/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:08:50,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:08:50,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:08:50,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:08:50,498 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:08:50,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:08:50,506 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:08:50,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:08:50,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:08:50,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:08:50,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:08:50,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:08:50,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:08:50,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:08:50,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:08:50,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:08:50,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:08:50,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:08:50,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:08:50,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:08:50,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:08:50,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:08:50,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:08:50,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:08:50,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 08:08:50,575 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 08:08:50,585 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 08:08:50,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 08:08:50,589 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 08:08:50,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 08:08:50,591 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:08:50,592 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:08:50,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:08:50,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:08:50,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:08:50,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:08:50,596 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:08:50,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:08:50,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:08:50,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:08:50,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:08:50,599 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:08:50,626 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:08:50,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:08:50,628 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:08:50,628 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:08:50,628 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:08:50,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:08:50,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:08:50,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:08:50,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:08:50,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:08:50,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:08:50,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:08:50,630 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:08:50,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:08:50,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:08:50,630 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:08:50,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:08:50,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:08:50,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:08:50,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:08:50,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:08:50,631 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:08:50,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:08:50,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:08:50,632 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:08:50,632 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:08:50,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:08:51,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:08:51,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:08:51,016 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:08:51,016 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:08:51,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 08:08:51,106 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fb04c8f7/d96fc112c2d6464ba7c6e4f2c8c66cba/FLAG1bf5ec60c [2020-12-22 08:08:51,920 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:08:51,920 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 08:08:51,935 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fb04c8f7/d96fc112c2d6464ba7c6e4f2c8c66cba/FLAG1bf5ec60c [2020-12-22 08:08:52,196 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fb04c8f7/d96fc112c2d6464ba7c6e4f2c8c66cba [2020-12-22 08:08:52,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:08:52,205 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:08:52,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:08:52,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:08:52,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:08:52,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:08:52" (1/1) ... [2020-12-22 08:08:52,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c3e6a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:52, skipping insertion in model container [2020-12-22 08:08:52,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:08:52" (1/1) ... [2020-12-22 08:08:52,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:08:52,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:08:52,651 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12430,12443] [2020-12-22 08:08:52,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:08:52,818 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:08:52,989 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12430,12443] [2020-12-22 08:08:53,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:08:53,149 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:08:53,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:53 WrapperNode [2020-12-22 08:08:53,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:08:53,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:08:53,155 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:08:53,155 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:08:53,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:53" (1/1) ... [2020-12-22 08:08:53,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:53" (1/1) ... [2020-12-22 08:08:53,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:08:53,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:08:53,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:08:53,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:08:53,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:53" (1/1) ... [2020-12-22 