-12-15 11:37:59,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-15 11:37:59,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:37:59,949 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:37:59,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 11:37:59,950 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:37:59,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:37:59,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1142089047, now seen corresponding path program 1 times [2021-12-15 11:37:59,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:37:59,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039516824] [2021-12-15 11:37:59,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:37:59,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:37:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:38:00,063 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 11:38:00,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:38:00,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039516824] [2021-12-15 11:38:00,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039516824] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:38:00,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:38:00,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:38:00,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8295245] [2021-12-15 11:38:00,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:38:00,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:38:00,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:38:00,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:38:00,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:38:00,067 INFO L87 Difference]: Start difference. First operand 599 states and 918 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 11:38:00,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:38:00,117 INFO L93 Difference]: Finished difference Result 1627 states and 2544 transitions. [2021-12-15 11:38:00,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:38:00,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-15 11:38:00,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:38:00,127 INFO L225 Difference]: With dead ends: 1627 [2021-12-15 11:38:00,127 INFO L226 Difference]: Without dead ends: 1081 [2021-12-15 11:38:00,129 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 11:38:00,135 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 100 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:38:00,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 394 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:38:00,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-12-15 11:38:00,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 1079. [2021-12-15 11:38:00,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 1.549165120593692) internal successors, (1670), 1078 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states 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 11:38:00,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1670 transitions. [2021-12-15 11:38:00,202 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1670 transitions. Word has length 90 [2021-12-15 11:38:00,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:38:00,203 INFO L470 AbstractCegarLoop]: Abstraction has 1079 states and 1670 transitions. [2021-12-15 11:38:00,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 11:38:00,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1670 transitions. [2021-12-15 11:38:00,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-15 11:38:00,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:38:00,207 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:38:00,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 11:38:00,207 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:38:00,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:38:00,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1309607801, now seen corresponding path program 1 times [2021-12-15 11:38:00,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:38:00,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293851578] [2021-12-15 11:38:00,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:38:00,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:38:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:38:00,297 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 11:38:00,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:38:00,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293851578] [2021-12-15 11:38:00,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293851578] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:38:00,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:38:00,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:38:00,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782013382] [2021-12-15 11:38:00,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:38:00,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:38:00,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:38:00,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:38:00,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:38:00,301 INFO L87 Difference]: Start difference. First operand 1079 states and 1670 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 11:38:00,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:38:00,379 INFO L93 Difference]: Finished difference Result 3003 states and 4696 transitions. [2021-12-15 11:38:00,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:38:00,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-15 11:38:00,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:38:00,388 INFO L225 Difference]: With dead ends: 3003 [2021-12-15 11:38:00,388 INFO L226 Difference]: Without dead ends: 1977 [2021-12-15 11:38:00,391 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 11:38:00,391 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 95 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:38:00,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 390 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:38:00,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2021-12-15 11:38:00,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1975. [2021-12-15 11:38:00,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1974 states have (on average 1.5511651469098278) internal successors, (3062), 1974 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states 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 11:38:00,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 3062 transitions. [2021-12-15 11:38:00,485 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 3062 transitions. Word has length 91 [2021-12-15 11:38:00,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:38:00,486 INFO L470 AbstractCegarLoop]: Abstraction has 1975 states and 3062 transitions. [2021-12-15 11:38:00,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 11:38:00,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 3062 transitions. [2021-12-15 11:38:00,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-15 11:38:00,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:38:00,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:38:00,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 11:38:00,491 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:38:00,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:38:00,492 INFO L85 PathProgramCache]: Analyzing trace with hash 582949359, now seen corresponding path program 1 times [2021-12-15 11:38:00,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:38:00,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415555647] [2021-12-15 11:38:00,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:38:00,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:38:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:38:00,594 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 11:38:00,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:38:00,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415555647] [2021-12-15 