./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/pals_lcr.6.1.ufo.UNBOUNDED.pals.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 e7078db7101404701d1361cc736476696e00d8cbe0085be82e13ec1c6956c8c2 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:30:36,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:30:36,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:30:36,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:30:36,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:30:36,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:30:36,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:30:36,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:30:36,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:30:36,386 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:30:36,387 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:30:36,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:30:36,390 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:30:36,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:30:36,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:30:36,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:30:36,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:30:36,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:30:36,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:30:36,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:30:36,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:30:36,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:30:36,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:30:36,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:30:36,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:30:36,417 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:30:36,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:30:36,418 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:30:36,419 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:30:36,420 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:30:36,420 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:30:36,421 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:30:36,422 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:30:36,423 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:30:36,424 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:30:36,424 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:30:36,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:30:36,425 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:30:36,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:30:36,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:30:36,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:30:36,428 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:30:36,456 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:30:36,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:30:36,457 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:30:36,457 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:30:36,458 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:30:36,458 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:30:36,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:30:36,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:30:36,459 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:30:36,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:30:36,460 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:30:36,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:30:36,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:30:36,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:30:36,461 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:30:36,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:30:36,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:30:36,462 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:30:36,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:30:36,462 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:30:36,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:30:36,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:30:36,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:30:36,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:30:36,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:30:36,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:30:36,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:30:36,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:30:36,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:30:36,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:30:36,464 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:30:36,464 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:30:36,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:30:36,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:30:36,465 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7078db7101404701d1361cc736476696e00d8cbe0085be82e13ec1c6956c8c2 [2021-12-21 13:30:36,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:30:36,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:30:36,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:30:36,721 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:30:36,722 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:30:36,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c [2021-12-21 13:30:36,788 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e701ba23/95d92fefc1b54076b576695a89567412/FLAGc4d3bb178 [2021-12-21 13:30:37,217 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:30:37,217 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c [2021-12-21 13:30:37,237 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e701ba23/95d92fefc1b54076b576695a89567412/FLAGc4d3bb178 [2021-12-21 13:30:37,746 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e701ba23/95d92fefc1b54076b576695a89567412 [2021-12-21 13:30:37,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:30:37,749 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:30:37,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:30:37,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:30:37,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:30:37,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:30:37" (1/1) ... [2021-12-21 13:30:37,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d45231a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:37, skipping insertion in model container [2021-12-21 13:30:37,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:30:37" (1/1) ... [2021-12-21 13:30:37,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:30:37,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:30:37,994 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/pals_lcr.6.1.ufo.UNBOUNDED.pals.c[15140,15153] [2021-12-21 13:30:37,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:30:38,005 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:30:38,063 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/pals_lcr.6.1.ufo.UNBOUNDED.pals.c[15140,15153] [2021-12-21 13:30:38,064 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:30:38,075 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:30:38,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:38 WrapperNode [2021-12-21 13:30:38,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:30:38,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:30:38,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:30:38,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:30:38,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:38" (1/1) ... [2021-12-21 13:30:38,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:38" (1/1) ... [2021-12-21 13:30:38,120 INFO L137 Inliner]: procedures = 26, calls = 17, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 391 [2021-12-21 13:30:38,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:30:38,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:30:38,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:30:38,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:30:38,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:38" (1/1) ... [2021-12-21 13:30:38,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:38" (1/1) ... [2021-12-21 13:30:38,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:38" (1/1) ... [2021-12-21 13:30:38,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:38" (1/1) ... [2021-12-21 13:30:38,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:38" (1/1) ... [2021-12-21 13:30:38,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:38" (1/1) ... [2021-12-21 13:30:38,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:38" (1/1) ... [2021-12-21 13:30:38,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:30:38,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:30:38,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:30:38,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:30:38,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:38" (1/1) ... [2021-12-21 13:30:38,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:30:38,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:30:38,187 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) [2021-12-21 13:30:38,203 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 [2021-12-21 