08:08:53,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:53" (1/1) ... [2020-12-22 08:08:53,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:53" (1/1) ... [2020-12-22 08:08:53,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:53" (1/1) ... [2020-12-22 08:08:53,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:53" (1/1) ... [2020-12-22 08:08:53,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:53" (1/1) ... [2020-12-22 08:08:53,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:53" (1/1) ... [2020-12-22 08:08:53,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:08:53,431 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:08:53,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:08:53,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:08:53,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:08:53,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:08:53,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:08:53,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:08:53,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:08:54,906 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:08:54,906 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:08:54,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:08:54 BoogieIcfgContainer [2020-12-22 08:08:54,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:08:54,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:08:54,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:08:54,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:08:54,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:08:52" (1/3) ... [2020-12-22 08:08:54,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6237eca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:08:54, skipping insertion in model container [2020-12-22 08:08:54,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:53" (2/3) ... [2020-12-22 08:08:54,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6237eca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:08:54, skipping insertion in model container [2020-12-22 08:08:54,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:08:54" (3/3) ... [2020-12-22 08:08:54,922 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 08:08:54,929 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:08:54,935 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:08:54,953 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:08:54,983 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:08:54,983 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:08:54,983 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:08:54,984 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:08:54,984 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:08:54,984 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:08:54,984 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:08:54,984 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:08:55,009 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states. [2020-12-22 08:08:55,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 08:08:55,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:55,027 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:08:55,028 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:55,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:55,035 INFO L82 PathProgramCache]: Analyzing trace with hash 304488522, now seen corresponding path program 1 times [2020-12-22 08:08:55,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:55,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863730651] [2020-12-22 08:08:55,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:55,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:55,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:55,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863730651] [2020-12-22 08:08:55,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:55,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:55,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859889211] [2020-12-22 08:08:55,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:55,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:55,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:55,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:55,714 INFO L87 Difference]: Start difference. First operand 319 states. Second operand 3 states. [2020-12-22 08:08:55,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:55,891 INFO L93 Difference]: Finished difference Result 568 states and 991 transitions. [2020-12-22 08:08:55,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:55,895 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2020-12-22 08:08:55,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:55,935 INFO L225 Difference]: With dead ends: 568 [2020-12-22 08:08:55,936 INFO L226 Difference]: Without dead ends: 432 [2020-12-22 08:08:55,945 INFO L677 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 [2020-12-22 08:08:55,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-12-22 08:08:56,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 430. [2020-12-22 08:08:56,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-12-22 08:08:56,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 714 transitions. [2020-12-22 08:08:56,027 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 714 transitions. Word has length 111 [2020-12-22 08:08:56,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:56,028 INFO L481 AbstractCegarLoop]: Abstraction has 430 states and 714 transitions. [2020-12-22 08:08:56,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:56,028 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 714 transitions. [2020-12-22 08:08:56,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 08:08:56,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:56,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:08:56,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:08:56,035 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:56,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:56,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1517208970, now seen corresponding path program 1 times [2020-12-22 08:08:56,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:56,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506937719] [2020-12-22 08:08:56,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:56,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506937719] [2020-12-22 08:08:56,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:56,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:56,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126332822] [2020-12-22 08:08:56,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:56,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:56,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:56,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:56,306 INFO L87 Difference]: Start difference. First operand 430 states and 714 transitions. Second operand 3 states. [2020-12-22 08:08:56,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:56,397 INFO L93 Difference]: Finished difference Result 660 states and 1105 transitions. [2020-12-22 08:08:56,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:56,397 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2020-12-22 08:08:56,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:56,407 INFO L225 Difference]: With dead ends: 660 [2020-12-22 08:08:56,407 INFO L226 Difference]: Without dead ends: 533 [2020-12-22 08:08:56,410 INFO L677 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 [2020-12-22 08:08:56,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2020-12-22 08:08:56,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 531. [2020-12-22 08:08:56,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531 states. [2020-12-22 08:08:56,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 886 transitions. [2020-12-22 08:08:56,486 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 886 transitions. Word has length 114 [2020-12-22 08:08:56,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:56,487 INFO L481 AbstractCegarLoop]: Abstraction has 531 states and 886 transitions. [2020-12-22 08:08:56,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:56,489 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 886 transitions. [2020-12-22 08:08:56,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 08:08:56,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:56,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:08:56,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:08:56,499 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:56,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:56,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1179194652, now seen corresponding path program 1 times [2020-12-22 08:08:56,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:56,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940461927] [2020-12-22 08:08:56,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:56,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940461927] [2020-12-22 08:08:56,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:56,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:56,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912507520] [2020-12-22 08:08:56,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:56,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:56,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:56,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:56,741 INFO L87 Difference]: Start difference. First operand 531 states and 886 transitions. Second operand 3 states. [2020-12-22 08:08:56,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:56,811 INFO L93 Difference]: Finished difference Result 1184 states and 1985 transitions. [2020-12-22 08:08:56,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:56,812 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2020-12-22 08:08:56,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:56,822 INFO L225 Difference]: With dead ends: 1184 [2020-12-22 08:08:56,822 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 08:08:56,827 INFO L677 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 [2020-12-22 08:08:56,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 08:08:56,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 842. [2020-12-22 08:08:56,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2020-12-22 08:08:56,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1406 transitions. [2020-12-22 08:08:56,888 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1406 transitions. Word has length 114 [2020-12-22 08:08:56,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:56,897 INFO L481 AbstractCegarLoop]: Abstraction has 842 states and 1406 transitions. [2020-12-22 08:08:56,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:56,898 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1406 transitions. [2020-12-22 08:08:56,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 08:08:56,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:56,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:08:56,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:08:56,905 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:56,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:56,905 INFO L82 PathProgramCache]: Analyzing trace with hash -236553538, now seen corresponding path program 1 times [2020-12-22 08:08:56,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:56,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385258080] [2020-12-22 08:08:56,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:57,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385258080] [2020-12-22 08:08:57,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:57,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:57,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61242657] [2020-12-22 08:08:57,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:57,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:57,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:57,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:57,066 INFO L87 Difference]: Start difference. First operand 842 states and 1406 transitions. Second operand 3 states. [2020-12-22 08:08:57,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:57,172 INFO L93 Difference]: Finished difference Result 1462 states and 2452 transitions. [2020-12-22 08:08:57,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:57,173 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 117 [2020-12-22 08:08:57,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:57,181 INFO L225 Difference]: With dead ends: 1462 [2020-12-22 08:08:57,181 INFO L226 Difference]: Without dead ends: 1122 [2020-12-22 08:08:57,182 INFO L677 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 [2020-12-22 08:08:57,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2020-12-22 08:08:57,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1120. [2020-12-22 08:08:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1120 states. [2020-12-22 08:08:57,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1872 transitions. [2020-12-22 08:08:57,235 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1872 transitions. Word has length 117 [2020-12-22 08:08:57,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:57,235 INFO L481 AbstractCegarLoop]: Abstraction has 1120 states and 1872 transitions. [2020-12-22 08:08:57,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:57,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1872 transitions. [2020-12-22 08:08:57,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 08:08:57,237 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:57,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:08:57,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:08:57,238 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:57,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:57,238 INFO L82 PathProgramCache]: Analyzing trace with hash 2147173936, now seen corresponding path program 1 times [2020-12-22 