11:38:00,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415555647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:38:00,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:38:00,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:38:00,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336474423] [2021-12-15 11:38:00,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:38:00,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:38:00,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:38:00,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:38:00,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:38:00,598 INFO L87 Difference]: Start difference. First operand 1975 states and 3062 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 11:38:00,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:38:00,727 INFO L93 Difference]: Finished difference Result 5563 states and 8664 transitions. [2021-12-15 11:38:00,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:38:00,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 92 [2021-12-15 11:38:00,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:38:00,743 INFO L225 Difference]: With dead ends: 5563 [2021-12-15 11:38:00,743 INFO L226 Difference]: Without dead ends: 3641 [2021-12-15 11:38:00,747 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 11:38:00,749 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 90 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:38:00,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 386 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:38:00,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3641 states. [2021-12-15 11:38:00,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3641 to 3639. [2021-12-15 11:38:00,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3639 states, 3638 states have (on average 1.5453545904343045) internal successors, (5622), 3638 states have internal predecessors, (5622), 0 states have call successors, (0), 0 states 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 11:38:00,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 5622 transitions. [2021-12-15 11:38:00,911 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 5622 transitions. Word has length 92 [2021-12-15 11:38:00,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:38:00,920 INFO L470 AbstractCegarLoop]: Abstraction has 3639 states and 5622 transitions. [2021-12-15 11:38:00,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 11:38:00,920 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 5622 transitions. [2021-12-15 11:38:00,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-15 11:38:00,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:38:00,921 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:38:00,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 11:38:00,922 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:38:00,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:38:00,922 INFO L85 PathProgramCache]: Analyzing trace with hash -496500112, now seen corresponding path program 1 times [2021-12-15 11:38:00,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:38:00,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950283370] [2021-12-15 11:38:00,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:38:00,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:38:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:38:01,047 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 11:38:01,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:38:01,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950283370] [2021-12-15 11:38:01,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950283370] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:38:01,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:38:01,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-15 11:38:01,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517758490] [2021-12-15 11:38:01,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:38:01,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 11:38:01,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:38:01,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 11:38:01,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-15 11:38:01,050 INFO L87 Difference]: Start difference. First operand 3639 states and 5622 transitions. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 11:38:03,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:38:03,363 INFO L93 Difference]: Finished difference Result 53843 states and 83588 transitions. [2021-12-15 11:38:03,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-15 11:38:03,367 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-15 11:38:03,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:38:03,587 INFO L225 Difference]: With dead ends: 53843 [2021-12-15 11:38:03,588 INFO L226 Difference]: Without dead ends: 50257 [2021-12-15 11:38:03,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-12-15 11:38:03,625 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 2518 mSDsluCounter, 4862 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2518 SdHoareTripleChecker+Valid, 5041 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 11:38:03,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2518 Valid, 5041 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 11:38:03,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50257 states. [2021-12-15 11:38:04,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50257 to 7223. [2021-12-15 11:38:04,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7223 states, 7222 states have (on average 1.5317086679590142) internal successors, (11062), 7222 states have internal predecessors, (11062), 0 states have call successors, (0), 0 states 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 11:38:04,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7223 states to 7223 states and 11062 transitions. [2021-12-15 11:38:04,652 INFO L78 Accepts]: Start accepts. Automaton has 7223 states and 11062 transitions. Word has length 93 [2021-12-15 11:38:04,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:38:04,653 INFO L470 AbstractCegarLoop]: Abstraction has 7223 states and 11062 transitions. [2021-12-15 11:38:04,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 11:38:04,653 INFO L276 IsEmpty]: Start isEmpty. Operand 7223 states and 11062 transitions. [2021-12-15 11:38:04,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-15 11:38:04,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:38:04,654 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:38:04,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 11:38:04,655 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:38:04,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:38:04,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1317055956, now seen corresponding path program 1 times [2021-12-15 11:38:04,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:38:04,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169122556] [2021-12-15 11:38:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:38:04,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:38:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:38:04,712 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 11:38:04,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:38:04,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169122556] [2021-12-15 11:38:04,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169122556] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:38:04,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:38:04,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:38:04,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781331721] [2021-12-15 11:38:04,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:38:04,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:38:04,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:38:04,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:38:04,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:38:04,715 INFO L87 Difference]: Start difference. First operand 7223 states and 11062 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:38:05,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:38:05,532 INFO L93 Difference]: Finished difference Result 20859 states and 31864 