13:30:38,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:30:38,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:30:38,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:30:38,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:30:38,334 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:30:38,336 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:30:38,709 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:30:38,717 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:30:38,717 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 13:30:38,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:30:38 BoogieIcfgContainer [2021-12-21 13:30:38,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:30:38,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:30:38,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:30:38,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:30:38,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:30:37" (1/3) ... [2021-12-21 13:30:38,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57fbfd17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:30:38, skipping insertion in model container [2021-12-21 13:30:38,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:38" (2/3) ... [2021-12-21 13:30:38,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57fbfd17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:30:38, skipping insertion in model container [2021-12-21 13:30:38,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:30:38" (3/3) ... [2021-12-21 13:30:38,728 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals.c [2021-12-21 13:30:38,734 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:30:38,734 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:30:38,775 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:30:38,780 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 [2021-12-21 13:30:38,781 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:30:38,794 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 110 states have (on average 1.7363636363636363) internal successors, (191), 111 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:38,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 13:30:38,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:38,802 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] [2021-12-21 13:30:38,802 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:38,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:38,807 INFO L85 PathProgramCache]: Analyzing trace with hash -606038097, now seen corresponding path program 1 times [2021-12-21 13:30:38,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:38,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613125122] [2021-12-21 13:30:38,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:38,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:38,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:38,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613125122] [2021-12-21 13:30:38,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613125122] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:38,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:38,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 13:30:38,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769541207] [2021-12-21 13:30:38,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:38,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 13:30:38,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:39,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 13:30:39,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 13:30:39,028 INFO L87 Difference]: Start difference. First operand has 112 states, 110 states have (on average 1.7363636363636363) internal successors, (191), 111 states have internal predecessors, (191), 0 states have call successors, (0), 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 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:39,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:39,067 INFO L93 Difference]: Finished difference Result 175 states and 293 transitions. [2021-12-21 13:30:39,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 13:30:39,069 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-12-21 13:30:39,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:39,080 INFO L225 Difference]: With dead ends: 175 [2021-12-21 13:30:39,080 INFO L226 Difference]: Without dead ends: 108 [2021-12-21 13:30:39,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 13:30:39,090 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:30:39,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:30:39,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-21 13:30:39,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-12-21 13:30:39,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.719626168224299) internal successors, (184), 107 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:39,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 184 transitions. [2021-12-21 13:30:39,136 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 184 transitions. Word has length 37 [2021-12-21 13:30:39,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:39,137 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 184 transitions. [2021-12-21 13:30:39,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:39,137 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 184 transitions. [2021-12-21 13:30:39,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 13:30:39,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:39,141 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] [2021-12-21 13:30:39,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:30:39,142 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:39,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:39,145 INFO L85 PathProgramCache]: Analyzing trace with hash -331278483, now seen corresponding path program 1 times [2021-12-21 13:30:39,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:39,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147114228] [2021-12-21 13:30:39,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:39,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:39,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:39,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147114228] [2021-12-21 13:30:39,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147114228] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:39,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:39,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:30:39,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872390098] [2021-12-21 13:30:39,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:39,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:30:39,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:39,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:30:39,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:30:39,292 INFO L87 Difference]: Start difference. First operand 108 states and 184 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:39,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:39,448 INFO L93 Difference]: Finished difference Result 174 states and 286 transitions. [2021-12-21 13:30:39,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:30:39,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-12-21 13:30:39,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:39,451 INFO L225 Difference]: With dead ends: 174 [2021-12-21 13:30:39,451 INFO L226 Difference]: Without dead ends: 108 [2021-12-21 13:30:39,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:30:39,455 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 3 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:30:39,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 685 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:30:39,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-21 13:30:39,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-12-21 13:30:39,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.3457943925233644) internal successors, (144), 107 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:39,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 144 transitions. [2021-12-21 13:30:39,476 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 144 transitions. Word has length 37 [2021-12-21 13:30:39,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:39,477 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 144 transitions. [2021-12-21 13:30:39,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:39,477 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 144 transitions. [2021-12-21 13:30:39,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-21 13:30:39,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:39,483 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] [2021-12-21 13:30:39,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:30:39,484 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:39,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:39,485 INFO L85 PathProgramCache]: Analyzing trace with hash 85749534, now seen corresponding path program 1 times [2021-12-21 13:30:39,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:39,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858047612] [2021-12-21 