08:08:57,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:57,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507321572] [2020-12-22 08:08:57,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:57,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507321572] [2020-12-22 08:08:57,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:57,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:57,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354460895] [2020-12-22 08:08:57,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:57,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:57,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:57,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:57,349 INFO L87 Difference]: Start difference. First operand 1120 states and 1872 transitions. Second operand 3 states. [2020-12-22 08:08:57,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:57,455 INFO L93 Difference]: Finished difference Result 2861 states and 4787 transitions. [2020-12-22 08:08:57,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:57,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 117 [2020-12-22 08:08:57,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:57,468 INFO L225 Difference]: With dead ends: 2861 [2020-12-22 08:08:57,468 INFO L226 Difference]: Without dead ends: 1950 [2020-12-22 08:08:57,471 INFO L677 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 [2020-12-22 08:08:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2020-12-22 08:08:57,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1948. [2020-12-22 08:08:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1948 states. [2020-12-22 08:08:57,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 3243 transitions. [2020-12-22 08:08:57,579 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 3243 transitions. Word has length 117 [2020-12-22 08:08:57,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:57,580 INFO L481 AbstractCegarLoop]: Abstraction has 1948 states and 3243 transitions. [2020-12-22 08:08:57,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:57,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 3243 transitions. [2020-12-22 08:08:57,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 08:08:57,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:57,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:08:57,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:08:57,583 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:57,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:57,583 INFO L82 PathProgramCache]: Analyzing trace with hash 866565200, now seen corresponding path program 1 times [2020-12-22 08:08:57,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:57,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880521212] [2020-12-22 08:08:57,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:57,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880521212] [2020-12-22 08:08:57,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:57,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:57,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046785205] [2020-12-22 08:08:57,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:57,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:57,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:57,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:57,740 INFO L87 Difference]: Start difference. First operand 1948 states and 3243 transitions. Second operand 3 states. [2020-12-22 08:08:57,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:57,892 INFO L93 Difference]: Finished difference Result 3554 states and 5943 transitions. [2020-12-22 08:08:57,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:57,893 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2020-12-22 08:08:57,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:57,911 INFO L225 Difference]: With dead ends: 3554 [2020-12-22 08:08:57,911 INFO L226 Difference]: Without dead ends: 2643 [2020-12-22 08:08:57,914 INFO L677 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 [2020-12-22 08:08:57,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2020-12-22 08:08:58,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2641. [2020-12-22 08:08:58,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2641 states. [2020-12-22 08:08:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 4398 transitions. [2020-12-22 08:08:58,081 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 4398 transitions. Word has length 120 [2020-12-22 08:08:58,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:58,082 INFO L481 AbstractCegarLoop]: Abstraction has 2641 states and 4398 transitions. [2020-12-22 08:08:58,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:58,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 4398 transitions. [2020-12-22 08:08:58,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 08:08:58,084 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:58,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:08:58,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:08:58,084 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:58,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:58,090 INFO L82 PathProgramCache]: Analyzing trace with hash 83170558, now seen corresponding path program 1 times [2020-12-22 08:08:58,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:58,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548076518] [2020-12-22 08:08:58,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:58,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548076518] [2020-12-22 08:08:58,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:58,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:58,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580225216] [2020-12-22 08:08:58,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:58,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:58,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:58,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:58,250 INFO L87 Difference]: Start difference. First operand 2641 states and 4398 transitions. Second operand 3 states. [2020-12-22 08:08:58,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:58,644 INFO L93 Difference]: Finished difference Result 7226 states and 12005 transitions. [2020-12-22 08:08:58,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:58,644 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2020-12-22 08:08:58,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:58,682 INFO L225 Difference]: With dead ends: 7226 [2020-12-22 08:08:58,683 INFO L226 Difference]: Without dead ends: 4812 [2020-12-22 08:08:58,692 INFO L677 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 [2020-12-22 08:08:58,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4812 states. [2020-12-22 08:08:59,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4812 to 4810. [2020-12-22 08:08:59,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4810 states. [2020-12-22 08:08:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4810 states to 4810 states and 7944 transitions. [2020-12-22 