transitions. [2021-12-15 11:38:05,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:38:05,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-15 11:38:05,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:38:05,568 INFO L225 Difference]: With dead ends: 20859 [2021-12-15 11:38:05,568 INFO L226 Difference]: Without dead ends: 13689 [2021-12-15 11:38:05,581 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 11:38:05,583 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 80 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:38:05,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 304 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:38:05,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13689 states. [2021-12-15 11:38:06,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13689 to 13559. [2021-12-15 11:38:06,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13559 states, 13558 states have (on average 1.5050892462015046) internal successors, (20406), 13558 states have internal predecessors, (20406), 0 states have call successors, (0), 0 states 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 11:38:06,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13559 states to 13559 states and 20406 transitions. [2021-12-15 11:38:06,509 INFO L78 Accepts]: Start accepts. Automaton has 13559 states and 20406 transitions. Word has length 95 [2021-12-15 11:38:06,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:38:06,510 INFO L470 AbstractCegarLoop]: Abstraction has 13559 states and 20406 transitions. [2021-12-15 11:38:06,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:38:06,510 INFO L276 IsEmpty]: Start isEmpty. Operand 13559 states and 20406 transitions. [2021-12-15 11:38:06,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-15 11:38:06,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:38:06,512 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:38:06,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 11:38:06,512 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:38:06,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:38:06,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1296053301, now seen corresponding path program 1 times [2021-12-15 11:38:06,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:38:06,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416446075] [2021-12-15 11:38:06,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:38:06,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:38:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:38:06,808 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 11:38:06,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:38:06,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416446075] [2021-12-15 11:38:06,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416446075] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:38:06,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:38:06,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-15 11:38:06,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576139515] [2021-12-15 11:38:06,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:38:06,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 11:38:06,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:38:06,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 11:38:06,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-15 11:38:06,812 INFO L87 Difference]: Start difference. First operand 13559 states and 20406 transitions. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:38:07,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:38:07,882 INFO L93 Difference]: Finished difference Result 27067 states and 40760 transitions. [2021-12-15 11:38:07,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 11:38:07,882 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-15 11:38:07,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:38:07,923 INFO L225 Difference]: With dead ends: 27067 [2021-12-15 11:38:07,924 INFO L226 Difference]: Without dead ends: 13561 [2021-12-15 11:38:07,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-12-15 11:38:07,950 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 848 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:38:07,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 989 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:38:07,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13561 states. [2021-12-15 11:38:08,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13561 to 13559. [2021-12-15 11:38:08,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13559 states, 13558 states have (on average 1.495648325711757) internal successors, (20278), 13558 states have internal predecessors, (20278), 0 states have call successors, (0), 0 states 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 11:38:08,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13559 states to 13559 states and 20278 transitions. [2021-12-15 11:38:08,589 INFO L78 Accepts]: Start accepts. Automaton has 13559 states and 20278 transitions. Word has length 95 [2021-12-15 11:38:08,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:38:08,589 INFO L470 AbstractCegarLoop]: Abstraction has 13559 states and 20278 transitions. [2021-12-15 11:38:08,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:38:08,590 INFO L276 IsEmpty]: Start isEmpty. Operand 13559 states and 20278 transitions. [2021-12-15 11:38:08,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-15 11:38:08,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:38:08,591 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:38:08,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 11:38:08,591 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:38:08,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:38:08,592 INFO L85 PathProgramCache]: Analyzing trace with hash 232587604, now seen corresponding path program 1 times [2021-12-15 11:38:08,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:38:08,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762592704] [2021-12-15 11:38:08,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:38:08,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:38:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:38:08,640 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 11:38:08,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:38:08,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762592704] [2021-12-15 11:38:08,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762592704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:38:08,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:38:08,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:38:08,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331907187] [2021-12-15 11:38:08,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:38:08,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:38:08,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:38:08,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:38:08,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:38:08,643 INFO L87 Difference]: Start difference. First operand 13559 states and 20278 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:38:09,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:38:09,529 INFO L93 Difference]: Finished difference Result 26622 states and 40124 transitions. [2021-12-15 11:38:09,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:38:09,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-15 11:38:09,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:38:09,581 INFO L225 Difference]: With dead ends: 26622 [2021-12-15 11:38:09,581 INFO L226 Difference]: Without dead ends: 19451 [2021-12-15 11:38:09,601 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 11:38:09,602 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 117 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:38:09,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 414 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:38:09,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19451 states. [2021-12-15 11:38:10,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19451 to 19449. [2021-12-15 