13:30:39,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:39,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:39,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:39,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858047612] [2021-12-21 13:30:39,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858047612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:39,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:39,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:30:39,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784058418] [2021-12-21 13:30:39,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:39,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:30:39,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:39,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:30:39,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:30:39,640 INFO L87 Difference]: Start difference. First operand 108 states and 144 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:39,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:39,666 INFO L93 Difference]: Finished difference Result 226 states and 330 transitions. [2021-12-21 13:30:39,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:30:39,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-12-21 13:30:39,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:39,670 INFO L225 Difference]: With dead ends: 226 [2021-12-21 13:30:39,670 INFO L226 Difference]: Without dead ends: 164 [2021-12-21 13:30:39,671 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 [2021-12-21 13:30:39,677 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 84 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 312 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 [2021-12-21 13:30:39,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 312 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:30:39,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-21 13:30:39,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2021-12-21 13:30:39,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.4285714285714286) internal successors, (230), 161 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:39,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 230 transitions. [2021-12-21 13:30:39,693 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 230 transitions. Word has length 76 [2021-12-21 13:30:39,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:39,693 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 230 transitions. [2021-12-21 13:30:39,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:39,694 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 230 transitions. [2021-12-21 13:30:39,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-21 13:30:39,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:39,695 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] [2021-12-21 13:30:39,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 13:30:39,696 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:39,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:39,696 INFO L85 PathProgramCache]: Analyzing trace with hash -659833196, now seen corresponding path program 1 times [2021-12-21 13:30:39,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:39,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649936710] [2021-12-21 13:30:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:39,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:39,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:39,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649936710] [2021-12-21 13:30:39,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649936710] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:39,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:39,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:30:39,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355342410] [2021-12-21 13:30:39,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:39,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:30:39,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:39,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:30:39,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:30:39,800 INFO L87 Difference]: Start difference. First operand 162 states and 230 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:39,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:39,823 INFO L93 Difference]: Finished difference Result 382 states and 578 transitions. [2021-12-21 13:30:39,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:30:39,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-12-21 13:30:39,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:39,827 INFO L225 Difference]: With dead ends: 382 [2021-12-21 13:30:39,828 INFO L226 Difference]: Without dead ends: 266 [2021-12-21 13:30:39,832 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 [2021-12-21 13:30:39,838 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 80 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 311 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 [2021-12-21 13:30:39,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 311 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:30:39,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-21 13:30:39,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2021-12-21 13:30:39,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.4866920152091254) internal successors, (391), 263 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:39,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 391 transitions. [2021-12-21 13:30:39,856 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 391 transitions. Word has length 76 [2021-12-21 13:30:39,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:39,857 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 391 transitions. [2021-12-21 13:30:39,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:39,857 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 391 transitions. [2021-12-21 13:30:39,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-21 13:30:39,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:39,858 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] [2021-12-21 13:30:39,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 13:30:39,859 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:39,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:39,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1695103242, now seen corresponding path program 1 times [2021-12-21 13:30:39,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:39,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055902456] [2021-12-21 13:30:39,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:39,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:39,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:39,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:39,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055902456] [2021-12-21 13:30:39,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055902456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:39,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:39,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:30:39,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102222180] [2021-12-21 13:30:39,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:39,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:30:39,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:39,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:30:39,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:30:39,909 INFO L87 Difference]: Start difference. First operand 264 states and 391 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:39,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:39,935 INFO L93 Difference]: Finished difference Result 676 states and 1041 transitions. [2021-12-21 13:30:39,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:30:39,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-12-21 13:30:39,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:39,942 INFO L225 Difference]: With dead ends: 676 [2021-12-21 13:30:39,942 INFO L226 Difference]: Without dead ends: 458 [2021-12-21 13:30:39,943 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 [2021-12-21 13:30:39,944 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 76 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 310 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 [2021-12-21 13:30:39,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 310 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:30:39,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-12-21 13:30:39,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2021-12-21 13:30:39,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.5186813186813186) internal successors, (691), 455 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:39,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 691 transitions. [2021-12-21 13:30:39,979 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 691 transitions. Word has length 76 [2021-12-21 13:30:39,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:39,980 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 691 transitions. [2021-12-21 13:30:39,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:39,983 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 691 transitions. [2021-12-21 13:30:39,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-21 