08:08:59,090 INFO L78 Accepts]: Start accepts. Automaton has 4810 states and 7944 transitions. Word has length 120 [2020-12-22 08:08:59,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:59,091 INFO L481 AbstractCegarLoop]: Abstraction has 4810 states and 7944 transitions. [2020-12-22 08:08:59,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:59,091 INFO L276 IsEmpty]: Start isEmpty. Operand 4810 states and 7944 transitions. [2020-12-22 08:08:59,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-22 08:08:59,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:59,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:08:59,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:08:59,094 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:59,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:59,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1139352598, now seen corresponding path program 1 times [2020-12-22 08:08:59,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:59,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621548019] [2020-12-22 08:08:59,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:59,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621548019] [2020-12-22 08:08:59,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:59,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:08:59,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394346786] [2020-12-22 08:08:59,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:08:59,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:59,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:08:59,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:08:59,250 INFO L87 Difference]: Start difference. First operand 4810 states and 7944 transitions. Second operand 6 states. [2020-12-22 08:09:01,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:09:01,081 INFO L93 Difference]: Finished difference Result 29771 states and 49577 transitions. [2020-12-22 08:09:01,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 08:09:01,082 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2020-12-22 08:09:01,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:09:01,197 INFO L225 Difference]: With dead ends: 29771 [2020-12-22 08:09:01,198 INFO L226 Difference]: Without dead ends: 25188 [2020-12-22 08:09:01,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 08:09:01,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25188 states. [2020-12-22 08:09:02,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25188 to 9236. [2020-12-22 08:09:02,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9236 states. [2020-12-22 08:09:02,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9236 states to 9236 states and 15212 transitions. [2020-12-22 08:09:02,264 INFO L78 Accepts]: Start accepts. Automaton has 9236 states and 15212 transitions. Word has length 123 [2020-12-22 08:09:02,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:09:02,265 INFO L481 AbstractCegarLoop]: Abstraction has 9236 states and 15212 transitions. [2020-12-22 08:09:02,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:09:02,265 INFO L276 IsEmpty]: Start isEmpty. Operand 9236 states and 15212 transitions. [2020-12-22 08:09:02,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 08:09:02,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:09:02,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:09:02,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:09:02,268 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:09:02,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:09:02,269 INFO L82 PathProgramCache]: Analyzing trace with hash 893130139, now seen corresponding path program 1 times [2020-12-22 08:09:02,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:09:02,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070509964] [2020-12-22 08:09:02,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:09:02,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:09:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:09:02,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070509964] [2020-12-22 08:09:02,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:09:02,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:09:02,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361580328] [2020-12-22 08:09:02,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:09:02,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:09:02,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:09:02,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:09:02,378 INFO L87 Difference]: Start difference. First operand 9236 states and 15212 transitions. Second operand 4 states. [2020-12-22 08:09:03,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:09:03,708 INFO L93 Difference]: Finished difference Result 30029 states and 49739 transitions. [2020-12-22 08:09:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:09:03,709 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2020-12-22 08:09:03,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:09:03,758 INFO L225 Difference]: With dead ends: 30029 [2020-12-22 08:09:03,758 INFO L226 Difference]: Without dead ends: 21020 [2020-12-22 08:09:03,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:09:03,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21020 states. [2020-12-22 08:09:05,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21020 to 15091. [2020-12-22 08:09:05,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15091 states. [2020-12-22 08:09:05,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15091 states to 15091 states and 24876 transitions. [2020-12-22 08:09:05,129 INFO L78 Accepts]: Start accepts. Automaton has 15091 states and 24876 transitions. Word has length 124 [2020-12-22 08:09:05,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:09:05,130 INFO L481 AbstractCegarLoop]: Abstraction has 15091 states and 24876 transitions. [2020-12-22 08:09:05,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:09:05,130 INFO L276 IsEmpty]: Start isEmpty. Operand 15091 states and 24876 transitions. [2020-12-22 08:09:05,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 08:09:05,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:09:05,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:09:05,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:09:05,133 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:09:05,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:09:05,134 INFO L82 PathProgramCache]: Analyzing trace with hash -485089184, now seen corresponding path program 1 times [2020-12-22 08:09:05,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:09:05,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225024060] [2020-12-22 08:09:05,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:09:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:09:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:09:05,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225024060] [2020-12-22 