11:38:10,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19449 states, 19448 states have (on average 1.4936240230357878) internal successors, (29048), 19448 states have internal predecessors, (29048), 0 states have call successors, (0), 0 states 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 11:38:10,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19449 states to 19449 states and 29048 transitions. [2021-12-15 11:38:10,785 INFO L78 Accepts]: Start accepts. Automaton has 19449 states and 29048 transitions. Word has length 96 [2021-12-15 11:38:10,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:38:10,785 INFO L470 AbstractCegarLoop]: Abstraction has 19449 states and 29048 transitions. [2021-12-15 11:38:10,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:38:10,785 INFO L276 IsEmpty]: Start isEmpty. Operand 19449 states and 29048 transitions. [2021-12-15 11:38:10,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-15 11:38:10,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:38:10,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:38:10,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 11:38:10,787 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:38:10,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:38:10,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1524855936, now seen corresponding path program 1 times [2021-12-15 11:38:10,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:38:10,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957321689] [2021-12-15 11:38:10,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:38:10,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:38:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:38:10,865 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 11:38:10,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:38:10,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957321689] [2021-12-15 11:38:10,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957321689] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:38:10,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:38:10,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:38:10,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875420869] [2021-12-15 11:38:10,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:38:10,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:38:10,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:38:10,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:38:10,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:38:10,868 INFO L87 Difference]: Start difference. First operand 19449 states and 29048 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:38:11,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:38:11,805 INFO L93 Difference]: Finished difference Result 38843 states and 58041 transitions. [2021-12-15 11:38:11,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:38:11,806 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-15 11:38:11,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:38:11,850 INFO L225 Difference]: With dead ends: 38843 [2021-12-15 11:38:11,850 INFO L226 Difference]: Without dead ends: 19449 [2021-12-15 11:38:11,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:38:11,884 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 441 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:38:11,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 142 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:38:11,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19449 states. [2021-12-15 11:38:12,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19449 to 19449. [2021-12-15 11:38:12,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19449 states, 19448 states have (on average 1.483751542575072) internal successors, (28856), 19448 states have internal predecessors, (28856), 0 states have call successors, (0), 0 states 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 11:38:12,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19449 states to 19449 states and 28856 transitions. [2021-12-15 11:38:12,990 INFO L78 Accepts]: Start accepts. Automaton has 19449 states and 28856 transitions. Word has length 96 [2021-12-15 11:38:12,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:38:12,990 INFO L470 AbstractCegarLoop]: Abstraction has 19449 states and 28856 transitions. [2021-12-15 11:38:12,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:38:12,991 INFO L276 IsEmpty]: Start isEmpty. Operand 19449 states and 28856 transitions. [2021-12-15 11:38:12,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-15 11:38:12,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:38:12,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:38:12,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 11:38:12,992 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:38:12,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:38:12,993 INFO L85 PathProgramCache]: Analyzing trace with hash 2007247653, now seen corresponding path program 1 times [2021-12-15 11:38:12,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:38:12,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966688775] [2021-12-15 11:38:12,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:38:12,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:38:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:38:13,049 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 11:38:13,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:38:13,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966688775] [2021-12-15 11:38:13,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966688775] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:38:13,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:38:13,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:38:13,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822393310] [2021-12-15 11:38:13,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:38:13,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:38:13,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:38:13,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:38:13,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:38:13,052 INFO L87 Difference]: Start difference. First operand 19449 states and 28856 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:38:14,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:38:14,616 INFO L93 Difference]: Finished difference Result 51901 states and 77242 transitions. [2021-12-15 11:38:14,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:38:14,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-15 11:38:14,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:38:14,680 INFO L225 Difference]: With dead ends: 51901 [2021-12-15 11:38:14,681 INFO L226 Difference]: Without dead ends: 32507 [2021-12-15 11:38:14,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:38:14,712 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 732 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:38:14,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [732 Valid, 187 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:38:14,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32507 states. [2021-12-15 11:38:16,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32507 to 32505. [2021-12-15 11:38:16,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32505 states, 32504 states have (on average 1.4824021658872755) internal successors, (48184), 32504 states have internal predecessors, (48184), 0 states have call successors, (0), 0 states 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 11:38:16,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32505 states to 32505 states and 48184 transitions. [2021-12-15 11:38:16,710 INFO L78 Accepts]: Start accepts. Automaton has 32505 states and 48184 transitions. Word has length 96 [2021-12-15 11:38:16,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:38:16,710 INFO L470 AbstractCegarLoop]: Abstraction has 32505 states and 48184 transitions. [2021-12-15 11:38:16,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:38:16,711 INFO L276 IsEmpty]: Start isEmpty. Operand 32505 states and 48184 transitions. [2021-12-15 