13:30:39,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:39,985 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] [2021-12-21 13:30:39,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 13:30:39,985 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:39,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:39,986 INFO L85 PathProgramCache]: Analyzing trace with hash 100818560, now seen corresponding path program 1 times [2021-12-21 13:30:39,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:39,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041616584] [2021-12-21 13:30:39,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:39,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:40,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:40,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041616584] [2021-12-21 13:30:40,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041616584] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:40,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:40,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:30:40,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024857501] [2021-12-21 13:30:40,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:40,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:30:40,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:40,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:30:40,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:30:40,076 INFO L87 Difference]: Start difference. First operand 456 states and 691 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:40,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:40,114 INFO L93 Difference]: Finished difference Result 1228 states and 1901 transitions. [2021-12-21 13:30:40,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:30:40,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-12-21 13:30:40,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:40,120 INFO L225 Difference]: With dead ends: 1228 [2021-12-21 13:30:40,121 INFO L226 Difference]: Without dead ends: 818 [2021-12-21 13:30:40,122 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 [2021-12-21 13:30:40,123 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 72 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 309 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 [2021-12-21 13:30:40,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 309 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:30:40,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-12-21 13:30:40,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 816. [2021-12-21 13:30:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 1.5300613496932516) internal successors, (1247), 815 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:40,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1247 transitions. [2021-12-21 13:30:40,164 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1247 transitions. Word has length 76 [2021-12-21 13:30:40,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:40,164 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 1247 transitions. [2021-12-21 13:30:40,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:40,164 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1247 transitions. [2021-12-21 13:30:40,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-21 13:30:40,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:40,166 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] [2021-12-21 13:30:40,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 13:30:40,167 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:40,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:40,168 INFO L85 PathProgramCache]: Analyzing trace with hash 438611702, now seen corresponding path program 1 times [2021-12-21 13:30:40,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:40,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595482859] [2021-12-21 13:30:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:40,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:40,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:40,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595482859] [2021-12-21 13:30:40,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595482859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:40,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:40,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:30:40,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736348426] [2021-12-21 13:30:40,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:40,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:30:40,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:40,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:30:40,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:30:40,237 INFO L87 Difference]: Start difference. First operand 816 states and 1247 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:40,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:40,306 INFO L93 Difference]: Finished difference Result 2260 states and 3489 transitions. [2021-12-21 13:30:40,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:30:40,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-12-21 13:30:40,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:40,313 INFO L225 Difference]: With dead ends: 2260 [2021-12-21 13:30:40,313 INFO L226 Difference]: Without dead ends: 1490 [2021-12-21 13:30:40,314 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 [2021-12-21 13:30:40,315 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 68 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 308 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 [2021-12-21 13:30:40,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 308 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:30:40,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-12-21 13:30:40,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1488. [2021-12-21 13:30:40,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 1.527236045729657) internal successors, (2271), 1487 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:40,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 2271 transitions. [2021-12-21 13:30:40,385 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 2271 transitions. Word has length 76 [2021-12-21 13:30:40,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:40,386 INFO L470 AbstractCegarLoop]: Abstraction has 1488 states and 2271 transitions. [2021-12-21 13:30:40,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:40,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 2271 transitions. [2021-12-21 13:30:40,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-21 13:30:40,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:40,387 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] [2021-12-21 13:30:40,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 13:30:40,388 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:40,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:40,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1656597100, now seen corresponding path program 1 times [2021-12-21 13:30:40,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:40,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152891985] [2021-12-21 13:30:40,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:40,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:40,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:40,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152891985] [2021-12-21 13:30:40,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152891985] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:40,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:40,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:30:40,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592708839] [2021-12-21 13:30:40,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:40,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:30:40,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:40,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:30:40,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:30:40,490 INFO L87 Difference]: Start difference. First operand 1488 states and 2271 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:41,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:41,468 INFO L93 Difference]: Finished difference Result 18792 states and 28971 transitions. [2021-12-21 13:30:41,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 13:30:41,469 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-12-21 13:30:41,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:41,541 INFO L225 Difference]: With dead ends: 18792 [2021-12-21 13:30:41,541 INFO L226 Difference]: Without dead ends: 17350 [2021-12-21 13:30:41,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-12-21 13:30:41,550 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 1919 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1919 SdHoareTripleChecker+Valid, 1953 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:30:41,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1919 Valid, 1953 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:30:41,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17350 states. [2021-12-21 13:30:41,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17350 