08:09:05,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:09:05,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:09:05,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696004029] [2020-12-22 08:09:05,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:09:05,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:09:05,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:09:05,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:09:05,259 INFO L87 Difference]: Start difference. First operand 15091 states and 24876 transitions. Second operand 3 states. [2020-12-22 08:09:06,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:09:06,661 INFO L93 Difference]: Finished difference Result 28697 states and 47478 transitions. [2020-12-22 08:09:06,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:09:06,662 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2020-12-22 08:09:06,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:09:06,714 INFO L225 Difference]: With dead ends: 28697 [2020-12-22 08:09:06,715 INFO L226 Difference]: Without dead ends: 20733 [2020-12-22 08:09:06,731 INFO L677 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 [2020-12-22 08:09:06,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20733 states. [2020-12-22 08:09:08,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20733 to 20731. [2020-12-22 08:09:08,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20731 states. [2020-12-22 08:09:08,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20731 states to 20731 states and 34119 transitions. [2020-12-22 08:09:08,069 INFO L78 Accepts]: Start accepts. Automaton has 20731 states and 34119 transitions. Word has length 124 [2020-12-22 08:09:08,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:09:08,070 INFO L481 AbstractCegarLoop]: Abstraction has 20731 states and 34119 transitions. [2020-12-22 08:09:08,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:09:08,070 INFO L276 IsEmpty]: Start isEmpty. Operand 20731 states and 34119 transitions. [2020-12-22 08:09:08,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 08:09:08,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:09:08,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:09:08,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:09:08,072 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:09:08,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:09:08,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1854726525, now seen corresponding path program 1 times [2020-12-22 08:09:08,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:09:08,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975343373] [2020-12-22 08:09:08,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:09:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:09:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:09:08,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975343373] [2020-12-22 08:09:08,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:09:08,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:09:08,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852908035] [2020-12-22 08:09:08,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:09:08,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:09:08,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:09:08,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:09:08,186 INFO L87 Difference]: Start difference. First operand 20731 states and 34119 transitions. Second operand 4 states. [2020-12-22 08:09:10,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:09:10,951 INFO L93 Difference]: Finished difference Result 67909 states and 112035 transitions. [2020-12-22 08:09:10,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:09:10,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2020-12-22 08:09:10,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:09:11,201 INFO L225 Difference]: With dead ends: 67909 [2020-12-22 08:09:11,201 INFO L226 Difference]: Without dead ends: 47423 [2020-12-22 08:09:11,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:09:11,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47423 states. [2020-12-22 08:09:13,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47423 to 33748. [2020-12-22 08:09:13,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33748 states. [2020-12-22 08:09:13,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33748 states to 33748 states and 55389 transitions. [2020-12-22 08:09:13,276 INFO L78 Accepts]: Start accepts. Automaton has 33748 states and 55389 transitions. Word has length 125 [2020-12-22 08:09:13,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:09:13,276 INFO L481 AbstractCegarLoop]: Abstraction has 33748 states and 55389 transitions. [2020-12-22 08:09:13,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:09:13,276 INFO L276 IsEmpty]: Start isEmpty. Operand 33748 states and 55389 transitions. [2020-12-22 08:09:13,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 08:09:13,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:09:13,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:09:13,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:09:13,279 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:09:13,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:09:13,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1604001442, now seen corresponding path program 1 times [2020-12-22 08:09:13,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:09:13,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114622445] [2020-12-22 08:09:13,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:09:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:09:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:09:13,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114622445] [2020-12-22 08:09:13,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:09:13,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:09:13,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309582542] [2020-12-22 08:09:13,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:09:13,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:09:13,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:09:13,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:09:13,412 INFO L87 Difference]: Start difference. First operand 33748 states and 55389 transitions. Second operand 4 states. [2020-12-22 08:09:17,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:09:17,682 INFO L93 Difference]: Finished difference Result 109323 states and 179874 transitions. [2020-12-22 08:09:17,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:09:17,683 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2020-12-22 08:09:17,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:09:17,858 INFO L225 Difference]: With dead ends: 109323 [2020-12-22 08:09:17,858 INFO L226 Difference]: Without dead ends: 75820 [2020-12-22 08:09:17,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:09:18,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75820 states. [2020-12-22 08:09:21,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75820 to 54641. [2020-12-22 08:09:21,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54641 