11:38:16,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-15 11:38:16,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:38:16,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:38:16,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 11:38:16,712 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:38:16,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:38:16,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1645128928, now seen corresponding path program 1 times [2021-12-15 11:38:16,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:38:16,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962580899] [2021-12-15 11:38:16,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:38:16,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:38:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:38:16,783 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 11:38:16,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:38:16,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962580899] [2021-12-15 11:38:16,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962580899] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:38:16,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:38:16,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:38:16,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924177092] [2021-12-15 11:38:16,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:38:16,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:38:16,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:38:16,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:38:16,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:38:16,786 INFO L87 Difference]: Start difference. First operand 32505 states and 48184 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:38:18,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:38:18,492 INFO L93 Difference]: Finished difference Result 64955 states and 96313 transitions. [2021-12-15 11:38:18,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:38:18,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-15 11:38:18,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:38:18,546 INFO L225 Difference]: With dead ends: 64955 [2021-12-15 11:38:18,546 INFO L226 Difference]: Without dead ends: 32505 [2021-12-15 11:38:18,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:38:18,582 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 412 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:38:18,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 158 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:38:18,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32505 states. [2021-12-15 11:38:20,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32505 to 32505. [2021-12-15 11:38:20,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32505 states, 32504 states have (on average 1.4725572237263107) internal successors, (47864), 32504 states have internal predecessors, (47864), 0 states have call successors, (0), 0 states 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 11:38:20,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32505 states to 32505 states and 47864 transitions. [2021-12-15 11:38:20,571 INFO L78 Accepts]: Start accepts. Automaton has 32505 states and 47864 transitions. Word has length 96 [2021-12-15 11:38:20,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:38:20,571 INFO L470 AbstractCegarLoop]: Abstraction has 32505 states and 47864 transitions. [2021-12-15 11:38:20,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:38:20,572 INFO L276 IsEmpty]: Start isEmpty. Operand 32505 states and 47864 transitions. [2021-12-15 11:38:20,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-15 11:38:20,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:38:20,573 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:38:20,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 11:38:20,573 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:38:20,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:38:20,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1784305979, now seen corresponding path program 1 times [2021-12-15 11:38:20,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:38:20,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284998978] [2021-12-15 11:38:20,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:38:20,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:38:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:38:20,630 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 11:38:20,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:38:20,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284998978] [2021-12-15 11:38:20,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284998978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:38:20,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:38:20,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:38:20,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279697121] [2021-12-15 11:38:20,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:38:20,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:38:20,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:38:20,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:38:20,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:38:20,633 INFO L87 Difference]: Start difference. First operand 32505 states and 47864 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:38:22,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:38:22,307 INFO L93 Difference]: Finished difference Result 64955 states and 95673 transitions. [2021-12-15 11:38:22,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:38:22,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-15 11:38:22,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:38:22,358 INFO L225 Difference]: With dead ends: 64955 [2021-12-15 11:38:22,358 INFO L226 Difference]: Without dead ends: 32505 [2021-12-15 11:38:22,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:38:22,393 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 396 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:38:22,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 166 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:38:22,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32505 states. [2021-12-15 11:38:24,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32505 to 32505. [2021-12-15 11:38:24,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32505 states, 32504 states have (on average 1.4627122815653457) internal successors, (47544), 32504 states have internal predecessors, (47544), 0 states have call successors, (0), 0 states 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 11:38:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32505 states to 32505 states and 47544 transitions. [2021-12-15 11:38:24,447 INFO L78 Accepts]: Start accepts. Automaton has 32505 states and 47544 transitions. Word has length 96 [2021-12-15 11:38:24,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:38:24,448 INFO L470 AbstractCegarLoop]: Abstraction has 32505 states and 47544 transitions. [2021-12-15 11:38:24,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:38:24,448 INFO L276 IsEmpty]: Start isEmpty. Operand 32505 states and 47544 transitions. [2021-12-15 11:38:24,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-15 11:38:24,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:38:24,449 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:38:24,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 11:38:24,449 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:38:24,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:38:24,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1981370816, now seen corresponding path program 1 times [2021-12-15 11:38:24,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:38:24,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516885478] [2021-12-15 11:38:24,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:38:24,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:38:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:38:24,501 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 