to 2928. [2021-12-21 13:30:41,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2927 states have (on average 1.5138366928595832) internal successors, (4431), 2927 states have internal predecessors, (4431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:41,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 4431 transitions. [2021-12-21 13:30:41,916 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 4431 transitions. Word has length 76 [2021-12-21 13:30:41,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:41,916 INFO L470 AbstractCegarLoop]: Abstraction has 2928 states and 4431 transitions. [2021-12-21 13:30:41,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:41,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 4431 transitions. [2021-12-21 13:30:41,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-21 13:30:41,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:41,918 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] [2021-12-21 13:30:41,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 13:30:41,920 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:41,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:41,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1436220828, now seen corresponding path program 1 times [2021-12-21 13:30:41,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:41,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417979825] [2021-12-21 13:30:41,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:41,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:41,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:41,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417979825] [2021-12-21 13:30:41,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417979825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:41,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:41,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:30:41,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700923458] [2021-12-21 13:30:41,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:41,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:30:41,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:41,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:30:41,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:30:41,974 INFO L87 Difference]: Start difference. First operand 2928 states and 4431 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:42,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:42,386 INFO L93 Difference]: Finished difference Result 8340 states and 12593 transitions. [2021-12-21 13:30:42,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:30:42,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-12-21 13:30:42,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:42,428 INFO L225 Difference]: With dead ends: 8340 [2021-12-21 13:30:42,429 INFO L226 Difference]: Without dead ends: 5458 [2021-12-21 13:30:42,434 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 [2021-12-21 13:30:42,436 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 59 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 232 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 [2021-12-21 13:30:42,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 232 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:30:42,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5458 states. [2021-12-21 13:30:42,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5458 to 5392. [2021-12-21 13:30:42,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5392 states, 5391 states have (on average 1.4808013355592655) internal successors, (7983), 5391 states have internal predecessors, (7983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:42,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5392 states to 5392 states and 7983 transitions. [2021-12-21 13:30:42,862 INFO L78 Accepts]: Start accepts. Automaton has 5392 states and 7983 transitions. Word has length 78 [2021-12-21 13:30:42,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:42,862 INFO L470 AbstractCegarLoop]: Abstraction has 5392 states and 7983 transitions. [2021-12-21 13:30:42,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:42,862 INFO L276 IsEmpty]: Start isEmpty. Operand 5392 states and 7983 transitions. [2021-12-21 13:30:42,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-21 13:30:42,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:42,863 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] [2021-12-21 13:30:42,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 13:30:42,864 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:42,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:42,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1502714340, now seen corresponding path program 1 times [2021-12-21 13:30:42,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:42,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186716483] [2021-12-21 13:30:42,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:42,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:43,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:43,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:43,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186716483] [2021-12-21 13:30:43,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186716483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:43,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:43,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:30:43,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347349614] [2021-12-21 13:30:43,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:43,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:30:43,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:43,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:30:43,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:30:43,082 INFO L87 Difference]: Start difference. First operand 5392 states and 7983 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:43,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:43,642 INFO L93 Difference]: Finished difference Result 10740 states and 15921 transitions. [2021-12-21 13:30:43,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:30:43,643 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-12-21 13:30:43,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:43,655 INFO L225 Difference]: With dead ends: 10740 [2021-12-21 13:30:43,656 INFO L226 Difference]: Without dead ends: 5394 [2021-12-21 13:30:43,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-12-21 13:30:43,664 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 347 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:30:43,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 710 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:30:43,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5394 states. [2021-12-21 13:30:44,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5394 to 5392. [2021-12-21 13:30:44,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5392 states, 5391 states have (on average 1.4689296976442219) internal successors, (7919), 5391 states have internal predecessors, (7919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:44,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5392 states to 5392 states and 7919 transitions. [2021-12-21 13:30:44,095 INFO L78 Accepts]: Start accepts. Automaton has 5392 states and 7919 transitions. Word has length 78 [2021-12-21 13:30:44,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:44,095 INFO L470 AbstractCegarLoop]: Abstraction has 5392 states and 7919 transitions. [2021-12-21 13:30:44,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 5392 states and 7919 transitions. [2021-12-21 13:30:44,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 13:30:44,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:44,097 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] [2021-12-21 13:30:44,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 13:30:44,097 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:44,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:44,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1075218669, now seen corresponding path program 1 times [2021-12-21 13:30:44,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:44,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912261877] [2021-12-21 13:30:44,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:44,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:44,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:44,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912261877] [2021-12-21 13:30:44,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912261877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:44,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:44,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:30:44,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642986909] [2021-12-21 13:30:44,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:44,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:30:44,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:44,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:30:44,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:30:44,159 INFO L87 Difference]: Start difference. First operand 5392 states and 7919 