states. [2020-12-22 08:09:21,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54641 states to 54641 states and 89427 transitions. [2020-12-22 08:09:21,414 INFO L78 Accepts]: Start accepts. Automaton has 54641 states and 89427 transitions. Word has length 126 [2020-12-22 08:09:21,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:09:21,415 INFO L481 AbstractCegarLoop]: Abstraction has 54641 states and 89427 transitions. [2020-12-22 08:09:21,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:09:21,415 INFO L276 IsEmpty]: Start isEmpty. Operand 54641 states and 89427 transitions. [2020-12-22 08:09:21,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 08:09:21,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:09:21,417 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:09:21,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:09:21,417 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:09:21,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:09:21,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1868950812, now seen corresponding path program 1 times [2020-12-22 08:09:21,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:09:21,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790144705] [2020-12-22 08:09:21,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:09:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:09:21,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:09:21,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790144705] [2020-12-22 08:09:21,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:09:21,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:09:21,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947670619] [2020-12-22 08:09:21,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:09:21,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:09:21,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:09:21,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:09:21,537 INFO L87 Difference]: Start difference. First operand 54641 states and 89427 transitions. Second operand 4 states. [2020-12-22 08:09:28,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:09:28,099 INFO L93 Difference]: Finished difference Result 175049 states and 287186 transitions. [2020-12-22 08:09:28,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:09:28,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 08:09:28,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:09:28,384 INFO L225 Difference]: With dead ends: 175049 [2020-12-22 08:09:28,384 INFO L226 Difference]: Without dead ends: 120653 [2020-12-22 08:09:28,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:09:28,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120653 states. [2020-12-22 08:09:33,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120653 to 87422. [2020-12-22 08:09:33,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87422 states. [2020-12-22 08:09:34,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87422 states to 87422 states and 142673 transitions. [2020-12-22 08:09:34,100 INFO L78 Accepts]: Start accepts. Automaton has 87422 states and 142673 transitions. Word has length 127 [2020-12-22 08:09:34,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:09:34,101 INFO L481 AbstractCegarLoop]: Abstraction has 87422 states and 142673 transitions. [2020-12-22 08:09:34,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:09:34,101 INFO L276 IsEmpty]: Start isEmpty. Operand 87422 states and 142673 transitions. [2020-12-22 08:09:34,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 08:09:34,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:09:34,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:09:34,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:09:34,103 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:09:34,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:09:34,103 INFO L82 PathProgramCache]: Analyzing trace with hash 2012261173, now seen corresponding path program 1 times [2020-12-22 08:09:34,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:09:34,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46758854] [2020-12-22 08:09:34,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:09:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:09:34,362 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-12-22 08:09:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:09:34,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46758854] [2020-12-22 08:09:34,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:09:34,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:09:34,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941155802] [2020-12-22 08:09:34,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:09:34,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:09:34,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:09:34,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:09:34,458 INFO L87 Difference]: Start difference. First operand 87422 states and 142673 transitions. Second operand 6 states. [2020-12-22 08:09:40,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:09:40,301 INFO L93 Difference]: Finished difference Result 174601 states and 284955 transitions. [2020-12-22 08:09:40,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:09:40,301 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2020-12-22 08:09:40,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:09:40,482 INFO L225 Difference]: With dead ends: 174601 [2020-12-22 08:09:40,483 INFO L226 Difference]: Without dead ends: 87424 [2020-12-22 08:09:40,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:09:40,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87424 states. [2020-12-22 08:09:45,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87424 to 87422. [2020-12-22 08:09:45,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87422 states. [2020-12-22 08:09:46,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87422 states to 87422 states and 142048 transitions. [2020-12-22 08:09:46,137 INFO L78 Accepts]: Start accepts. Automaton has 87422 states and 142048 transitions. Word has length 129 [2020-12-22 08:09:46,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:09:46,138 INFO L481 AbstractCegarLoop]: Abstraction has 87422 states and 142048 transitions. [2020-12-22 08:09:46,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:09:46,138 INFO L276 IsEmpty]: Start isEmpty. Operand 87422 states and 142048 transitions. [2020-12-22 08:09:46,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 08:09:46,139 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:09:46,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:09:46,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:09:46,139 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:09:46,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:09:46,140 INFO L82 PathProgramCache]: Analyzing trace with hash 365685076, now seen corresponding path program 1 times [2020-12-22 08:09:46,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:09:46,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977066587] [2020-12-22 