11:38:24,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:38:24,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516885478] [2021-12-15 11:38:24,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516885478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:38:24,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:38:24,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:38:24,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936546181] [2021-12-15 11:38:24,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:38:24,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:38:24,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:38:24,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:38:24,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:38:24,504 INFO L87 Difference]: Start difference. First operand 32505 states and 47544 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:38:26,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:38:26,509 INFO L93 Difference]: Finished difference Result 64955 states and 95033 transitions. [2021-12-15 11:38:26,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:38:26,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-15 11:38:26,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:38:26,565 INFO L225 Difference]: With dead ends: 64955 [2021-12-15 11:38:26,565 INFO L226 Difference]: Without dead ends: 32505 [2021-12-15 11:38:26,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:38:26,605 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 458 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:38:26,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 126 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:38:26,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32505 states. [2021-12-15 11:38:28,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32505 to 32505. [2021-12-15 11:38:28,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32505 states, 32504 states have (on average 1.452867339404381) internal successors, (47224), 32504 states have internal predecessors, (47224), 0 states have call successors, (0), 0 states 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 11:38:28,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32505 states to 32505 states and 47224 transitions. [2021-12-15 11:38:28,694 INFO L78 Accepts]: Start accepts. Automaton has 32505 states and 47224 transitions. Word has length 96 [2021-12-15 11:38:28,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:38:28,695 INFO L470 AbstractCegarLoop]: Abstraction has 32505 states and 47224 transitions. [2021-12-15 11:38:28,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:38:28,695 INFO L276 IsEmpty]: Start isEmpty. Operand 32505 states and 47224 transitions. [2021-12-15 11:38:28,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-15 11:38:28,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:38:28,696 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:38:28,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 11:38:28,696 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:38:28,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:38:28,697 INFO L85 PathProgramCache]: Analyzing trace with hash 239953701, now seen corresponding path program 1 times [2021-12-15 11:38:28,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:38:28,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100745352] [2021-12-15 11:38:28,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:38:28,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:38:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:38:28,771 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 11:38:28,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:38:28,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100745352] [2021-12-15 11:38:28,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100745352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:38:28,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:38:28,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:38:28,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175820127] [2021-12-15 11:38:28,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:38:28,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:38:28,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:38:28,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:38:28,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:38:28,776 INFO L87 Difference]: Start difference. First operand 32505 states and 47224 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:38:32,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:38:32,372 INFO L93 Difference]: Finished difference Result 61741 states and 89443 transitions. [2021-12-15 11:38:32,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:38:32,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-15 11:38:32,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:38:32,460 INFO L225 Difference]: With dead ends: 61741 [2021-12-15 11:38:32,460 INFO L226 Difference]: Without dead ends: 61739 [2021-12-15 11:38:32,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:38:32,475 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 236 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:38:32,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 815 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:38:32,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61739 states. [2021-12-15 11:38:34,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61739 to 33529. [2021-12-15 11:38:34,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33529 states, 33528 states have (on average 1.4371271772846577) internal successors, (48184), 33528 states have internal predecessors, (48184), 0 states have call successors, (0), 0 states 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 11:38:34,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33529 states to 33529 states and 48184 transitions. [2021-12-15 11:38:34,798 INFO L78 Accepts]: Start accepts. Automaton has 33529 states and 48184 transitions. Word has length 96 [2021-12-15 11:38:34,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:38:34,798 INFO L470 AbstractCegarLoop]: Abstraction has 33529 states and 48184 transitions. [2021-12-15 11:38:34,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:38:34,799 INFO L276 IsEmpty]: Start isEmpty. Operand 33529 states and 48184 transitions. [2021-12-15 11:38:34,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-15 11:38:34,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:38:34,809 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:38:34,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 11:38:34,809 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:38:34,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:38:34,810 INFO L85 PathProgramCache]: Analyzing trace with hash -714656545, now seen corresponding path program 1 times [2021-12-15 11:38:34,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:38:34,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021556516] [2021-12-15 11:38:34,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:38:34,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:38:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:38:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 11:38:34,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:38:34,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021556516] [2021-12-15 11:38:34,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021556516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:38:34,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:38:34,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-15 11:38:34,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596151176] [2021-12-15 11:38:34,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:38:34,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 11:38:34,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:38:34,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 11:38:34,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-15 11:38:34,927 INFO L87 Difference]: Start difference. First operand 33529 states and 48184 transitions. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)