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:44,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:44,785 INFO L93 Difference]: Finished difference Result 9362 states and 13674 transitions. [2021-12-21 13:30:44,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:30:44,786 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-21 13:30:44,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:44,803 INFO L225 Difference]: With dead ends: 9362 [2021-12-21 13:30:44,804 INFO L226 Difference]: Without dead ends: 9360 [2021-12-21 13:30:44,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:30:44,807 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 264 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:30:44,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 629 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:30:44,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9360 states. [2021-12-21 13:30:45,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9360 to 5584. [2021-12-21 13:30:45,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5584 states, 5583 states have (on average 1.447071466953251) internal successors, (8079), 5583 states have internal predecessors, (8079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:45,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5584 states to 5584 states and 8079 transitions. [2021-12-21 13:30:45,249 INFO L78 Accepts]: Start accepts. Automaton has 5584 states and 8079 transitions. Word has length 79 [2021-12-21 13:30:45,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:45,250 INFO L470 AbstractCegarLoop]: Abstraction has 5584 states and 8079 transitions. [2021-12-21 13:30:45,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:45,250 INFO L276 IsEmpty]: Start isEmpty. Operand 5584 states and 8079 transitions. [2021-12-21 13:30:45,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-21 13:30:45,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:45,251 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] [2021-12-21 13:30:45,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 13:30:45,252 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:45,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:45,252 INFO L85 PathProgramCache]: Analyzing trace with hash 809566587, now seen corresponding path program 1 times [2021-12-21 13:30:45,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:45,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645876053] [2021-12-21 13:30:45,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:45,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:45,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:45,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645876053] [2021-12-21 13:30:45,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645876053] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:45,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:45,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:30:45,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772244523] [2021-12-21 13:30:45,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:45,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:30:45,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:45,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:30:45,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:30:45,286 INFO L87 Difference]: Start difference. First operand 5584 states and 8079 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:45,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:45,773 INFO L93 Difference]: Finished difference Result 11223 states and 16341 transitions. [2021-12-21 13:30:45,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:30:45,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-12-21 13:30:45,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:45,790 INFO L225 Difference]: With dead ends: 11223 [2021-12-21 13:30:45,790 INFO L226 Difference]: Without dead ends: 8148 [2021-12-21 13:30:45,796 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 [2021-12-21 13:30:45,797 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 85 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 317 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 [2021-12-21 13:30:45,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 317 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:30:45,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8148 states. [2021-12-21 13:30:46,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8148 to 8146. [2021-12-21 13:30:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8146 states, 8145 states have (on average 1.440024554941682) internal successors, (11729), 8145 states have internal predecessors, (11729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:46,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8146 states to 8146 states and 11729 transitions. [2021-12-21 13:30:46,414 INFO L78 Accepts]: Start accepts. Automaton has 8146 states and 11729 transitions. Word has length 80 [2021-12-21 13:30:46,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:46,415 INFO L470 AbstractCegarLoop]: Abstraction has 8146 states and 11729 transitions. [2021-12-21 13:30:46,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:46,415 INFO L276 IsEmpty]: Start isEmpty. Operand 8146 states and 11729 transitions. [2021-12-21 13:30:46,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 13:30:46,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:46,421 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 13:30:46,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 13:30:46,422 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:46,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:46,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1318686152, now seen corresponding path program 1 times [2021-12-21 13:30:46,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:46,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125436254] [2021-12-21 13:30:46,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:46,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:46,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 13:30:46,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:46,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125436254] [2021-12-21 13:30:46,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125436254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:46,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:46,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:30:46,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898753526] [2021-12-21 13:30:46,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:46,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:30:46,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:46,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:30:46,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:30:46,506 INFO L87 Difference]: Start difference. First operand 8146 states and 11729 transitions. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:49,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:49,162 INFO L93 Difference]: Finished difference Result 58336 states and 84040 transitions. [2021-12-21 13:30:49,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:30:49,163 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-21 13:30:49,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:49,271 INFO L225 Difference]: With dead ends: 58336 [2021-12-21 13:30:49,272 INFO L226 Difference]: Without dead ends: 50238 [2021-12-21 13:30:49,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:30:49,303 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 1455 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1455 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:30:49,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1455 Valid, 978 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:30:49,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50238 states. [2021-12-21 13:30:50,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50238 to 16242. [2021-12-21 13:30:50,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16242 states, 16241 states have (on average 1.4354411674157994) internal successors, (23313), 16241 states have internal predecessors, (23313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:50,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16242 states to 16242 states and 23313 transitions. [2021-12-21 13:30:50,533 INFO L78 Accepts]: Start accepts. Automaton has 16242 states and 23313 transitions. Word has length 111 [2021-12-21 13:30:50,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:50,533 INFO L470 AbstractCegarLoop]: Abstraction has 16242 states and 23313 transitions. [2021-12-21 13:30:50,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:50,534 INFO L276 IsEmpty]: Start isEmpty. Operand 16242 states and 23313 transitions. [2021-12-21 13:30:50,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 13:30:50,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:50,540 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 13:30:50,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 13:30:50,540 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:50,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:50,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1207498328, now seen