08:09:46,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:09:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:09:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:09:46,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977066587] [2020-12-22 08:09:46,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:09:46,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:09:46,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194317726] [2020-12-22 08:09:46,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:09:46,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:09:46,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:09:46,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:09:46,353 INFO L87 Difference]: Start difference. First operand 87422 states and 142048 transitions. Second operand 6 states. [2020-12-22 08:10:02,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:02,127 INFO L93 Difference]: Finished difference Result 328443 states and 534734 transitions. [2020-12-22 08:10:02,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:10:02,127 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 132 [2020-12-22 08:10:02,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:02,784 INFO L225 Difference]: With dead ends: 328443 [2020-12-22 08:10:02,784 INFO L226 Difference]: Without dead ends: 241266 [2020-12-22 08:10:02,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:10:03,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241266 states. [2020-12-22 08:10:15,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241266 to 168414. [2020-12-22 08:10:15,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168414 states. [2020-12-22 08:10:16,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168414 states to 168414 states and 272047 transitions. [2020-12-22 08:10:16,275 INFO L78 Accepts]: Start accepts. Automaton has 168414 states and 272047 transitions. Word has length 132 [2020-12-22 08:10:16,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:16,276 INFO L481 AbstractCegarLoop]: Abstraction has 168414 states and 272047 transitions. [2020-12-22 08:10:16,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:10:16,288 INFO L276 IsEmpty]: Start isEmpty. Operand 168414 states and 272047 transitions. [2020-12-22 08:10:16,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 08:10:16,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:16,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:10:16,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:10:16,289 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:16,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:16,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1550573646, now seen corresponding path program 1 times [2020-12-22 08:10:16,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:16,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621129708] [2020-12-22 08:10:16,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:16,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621129708] [2020-12-22 08:10:16,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:16,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:10:16,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338003923] [2020-12-22 08:10:16,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:10:16,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:16,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:10:16,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:10:16,494 INFO L87 Difference]: Start difference. First operand 168414 states and 272047 transitions. Second operand 5 states. [2020-12-22 08:10:40,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:40,189 INFO L93 Difference]: Finished difference Result 327635 states and 527088 transitions. [2020-12-22 08:10:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:10:40,189 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2020-12-22 08:10:40,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:41,022 INFO L225 Difference]: With dead ends: 327635 [2020-12-22 08:10:41,022 INFO L226 Difference]: Without dead ends: 327633 [2020-12-22 08:10:41,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:10:41,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327633 states. [2020-12-22 08:10:56,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327633 to 172482. [2020-12-22 08:10:56,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172482 states. [2020-12-22 08:10:56,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172482 states to 172482 states and 276088 transitions. [2020-12-22 08:10:56,923 INFO L78 Accepts]: Start accepts. Automaton has 172482 states and 276088 transitions. Word has length 133 [2020-12-22 08:10:56,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:56,923 INFO L481 AbstractCegarLoop]: Abstraction has 172482 states and 276088 transitions. [2020-12-22 08:10:56,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:10:56,924 INFO L276 IsEmpty]: Start isEmpty. Operand 172482 states and 276088 transitions. [2020-12-22 08:10:56,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-22 08:10:56,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:56,947 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:10:56,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:10:56,947 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:56,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:56,948 INFO L82 PathProgramCache]: Analyzing trace with hash -2098432369, now seen corresponding path program 1 times [2020-12-22 08:10:56,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:56,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750413381] [2020-12-22 08:10:56,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 08:10:57,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750413381] [2020-12-22 08:10:57,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:57,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:10:57,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555922373] [2020-12-22 08:10:57,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:10:57,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:57,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:10:57,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:10:57,138 INFO L87 Difference]: Start difference. First operand 172482 states and 276088 transitions. Second operand 6 states. [2020-12-22 08:11:21,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:11:21,345 INFO L93 Difference]: Finished difference Result 359636 states and 578793 transitions. [2020-12-22 08:11:21,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:11:21,345 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 163 [2020-12-22 08:11:21,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:11:21,910 INFO L225 Difference]: With dead ends: 359636 [2020-12-22 08:11:21,910 INFO L226 Difference]: Without dead ends: 283834 [2020-12-22 08:11:22,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:11:22,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283834 states.