corresponding path program 1 times [2021-12-21 13:30:50,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:50,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182904184] [2021-12-21 13:30:50,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:50,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 13:30:50,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:50,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182904184] [2021-12-21 13:30:50,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182904184] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:50,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:50,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:30:50,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935090982] [2021-12-21 13:30:50,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:50,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:30:50,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:50,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:30:50,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:30:50,618 INFO L87 Difference]: Start difference. First operand 16242 states and 23313 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:53,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:53,975 INFO L93 Difference]: Finished difference Result 66432 states and 95624 transitions. [2021-12-21 13:30:53,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:30:53,976 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-21 13:30:53,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:54,096 INFO L225 Difference]: With dead ends: 66432 [2021-12-21 13:30:54,097 INFO L226 Difference]: Without dead ends: 58334 [2021-12-21 13:30:54,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:30:54,127 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 1277 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:30:54,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1277 Valid, 1026 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:30:54,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58334 states. [2021-12-21 13:30:56,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58334 to 28402. [2021-12-21 13:30:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28402 states, 28401 states have (on average 1.4298440195767754) internal successors, (40609), 28401 states have internal predecessors, (40609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:56,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28402 states to 28402 states and 40609 transitions. [2021-12-21 13:30:56,342 INFO L78 Accepts]: Start accepts. Automaton has 28402 states and 40609 transitions. Word has length 111 [2021-12-21 13:30:56,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:56,342 INFO L470 AbstractCegarLoop]: Abstraction has 28402 states and 40609 transitions. [2021-12-21 13:30:56,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:56,343 INFO L276 IsEmpty]: Start isEmpty. Operand 28402 states and 40609 transitions. [2021-12-21 13:30:56,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 13:30:56,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:56,350 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 13:30:56,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 13:30:56,350 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:56,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:56,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1955829128, now seen corresponding path program 1 times [2021-12-21 13:30:56,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:56,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014619803] [2021-12-21 13:30:56,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:56,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 13:30:56,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:56,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014619803] [2021-12-21 13:30:56,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014619803] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:56,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:56,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:30:56,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534490729] [2021-12-21 13:30:56,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:56,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:30:56,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:56,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:30:56,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:30:56,430 INFO L87 Difference]: Start difference. First operand 28402 states and 40609 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:00,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:00,599 INFO L93 Difference]: Finished difference Result 74528 states and 107208 transitions. [2021-12-21 13:31:00,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:31:00,600 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-21 13:31:00,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:00,718 INFO L225 Difference]: With dead ends: 74528 [2021-12-21 13:31:00,718 INFO L226 Difference]: Without dead ends: 66430 [2021-12-21 13:31:00,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:31:00,743 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 1243 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1243 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:00,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1243 Valid, 1070 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:31:00,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66430 states. [2021-12-21 13:31:03,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66430 to 36498. [2021-12-21 13:31:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36498 states, 36497 states have (on average 1.4300627448831411) internal successors, (52193), 36497 states have internal predecessors, (52193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36498 states to 36498 states and 52193 transitions. [2021-12-21 13:31:03,751 INFO L78 Accepts]: Start accepts. Automaton has 36498 states and 52193 transitions. Word has length 111 [2021-12-21 13:31:03,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:03,752 INFO L470 AbstractCegarLoop]: Abstraction has 36498 states and 52193 transitions. [2021-12-21 13:31:03,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:03,752 INFO L276 IsEmpty]: Start isEmpty. Operand 36498 states and 52193 transitions. [2021-12-21 13:31:03,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 13:31:03,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:03,761 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 13:31:03,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 13:31:03,761 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:03,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:03,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1103679128, now seen corresponding path program 1 times [2021-12-21 13:31:03,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:03,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873643277] [2021-12-21 13:31:03,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:03,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:03,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 13:31:03,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:03,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873643277] [2021-12-21 13:31:03,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873643277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:03,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:03,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:31:03,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038193911] [2021-12-21 13:31:03,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:03,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:31:03,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:03,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:31:03,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:31:03,849 INFO L87 Difference]: Start difference. First operand 36498 states and 52193 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:08,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:08,820 INFO L93 Difference]: Finished difference Result 82624 states and 118792 transitions. [2021-12-21 13:31:08,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:31:08,821 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-21 13:31:08,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:08,919 INFO L225 Difference]: With dead ends: 82624 [2021-12-21 13:31:08,919 INFO L226 Difference]: Without dead ends: 74526 [2021-12-21 13:31:08,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:31:08,943 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 1311 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1311 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:08,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1311 Valid, 1112 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:31:09,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74526 states. [2021-12-21 13:31:12,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74526 to 44594. [2021-12-21 13:31:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44594 states, 44593 states have (on average 1.430202049649048) internal successors, (63777), 44593 states have internal predecessors, (63777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:12,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44594 states to 44594 states and 63777 transitions. [2021-12-21 13:31:12,611 INFO L78 Accepts]: Start accepts. Automaton has 44594 states and 63777 transitions. Word has length 111 [2021-12-21 13:31:12,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:12,611 INFO L470 AbstractCegarLoop]: Abstraction has 44594 states and 63777 transitions. [2021-12-21 13:31:12,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:12,612 INFO L276 IsEmpty]: Start isEmpty. Operand 44594 states and 63777 transitions. [2021-12-21 13:31:12,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 13:31:12,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:12,620 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 13:31:12,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 13:31:12,621 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:12,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:12,621 INFO L85 PathProgramCache]: Analyzing trace with hash -317316424, now seen corresponding path program 1 times [2021-12-21 13:31:12,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:12,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115213107] [2021-12-21 13:31:12,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:12,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 13:31:12,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:12,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115213107] [2021-12-21 13:31:12,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115213107] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:12,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:12,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:31:12,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330000752] [2021-12-21 13:31:12,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:12,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:31:12,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:12,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:31:12,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:31:12,702 INFO L87 Difference]: Start difference. First operand 44594 states and 63777 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:18,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:18,904 INFO L93 Difference]: Finished difference Result 90720 states and 130376 transitions. [2021-12-21 13:31:18,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:31:18,905 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-21 13:31:18,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:19,034 INFO L225 Difference]: With dead ends: 90720 [2021-12-21 13:31:19,034 INFO L226 Difference]: Without dead ends: 82622 [2021-12-21 13:31:19,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:31:19,063 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 1429 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1429 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:19,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1429 Valid, 1025 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:31:19,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82622 states. [2021-12-21 13:31:23,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82622 to 52690. [2021-12-21 13:31:23,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52690 states, 52689 states have (on average 1.4302985442881815) internal successors, (75361), 52689 states have internal predecessors, (75361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:23,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52690 states to 52690 states and 75361 transitions. [2021-12-21 13:31:23,991 INFO L78 Accepts]: Start accepts. Automaton has 52690 states and 75361 transitions. Word has length 111 [2021-12-21 13:31:23,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:23,992 INFO L470 AbstractCegarLoop]: Abstraction has 52690 states and 75361 transitions. [2021-12-21 13:31:23,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:23,992 INFO L276 IsEmpty]: Start isEmpty. Operand 52690 states and 75361 transitions. [2021-12-21 13:31:24,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-21 13:31:24,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:24,003 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:31:24,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 13:31:24,003 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:24,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:24,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1591238992, now seen corresponding path program 1 times [2021-12-21 13:31:24,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:24,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442717903] [2021-12-21 13:31:24,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:24,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:31:24,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:24,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442717903] [2021-12-21 13:31:24,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442717903] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:24,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:24,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:31:24,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225340329] [2021-12-21 13:31:24,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:24,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:31:24,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:24,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:31:24,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:31:24,163 INFO L87 Difference]: Start difference. First operand 52690 states and 75361 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:27,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:27,318 INFO L93 Difference]: Finished difference Result 89336 states and 128236 transitions. [2021-12-21 13:31:27,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:31:27,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 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 113 [2021-12-21 13:31:27,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:27,369 INFO L225 Difference]: With dead ends: 89336 [2021-12-21 13:31:27,369 INFO L226 Difference]: Without dead ends: 36694 [2021-12-21 13:31:27,402 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 [2021-12-21 13:31:27,403 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 63 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:27,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 320 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:31:27,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36694 states. [2021-12-21 13:31:30,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36694 to 36692. [2021-12-21 13:31:30,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36692 states, 36691 states have (on average 1.4310048785805785) internal successors, (52505), 36691 states have internal predecessors, (52505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:30,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36692 states to 36692 states and 52505 transitions. [2021-12-21 13:31:30,718 INFO L78 Accepts]: Start accepts. Automaton has 36692 states and 52505 transitions. Word has length 113 [2021-12-21 13:31:30,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:30,718 INFO L470 AbstractCegarLoop]: Abstraction has 36692 states and 52505 transitions. [2021-12-21 13:31:30,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:30,719 INFO L276 IsEmpty]: Start isEmpty. Operand 36692 states and 52505 transitions. [2021-12-21 13:31:30,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-21 13:31:30,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:30,725 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 13:31:30,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 13:31:30,726 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:30,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:30,726 INFO L85 PathProgramCache]: Analyzing trace with hash 406305469, now seen corresponding path program 1 times [2021-12-21 13:31:30,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:30,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851150639] [2021-12-21 13:31:30,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:30,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 13:31:30,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:30,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851150639] [2021-12-21 13:31:30,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851150639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:30,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:30,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:31:30,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343093787] [2021-12-21 13:31:30,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:30,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:31:30,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:30,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:31:30,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:31:30,807 INFO L87 Difference]: Start difference. First operand 36692 states and 52505 transitions. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)